#include "llookup.h"
#include "plookup.h"
#include "prelookup.h"
+#include "threadnotify.h"
#include "queue.h"
#include <pthread.h>
#include <sys/types.h>
#include <errno.h>
#include <time.h>
#include <string.h>
-#include <pthread.h>
+#ifdef COMPILER
+#include "thread.h"
+#endif
#define LISTEN_PORT 2156
#define RECEIVE_BUFFER_SIZE 2048
#define NUM_THREADS 10
#define PREFETCH_CACHE_SIZE 1048576 //1MB
+#define CONFIG_FILENAME "dstm.conf"
/* Global Variables */
extern int classsize[];
-extern primarypfq_t pqueue; // shared prefetch queue
+extern primarypfq_t pqueue; //Shared prefetch queue
extern mcpileq_t mcqueue; //Shared queue containing prefetch requests sorted by remote machineids
-objstr_t *prefetchcache; //Global Prefetch cache
+objstr_t *prefetchcache; //Global Prefetch cache
+pthread_mutex_t prefetchcache_mutex;// Mutex to lock Prefetch Cache
+pthread_mutexattr_t prefetchcache_mutex_attr; /* Attribute for lock to make it a recursive lock */
+extern pthread_mutex_t mainobjstore_mutex;// Mutex to lock main Object store
extern prehashtable_t pflookup; //Global Prefetch cache's lookup table
pthread_t wthreads[NUM_THREADS]; //Worker threads for working on the prefetch queue
-pthread_t tPrefetch;
+pthread_t tPrefetch; /* Primary Prefetch thread that processes the prefetch queue */
extern objstr_t *mainobjstore;
unsigned int myIpAddr;
-
+unsigned int *hostIpAddrs;
+int sizeOfHostArray;
+int numHostsInSystem;
+int myIndexInHostArray;
+unsigned int oidsPerBlock;
+unsigned int oidMin;
+unsigned int oidMax;
+void *mlist[10000];
+pthread_mutex_t mlock = PTHREAD_MUTEX_INITIALIZER;
+
+void printhex(unsigned char *, int);
plistnode_t *createPiles(transrecord_t *);
+
+void printhex(unsigned char *ptr, int numBytes)
+{
+ int i;
+ for (i = 0; i < numBytes; i++)
+ {
+ if (ptr[i] < 16)
+ printf("0%x ", ptr[i]);
+ else
+ printf("%x ", ptr[i]);
+ }
+ printf("\n");
+ return;
+}
+
inline int arrayLength(int *array) {
int i;
for(i=0 ;array[i] != -1; i++)
}
/* This function is a prefetch call generated by the compiler that
* populates the shared primary prefetch queue*/
-void prefetch(int ntuples, unsigned int *oids, short *endoffsets, short *arrayfields) {
+void prefetch(int ntuples, unsigned int *oids, unsigned short *endoffsets, short *arrayfields) {
int qnodesize;
int len = 0;
-
+ int i, rc;
+
/* Allocate for the queue node*/
char *node;
- qnodesize = sizeof(prefetchqelem_t) + sizeof(int) + ntuples * (sizeof(short) + sizeof(unsigned int)) + endoffsets[ntuples - 1] * sizeof(short);
- if((node = calloc(1, qnodesize)) == NULL) {
- printf("Calloc Error %s, %d\n", __FILE__, __LINE__);
- return;
+ if(ntuples > 0) {
+ qnodesize = sizeof(prefetchqelem_t) + sizeof(int) + ntuples * (sizeof(unsigned short) + sizeof(unsigned int)) + endoffsets[ntuples - 1] * sizeof(unsigned short);
+ if((node = calloc(1, qnodesize)) == NULL) {
+ printf("Calloc Error %s, %d\n", __FILE__, __LINE__);
+ return;
+ }
+ /* Set queue node values */
+ len = sizeof(prefetchqelem_t);
+ memcpy(node + len, &ntuples, sizeof(int));
+ len += sizeof(int);
+ memcpy(node + len, oids, ntuples*sizeof(unsigned int));
+ len += ntuples * sizeof(unsigned int);
+ memcpy(node + len, endoffsets, ntuples*sizeof(unsigned short));
+ len += ntuples * sizeof(unsigned short);
+ memcpy(node + len, arrayfields, endoffsets[ntuples-1]*sizeof(unsigned short));
+ /* Lock and insert into primary prefetch queue */
+ pthread_mutex_lock(&pqueue.qlock);
+ pre_enqueue((prefetchqelem_t *)node);
+ pthread_cond_signal(&pqueue.qcond);
+ pthread_mutex_unlock(&pqueue.qlock);
}
- /* Set queue node values */
- len = sizeof(prefetchqelem_t);
- memcpy(node + len, &ntuples, sizeof(int));
- len += sizeof(int);
- memcpy(node + len, oids, ntuples*sizeof(unsigned int));
- len += ntuples * sizeof(unsigned int);
- memcpy(node + len, endoffsets, ntuples*sizeof(short));
- len += ntuples * sizeof(short);
- memcpy(node + len, arrayfields, endoffsets[ntuples-1]*sizeof(short));
- /* Lock and insert into primary prefetch queue */
- pthread_mutex_lock(&pqueue.qlock);
- pre_enqueue((prefetchqelem_t *)node);
- pthread_cond_signal(&pqueue.qcond);
- pthread_mutex_unlock(&pqueue.qlock);
}
/* This function starts up the transaction runtime. */
int dstmStartup(const char * option) {
- pthread_t thread_Listen;
- pthread_attr_t attr;
- int master=strcmp(option, "master")==0;
+ pthread_t thread_Listen;
+ pthread_attr_t attr;
+ int master=option!=NULL && strcmp(option, "master")==0;
- myIpAddr = getMyIpAddr("eth0");
+ if (processConfigFile() != 0)
+ return 0; //TODO: return error value, cause main program to exit
+#ifdef COMPILER
+ if (!master)
+ threadcount--;
+#endif
- dstmInit();
- transInit();
+ dstmInit();
+ transInit();
- if (master) {
- pthread_attr_init(&attr);
- pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
- pthread_create(&thread_Listen, &attr, dstmListen, NULL);
- return 1;
- } else {
- dstmListen();
- return 0;
- }
+ if (master) {
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ pthread_create(&thread_Listen, &attr, dstmListen, NULL);
+ return 1;
+ } else {
+ dstmListen();
+ return 0;
+ }
}
+//TODO Use this later
+void *pCacheAlloc(objstr_t *store, unsigned int size) {
+ void *tmp;
+ objstr_t *ptr;
+ ptr = store;
+ int success = 0;
+
+ while(ptr->next != NULL) {
+ /* check if store is empty */
+ if(((unsigned int)ptr->top - (unsigned int)ptr - sizeof(objstr_t) + size) <= ptr->size) {
+ tmp = ptr->top;
+ ptr->top += size;
+ success = 1;
+ return tmp;
+ } else {
+ ptr = ptr-> next;
+ }
+ }
+
+ if(success == 0) {
+ return NULL;
+ }
+}
/* This function initiates the prefetch thread
* A queue is shared between the main thread of execution
* processes the prefetch requests */
void transInit() {
int t, rc;
+ int retval;
//Create and initialize prefetch cache structure
prefetchcache = objstrCreate(PREFETCH_CACHE_SIZE);
+ //prefetchcache->next = objstrCreate(PREFETCH_CACHE_SIZE);
+ //prefetchcache->next->next = objstrCreate(PREFETCH_CACHE_SIZE);
+
+ /* Initialize attributes for mutex */
+ pthread_mutexattr_init(&prefetchcache_mutex_attr);
+ pthread_mutexattr_settype(&prefetchcache_mutex_attr, PTHREAD_MUTEX_RECURSIVE_NP);
+
+ pthread_mutex_init(&prefetchcache_mutex, &prefetchcache_mutex_attr);
+
//Create prefetch cache lookup table
if(prehashCreate(HASH_SIZE, LOADFACTOR))
return; //Failure
queueInit();
//Initialize machine pile w/prefetch oids and offsets shared queue
mcpileqInit();
+
//Create the primary prefetch thread
- pthread_create(&tPrefetch, NULL, transPrefetch, NULL);
+ do {
+ retval=pthread_create(&tPrefetch, NULL, transPrefetch, NULL);
+ } while(retval!=0);
+ pthread_detach(tPrefetch);
+
//Create and Initialize a pool of threads
/* Threads are active for the entire period runtime is running */
for(t = 0; t< NUM_THREADS; t++) {
+ do {
rc = pthread_create(&wthreads[t], NULL, mcqProcess, (void *)t);
- if (rc) {
- printf("Thread create error %s, %d\n", __FILE__, __LINE__);
- return;
- }
+ } while(rc!=0);
+ pthread_detach(wthreads[t]);
}
}
/* This functions inserts randowm wait delays in the order of msec
* Mostly used when transaction commits retry*/
-void randomdelay(void)
+void randomdelay()
{
- struct timespec req, rem;
+ struct timespec req;
time_t t;
t = time(NULL);
req.tv_sec = 0;
req.tv_nsec = (long)(1000000 + (t%10000000)); //1-11 msec
- nanosleep(&req, &rem);
+ nanosleep(&req, NULL);
return;
}
/* This function initializes things required in the transaction start*/
transrecord_t *transStart()
{
- transrecord_t *tmp = malloc(sizeof(transrecord_t));
+ transrecord_t *tmp = calloc(1, sizeof(transrecord_t));
tmp->cache = objstrCreate(1048576);
tmp->lookupTable = chashCreate(HASH_SIZE, LOADFACTOR);
#ifdef COMPILER
objheader_t *transRead(transrecord_t *record, unsigned int oid) {
unsigned int machinenumber;
objheader_t *tmp, *objheader;
- void *objcopy;
+ objheader_t *objcopy;
int size, rc, found = 0;
void *buf;
struct timespec ts;
struct timeval tp;
+
+ if(oid == 0) {
+ return NULL;
+ }
rc = gettimeofday(&tp, NULL);
+ /* 1ms delay */
+ tp.tv_usec += 1000;
+ if (tp.tv_usec >= 1000000)
+ {
+ tp.tv_usec -= 1000000;
+ tp.tv_sec += 1;
+ }
/* Convert from timeval to timespec */
+ ts.tv_sec = tp.tv_sec;
ts.tv_nsec = tp.tv_usec * 1000;
/* Search local transaction cache */
if((objheader = (objheader_t *)chashSearch(record->lookupTable, oid)) != NULL){
- return(objheader);
+#ifdef COMPILER
+ return &objheader[1];
+#else
+ return objheader;
+#endif
} else if ((objheader = (objheader_t *) mhashSearch(oid)) != NULL) {
/* Look up in machine lookup table and copy into cache*/
- tmp = mhashSearch(oid);
- size = sizeof(objheader_t)+classsize[TYPE(tmp)];
- objcopy = objstrAlloc(record->cache, size);
- memcpy(objcopy, (void *)objheader, size);
+ GETSIZE(size, objheader);
+ size += sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(record->cache, size);
+ memcpy(objcopy, objheader, size);
/* Insert into cache's lookup table */
chashInsert(record->lookupTable, OID(objheader), objcopy);
- return(objcopy);
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
} else if((tmp = (objheader_t *) prehashSearch(oid)) != NULL) { /* Look up in prefetch cache */
- found = 1;
- size = sizeof(objheader_t)+classsize[TYPE(tmp)];
- objcopy = objstrAlloc(record->cache, size);
- memcpy(objcopy, (void *)tmp, size);
+ GETSIZE(size, tmp);
+ size+=sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(record->cache, size);
+ memcpy(objcopy, tmp, size);
/* Insert into cache's lookup table */
chashInsert(record->lookupTable, OID(tmp), objcopy);
- return(objcopy);
- } else { /* If not found anywhere, then block until object appears in prefetch cache */
-#if 0
- printf("Inside remote machine\n");
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ } else {
+ /*If object not found in prefetch cache then block until object appears in the prefetch cache */
pthread_mutex_lock(&pflookup.lock);
while(!found) {
rc = pthread_cond_timedwait(&pflookup.cond, &pflookup.lock, &ts);
- if(rc == ETIMEDOUT) {
- printf("Wait timed out\n");
- /* Check Prefetch cache again */
- if((tmp = (objheader_t *) prehashSearch(oid)) != NULL) { /* Look up in prefetch cache */
- found = 1;
- size = sizeof(objheader_t)+classsize[TYPE(tmp)];
- objcopy = objstrAlloc(record->cache, size);
- memcpy(objcopy, (void *)tmp, size);
- /* Insert into cache's lookup table */
- chashInsert(record->lookupTable, OID(tmp), objcopy);
- return(objcopy);
- } else {
- pthread_mutex_unlock(&pflookup.lock);
- break;
- }
+ /* Check Prefetch cache again */
+ if((tmp =(objheader_t *) prehashSearch(oid)) != NULL) {
+ found = 1;
+ GETSIZE(size,tmp);
+ size+=sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(record->cache, size);
+ memcpy(objcopy, tmp, size);
+ chashInsert(record->lookupTable, OID(tmp), objcopy);
+ pthread_mutex_unlock(&pflookup.lock);
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ } else if (rc == ETIMEDOUT) {
pthread_mutex_unlock(&pflookup.lock);
+ break;
}
}
-#endif
+
/* Get the object from the remote location */
machinenumber = lhashSearch(oid);
objcopy = getRemoteObj(record, machinenumber, oid);
if(objcopy == NULL) {
- //If object is not found in Remote location
+ printf("Error: Object not found in Remote location %s, %d\n", __FILE__, __LINE__);
return NULL;
+ } else {
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
}
- else {
- return(objcopy);
- }
- }
+ }
}
/* This function creates objects in the transaction record */
objheader_t *transCreateObj(transrecord_t *record, unsigned int size)
{
- objheader_t *tmp = (objheader_t *) objstrAlloc(record->cache, (sizeof(objheader_t) + size));
- OID(tmp) = getNewOID();
- tmp->version = 1;
- tmp->rcount = 1;
- STATUS(tmp) = NEW;
- chashInsert(record->lookupTable, OID(tmp), tmp);
- return tmp;
+ objheader_t *tmp = (objheader_t *) objstrAlloc(record->cache, (sizeof(objheader_t) + size));
+ tmp->notifylist = NULL;
+ OID(tmp) = getNewOID();
+ tmp->version = 1;
+ tmp->rcount = 1;
+ STATUS(tmp) = NEW;
+ chashInsert(record->lookupTable, OID(tmp), tmp);
+
+#ifdef COMPILER
+ return &tmp[1]; //want space after object header
+#else
+ return tmp;
+#endif
}
/* This function creates machine piles based on all machines involved in a
unsigned int machinenum;
void *localmachinenum;
objheader_t *headeraddr;
-
+
ptr = record->lookupTable->table;
size = record->lookupTable->size;
}
//Get machine location for object id (and whether local or not)
- if (STATUS(headeraddr) & NEW || mhashSearch(curr->key) != NULL) {
+ if (STATUS(headeraddr) & NEW || (mhashSearch(curr->key) != NULL)) {
machinenum = myIpAddr;
} else if ((machinenum = lhashSearch(curr->key)) == 0) {
printf("Error: No such machine %s, %d\n", __FILE__, __LINE__);
int transCommit(transrecord_t *record) {
unsigned int tot_bytes_mod, *listmid;
plistnode_t *pile, *pile_ptr;
- int i, rc, val;
- int pilecount = 0, offset, threadnum = 0, trecvcount = 0, tmachcount = 0;
+ int i, j, rc, val;
+ int pilecount, offset, threadnum = 0, trecvcount = 0;
char buffer[RECEIVE_BUFFER_SIZE],control;
char transid[TID_LEN];
trans_req_data_t *tosend;
char treplyctrl = 0, treplyretry = 0; /* keeps track of the common response that needs to be sent */
char localstat = 0;
- do {
- /* Look through all the objects in the transaction record and make piles
- * for each machine involved in the transaction*/
- pile_ptr = pile = createPiles(record);
- /* Create the packet to be sent in TRANS_REQUEST */
+ /* Look through all the objects in the transaction record and make piles
+ * for each machine involved in the transaction*/
+ pile_ptr = pile = createPiles(record);
- /* Count the number of participants */
- pilecount = pCount(pile);
+ /* Create the packet to be sent in TRANS_REQUEST */
- /* Create a list of machine ids(Participants) involved in transaction */
- if((listmid = calloc(pilecount, sizeof(unsigned int))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- pListMid(pile, listmid);
-
-
- /* Initialize thread variables,
- * Spawn a thread for each Participant involved in a transaction */
- pthread_t thread[pilecount];
- pthread_attr_t attr;
- pthread_cond_t tcond;
- pthread_mutex_t tlock;
- pthread_mutex_t tlshrd;
-
- thread_data_array_t *thread_data_array;
- thread_data_array = (thread_data_array_t *) malloc(sizeof(thread_data_array_t)*pilecount);
- local_thread_data_array_t *ltdata;
- if((ltdata = calloc(1, sizeof(local_thread_data_array_t))) == NULL) {
+ /* Count the number of participants */
+ pilecount = pCount(pile);
+
+ /* Create a list of machine ids(Participants) involved in transaction */
+ if((listmid = calloc(pilecount, sizeof(unsigned int))) == NULL) {
+ printf("Calloc error %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ pListMid(pile, listmid);
+
+
+ /* Initialize thread variables,
+ * Spawn a thread for each Participant involved in a transaction */
+ pthread_t thread[pilecount];
+ pthread_attr_t attr;
+ pthread_cond_t tcond;
+ pthread_mutex_t tlock;
+ pthread_mutex_t tlshrd;
+
+ thread_data_array_t *thread_data_array;
+ if((thread_data_array = (thread_data_array_t *) calloc(pilecount, sizeof(thread_data_array_t))) == NULL) {
+ printf("Calloc error %s, %d\n", __FILE__, __LINE__);
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ pDelete(pile_ptr);
+ free(listmid);
+ return 1;
+ }
+
+ local_thread_data_array_t *ltdata;
+ if((ltdata = calloc(1, sizeof(local_thread_data_array_t))) == NULL) {
+ printf("Calloc error %s, %d\n", __FILE__, __LINE__);
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ pDelete(pile_ptr);
+ free(listmid);
+ free(thread_data_array);
+ return 1;
+ }
+
+ thread_response_t rcvd_control_msg[pilecount]; /* Shared thread array that keeps track of responses of participants */
+
+ /* Initialize and set thread detach attribute */
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
+ pthread_mutex_init(&tlock, NULL);
+ pthread_cond_init(&tcond, NULL);
+
+ /* Process each machine pile */
+ while(pile != NULL) {
+ //Create transaction id
+ newtid++;
+ if ((tosend = calloc(1, sizeof(trans_req_data_t))) == NULL) {
printf("Calloc error %s, %d\n", __FILE__, __LINE__);
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ pDelete(pile_ptr);
+ free(listmid);
+ free(thread_data_array);
+ free(ltdata);
return 1;
}
-
- thread_response_t rcvd_control_msg[pilecount]; /* Shared thread array that keeps track of responses of participants */
-
- /* Initialize and set thread detach attribute */
- pthread_attr_init(&attr);
- pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
- pthread_mutex_init(&tlock, NULL);
- pthread_cond_init(&tcond, NULL);
-
- /* Process each machine pile */
- while(pile != NULL) {
- //Create transaction id
- newtid++;
- if ((tosend = calloc(1, sizeof(trans_req_data_t))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
+ tosend->f.control = TRANS_REQUEST;
+ sprintf(tosend->f.trans_id, "%x_%d", pile->mid, newtid);
+ tosend->f.mcount = pilecount;
+ tosend->f.numread = pile->numread;
+ tosend->f.nummod = pile->nummod;
+ tosend->f.numcreated = pile->numcreated;
+ tosend->f.sum_bytes = pile->sum_bytes;
+ tosend->listmid = listmid;
+ tosend->objread = pile->objread;
+ tosend->oidmod = pile->oidmod;
+ tosend->oidcreated = pile->oidcreated;
+ thread_data_array[threadnum].thread_id = threadnum;
+ thread_data_array[threadnum].mid = pile->mid;
+ thread_data_array[threadnum].buffer = tosend;
+ thread_data_array[threadnum].recvmsg = rcvd_control_msg;
+ thread_data_array[threadnum].threshold = &tcond;
+ thread_data_array[threadnum].lock = &tlock;
+ thread_data_array[threadnum].count = &trecvcount;
+ thread_data_array[threadnum].replyctrl = &treplyctrl;
+ thread_data_array[threadnum].replyretry = &treplyretry;
+ thread_data_array[threadnum].rec = record;
+ /* If local do not create any extra connection */
+ if(pile->mid != myIpAddr) { /* Not local */
+ do {
+ rc = pthread_create(&thread[threadnum], &attr, transRequest, (void *) &thread_data_array[threadnum]);
+ } while(rc!=0);
+ if(rc) {
+ perror("Error in pthread create\n");
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ pDelete(pile_ptr);
+ free(listmid);
+ for (i = 0; i < threadnum; i++)
+ free(thread_data_array[i].buffer);
+ free(thread_data_array);
+ free(ltdata);
return 1;
}
- tosend->f.control = TRANS_REQUEST;
- sprintf(tosend->f.trans_id, "%x_%d", pile->mid, newtid);
- tosend->f.mcount = pilecount;
- tosend->f.numread = pile->numread;
- tosend->f.nummod = pile->nummod;
- tosend->f.numcreated = pile->numcreated;
- tosend->f.sum_bytes = pile->sum_bytes;
- tosend->listmid = listmid;
- tosend->objread = pile->objread;
- tosend->oidmod = pile->oidmod;
- tosend->oidcreated = pile->oidcreated;
- thread_data_array[threadnum].thread_id = threadnum;
- thread_data_array[threadnum].mid = pile->mid;
- thread_data_array[threadnum].pilecount = pilecount;
- thread_data_array[threadnum].buffer = tosend;
- thread_data_array[threadnum].recvmsg = rcvd_control_msg;
- thread_data_array[threadnum].threshold = &tcond;
- thread_data_array[threadnum].lock = &tlock;
- thread_data_array[threadnum].count = &trecvcount;
- thread_data_array[threadnum].replyctrl = &treplyctrl;
- thread_data_array[threadnum].replyretry = &treplyretry;
- thread_data_array[threadnum].rec = record;
- /* If local do not create any extra connection */
- if(pile->mid != myIpAddr) { /* Not local */
- rc = pthread_create(&thread[threadnum], NULL, transRequest, (void *) &thread_data_array[threadnum]);
- if (rc) {
- perror("Error in pthread create\n");
- return 1;
- }
- } else { /*Local*/
- ltdata->tdata = &thread_data_array[threadnum];
- ltdata->transinfo = &transinfo;
- val = pthread_create(&thread[threadnum], NULL, handleLocalReq, (void *) ltdata);
- if (val) {
- perror("Error in pthread create\n");
- return 1;
- }
+ } else { /*Local*/
+ ltdata->tdata = &thread_data_array[threadnum];
+ ltdata->transinfo = &transinfo;
+ do {
+ val = pthread_create(&thread[threadnum], &attr, handleLocalReq, (void *) ltdata);
+ } while(val!=0);
+ if(val) {
+ perror("Error in pthread create\n");
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ pDelete(pile_ptr);
+ free(listmid);
+ for (i = 0; i < threadnum; i++)
+ free(thread_data_array[i].buffer);
+ free(thread_data_array);
+ free(ltdata);
+ return 1;
}
- threadnum++;
- pile = pile->next;
}
- /* Free attribute and wait for the other threads */
- pthread_attr_destroy(&attr);
- for (i = 0 ;i < pilecount ; i++) {
- rc = pthread_join(thread[i], NULL);
- if (rc)
- {
- printf("ERROR return code from pthread_join() is %d\n", rc);
- return 1;
+ threadnum++;
+ pile = pile->next;
+ }
+
+ /* Free attribute and wait for the other threads */
+ pthread_attr_destroy(&attr);
+
+ for (i = 0; i < threadnum; i++) {
+ rc = pthread_join(thread[i], NULL);
+ if(rc)
+ {
+ printf("Error: return code from pthread_join() is %d\n", rc);
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ pDelete(pile_ptr);
+ free(listmid);
+ for (j = i; j < threadnum; j++) {
+ free(thread_data_array[j].buffer);
}
- free(thread_data_array[i].buffer);
+ return 1;
}
+ free(thread_data_array[i].buffer);
+ }
- /* Free resources */
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- free(listmid);
- pDelete(pile_ptr);
+ /* Free resources */
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ free(listmid);
+ pDelete(pile_ptr);
+
+
+ if(treplyctrl == TRANS_ABORT) {
+ /* Free Resources */
+ objstrDelete(record->cache);
+ chashDelete(record->lookupTable);
+ free(record);
free(thread_data_array);
free(ltdata);
-
- /* wait a random amount of time */
- if (treplyretry == 1)
- randomdelay();
-
- /* Retry trans commit procedure if not sucessful in the first try */
- } while (treplyretry == 1);
+ return TRANS_ABORT;
+ } else if(treplyctrl == TRANS_COMMIT) {
+ /* Free Resources */
+ objstrDelete(record->cache);
+ chashDelete(record->lookupTable);
+ free(record);
+ free(thread_data_array);
+ free(ltdata);
+ return 0;
+ } else {
+ //TODO Add other cases
+ printf("DEBUG-> THIS SHOULD NOT HAPPEN.....EXIT PROGRAM\n");
+ exit(-1);
+ }
return 0;
}
void *transRequest(void *threadarg) {
int sd, i, n;
struct sockaddr_in serv_addr;
- struct hostent *server;
thread_data_array_t *tdata;
objheader_t *headeraddr;
char buffer[RECEIVE_BUFFER_SIZE], control, recvcontrol;
char machineip[16], retval;
+
tdata = (thread_data_array_t *) threadarg;
/* Send Trans Request */
if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("Error in socket for TRANS_REQUEST\n");
- return NULL;
+ pthread_exit(NULL);
}
bzero((char*) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
/* Open Connection */
if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
perror("Error in connect for TRANS_REQUEST\n");
- return NULL;
+ close(sd);
+ pthread_exit(NULL);
}
- printf("DEBUG-> trans.c Sending TRANS_REQUEST to mid %s\n", machineip);
/* Send bytes of data with TRANS_REQUEST control message */
if (send(sd, &(tdata->buffer->f), sizeof(fixed_data_t),MSG_NOSIGNAL) < sizeof(fixed_data_t)) {
perror("Error sending fixed bytes for thread\n");
- return NULL;
+ close(sd);
+ pthread_exit(NULL);
}
/* Send list of machines involved in the transaction */
{
- int size=sizeof(unsigned int)*tdata->pilecount;
+ int size=sizeof(unsigned int)*tdata->buffer->f.mcount;
if (send(sd, tdata->buffer->listmid, size, MSG_NOSIGNAL) < size) {
perror("Error sending list of machines for thread\n");
- return NULL;
+ close(sd);
+ pthread_exit(NULL);
}
}
/* Send oids and version number tuples for objects that are read */
int size=(sizeof(unsigned int)+sizeof(short))*tdata->buffer->f.numread;
if (send(sd, tdata->buffer->objread, size, MSG_NOSIGNAL) < size) {
perror("Error sending tuples for thread\n");
- return NULL;
+ close(sd);
+ pthread_exit(NULL);
}
}
/* Send objects that are modified */
for(i = 0; i < tdata->buffer->f.nummod ; i++) {
int size;
headeraddr = chashSearch(tdata->rec->lookupTable, tdata->buffer->oidmod[i]);
- size=sizeof(objheader_t)+classsize[TYPE(headeraddr)];
+ GETSIZE(size,headeraddr);
+ size+=sizeof(objheader_t);
if (send(sd, headeraddr, size, MSG_NOSIGNAL) < size) {
perror("Error sending obj modified for thread\n");
- return NULL;
+ close(sd);
+ pthread_exit(NULL);
}
}
/* Read control message from Participant */
if((n = read(sd, &control, sizeof(char))) <= 0) {
perror("Error in reading control message from Participant\n");
- return NULL;
+ close(sd);
+ pthread_exit(NULL);
}
+
recvcontrol = control;
/* Update common data structure and increment count */
(*(tdata->count))++; /* keeps track of no of messages received by the coordinator */
/* Wake up the threads and invoke decideResponse (once) */
- if(*(tdata->count) == tdata->pilecount) {
- if (decideResponse(tdata) != 0) {
- printf("decideResponse returned error %s,%d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(tdata->lock);
- close(sd);
- return NULL;
- }
+ if(*(tdata->count) == tdata->buffer->f.mcount) {
+ decideResponse(tdata);
pthread_cond_broadcast(tdata->threshold);
} else {
pthread_cond_wait(tdata->threshold, tdata->lock);
* to all participants in their respective socket */
if (sendResponse(tdata, sd) == 0) {
printf("sendResponse returned error %s,%d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(tdata->lock);
close(sd);
- return NULL;
+ pthread_exit(NULL);
+ }
+
+ do {
+ retval = recv((int)sd, &control, sizeof(char), 0);
+ } while (retval < sizeof(char));
+
+ if(control == TRANS_UNSUCESSFUL) {
+ //printf("DEBUG-> TRANS_ABORTED\n");
+ } else if(control == TRANS_SUCESSFUL) {
+ //printf("DEBUG-> TRANS_SUCCESSFUL\n");
+ } else {
+ //printf("DEBUG-> Error: Incorrect Transaction End Message %d\n", control);
}
/* Close connection */
/* This function decides the reponse that needs to be sent to
* all Participant machines after the TRANS_REQUEST protocol */
-int decideResponse(thread_data_array_t *tdata) {
+void decideResponse(thread_data_array_t *tdata) {
char control;
int i, transagree = 0, transdisagree = 0, transsoftabort = 0; /* Counters to formulate decision of what
message to send */
- for (i = 0 ; i < tdata->pilecount ; i++) {
+ for (i = 0 ; i < tdata->buffer->f.mcount; i++) {
control = tdata->recvmsg[i].rcv_status; /* tdata: keeps track of all participant responses
written onto the shared array */
switch(control) {
+ default:
+ printf("Participant sent unknown message in %s, %d\n", __FILE__, __LINE__);
+ /* treat as disagree, pass thru */
case TRANS_DISAGREE:
transdisagree++;
break;
case TRANS_SOFT_ABORT:
transsoftabort++;
break;
- default:
- printf("Participant sent unknown message in %s, %d\n", __FILE__, __LINE__);
- return -1;
}
}
- /* Send Abort */
if(transdisagree > 0) {
+ /* Send Abort */
*(tdata->replyctrl) = TRANS_ABORT;
- /* Free resources */
- objstrDelete(tdata->rec->cache);
- chashDelete(tdata->rec->lookupTable);
- free(tdata->rec);
- } else if(transagree == tdata->pilecount){
+ *(tdata->replyretry) = 0;
+ /* clear objects from prefetch cache */
+ for (i = 0; i < tdata->buffer->f.numread; i++)
+ prehashRemove(*((unsigned int *)(((char *)tdata->buffer->objread) + (sizeof(unsigned int) + sizeof(unsigned short))*i)));
+ for (i = 0; i < tdata->buffer->f.nummod; i++)
+ prehashRemove(tdata->buffer->oidmod[i]);
+ } else if(transagree == tdata->buffer->f.mcount){
/* Send Commit */
*(tdata->replyctrl) = TRANS_COMMIT;
- /* Free resources */
- objstrDelete(tdata->rec->cache);
- chashDelete(tdata->rec->lookupTable);
- free(tdata->rec);
- } else if(transsoftabort > 0 && transdisagree == 0) {
+ *(tdata->replyretry) = 0;
+ } else {
/* Send Abort in soft abort case followed by retry commiting transaction again*/
*(tdata->replyctrl) = TRANS_ABORT;
*(tdata->replyretry) = 1;
- } else {
- return -1;
}
- return 0;
+ return;
}
-/* This function sends the final response to remote machines per thread in their respective socket id */
+/* This function sends the final response to remote machines per thread in their respective socket id
+ * It returns a char that is only needed to check the correctness of execution of this function inside
+ * transRequest()*/
char sendResponse(thread_data_array_t *tdata, int sd) {
- int n, N, sum, oidcount = 0;
+ int n, N, sum, oidcount = 0, control;
char *ptr, retval = 0;
unsigned int *oidnotfound;
+ control = *(tdata->replyctrl);
+ if (send(sd, &control, sizeof(char), MSG_NOSIGNAL) < sizeof(char)) {
+ perror("Error sending ctrl message for participant\n");
+ return 0;
+ }
+
+ //FIXME read missing objects
/* If the decided response is due to a soft abort and missing objects at the Participant's side */
+ /*
if(tdata->recvmsg[tdata->thread_id].rcv_status == TRANS_SOFT_ABORT) {
- /* Read list of objects missing */
+ // Read list of objects missing
if((read(sd, &oidcount, sizeof(int)) != 0) && (oidcount != 0)) {
N = oidcount * sizeof(unsigned int);
if((oidnotfound = calloc(oidcount, sizeof(unsigned int))) == NULL) {
}
retval = TRANS_SOFT_ABORT;
}
+ */
+
/* If the decided response is TRANS_ABORT */
if(*(tdata->replyctrl) == TRANS_ABORT) {
retval = TRANS_ABORT;
- } else if(*(tdata->replyctrl) == TRANS_COMMIT) { /* If the decided response is TRANS_COMMIT */
+ } else if(*(tdata->replyctrl) == TRANS_COMMIT) { /* If the decided response is TRANS_COMMIT */
retval = TRANS_COMMIT;
}
-
- if (send(sd, tdata->replyctrl, sizeof(char),MSG_NOSIGNAL) < sizeof(char)) {
- perror("Error sending ctrl message for participant\n");
- }
-
+
return retval;
}
/* This function opens a connection, places an object read request to the
* remote machine, reads the control message and object if available and
* copies the object and its header to the local cache.
- * TODO replace mnum and midtoIP() with MACHINE_IP address later */
+ * */
void *getRemoteObj(transrecord_t *record, unsigned int mnum, unsigned int oid) {
int sd, size, val;
struct sockaddr_in serv_addr;
- struct hostent *server;
char control;
char machineip[16];
objheader_t *h;
void *objcopy;
+
if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("Error in socket\n");
return NULL;
}
+
bzero((char*) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(LISTEN_PORT);
- //serv_addr.sin_addr.s_addr = inet_addr(MACHINE_IP);
midtoIP(mnum,machineip);
machineip[15] = '\0';
serv_addr.sin_addr.s_addr = inet_addr(machineip);
+
/* Open connection */
if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
- perror("Error in connect\n");
+ perror("getRemoteObj() Error in connect\n");
return NULL;
}
char readrequest[sizeof(char)+sizeof(unsigned int)];
readrequest[0] = READ_REQUEST;
*((unsigned int *)(&readrequest[1])) = oid;
- if (send(sd, &readrequest, sizeof(readrequest), MSG_NOSIGNAL) < sizeof(readrequest)) {
+ if (send(sd, readrequest, sizeof(readrequest), MSG_NOSIGNAL) < sizeof(readrequest)) {
perror("Error sending message\n");
return NULL;
}
-#ifdef DEBUG1
- printf("DEBUG -> ready to rcv ...\n");
-#endif
/* Read response from the Participant */
if((val = read(sd, &control, sizeof(char))) <= 0) {
perror("No control response for getRemoteObj sent\n");
return NULL;
}
objcopy = objstrAlloc(record->cache, size);
- if((val = read(sd, objcopy, size)) <= 0) {
+ if((val = read(sd, (char *)objcopy, size)) <= 0) {
perror("No objects are read from the remote participant\n");
return NULL;
}
* based on common agreement it either commits or aborts the transaction.
* It also frees the memory resources */
void *handleLocalReq(void *threadarg) {
- int val, i = 0, size, offset = 0;
- short version;
- char control = 0, *ptr;
- unsigned int oid;
unsigned int *oidnotfound = NULL, *oidlocked = NULL;
- void *mobj, *modptr;
- objheader_t *headptr, *headeraddr;
local_thread_data_array_t *localtdata;
+ int objnotfound = 0, objlocked = 0;
+ int v_nomatch = 0, v_matchlock = 0, v_matchnolock = 0;
+ int numread, i;
+ unsigned int oid;
+ unsigned short version;
+ void *mobj;
+ objheader_t *headptr;
localtdata = (local_thread_data_array_t *) threadarg;
/* Counters and arrays to formulate decision on control message to be sent */
oidnotfound = (unsigned int *) calloc((localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod), sizeof(unsigned int));
oidlocked = (unsigned int *) calloc((localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod), sizeof(unsigned int));
- int objnotfound = 0, objlocked = 0;
- int v_nomatch = 0, v_matchlock = 0, v_matchnolock = 0;
-
- /* modptr points to the beginning of the object store
- * created at the Pariticipant */
- if ((modptr = objstrAlloc(mainobjstore, localtdata->tdata->buffer->f.sum_bytes)) == NULL) {
- printf("objstrAlloc error for modified objects %s, %d\n", __FILE__, __LINE__);
- return NULL;
- }
- /* Write modified objects into the mainobject store */
- for(i = 0; i< localtdata->tdata->buffer->f.nummod; i++) {
- headeraddr = chashSearch(localtdata->tdata->rec->lookupTable, localtdata->tdata->buffer->oidmod[i]);
- size = sizeof(objheader_t) + classsize[TYPE(headeraddr)];
- memcpy(modptr+offset, headeraddr, size);
- offset += size;
- }
- /* Write new objects into the mainobject store */
- for(i = 0; i< localtdata->tdata->buffer->f.numcreated; i++) {
- headeraddr = chashSearch(localtdata->tdata->rec->lookupTable, localtdata->tdata->buffer->oidcreated[i]);
- size = sizeof(objheader_t) + classsize[TYPE(headeraddr)];
- memcpy(modptr+offset, headeraddr, size);
- offset += size;
- }
-
- ptr = modptr;
- offset = 0; //Reset
+ numread = localtdata->tdata->buffer->f.numread;
/* Process each oid in the machine pile/ group per thread */
for (i = 0; i < localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod; i++) {
- if (i < localtdata->tdata->buffer->f.numread) {//Objs only read and not modified
+ if (i < localtdata->tdata->buffer->f.numread) {
int incr = sizeof(unsigned int) + sizeof(short);// Offset that points to next position in the objread array
incr *= i;
- oid = *((unsigned int *)(localtdata->tdata->buffer->objread + incr));
- incr += sizeof(unsigned int);
- version = *((short *)(localtdata->tdata->buffer->objread + incr));
- } else {//Objs modified
- headptr = (objheader_t *)ptr;
+ oid = *((unsigned int *)(((char *)localtdata->tdata->buffer->objread) + incr));
+ version = *((short *)(((char *)localtdata->tdata->buffer->objread) + incr + sizeof(unsigned int)));
+ } else { // Objects Modified
+ int tmpsize;
+ headptr = (objheader_t *) chashSearch(localtdata->tdata->rec->lookupTable, localtdata->tdata->buffer->oidmod[i-numread]);
+ if (headptr == NULL) {
+ printf("Error: handleLocalReq() returning NULL %s, %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
oid = OID(headptr);
version = headptr->version;
- ptr += sizeof(objheader_t) + classsize[TYPE(headptr)];
}
-
/* Check if object is still present in the machine since the beginning of TRANS_REQUEST */
/* Save the oids not found and number of oids not found for later use */
- if ((mobj = mhashSearch(oid)) == NULL) {/* Obj not found */
+ if ((mobj = mhashSearch(oid)) == NULL) { /* Obj not found */
/* Save the oids not found and number of oids not found for later use */
oidnotfound[objnotfound] = oid;
objnotfound++;
} else { /* If Obj found in machine (i.e. has not moved) */
/* Check if Obj is locked by any previous transaction */
- if (STATUS(((objheader_t *)mobj)) & LOCK) {
- if (version == ((objheader_t *)mobj)->version) { /* If not locked then match versions */
+ if ((STATUS((objheader_t *)mobj) & LOCK) == LOCK) {
+ if (version == ((objheader_t *)mobj)->version) { /* If locked then match versions */
v_matchlock++;
} else {/* If versions don't match ...HARD ABORT */
v_nomatch++;
}
} else {/* If Obj is not locked then lock object */
STATUS(((objheader_t *)mobj)) |= LOCK;
- //TODO Remove this for Testing
- randomdelay();
-
/* Save all object oids that are locked on this machine during this transaction request call */
oidlocked[objlocked] = OID(((objheader_t *)mobj));
objlocked++;
}
}
}
- }
-
+ } // End for
/* Condition to send TRANS_AGREE */
if(v_matchnolock == localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod) {
localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_AGREE;
/* Condition to send TRANS_SOFT_ABORT */
if((v_matchlock > 0 && v_nomatch == 0) || (objnotfound > 0 && v_nomatch == 0)) {
localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_SOFT_ABORT;
- //TODO currently the only soft abort case that is supported is when object locked by previous
- //transaction => v_matchlock > 0
- //The other case for SOFT ABORT i.e. when object is not found but versions match is not supported
- /* Send number of oids not found and the missing oids if objects are missing in the machine */
- /* TODO Remember to store the oidnotfound for later use
- if(objnotfound != 0) {
- int size = sizeof(unsigned int)* objnotfound;
- }
- */
}
/* Fill out the trans_commit_data_t data structure. This is required for a trans commit process
* if Participant receives a TRANS_COMMIT */
localtdata->transinfo->objlocked = oidlocked;
localtdata->transinfo->objnotfound = oidnotfound;
- localtdata->transinfo->modptr = modptr;
+ localtdata->transinfo->modptr = NULL;
localtdata->transinfo->numlocked = objlocked;
localtdata->transinfo->numnotfound = objnotfound;
-
/* Lock and update count */
//Thread sleeps until all messages from pariticipants are received by coordinator
pthread_mutex_lock(localtdata->tdata->lock);
(*(localtdata->tdata->count))++; /* keeps track of no of messages received by the coordinator */
/* Wake up the threads and invoke decideResponse (once) */
- if(*(localtdata->tdata->count) == localtdata->tdata->pilecount) {
- if (decideResponse(localtdata->tdata) != 0) {
- printf("decideResponse returned error %s,%d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(localtdata->tdata->lock);
- return NULL;
- }
+ if(*(localtdata->tdata->count) == localtdata->tdata->buffer->f.mcount) {
+ decideResponse(localtdata->tdata);
pthread_cond_broadcast(localtdata->tdata->threshold);
} else {
pthread_cond_wait(localtdata->tdata->threshold, localtdata->tdata->lock);
}
pthread_mutex_unlock(localtdata->tdata->lock);
-
- /*Based on DecideResponse(), Either COMMIT or ABORT the operation*/
if(*(localtdata->tdata->replyctrl) == TRANS_ABORT){
- if(transAbortProcess(modptr,oidlocked, localtdata->transinfo->numlocked, localtdata->tdata->buffer->f.nummod) != 0) {
+ if(transAbortProcess(localtdata) != 0) {
printf("Error in transAbortProcess() %s,%d\n", __FILE__, __LINE__);
- return NULL;
+ pthread_exit(NULL);
}
- }else if(*(localtdata->tdata->replyctrl) == TRANS_COMMIT){
- if(transComProcess(modptr, localtdata->tdata->buffer->oidmod, localtdata->tdata->buffer->oidcreated, oidlocked, localtdata->tdata->buffer->f.nummod, localtdata->tdata->buffer->f.numcreated, localtdata->transinfo->numlocked) != 0) {
+ } else if(*(localtdata->tdata->replyctrl) == TRANS_COMMIT) {
+ if(transComProcess(localtdata) != 0) {
printf("Error in transComProcess() %s,%d\n", __FILE__, __LINE__);
- return NULL;
+ pthread_exit(NULL);
}
}
-
/* Free memory */
-
if (localtdata->transinfo->objlocked != NULL) {
free(localtdata->transinfo->objlocked);
- localtdata->transinfo->objlocked = NULL;
}
if (localtdata->transinfo->objnotfound != NULL) {
free(localtdata->transinfo->objnotfound);
- localtdata->transinfo->objnotfound = NULL;
}
pthread_exit(NULL);
}
-/* This function completes the ABORT process if the transaction is aborting
-*/
-int transAbortProcess(void *modptr, unsigned int *objlocked, int numlocked, int nummod) {
- char *ptr;
- int i;
- objheader_t *tmp_header;
+
+/* This function completes the ABORT process if the transaction is aborting */
+int transAbortProcess(local_thread_data_array_t *localtdata) {
+ int i, numlocked;
+ unsigned int *objlocked;
void *header;
- /* Set all ref counts as 1 and do garbage collection */
- ptr = (char *)modptr;
- for(i = 0; i< nummod; i++) {
- tmp_header = (objheader_t *)ptr;
- tmp_header->rcount = 0;
- ptr += sizeof(objheader_t) + classsize[TYPE(tmp_header)];
- }
- /* Unlock objects that was locked due to this transaction */
- for(i = 0; i< numlocked; i++) {
+ numlocked = localtdata->transinfo->numlocked;
+ objlocked = localtdata->transinfo->objlocked;
+
+ for (i = 0; i < numlocked; i++) {
if((header = mhashSearch(objlocked[i])) == NULL) {
printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
return 1;
STATUS(((objheader_t *)header)) &= ~(LOCK);
}
- /* Send ack to Coordinator */
-
- /*Free the pointer */
- ptr = NULL;
return 0;
}
-/*This function completes the COMMIT process is the transaction is commiting
-*/
-int transComProcess(void *modptr, unsigned int *oidmod, unsigned int *oidcreated, unsigned int *objlocked, int nummod, int numcreated, int numlocked) {
- objheader_t *header;
- int i = 0, offset = 0;
- char control;
-
- /* Process each modified object saved in the mainobject store */
- for(i = 0; i < nummod; i++) {
+/*This function completes the COMMIT process is the transaction is commiting*/
+int transComProcess(local_thread_data_array_t *localtdata) {
+ objheader_t *header, *tcptr;
+ int i, nummod, tmpsize, numcreated, numlocked;
+ unsigned int *oidmod, *oidcreated, *oidlocked;
+ void *ptrcreate;
+
+ nummod = localtdata->tdata->buffer->f.nummod;
+ oidmod = localtdata->tdata->buffer->oidmod;
+ numcreated = localtdata->tdata->buffer->f.numcreated;
+ oidcreated = localtdata->tdata->buffer->oidcreated;
+ numlocked = localtdata->transinfo->numlocked;
+ oidlocked = localtdata->transinfo->objlocked;
+
+ for (i = 0; i < nummod; i++) {
if((header = (objheader_t *) mhashSearch(oidmod[i])) == NULL) {
- printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ printf("Error: transComProcess() mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
return 1;
}
- /* Change reference count of older address and free space in objstr ?? */
- header->rcount = 0;
-
- /* Change ptr address in mhash table */
- mhashRemove(oidmod[i]); //TODO: this shouldn't be necessary
- mhashInsert(oidmod[i], (((char *)modptr) + offset));
- offset += sizeof(objheader_t) + classsize[TYPE(header)];
-
- /* Update object version number */
- header = (objheader_t *) mhashSearch(oidmod[i]);
+ /* Copy from transaction cache -> main object store */
+ if ((tcptr = ((objheader_t *) chashSearch(localtdata->tdata->rec->lookupTable, oidmod[i]))) == NULL) {
+ printf("Error: transComProcess() chashSearch returned NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ GETSIZE(tmpsize, header);
+ pthread_mutex_lock(&mainobjstore_mutex);
+ memcpy((char*)header+sizeof(objheader_t), (char *)tcptr+ sizeof(objheader_t), tmpsize);
header->version += 1;
+ if(header->notifylist != NULL) {
+ notifyAll(&header->notifylist, OID(header), header->version);
+ }
+ pthread_mutex_unlock(&mainobjstore_mutex);
}
-
- for (i = 0; i < numcreated; i++)
- {
- header = (objheader_t *)(((char *)modptr) + offset);
- mhashInsert(oidcreated[i], (((char *)modptr) + offset));
- offset += sizeof(objheader_t) + classsize[TYPE(header)];
-
+ /* If object is newly created inside transaction then commit it */
+ for (i = 0; i < numcreated; i++) {
+ if ((header = ((objheader_t *) chashSearch(localtdata->tdata->rec->lookupTable, oidcreated[i]))) == NULL) {
+ printf("Error: transComProcess() chashSearch returned NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ GETSIZE(tmpsize, header);
+ tmpsize += sizeof(objheader_t);
+ pthread_mutex_lock(&mainobjstore_mutex);
+ if ((ptrcreate = objstrAlloc(mainobjstore, tmpsize)) == NULL) {
+ printf("Error: transComProcess() failed objstrAlloc %s, %d\n", __FILE__, __LINE__);
+ pthread_mutex_unlock(&mainobjstore_mutex);
+ return 1;
+ }
+ pthread_mutex_unlock(&mainobjstore_mutex);
+ memcpy(ptrcreate, header, tmpsize);
+ mhashInsert(oidcreated[i], ptrcreate);
lhashInsert(oidcreated[i], myIpAddr);
}
-
/* Unlock locked objects */
for(i = 0; i < numlocked; i++) {
- if((header = (objheader_t *) mhashSearch(objlocked[i])) == NULL) {
+ if((header = (objheader_t *) mhashSearch(oidlocked[i])) == NULL) {
printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
return 1;
}
STATUS(header) &= ~(LOCK);
}
- //TODO Update location lookup table
-
- /* Send ack to Coordinator */
return 0;
}
oid = GET_PTR_OID(ptr);
endoffsets = GET_PTR_EOFF(ptr, ntuples);
arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
+
/* Find offset length for each tuple */
int numoffset[ntuples];
numoffset[0] = endoffsets[0];
}
/* Check for redundant tuples by comparing oids of each tuple */
for(i = 0; i < ntuples; i++) {
- if(oid[i] == -1)
+ if(oid[i] == 0)
continue;
for(j = i+1 ; j < ntuples; j++) {
- if(oid[j] == -1)
+ if(oid[j] == 0)
continue;
/*If oids of tuples match */
if (oid[i] == oid[j]) {
if(i == 0) {
k = 0;
- index = endoffsets[j -1];
- for(count = 0; count < slength; count ++) {
- if (arryfields[k] != arryfields[index]) {
- break;
- }
- index++;
- k++;
- }
} else {
k = endoffsets[i-1];
- index = endoffsets[j-1];
- printf("Value of slength = %d\n", slength);
- for(count = 0; count < slength; count++) {
- if(arryfields[k] != arryfields[index]) {
- break;
- }
- index++;
- k++;
- }
}
-
+ index = endoffsets[j -1];
+ for(count = 0; count < slength; count ++) {
+ if (arryfields[k] != arryfields[index]) {
+ break;
+ }
+ index++;
+ k++;
+ }
if(slength == count) {
- oid[sindex] = -1;
+ oid[sindex] = 0;
}
}
}
}
}
-
-void checkPreCache(prefetchqelem_t *node, int *numoffset, int counter, int loopcount, unsigned int objoid, int index, int iter, int oidnfound) {
- char *ptr, *tmp;
- int ntuples, i, k, flag;
- unsigned int * oid;
- short *endoffsets, *arryfields;
- objheader_t *header;
-
- ptr = (char *) node;
- ntuples = *(GET_NTUPLES(ptr));
- oid = GET_PTR_OID(ptr);
- endoffsets = GET_PTR_EOFF(ptr, ntuples);
- arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
-
- if(oidnfound == 1) {
- if((header = (objheader_t *) prehashSearch(objoid)) == NULL) {
- return;
- } else { //Found in Prefetch Cache
- //TODO Decide if object is too old, if old remove from cache
- tmp = (char *) header;
- /* Check if any of the offset oid is available in the Prefetch cache */
- for(i = counter; i < loopcount; i++) {
- objoid = *(tmp + sizeof(objheader_t) + arryfields[counter]);
- if((header = (objheader_t *)prehashSearch(objoid)) != NULL) {
- flag = 0;
- } else {
- flag = 1;
- break;
- }
- }
- }
- } else {
- for(i = counter; i<loopcount; i++) {
- if((header = (objheader_t *)prehashSearch(objoid)) != NULL) {
- tmp = (char *) header;
- objoid = *(tmp + sizeof(objheader_t) + arryfields[index]);
- flag = 0;
- index++;
- } else {
- flag = 1;
- break;
- }
- }
- }
-
- /* If oid not found locally or in prefetch cache then
- * assign the latest oid found as the new oid
- * and copy left over offsets into the arrayoffsetfieldarray*/
- oid[iter] = objoid;
- numoffset[iter] = numoffset[iter] - (i+1);
- for(k = 0; k < numoffset[iter] ; k++) {
- arryfields[endoffsets[counter]+k] = arryfields[endoffsets[counter]+k+1];
- }
-
- if(flag == 0) {
- oid[iter] = -1;
- numoffset[iter] = 0;
- }
-}
-
/* This function makes machine piles to be added into the machine pile queue for each prefetch call */
prefetchpile_t *makePreGroups(prefetchqelem_t *node, int *numoffset) {
- char *ptr, *tmp;
- int ntuples, slength, i, machinenum;
- int maxoffset;
+ char *ptr;
+ int ntuples, i, machinenum, count=0;
unsigned int *oid;
short *endoffsets, *arryfields, *offset;
- prefetchpile_t *head = NULL;
+ prefetchpile_t *head = NULL, *tmp = NULL;
/* Check for the case x.y.z and a.b.c are same oids */
ptr = (char *) node;
endoffsets = GET_PTR_EOFF(ptr, ntuples);
arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
+ if((head = (prefetchpile_t *) calloc(1, sizeof(prefetchpile_t))) == NULL) {
+ printf("Calloc error: %s %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
+
/* Check for redundant tuples by comparing oids of each tuple */
for(i = 0; i < ntuples; i++) {
- if(oid[i] == -1)
+ if(oid[i] == 0){
+ if(head->next != NULL) {
+ if((tmp = (prefetchpile_t *) calloc(1, sizeof(prefetchpile_t))) == NULL) {
+ printf("Calloc error: %s %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
+ tmp->mid = myIpAddr;
+ tmp->next = head;
+ head = tmp;
+ } else {
+ head->mid = myIpAddr;
+ }
continue;
+ }
/* For each tuple make piles */
if ((machinenum = lhashSearch(oid[i])) == 0) {
printf("Error: No such Machine %s, %d\n", __FILE__, __LINE__);
return NULL;
}
/* Insert into machine pile */
- offset = &arryfields[endoffsets[i-1]];
- insertPile(machinenum, oid[i], numoffset[i], offset, head);
+ if(i == 0){
+ offset = &arryfields[0];
+ } else {
+ offset = &arryfields[endoffsets[i-1]];
+ }
+
+ if((head = insertPile(machinenum, oid[i], numoffset[i], offset, head)) == NULL){
+ printf("Error: Couldn't create a pile %s, %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
}
return head;
}
-
-/* This function checks if the oids within the prefetch tuples are available locally.
- * If yes then makes the tuple invalid. If no then rearranges oid and offset values in
- * the prefetchqelem_t node to represent a new prefetch tuple */
prefetchpile_t *foundLocal(prefetchqelem_t *node) {
- int ntuples,i, j, k, oidnfound = 0, index, flag;
+ int ntuples,i, j, k, oidnfound = 0, arryfieldindex,nextarryfieldindex, flag = 0, val;
unsigned int *oid;
unsigned int objoid;
+ int isArray = 0;
char *ptr, *tmp;
objheader_t *objheader;
short *endoffsets, *arryfields;
oid = GET_PTR_OID(ptr);
endoffsets = GET_PTR_EOFF(ptr, ntuples);
arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
+
/* Find offset length for each tuple */
int numoffset[ntuples];//Number of offsets for each tuple
numoffset[0] = endoffsets[0];
numoffset[i] = endoffsets[i] - endoffsets[i-1];
}
for(i = 0; i < ntuples; i++) {
- if(oid[i] == -1)
+ if(oid[i] == 0){
+ if(i == 0) {
+ arryfieldindex = 0;
+ nextarryfieldindex = endoffsets[0];
+ }else {
+ arryfieldindex = endoffsets[i-1];
+ nextarryfieldindex = endoffsets[i];
+ }
+ numoffset[i] = 0;
+ endoffsets[0] = val = numoffset[0];
+ for(k = 1; k < ntuples; k++) {
+ val = val + numoffset[k];
+ endoffsets[k] = val;
+ }
+
+ for(k = 0; k<endoffsets[ntuples-1]; k++) {
+ arryfields[arryfieldindex+k] = arryfields[nextarryfieldindex+k];
+ }
continue;
+ }
/* If object found locally */
if((objheader = (objheader_t*) mhashSearch(oid[i])) != NULL) {
- oidnfound = 0;
tmp = (char *) objheader;
- /* Find the oid of its offset value */
- if(i == 0)
- index = 0;
- else
- index = endoffsets[i - 1];
- for(j = 0 ; j < numoffset[i] ; j++) {
- objoid = *(tmp + sizeof(objheader_t) + arryfields[index]);
- /*If oid found locally then
- *assign the latest oid found as the new oid
- *and copy left over offsets into the arrayoffsetfieldarray*/
+ int orgnumoffset = numoffset[i];
+ if(i == 0) {
+ arryfieldindex = 0;
+ }else {
+ arryfieldindex = endoffsets[i-1];
+ }
+
+ for(j = 0; j<orgnumoffset; j++) {
+ /* Check for arrays */
+ if(TYPE(objheader) > NUMCLASSES) {
+ isArray = 1;
+ }
+ if(isArray == 1) {
+ int elementsize = classsize[TYPE(objheader)];
+ objoid = *((unsigned int *)(tmp + sizeof(objheader_t) + sizeof(struct ArrayObject) + (elementsize*arryfields[arryfieldindex])));
+ } else {
+ objoid = *((unsigned int *)(tmp + sizeof(objheader_t) + arryfields[arryfieldindex]));
+ }
+ //Update numoffset array
+ numoffset[i] = numoffset[i] - 1;
+ //Update oid array
oid[i] = objoid;
- numoffset[i] = numoffset[i] - (j+1);
- for(k = 0; k < numoffset[i]; k++)
- arryfields[endoffsets[j]+ k] = arryfields[endoffsets[j]+k+1];
- index++;
- /*New offset oid not found */
- if((objheader = (objheader_t*) mhashSearch(objoid)) == NULL) {
+ //Update endoffset array
+ endoffsets[0] = val = numoffset[0];
+ for(k = 1; k < ntuples; k++) {
+ val = val + numoffset[k];
+ endoffsets[k] = val;
+ }
+ //Update arrayfields array
+ for(k = 0; k < endoffsets[ntuples-1]; k++) {
+ arryfields[arryfieldindex+k] = arryfields[arryfieldindex+k+1];
+ }
+ if((objheader = (objheader_t*) mhashSearch(oid[i])) == NULL) {
flag = 1;
- checkPreCache(node, numoffset, j, numoffset[i], objoid, index, i, oidnfound);
+ checkPreCache(node, numoffset, oid[i], i);
break;
- } else
- flag = 0;
+ }
+ tmp = (char *) objheader;
+ isArray = 0;
}
-
/*If all offset oids are found locally,make the prefetch tuple invalid */
if(flag == 0) {
- oid[i] = -1;
- numoffset[i] = 0;
+ oid[i] = 0;
}
} else {
- oidnfound = 1;
/* Look in Prefetch cache */
- checkPreCache(node, numoffset, 0, numoffset[i], oid[i], 0, i, oidnfound);
+ checkPreCache(node, numoffset, oid[i],i);
}
-
}
+
/* Make machine groups */
- head = makePreGroups(node, numoffset);
+ if((head = makePreGroups(node, numoffset)) == NULL) {
+ printf("Error in makePreGroups() %s %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
+
return head;
}
+void checkPreCache(prefetchqelem_t *node, int *numoffset, unsigned int objoid, int index) {
+ char *ptr, *tmp;
+ int ntuples, i, k, flag=0, isArray =0, arryfieldindex, val;
+ unsigned int * oid;
+ short *endoffsets, *arryfields;
+ objheader_t *header;
+
+ ptr = (char *) node;
+ ntuples = *(GET_NTUPLES(ptr));
+ oid = GET_PTR_OID(ptr);
+ endoffsets = GET_PTR_EOFF(ptr, ntuples);
+ arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
+
+ if((header = (objheader_t *) prehashSearch(objoid)) == NULL) {
+ return;
+ } else { //Found in Prefetch Cache
+ //TODO Decide if object is too old, if old remove from cache
+ tmp = (char *) header;
+ int loopcount = numoffset[index];
+ if(index == 0)
+ arryfieldindex = 0;
+ else
+ arryfieldindex = endoffsets[(index - 1)];
+ // Check if any of the offset oid is available in the Prefetch cache
+ for(i = 0; i < loopcount; i++) {
+ /* Check for arrays */
+ if(TYPE(header) > NUMCLASSES) {
+ isArray = 1;
+ }
+ if(isArray == 1) {
+ int elementsize = classsize[TYPE(header)];
+ objoid = *((unsigned int *)(tmp + sizeof(objheader_t) + sizeof(struct ArrayObject) + (elementsize*arryfields[arryfieldindex])));
+ } else {
+ objoid = *((unsigned int *)(tmp + sizeof(objheader_t) + arryfields[arryfieldindex]));
+ }
+ //Update numoffset array
+ numoffset[index] = numoffset[index] - 1;
+ //Update oid array
+ oid[index] = objoid;
+ //Update endoffset array
+ endoffsets[0] = val = numoffset[0];
+ for(k = 1; k < ntuples; k++) {
+ val = val + numoffset[k];
+ endoffsets[k] = val;
+ }
+ //Update arrayfields array
+ for(k = 0; k < endoffsets[ntuples-1]; k++) {
+ arryfields[arryfieldindex+k] = arryfields[arryfieldindex+k+1];
+ }
+ if((header = (objheader_t *)prehashSearch(oid[index])) != NULL) {
+ tmp = (char *) header;
+ isArray = 0;
+ } else {
+ flag = 1;
+ break;
+ }
+ }
+ }
+ //Found in the prefetch cache
+ if(flag == 0 && (numoffset[index] == 0)) {
+ oid[index] = 0;
+ }
+}
+
+
+
/* This function is called by the thread calling transPrefetch */
void *transPrefetch(void *t) {
prefetchqelem_t *qnode;
prefetchpile_t *pilehead = NULL;
+ prefetchpile_t *ptr = NULL, *piletail = NULL;
while(1) {
/* lock mutex of primary prefetch queue */
/* dequeue node to create a machine piles and finally unlock mutex */
if((qnode = pre_dequeue()) == NULL) {
printf("Error: No node returned %s, %d\n", __FILE__, __LINE__);
- return NULL;
+ pthread_mutex_unlock(&pqueue.qlock);
+ pthread_exit(NULL);
}
pthread_mutex_unlock(&pqueue.qlock);
+
/* Reduce redundant prefetch requests */
checkPrefetchTuples(qnode);
/* Check if the tuples are found locally, if yes then reduce them further*/
/* and group requests by remote machine ids by calling the makePreGroups() */
- pilehead = foundLocal(qnode);
+ if((pilehead = foundLocal(qnode)) == NULL) {
+ printf("Error: No node created for serving prefetch request %s %d\n", __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+
+ ptr = pilehead;
+ while(ptr != NULL) {
+ if(ptr->next == NULL) {
+ piletail = ptr;
+ }
+ ptr = ptr->next;
+ }
/* Lock mutex of pool queue */
pthread_mutex_lock(&mcqueue.qlock);
/* Update the pool queue with the new remote machine piles generated per prefetch call */
- mcpileenqueue(pilehead);
+ mcpileenqueue(pilehead, piletail);
/* Broadcast signal on machine pile queue */
pthread_cond_broadcast(&mcqueue.qcond);
/* Unlock mutex of machine pile queue */
pthread_mutex_unlock(&mcqueue.qlock);
/* Deallocate the prefetch queue pile node */
predealloc(qnode);
-
}
}
/* Dequeue node to send remote machine connections*/
if((mcpilenode = mcpiledequeue()) == NULL) {
printf("Dequeue Error: No node returned %s %d\n", __FILE__, __LINE__);
- return NULL;
+ pthread_mutex_unlock(&mcqueue.qlock);
+ pthread_exit(NULL);
}
/* Unlock mutex */
pthread_mutex_unlock(&mcqueue.qlock);
/*Initiate connection to remote host and send request */
/* Process Request */
- sendPrefetchReq(mcpilenode, tid);
+ if(mcpilenode->mid != myIpAddr)
+ sendPrefetchReq(mcpilenode);
/* Deallocate the machine queue pile node */
mcdealloc(mcpilenode);
}
}
-void sendPrefetchReq(prefetchpile_t *mcpilenode, int threadid) {
- int sd, i, offset, off, len, endpair, numoffsets, count = 0;
- struct sockaddr_in serv_addr;
- struct hostent *server;
+void sendPrefetchReq(prefetchpile_t *mcpilenode) {
+ int sd, i, off, len, endpair, count = 0;
+ struct sockaddr_in remoteAddr;
char machineip[16], control;
objpile_t *tmp;
-
+ unsigned int mid;
/* Send Trans Prefetch Request */
if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- perror("Error in socket for TRANS_REQUEST\n");
+ perror("Error in socket for SEND_PREFETCH_REQUEST\n");
return;
}
- bzero((char*) &serv_addr, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(LISTEN_PORT);
- //serv_addr.sin_addr.s_addr = inet_addr(MACHINE_IP);
- midtoIP(mcpilenode->mid ,machineip);
- machineip[15] = '\0';
- serv_addr.sin_addr.s_addr = inet_addr(machineip);
+
+ mid = mcpilenode->mid;
+
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
/* Open Connection */
- if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
- perror("Error in connect for TRANS_REQUEST\n");
+ if (connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
+ printf("%s():error %d connecting to %s:%d\n", __func__, errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ close(sd);
return;
}
control = TRANS_PREFETCH;
if(send(sd, &control, sizeof(char), MSG_NOSIGNAL) < sizeof(char)) {
perror("Error in sending prefetch control\n");
+ close(sd);
return;
}
/* Send Oids and offsets in pairs */
tmp = mcpilenode->objpiles;
while(tmp != NULL) {
- off = offset = 0;
+ off = 0;
count++; /* Keeps track of the number of oid and offset tuples sent per remote machine */
- len = sizeof(int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
+ len = sizeof(int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(unsigned short));
char oidnoffset[len];
- memcpy(oidnoffset, &len, sizeof(int));
+ bzero(oidnoffset, len);
+ *((unsigned int*)oidnoffset) = len;
off = sizeof(int);
- memcpy(oidnoffset + off, &tmp->oid, sizeof(unsigned int));
+ *((unsigned int *)((char *)oidnoffset + off)) = tmp->oid;
off += sizeof(unsigned int);
- for(i = 0; i < numoffsets; i++) {
- offset = off + (i * sizeof(short));
- memcpy(oidnoffset + offset, tmp->offset, sizeof(short));
+ for(i = 0; i < tmp->numoffset; i++) {
+ *((unsigned short*)((char *)oidnoffset + off)) = tmp->offset[i];
+ off+=sizeof(unsigned short);
}
- if (send(sd, &oidnoffset, sizeof(oidnoffset),MSG_NOSIGNAL) < sizeof(oidnoffset)) {
+
+ if (send(sd, oidnoffset, len , MSG_NOSIGNAL) < len) {
perror("Error sending fixed bytes for thread\n");
+ close(sd);
return;
}
+
tmp = tmp->next;
}
endpair = -1;
if (send(sd, &endpair, sizeof(int), MSG_NOSIGNAL) < sizeof(int)) {
perror("Error sending fixed bytes for thread\n");
+ close(sd);
return;
}
void getPrefetchResponse(int count, int sd) {
int i = 0, val, n, N, sum, index, objsize;
unsigned int bufsize,oid;
- char buffer[RECEIVE_BUFFER_SIZE], control;
+ char *buffer;
+ char control;
char *ptr;
void *modptr, *oldptr;
if(control == TRANS_PREFETCH_RESPONSE) {
/*For each oid and offset tuple sent as prefetch request to remote machine*/
- while(i < count) {
- /* Clear contents of buffer */
- memset(buffer, 0, RECEIVE_BUFFER_SIZE);
- sum = 0;
- index = 0;
- /* Read the size of buffer to be received */
- if((N = read(sd, buffer, sizeof(unsigned int))) <= 0) {
- perror("Size of buffer not recv\n");
+ while(N = recv((int)sd, &bufsize, sizeof(unsigned int), 0) != 0) {
+ if((buffer = calloc(1, bufsize)) == NULL) {
+ printf("Calloc Error in %s() at %s, %d\n", __func__, __FILE__, __LINE__);
return;
}
- memcpy(&bufsize, buffer, sizeof(unsigned int));
- ptr = buffer + sizeof(unsigned int);
+ sum = 0;
+ index = 0;
+ ptr = buffer;
/* Keep receiving the buffer containing oid info */
do {
n = recv((int)sd, (void *)ptr+sum, bufsize-sum, 0);
sum +=n;
} while(sum < bufsize && n != 0);
+
/* Decode the contents of the buffer */
- index = sizeof(unsigned int);
- while(index < (bufsize - sizeof(unsigned int))) {
+ while(index < bufsize ) {
if(buffer[index] == OBJECT_FOUND) {
/* Increment it to get the object */
index += sizeof(char);
- memcpy(&oid, buffer + index, sizeof(unsigned int));
+ oid = *((unsigned int *)(buffer+index));
index += sizeof(unsigned int);
- /* Lock the Prefetch Cache look up table*/
- pthread_mutex_lock(&pflookup.lock);
/* For each object found add to Prefetch Cache */
- memcpy(&objsize, buffer + index, sizeof(int));
+ objsize = *((int *)(buffer+index));
+ index+=sizeof(int);
+ pthread_mutex_lock(&prefetchcache_mutex);
if ((modptr = objstrAlloc(prefetchcache, objsize)) == NULL) {
- printf("objstrAlloc error for copying into prefetch cache %s, %d\n", __FILE__, __LINE__);
+ printf("Error: objstrAlloc error for copying into prefetch cache %s, %d\n", __FILE__, __LINE__);
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ free(buffer);
return;
}
+ pthread_mutex_unlock(&prefetchcache_mutex);
memcpy(modptr, buffer+index, objsize);
- index += sizeof(int);
+ index += objsize;
/* Insert the oid and its address into the prefetch hash lookup table */
/* Do a version comparison if the oid exists */
if((oldptr = prehashSearch(oid)) != NULL) {
prehashInsert(oid, modptr);
} else if(((objheader_t *)oldptr)->version == ((objheader_t *)modptr)->version) {
/* Add the new object ptr to hash table */
+ prehashRemove(oid);
prehashInsert(oid, modptr);
- } else { /* Do nothing */
+ } else { /* Do nothing: TODO modptr should be reference counted */
;
}
} else {/*If doesn't no match found in hashtable, add the object ptr to hash table*/
prehashInsert(oid, modptr);
}
+ /* Lock the Prefetch Cache look up table*/
+ pthread_mutex_lock(&pflookup.lock);
/* Broadcast signal on prefetch cache condition variable */
pthread_cond_broadcast(&pflookup.cond);
/* Unlock the Prefetch Cache look up table*/
/* Increment it to get the object */
/* TODO: For each object not found query DHT for new location and retrieve the object */
index += sizeof(char);
- memcpy(&oid, buffer + index, sizeof(unsigned int));
+ oid = *((unsigned int *)(buffer + index));
index += sizeof(unsigned int);
/* Throw an error */
printf("OBJECT NOT FOUND.... THIS SHOULD NOT HAPPEN...TERMINATE PROGRAM\n");
exit(-1);
- } else
- printf("Error in decoding the index value %s, %d\n",__FILE__, __LINE__);
+ } else {
+ printf("Error in decoding the index value %d, %s, %d\n",index, __FILE__, __LINE__);
+ free(buffer);
+ return;
+ }
}
-
- i++;
+ free(buffer);
}
} else
printf("Error in receving response for prefetch request %s, %d\n",__FILE__, __LINE__);
unsigned short getObjType(unsigned int oid)
{
objheader_t *objheader;
- unsigned short numoffsets = 0;
+ unsigned short numoffset[] ={0};
+ short fieldoffset[] ={};
if ((objheader = (objheader_t *) mhashSearch(oid)) == NULL)
{
if ((objheader = (objheader_t *) prehashSearch(oid)) == NULL)
{
- prefetch(1, &oid, &numoffsets, NULL);
+ prefetch(1, &oid, numoffset, fieldoffset);
pthread_mutex_lock(&pflookup.lock);
while ((objheader = (objheader_t *) prehashSearch(oid)) == NULL)
+ {
pthread_cond_wait(&pflookup.cond, &pflookup.lock);
+ }
pthread_mutex_unlock(&pflookup.lock);
}
}
return status;
}
+//TODO: when reusing oids, make sure they are not already in use!
+unsigned int getNewOID(void) {
+ static unsigned int id = 0xFFFFFFFF;
+
+ id += 2;
+ if (id > oidMax || id < oidMin)
+ {
+ id = (oidMin | 1);
+ }
+ return id;
+}
+
+int processConfigFile()
+{
+ FILE *configFile;
+ const int maxLineLength = 200;
+ char lineBuffer[maxLineLength];
+ char *token;
+ const char *delimiters = " \t\n";
+ char *commentBegin;
+ in_addr_t tmpAddr;
+
+ configFile = fopen(CONFIG_FILENAME, "r");
+ if (configFile == NULL)
+ {
+ printf("error opening %s:\n", CONFIG_FILENAME);
+ perror("");
+ return -1;
+ }
+
+ numHostsInSystem = 0;
+ sizeOfHostArray = 8;
+ hostIpAddrs = calloc(sizeOfHostArray, sizeof(unsigned int));
+
+ while(fgets(lineBuffer, maxLineLength, configFile) != NULL)
+ {
+ commentBegin = strchr(lineBuffer, '#');
+ if (commentBegin != NULL)
+ *commentBegin = '\0';
+ token = strtok(lineBuffer, delimiters);
+ while (token != NULL)
+ {
+ tmpAddr = inet_addr(token);
+ if ((int)tmpAddr == -1)
+ {
+ printf("error in %s: bad token:%s\n", CONFIG_FILENAME, token);
+ fclose(configFile);
+ return -1;
+ }
+ else
+ addHost(htonl(tmpAddr));
+ token = strtok(NULL, delimiters);
+ }
+ }
+
+ fclose(configFile);
+
+ if (numHostsInSystem < 1)
+ {
+ printf("error in %s: no IP Adresses found\n", CONFIG_FILENAME);
+ return -1;
+ }
+#ifdef MAC
+ myIpAddr = getMyIpAddr("en1");
+#else
+ myIpAddr = getMyIpAddr("eth0");
+#endif
+ myIndexInHostArray = findHost(myIpAddr);
+ if (myIndexInHostArray == -1)
+ {
+ printf("error in %s: IP Address of eth0 not found\n", CONFIG_FILENAME);
+ return -1;
+ }
+ oidsPerBlock = (0xFFFFFFFF / numHostsInSystem) + 1;
+ oidMin = oidsPerBlock * myIndexInHostArray;
+ if (myIndexInHostArray == numHostsInSystem - 1)
+ oidMax = 0xFFFFFFFF;
+ else
+ oidMax = oidsPerBlock * (myIndexInHostArray + 1) - 1;
+
+ return 0;
+}
+
+void addHost(unsigned int hostIp)
+{
+ unsigned int *tmpArray;
+
+ if (findHost(hostIp) != -1)
+ return;
+
+ if (numHostsInSystem == sizeOfHostArray)
+ {
+ tmpArray = calloc(sizeOfHostArray * 2, sizeof(unsigned int));
+ memcpy(tmpArray, hostIpAddrs, sizeof(unsigned int) * numHostsInSystem);
+ free(hostIpAddrs);
+ hostIpAddrs = tmpArray;
+ }
+
+ hostIpAddrs[numHostsInSystem++] = hostIp;
+
+ return;
+}
+
+int findHost(unsigned int hostIp)
+{
+ int i;
+ for (i = 0; i < numHostsInSystem; i++)
+ if (hostIpAddrs[i] == hostIp)
+ return i;
+
+ //not found
+ return -1;
+}
+
+/* This function sends notification request per thread waiting on object(s) whose version
+ * changes */
+int reqNotify(unsigned int *oidarry, unsigned short *versionarry, unsigned int numoid) {
+ int sock,i;
+ objheader_t *objheader;
+ struct sockaddr_in remoteAddr;
+ char msg[1 + numoid * (sizeof(short) + sizeof(unsigned int)) + 3 * sizeof(unsigned int)];
+ char *ptr;
+ int bytesSent;
+ int status, size;
+ unsigned short version;
+ unsigned int oid,mid;
+ static unsigned int threadid = 0;
+ pthread_mutex_t threadnotify = PTHREAD_MUTEX_INITIALIZER; //Lock and condition var for threadjoin and notification
+ pthread_cond_t threadcond = PTHREAD_COND_INITIALIZER;
+ notifydata_t *ndata;
+
+ //FIXME currently all oids belong to one machine
+ oid = oidarry[0];
+ mid = lhashSearch(oid);
+
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0){
+ perror("reqNotify():socket()");
+ return -1;
+ }
+
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
+
+ /* Generate unique threadid */
+ threadid++;
+
+ /* Save threadid, numoid, oidarray, versionarray, pthread_cond_variable for later processing */
+ if((ndata = calloc(1, sizeof(notifydata_t))) == NULL) {
+ printf("Calloc Error %s, %d\n", __FILE__, __LINE__);
+ return -1;
+ }
+ ndata->numoid = numoid;
+ ndata->threadid = threadid;
+ ndata->oidarry = oidarry;
+ ndata->versionarry = versionarry;
+ ndata->threadcond = threadcond;
+ ndata->threadnotify = threadnotify;
+ if((status = notifyhashInsert(threadid, ndata)) != 0) {
+ printf("reqNotify(): Insert into notify hash table not successful %s, %d\n", __FILE__, __LINE__);
+ free(ndata);
+ return -1;
+ }
+
+ /* Send number of oids, oidarry, version array, machine id and threadid */
+ if (connect(sock, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0){
+ printf("reqNotify():error %d connecting to %s:%d\n", errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ free(ndata);
+ return -1;
+ } else {
+ msg[0] = THREAD_NOTIFY_REQUEST;
+ *((unsigned int *)(&msg[1])) = numoid;
+ /* Send array of oids */
+ size = sizeof(unsigned int);
+ {
+ i = 0;
+ while(i < numoid) {
+ oid = oidarry[i];
+ *((unsigned int *)(&msg[1] + size)) = oid;
+ size += sizeof(unsigned int);
+ i++;
+ }
+ }
+
+ /* Send array of version */
+ {
+ i = 0;
+ while(i < numoid) {
+ version = versionarry[i];
+ *((unsigned short *)(&msg[1] + size)) = version;
+ size += sizeof(unsigned short);
+ i++;
+ }
+ }
+
+ *((unsigned int *)(&msg[1] + size)) = myIpAddr;
+ size += sizeof(unsigned int);
+ *((unsigned int *)(&msg[1] + size)) = threadid;
+
+ pthread_mutex_lock(&(ndata->threadnotify));
+ bytesSent = send(sock, msg, 1 + numoid * (sizeof(unsigned int) + sizeof(unsigned short)) + 3 * sizeof(unsigned int) , 0);
+ if (bytesSent < 0){
+ perror("reqNotify():send()");
+ status = -1;
+ } else if (bytesSent != 1 + numoid*(sizeof(unsigned int) + sizeof(unsigned short)) + 3 * sizeof(unsigned int)){
+ printf("reNotify(): error, sent %d bytes %s, %d\n", bytesSent, __FILE__, __LINE__);
+ status = -1;
+ } else {
+ status = 0;
+ }
+
+ pthread_cond_wait(&(ndata->threadcond), &(ndata->threadnotify));
+ pthread_mutex_unlock(&(ndata->threadnotify));
+ }
+
+ pthread_cond_destroy(&threadcond);
+ pthread_mutex_destroy(&threadnotify);
+ free(ndata);
+ close(sock);
+ return status;
+}
+
+void threadNotify(unsigned int oid, unsigned short version, unsigned int tid) {
+ notifydata_t *ndata;
+ int i, objIsFound = 0, index;
+ void *ptr;
+
+ //Look up the tid and call the corresponding pthread_cond_signal
+ if((ndata = notifyhashSearch(tid)) == NULL) {
+ printf("threadnotify(): No such threadid is present %s, %d\n", __FILE__, __LINE__);
+ return;
+ } else {
+ for(i = 0; i < ndata->numoid; i++) {
+ if(ndata->oidarry[i] == oid){
+ objIsFound = 1;
+ index = i;
+ }
+ }
+ if(objIsFound == 0){
+ printf("threadNotify(): Oid not found %s, %d\n", __FILE__, __LINE__);
+ return;
+ } else {
+ if(version <= ndata->versionarry[index]){
+ printf("threadNotify(): New version %d has not changed since last version %s, %d\n", version, __FILE__, __LINE__);
+ return;
+ } else {
+ /* Clear from prefetch cache and free thread related data structure */
+ if((ptr = prehashSearch(oid)) != NULL) {
+ prehashRemove(oid);
+ }
+ pthread_cond_signal(&(ndata->threadcond));
+ }
+ }
+ }
+ return;
+}
+
+int notifyAll(threadlist_t **head, unsigned int oid, unsigned int version) {
+ threadlist_t *ptr;
+ unsigned int mid;
+ struct sockaddr_in remoteAddr;
+ char msg[1 + sizeof(unsigned short) + 2*sizeof(unsigned int)];
+ int sock, status, size, bytesSent;
+
+ while(*head != NULL) {
+ ptr = *head;
+ mid = ptr->mid;
+ //create a socket connection to that machine
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0){
+ perror("notifyAll():socket()");
+ return -1;
+ }
+
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
+ //send Thread Notify response and threadid to that machine
+ if (connect(sock, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0){
+ printf("notifyAll():error %d connecting to %s:%d\n", errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ status = -1;
+ } else {
+ bzero(msg, (1+sizeof(unsigned short) + 2*sizeof(unsigned int)));
+ msg[0] = THREAD_NOTIFY_RESPONSE;
+ *((unsigned int *)&msg[1]) = oid;
+ size = sizeof(unsigned int);
+ *((unsigned short *)(&msg[1]+ size)) = version;
+ size+= sizeof(unsigned short);
+ *((unsigned int *)(&msg[1]+ size)) = ptr->threadid;
+
+ bytesSent = send(sock, msg, (1 + 2*sizeof(unsigned int) + sizeof(unsigned short)), 0);
+ if (bytesSent < 0){
+ perror("notifyAll():send()");
+ status = -1;
+ } else if (bytesSent != 1 + 2*sizeof(unsigned int) + sizeof(unsigned short)){
+ printf("notifyAll(): error, sent %d bytes %s, %d\n",
+ bytesSent, __FILE__, __LINE__);
+ status = -1;
+ } else {
+ status = 0;
+ }
+ }
+ //close socket
+ close(sock);
+ // Update head
+ *head = ptr->next;
+ free(ptr);
+ }
+ return status;
+}
+
+void transAbort(transrecord_t *trans) {
+ objstrDelete(trans->cache);
+ chashDelete(trans->lookupTable);
+ free(trans);
+}
projects / IRC.git / blobdiff