#include "dstm.h"
#include "ip.h"
#include "clookup.h"
+#include "machinepile.h"
#include "mlookup.h"
#include "llookup.h"
#include "plookup.h"
-#include<pthread.h>
-#include<sys/types.h>
-#include<sys/socket.h>
-#include<netdb.h>
-#include<netinet/in.h>
+#include "prelookup.h"
+#include "threadnotify.h"
+#include "queue.h"
+#include "addUdpEnhance.h"
+#include "addPrefetchEnhance.h"
+#include "gCollect.h"
+#ifdef COMPILER
+#include "thread.h"
+#endif
-#define LISTEN_PORT 2156
-#define MACHINE_IP "127.0.0.1"
-#define RECEIVE_BUFFER_SIZE 2048
+#define NUM_THREADS 1
+#define PREFETCH_CACHE_SIZE 1048576 //1MB
+#define CONFIG_FILENAME "dstm.conf"
+/* Global Variables */
extern int classsize[];
+pfcstats_t *evalPrefetch;
+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; /* 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;
-transrecord_t *transStart()
-{
- transrecord_t *tmp = malloc(sizeof(transrecord_t));
- tmp->cache = objstrCreate(1048576);
- tmp->lookupTable = chashCreate(HASH_SIZE, LOADFACTOR);
- return tmp;
-}
-
-objheader_t *transRead(transrecord_t *record, unsigned int oid)
-{
- printf("Enter TRANS_READ\n");
- unsigned int machinenumber;
- objheader_t *tmp, *objheader;
- void *objcopy;
- int size;
- void *buf;
- //check cache
- if((objheader =(objheader_t *)chashSearch(record->lookupTable, oid)) != NULL){
- printf("DEBUG -> transRead oid %d found local\n", oid);
- return(objheader);
- } else if ((objheader = (objheader_t *) mhashSearch(oid)) != NULL) {
- //Look up in Machine lookup table and found
-
- //printf("oid is found in Local machinelookup\n");
- tmp = mhashSearch(oid);
- size = sizeof(objheader_t)+classsize[tmp->type];
- //Copy into cache
- objcopy = objstrAlloc(record->cache, size);
- memcpy(objcopy, (void *)tmp, size);
- //Insert into cache's lookup table
- chashInsert(record->lookupTable, objheader->oid, objcopy);
- return(objcopy);
- } else {
- //Get the object from the remote location
- //printf("oid is found in remote machine\n");
- machinenumber = lhashSearch(oid);
- objcopy = getRemoteObj(record, machinenumber, oid);
- if(objcopy == NULL) {
- //If object is not found in Remote location
- printf("Object not found in Machine %d\n", machinenumber);
- return NULL;
- }
- else
- return(objcopy);
- }
+sockPoolHashTable_t *transReadSockPool;
+sockPoolHashTable_t *transPrefetchSockPool;
+sockPoolHashTable_t *transRequestSockPool;
+pthread_mutex_t notifymutex;
+pthread_mutex_t atomicObjLock;
+
+/***********************************
+ * Global Variables for statistics
+ **********************************/
+int numTransCommit = 0;
+int numTransAbort = 0;
+
+void printhex(unsigned char *, int);
+plistnode_t *createPiles(transrecord_t *);
+
+/*******************************
+ * Send and Recv function calls
+ *******************************/
+void send_data(int fd , void *buf, int buflen) {
+ char *buffer = (char *)(buf);
+ int size = buflen;
+ int numbytes;
+ while (size > 0) {
+ numbytes = send(fd, buffer, size, MSG_NOSIGNAL);
+ if (numbytes == -1) {
+ perror("send");
+ exit(-1);
+ }
+ buffer += numbytes;
+ size -= numbytes;
+ }
}
-objheader_t *transCreateObj(transrecord_t *record, unsigned short type)
-{
- objheader_t *tmp = (objheader_t *) objstrAlloc(record->cache, (sizeof(objheader_t) + classsize[type]));
- tmp->oid = getNewOID();
- tmp->type = type;
- tmp->version = 1;
- tmp->rcount = 0; //? not sure how to handle this yet
- tmp->status = 0;
- tmp->status |= NEW;
- chashInsert(record->lookupTable, tmp->oid, tmp);
- return tmp;
-}
-//int decideResponse(thread_data_array_t *tdata, char *control, int sd) {
-int decideResponse(thread_data_array_t *tdata, int sd, int val) {
- int i, n, N, sum, retval, oidcount = 0;
- int transagree = 0, transdisagree = 0, transsoftabort = 0, transsoftabortmiss = 0;
- char ctrl, control, *ptr;
- unsigned int *oidnotfound;
- objheader_t *header;
-
+void recv_data(int fd , void *buf, int buflen) {
+ char *buffer = (char *)(buf);
+ int size = buflen;
+ int numbytes;
+ while (size > 0) {
+ numbytes = recv(fd, buffer, size, 0);
+ if (numbytes == -1) {
+ perror("recv");
+ exit(-1);
+ }
+ buffer += numbytes;
+ size -= numbytes;
+ }
+}
- //Check common data structure
- for (i = 0 ; i < tdata->pilecount ; i++) {
- //Switch case
- control = tdata->recvmsg[i].rcv_status;
- switch(control) {
- case TRANS_DISAGREE:
- printf("DEBUG-> Inside TRANS_DISAGREE\n");
- transdisagree++;
- //Free transaction records
- objstrDelete(tdata->rec->cache);
- chashDelete(tdata->rec->lookupTable);
- free(tdata->rec);
- //send Abort
- ctrl = TRANS_ABORT;
- for (i = 0 ; i < tdata->pilecount ; i++) { //send writes to all machine groups involved
- if (write(sd, &ctrl, sizeof(char)) < 0) {
- perror("Error sending ctrl message for participant\n");
- return 1;
- }
- }
- return 0;
-
- case TRANS_AGREE:
- printf("DEBUG-> Inside TRANS_AGREE\n");
- transagree++;
- break;
-
- case TRANS_SOFT_ABORT:
- printf("DEBUG-> Inside TRANS_SOFT_ABORT\n");
- transsoftabort++;
- /* Do a socket read only if TRANS_SOFT_ABORT was meant for this thread */
- if ((i == tdata->thread_id) && (val == 0)) {
- //Read list of objects missing
- if(read(sd, &oidcount, sizeof(int)) != 0) {
- //Break if only objs are locked at the Participant side
- if (oidcount == 0) {
- break;
- }
- transsoftabortmiss++;
- N = oidcount * sizeof(unsigned int);
- if((oidnotfound = calloc(oidcount, sizeof(unsigned int))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- }
- ptr = (char *) oidnotfound;
- do {
- n = read(sd, ptr+sum, N-sum);
- sum += n;
- } while(sum < N && n !=0);
- }
- }
+int recv_data_errorcode(int fd , void *buf, int buflen) {
+ char *buffer = (char *)(buf);
+ int size = buflen;
+ int numbytes;
+ while (size > 0) {
+ numbytes = recv(fd, buffer, size, 0);
+ if (numbytes==0)
+ return 0;
+ if (numbytes == -1) {
+ perror("recv");
+ return -1;
+ }
+ buffer += numbytes;
+ size -= numbytes;
+ }
+ return 1;
+}
- break;
- default:
- printf("Participant sent unknown message\n");
- }
- }
-
- //Decide what control message to send to Participant
- if(transagree == tdata->pilecount){
- //Send Commit
- ctrl = TRANS_COMMIT;
- printf("Sending TRANS_COMMIT\n");
- if((retval = write(sd, &ctrl, sizeof(char))) < 0) {
- perror("Error sending ctrl message for participant\n");
- return 1;
- }
- //printf("Sending control %d ,sd = %d\n", ctrl, i, sd);
- }
+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;
+}
- if(transsoftabort > 0 && transdisagree == 0 && transsoftabortmiss == 0) {
- //Send abort but retry commit
- ctrl = TRANS_ABORT_BUT_RETRY_COMMIT;
- printf("Sending TRANS_ABORT_BUT_RETRY_COMMIT\n");
- if((retval = write(sd, &ctrl, sizeof(char))) <= 0) {
- perror("Error sending ctrl message for participant\n");
- return 1;
- }
- //Sleep and the resend the request
- sleep(5);
- //Read new control message from Participant
+inline int arrayLength(int *array) {
+ int i;
+ for(i=0 ;array[i] != -1; i++)
+ ;
+ return i;
+}
- if((n = read(sd, &control, sizeof(char))) <= 0) {
- perror("No bytes are read for participant\n");
- return 1;
- }
-
- //Update common data structure and increment count
- tdata->recvmsg[tdata->thread_id].rcv_status = control;
- val = 1;
- decideResponse(tdata, sd, val); //Second call to decideResponse(); indicated by parameter val = 1
- }
+inline int findmax(int *array, int arraylength) {
+ int max, i;
+ max = array[0];
+ for(i = 0; i < arraylength; i++){
+ if(array[i] > max) {
+ max = array[i];
+ }
+ }
+ return max;
+}
- if(transsoftabort > 0 && transsoftabortmiss > 0 && transdisagree == 0) {
- //Send abort but retry commit after relooking up objects
- ctrl = TRANS_ABORT;
- printf("Sending TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING\n");
- if((retval = write(sd, &ctrl, sizeof(char))) < 0) {
- perror("Error sending ctrl message for participant\n");
- return 1;
- }
- //TODO
- //Relook up objects
- //update location table
-
- //Free pointers
- free(oidnotfound);
- }
-
- return 0;
+/* This function is a prefetch call generated by the compiler that
+ * populates the shared primary prefetch queue*/
+void prefetch(int siteid, int ntuples, unsigned int *oids, unsigned short *endoffsets, short *arrayfields) {
+ /* Allocate for the queue node*/
+ int qnodesize = 2*sizeof(int) + ntuples * (sizeof(unsigned short) + sizeof(unsigned int)) + endoffsets[ntuples - 1] * sizeof(short);
+ char * node= getmemory(qnodesize);
+ /* Set queue node values */
+ int len;
+ int top=endoffsets[ntuples-1];
+
+ /* TODO: Remove this after testing */
+ evalPrefetch[siteid].callcount++;
+
+ *((int *)(node))=siteid;
+ *((int *)(node + sizeof(int))) = ntuples;
+ len = 2*sizeof(int);
+ memcpy(node+len, oids, ntuples*sizeof(unsigned int));
+ memcpy(node+len+ntuples*sizeof(unsigned int), endoffsets, ntuples*sizeof(unsigned short));
+ memcpy(node+len+ntuples*(sizeof(unsigned int)+sizeof(short)), arrayfields, top*sizeof(short));
+
+ /* Lock and insert into primary prefetch queue */
+ movehead(qnodesize);
}
-void *transRequest(void *threadarg) {
- int sd, i, n;
- struct sockaddr_in serv_addr;
- struct hostent *server;
- thread_data_array_t *tdata;
- objheader_t *headeraddr;
- //unsigned int *oidnotfound;
- char buffer[RECEIVE_BUFFER_SIZE], control, recvcontrol;
- char machineip[16];
-
- 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");
- 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(tdata->mid,machineip);
- machineip[15] = '\0';
- serv_addr.sin_addr.s_addr = inet_addr(machineip);
-
- if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
- perror("Error in connect for TRANS_REQUEST");
- return NULL;
- }
+/* This function starts up the transaction runtime. */
+int dstmStartup(const char * option) {
+ pthread_t thread_Listen, udp_thread_Listen;
+ pthread_attr_t attr;
+ int master=option!=NULL && strcmp(option, "master")==0;
+ int fd;
+ int udpfd;
+
+ if (processConfigFile() != 0)
+ return 0; //TODO: return error value, cause main program to exit
+#ifdef COMPILER
+ if (!master)
+ threadcount--;
+#endif
+
+#ifdef TRANSSTATS
+ printf("Trans stats is on\n");
+ fflush(stdout);
+#endif
+
+ //Initialize socket pool
+ transReadSockPool = createSockPool(transReadSockPool, 2*numHostsInSystem+1);
+ transPrefetchSockPool = createSockPool(transPrefetchSockPool, 2*numHostsInSystem+1);
+ transRequestSockPool = createSockPool(transRequestSockPool, 2*numHostsInSystem+1);
+
+ dstmInit();
+ transInit();
+
+ fd=startlistening();
+ udpfd = udpInit();
+ pthread_create(&udp_thread_Listen, &attr, udpListenBroadcast, (void*)udpfd);
+ if (master) {
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ pthread_create(&thread_Listen, &attr, dstmListen, (void*)fd);
+ return 1;
+ } else {
+ dstmListen((void *)fd);
+ 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 and the prefetch thread to
+ * process the prefetch call Call from compiler populates the shared
+ * queue with prefetch requests while prefetch thread processes the
+ * prefetch requests */
+
+void transInit() {
+ int t, rc;
+ int retval;
+ //Create and initialize prefetch cache structure
+ prefetchcache = objstrCreate(PREFETCH_CACHE_SIZE);
+ initializePCache();
+ if((evalPrefetch = initPrefetchStats()) == NULL) {
+ printf("%s() Error allocating memory at %s, %d\n", __func__, __FILE__, __LINE__);
+ exit(0);
+ }
+
+ /* 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);
+
+ pthread_mutex_init(¬ifymutex, NULL);
+ pthread_mutex_init(&atomicObjLock, NULL);
+ //Create prefetch cache lookup table
+ if(prehashCreate(HASH_SIZE, LOADFACTOR)) {
+ printf("ERROR\n");
+ return; //Failure
+ }
+
+ //Initialize primary shared queue
+ queueInit();
+ //Initialize machine pile w/prefetch oids and offsets shared queue
+ mcpileqInit();
+
+ //Create the primary prefetch thread
+ do {
+ retval=pthread_create(&tPrefetch, NULL, transPrefetch, NULL);
+ } while(retval!=0);
+ pthread_detach(tPrefetch);
+}
- //Multiple writes for sending packets of data
- //Send first few fixed bytes of the TRANS_REQUEST protocol
- printf("DEBUG -> Start sending commit data... %d\n", tdata->buffer->f.control);
-// printf("DEBUG-> Bytes sent in first write: %d\n", sizeof(fixed_data_t));
-// printf("Machine count = %d\tnumread = %d\tnummod = %d\tsum_bytes = %d\n", tdata->buffer->f.mcount, tdata->buffer->f.numread, tdata->buffer->f.nummod, tdata->buffer->f.sum_bytes);
- if (write(sd, &(tdata->buffer->f), (sizeof(fixed_data_t))) < 0) {
- perror("Error sending fixed bytes for thread");
- return NULL;
+/* This function stops the threads spawned */
+void transExit() {
+ int t;
+ pthread_cancel(tPrefetch);
+ for(t = 0; t < NUM_THREADS; t++)
+ pthread_cancel(wthreads[t]);
+
+ return;
+}
+
+/* This functions inserts randowm wait delays in the order of msec
+ * Mostly used when transaction commits retry*/
+void randomdelay() {
+ 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, NULL);
+ return;
+}
+
+/* This function initializes things required in the transaction start*/
+transrecord_t *transStart() {
+ transrecord_t *tmp;
+ if((tmp = calloc(1, sizeof(transrecord_t))) == NULL){
+ printf("%s() Calloc error at line %d, %s\n", __func__, __LINE__, __FILE__);
+ return NULL;
+ }
+ tmp->cache = objstrCreate(1048576);
+ tmp->lookupTable = chashCreate(HASH_SIZE, LOADFACTOR);
+#ifdef COMPILER
+ tmp->revertlist=NULL;
+#endif
+ return tmp;
+}
+
+/* This function finds the location of the objects involved in a transaction
+ * and returns the pointer to the object if found in a remote location */
+objheader_t *transRead(transrecord_t *record, unsigned int oid) {
+ unsigned int machinenumber;
+ objheader_t *tmp, *objheader;
+ objheader_t *objcopy;
+ int size, found = 0;
+ void *buf;
+
+ if(oid == 0) {
+ return NULL;
+ }
+
+ if((objheader = (objheader_t *)chashSearch(record->lookupTable, oid)) != NULL){
+ /* Search local transaction cache */
+#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*/
+ GETSIZE(size, objheader);
+ size += sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(record->cache, size);
+ memcpy(objcopy, objheader, size);
+ /* Insert into cache's lookup table */
+ STATUS(objcopy)=0;
+ chashInsert(record->lookupTable, OID(objheader), objcopy);
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ } else if((tmp = (objheader_t *) prehashSearch(oid)) != NULL) {
+ /* Look up in prefetch cache */
+ 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);
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ } else {
+ /* Get the object from the remote location */
+ if((machinenumber = lhashSearch(oid)) == 0) {
+ printf("Error: %s() No machine found for oid =% %s,%dx\n",__func__, machinenumber, __FILE__, __LINE__);
+ return NULL;
+ }
+ objcopy = getRemoteObj(record, machinenumber, oid);
+
+ if(objcopy == NULL) {
+ printf("Error: Object not found in Remote location %s, %d\n", __FILE__, __LINE__);
+ return NULL;
+ } else {
+ STATUS(objcopy)=0;
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ }
+ }
+}
+
+/* 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);
+
+#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
+ * transaction commit request */
+plistnode_t *createPiles(transrecord_t *record) {
+ int i;
+ plistnode_t *pile = NULL;
+ unsigned int machinenum;
+ objheader_t *headeraddr;
+ chashlistnode_t * ptr = record->lookupTable->table;
+ /* Represents number of bins in the chash table */
+ unsigned int size = record->lookupTable->size;
+
+ for(i = 0; i < size ; i++) {
+ chashlistnode_t * curr = &ptr[i];
+ /* Inner loop to traverse the linked list of the cache lookupTable */
+ while(curr != NULL) {
+ //if the first bin in hash table is empty
+ if(curr->key == 0)
+ break;
+
+ if ((headeraddr = chashSearch(record->lookupTable, curr->key)) == NULL) {
+ printf("Error: No such oid %s, %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
+
+ //Get machine location for object id (and whether local or not)
+ 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__);
+ return NULL;
+ }
+
+ //Make machine groups
+ pile = pInsert(pile, headeraddr, machinenum, record->lookupTable->numelements);
+ curr = curr->next;
+ }
+ }
+ return pile;
+}
+
+/* This function initiates the transaction commit process
+ * Spawns threads for each of the new connections with Participants
+ * and creates new piles by calling the createPiles(),
+ * Sends a transrequest() to each remote machines for objects found remotely
+ * and calls handleLocalReq() to process objects found locally */
+int transCommit(transrecord_t *record) {
+ unsigned int tot_bytes_mod, *listmid;
+ plistnode_t *pile, *pile_ptr;
+ int i, j, rc, val;
+ int pilecount, offset, threadnum, trecvcount;
+ char control;
+ char transid[TID_LEN];
+ trans_req_data_t *tosend;
+ trans_commit_data_t transinfo;
+ static int newtid = 0;
+ char treplyctrl, treplyretry; /* keeps track of the common response that needs to be sent */
+ thread_data_array_t *thread_data_array;
+ local_thread_data_array_t *ltdata;
+ int firsttime=1;
+
+ do {
+ treplyctrl=0;
+ trecvcount = 0;
+ threadnum = 0;
+ treplyretry = 0;
+ thread_data_array = NULL;
+ ltdata = NULL;
+
+ /* Look through all the objects in the transaction record and make piles
+ * for each machine involved in the transaction*/
+ if (firsttime)
+ pile_ptr = pile = createPiles(record);
+ else
+ pile=pile_ptr;
+ firsttime=0;
+
+ /* Create the packet to be sent in TRANS_REQUEST */
+
+ /* Count the number of participants */
+ pilecount = pCount(pile);
+
+ /* Create a list of machine ids(Participants) involved in transaction */
+ listmid = calloc(pilecount, sizeof(unsigned int));
+ 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 = (thread_data_array_t *) calloc(pilecount, sizeof(thread_data_array_t));
+ ltdata = calloc(1, sizeof(local_thread_data_array_t));
+
+ 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++;
+ tosend = calloc(1, sizeof(trans_req_data_t));
+ 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;
+ thread_data_array[threadnum].pilehead = pile_ptr;
+ /* 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;
}
- //Send list of machines involved in the transaction
-// printf("DEBUG-> Bytes sent in second write: %d\n", sizeof(unsigned int) * tdata->pilecount);
- if (write(sd, tdata->buffer->listmid, (sizeof(unsigned int) * tdata->pilecount )) < 0) {
- perror("Error sending list of machines for thread");
- return NULL;
+ } 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;
}
- //Send oids and version number tuples for objects that are read
-// printf("DEBUG-> Bytes sent in the third write: %d\n", (sizeof(unsigned int) + sizeof(short)) * tdata->buffer->f.numread);
-// printf(" DEBUG->Read oids are %d %d %d %d\n", *(tdata->buffer->objread), *(tdata->buffer->objread + 6), *(tdata->buffer->objread + 12), *(tdata->buffer->objread +18));
- if (write(sd, tdata->buffer->objread, ((sizeof(unsigned int) + sizeof(short)) * tdata->buffer->f.numread )) < 0) {
- perror("Error sending tuples for thread");
- return NULL;
+ }
+
+ 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);
+ }
+ return 1;
}
- //Send objects that are modified
- for(i = 0; i < tdata->buffer->f.nummod ; i++) {
- headeraddr = chashSearch(tdata->rec->lookupTable, tdata->buffer->oidmod[i]);
- if (write(sd, headeraddr, sizeof(objheader_t) + classsize[headeraddr->type]) < 0) {
- perror("Error sending obj modified for thread");
- return NULL;
- }
+ free(thread_data_array[i].buffer);
+ }
+
+ /* Free resources */
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ free(listmid);
+
+ if (!treplyretry)
+ pDelete(pile_ptr);
+
+ /* wait a random amount of time before retrying to commit transaction*/
+ if(treplyretry) {
+ free(thread_data_array);
+ free(ltdata);
+ randomdelay();
+ }
+
+ /* Retry trans commit procedure during soft_abort case */
+ } while (treplyretry);
+
+ if(treplyctrl == TRANS_ABORT) {
+#ifdef TRANSSTATS
+ numTransAbort++;
+#endif
+ /* Free Resources */
+ objstrDelete(record->cache);
+ chashDelete(record->lookupTable);
+ free(record);
+ free(thread_data_array);
+ free(ltdata);
+ return TRANS_ABORT;
+ } else if(treplyctrl == TRANS_COMMIT) {
+#ifdef TRANSSTATS
+ numTransCommit++;
+#endif
+ /* Free Resources */
+ objstrDelete(record->cache);
+ chashDelete(record->lookupTable);
+ free(record);
+ free(thread_data_array);
+ free(ltdata);
+ return 0;
+ } else {
+ //TODO Add other cases
+ printf("Error: in %s() THIS SHOULD NOT HAPPEN.....EXIT PROGRAM\n", __func__);
+ exit(-1);
+ }
+ return 0;
+}
+
+/* This function sends information involved in the transaction request
+ * to participants and accepts a response from particpants.
+ * It calls decideresponse() to decide on what control message
+ * to send next to participants and sends the message using sendResponse()*/
+void *transRequest(void *threadarg) {
+ int sd, i, n;
+ struct sockaddr_in serv_addr;
+ thread_data_array_t *tdata;
+ objheader_t *headeraddr;
+ char control, recvcontrol;
+ char machineip[16], retval;
+
+ tdata = (thread_data_array_t *) threadarg;
+
+ if((sd = getSock2WithLock(transRequestSockPool, tdata->mid)) < 0) {
+ printf("transRequest(): socket create error\n");
+ pthread_exit(NULL);
+ }
+
+ /* Send bytes of data with TRANS_REQUEST control message */
+ send_data(sd, &(tdata->buffer->f), sizeof(fixed_data_t));
+
+ /* Send list of machines involved in the transaction */
+ {
+ int size=sizeof(unsigned int)*tdata->buffer->f.mcount;
+ send_data(sd, tdata->buffer->listmid, size);
+ }
+
+ /* Send oids and version number tuples for objects that are read */
+ {
+ int size=(sizeof(unsigned int)+sizeof(unsigned short))*tdata->buffer->f.numread;
+ send_data(sd, tdata->buffer->objread, size);
+ }
+
+ /* 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]);
+ GETSIZE(size,headeraddr);
+ size+=sizeof(objheader_t);
+ send_data(sd, headeraddr, size);
+ }
+
+ /* Read control message from Participant */
+ recv_data(sd, &control, sizeof(char));
+ /* Recv Objects if participant sends TRANS_DISAGREE */
+ if(control == TRANS_DISAGREE) {
+ int length;
+ recv_data(sd, &length, sizeof(int));
+ void *newAddr;
+ pthread_mutex_lock(&prefetchcache_mutex);
+ if ((newAddr = prefetchobjstrAlloc((unsigned int)length)) == NULL) {
+ printf("Error: %s() objstrAlloc error for copying into prefetch cache %s, %d\n", __func__, __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ recv_data(sd, newAddr, length);
+ int offset = 0;
+ while(length != 0) {
+ unsigned int oidToPrefetch;
+ objheader_t * header;
+ header = (objheader_t *) (((char *)newAddr) + offset);
+ oidToPrefetch = OID(header);
+ int size = 0;
+ GETSIZE(size, header);
+ size += sizeof(objheader_t);
+ //make an entry in prefetch hash table
+ void *oldptr;
+ if((oldptr = prehashSearch(oidToPrefetch)) != NULL) {
+ prehashRemove(oidToPrefetch);
+ prehashInsert(oidToPrefetch, header);
+ } else {
+ prehashInsert(oidToPrefetch, header);
+ }
+ length = length - size;
+ offset += size;
+ }
+ }
+ recvcontrol = control;
+ /* Update common data structure and increment count */
+ tdata->recvmsg[tdata->thread_id].rcv_status = recvcontrol;
+
+ /* Lock and update count */
+ /* Thread sleeps until all messages from pariticipants are received by coordinator */
+ pthread_mutex_lock(tdata->lock);
+
+ (*(tdata->count))++; /* keeps track of no of messages received by the coordinator */
+
+ /* Wake up the threads and invoke decideResponse (once) */
+ if(*(tdata->count) == tdata->buffer->f.mcount) {
+ decideResponse(tdata);
+ pthread_cond_broadcast(tdata->threshold);
+ } else {
+ pthread_cond_wait(tdata->threshold, tdata->lock);
+ }
+ pthread_mutex_unlock(tdata->lock);
+
+ /* Send the final response such as TRANS_COMMIT or TRANS_ABORT
+ * to all participants in their respective socket */
+ if (sendResponse(tdata, sd) == 0) {
+ printf("sendResponse returned error %s,%d\n", __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+
+ recv_data((int)sd, &control, 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);
+ }
+ pthread_exit(NULL);
+}
+
+/* This function decides the reponse that needs to be sent to
+ * all Participant machines after the TRANS_REQUEST protocol */
+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->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_AGREE:
+ transagree++;
+ break;
+
+ case TRANS_SOFT_ABORT:
+ transsoftabort++;
+ break;
+ }
+ }
+
+ if(transdisagree > 0) {
+ /* Send Abort */
+ *(tdata->replyctrl) = TRANS_ABORT;
+ *(tdata->replyretry) = 0;
+ /* clear objects from prefetch cache */
+ cleanPCache(tdata);
+ } else if(transagree == tdata->buffer->f.mcount){
+ /* Send Commit */
+ *(tdata->replyctrl) = TRANS_COMMIT;
+ *(tdata->replyretry) = 0;
+ int retval;
+ if((retval = updatePrefetchCache(tdata)) != 0) {
+ printf("Error: %s() in updating prefetch cache %s, %d\n", __func__, __FILE__, __LINE__);
+ return;
+ }
+
+ /* Invalidate objects in other machine cache */
+ if(tdata->buffer->f.nummod > 0) {
+ if((retval = invalidateObj(tdata)) != 0) {
+ printf("Error: %s() in invalidating Objects %s, %d\n", __func__, __FILE__, __LINE__);
+ return;
+ }
+ }
+ } else {
+ /* Send Abort in soft abort case followed by retry commiting transaction again*/
+ *(tdata->replyctrl) = TRANS_ABORT;
+ *(tdata->replyretry) = 1;
+ }
+ return;
+}
+
+/* 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, size, sum, oidcount = 0, control;
+ char *ptr, retval = 0;
+ unsigned int *oidnotfound;
+
+ control = *(tdata->replyctrl);
+ send_data(sd, &control, sizeof(char));
+
+ //TODO read missing objects during object migration
+ /* If response is a soft abort due to missing objects at the
+ Participant's side */
+
+ /* 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 */
+ retval = TRANS_COMMIT;
+ }
+
+ 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. */
+
+void *getRemoteObj(transrecord_t *record, unsigned int mnum, unsigned int oid) {
+ int size, val;
+ struct sockaddr_in serv_addr;
+ char machineip[16];
+ char control;
+ objheader_t *h;
+ void *objcopy = NULL;
+
+ int sd = getSock2(transReadSockPool, mnum);
+ char readrequest[sizeof(char)+sizeof(unsigned int)];
+ readrequest[0] = READ_REQUEST;
+ *((unsigned int *)(&readrequest[1])) = oid;
+ send_data(sd, readrequest, sizeof(readrequest));
+
+ /* Read response from the Participant */
+ recv_data(sd, &control, sizeof(char));
+
+ if (control==OBJECT_NOT_FOUND) {
+ objcopy = NULL;
+ } else {
+ /* Read object if found into local cache */
+ recv_data(sd, &size, sizeof(int));
+ objcopy = objstrAlloc(record->cache, size);
+ recv_data(sd, objcopy, size);
+ /* Insert into cache's lookup table */
+ chashInsert(record->lookupTable, oid, objcopy);
+ }
+
+ return objcopy;
+}
+
+/* This function handles the local objects involved in a transaction
+ * commiting process. It also makes a decision if this local machine
+ * sends AGREE or DISAGREE or SOFT_ABORT to coordinator. Note
+ * Coordinator = local machine It wakes up the other threads from
+ * remote participants that are waiting for the coordinator's decision
+ * and based on common agreement it either commits or aborts the
+ * transaction. It also frees the memory resources */
+
+void *handleLocalReq(void *threadarg) {
+ unsigned int *oidnotfound = NULL, *oidlocked = NULL;
+ local_thread_data_array_t *localtdata;
+ int numoidnotfound = 0, numoidlocked = 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));
+
+ 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) {
+ int incr = sizeof(unsigned int) + sizeof(unsigned short);// Offset that points to next position in the objread array
+ incr *= i;
+ oid = *((unsigned int *)(((char *)localtdata->tdata->buffer->objread) + incr));
+ version = *((unsigned 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;
+ }
+ /* 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 */
+ /* Save the oids not found and number of oids not found for later use */
+ oidnotfound[numoidnotfound] = oid;
+ numoidnotfound++;
+ } else { /* If Obj found in machine (i.e. has not moved) */
+ /* Check if Obj is locked by any previous transaction */
+ if (test_and_set(STATUSPTR(mobj))) {
+ if (version == ((objheader_t *)mobj)->version) { /* If locked then match versions */
+ v_matchlock++;
+ } else {/* If versions don't match ...HARD ABORT */
+ v_nomatch++;
+ /* Send TRANS_DISAGREE to Coordinator */
+ localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_DISAGREE;
+ }
+ } else {
+ //we're locked
+ /* Save all object oids that are locked on this machine during this transaction request call */
+ oidlocked[numoidlocked] = OID(((objheader_t *)mobj));
+ numoidlocked++;
+ if (version == ((objheader_t *)mobj)->version) { /* Check if versions match */
+ v_matchnolock++;
+ } else { /* If versions don't match ...HARD ABORT */
+ v_nomatch++;
+ /* Send TRANS_DISAGREE to Coordinator */
+ localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_DISAGREE;
+ }
+ }
+ }
+ } // 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) || (numoidnotfound > 0 && v_nomatch == 0)) {
+ localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_SOFT_ABORT;
+ }
+
+ /* 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 = NULL;
+ localtdata->transinfo->numlocked = numoidlocked;
+ localtdata->transinfo->numnotfound = numoidnotfound;
+ /* 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->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);
+ if(*(localtdata->tdata->replyctrl) == TRANS_ABORT){
+ if(transAbortProcess(localtdata) != 0) {
+ printf("Error in transAbortProcess() %s,%d\n", __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+ } else if(*(localtdata->tdata->replyctrl) == TRANS_COMMIT) {
+ if(transComProcess(localtdata) != 0) {
+ printf("Error in transComProcess() %s,%d\n", __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+ }
+ /* Free memory */
+ if (localtdata->transinfo->objlocked != NULL) {
+ free(localtdata->transinfo->objlocked);
+ }
+ if (localtdata->transinfo->objnotfound != NULL) {
+ free(localtdata->transinfo->objnotfound);
+ }
+
+ pthread_exit(NULL);
+}
+
+/* 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;
+
+ 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;
+ }
+ UnLock(STATUSPTR(header));
+ }
+
+ return 0;
+}
+
+/*This function completes the COMMIT process if 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("Error: transComProcess() mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ /* 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);
+ char *tmptcptr = (char *) tcptr;
+ memcpy((char*)header+sizeof(objheader_t), (char *)tmptcptr+ sizeof(objheader_t), tmpsize);
+ header->version += 1;
+ if(header->notifylist != NULL) {
+ notifyAll(&header->notifylist, OID(header), header->version);
+ }
+ }
+ /* 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 for oid = %x at %s, %d\n", oidcreated[i], __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(oidlocked[i])) == NULL) {
+ printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ UnLock(STATUSPTR(header));
+ }
+
+ return 0;
+}
+
+prefetchpile_t *foundLocal(char *ptr) {
+ int siteid = *(GET_SITEID(ptr));
+ int ntuples = *(GET_NTUPLES(ptr));
+ unsigned int * oidarray = GET_PTR_OID(ptr);
+ unsigned short * endoffsets = GET_PTR_EOFF(ptr, ntuples);
+ short * arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
+ prefetchpile_t * head=NULL;
+ int numLocal = 0;
+
+ int i;
+ for(i=0;i<ntuples; i++) {
+ unsigned short baseindex=(i==0)?0:endoffsets[i-1];
+ unsigned short endindex=endoffsets[i];
+ unsigned int oid=oidarray[i];
+ int newbase;
+ int machinenum;
+ if (oid==0)
+ continue;
+ //Look up fields locally
+ for(newbase=baseindex;newbase<endindex;newbase++) {
+ if (!lookupObject(&oid, arryfields[newbase]))
+ break;
+ //Ended in a null pointer...
+ if (oid==0)
+ goto tuple;
+ }
+ //Entire prefetch is local
+ if (newbase==endindex&&checkoid(oid)){
+ numLocal++;
+ goto tuple;
+ }
+ //Add to remote requests
+ machinenum=lhashSearch(oid);
+ insertPile(machinenum, oid, endindex-newbase, &arryfields[newbase], &head);
+ tuple:
+ ;
+ }
+
+ /* handle dynamic prefetching */
+ handleDynPrefetching(numLocal, ntuples, siteid);
+ return head;
+}
+
+int checkoid(unsigned int oid) {
+ objheader_t *header;
+ if ((header=mhashSearch(oid))!=NULL) {
+ //Found on machine
+ return 1;
+ } else if ((header=prehashSearch(oid))!=NULL) {
+ //Found in cache
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int lookupObject(unsigned int * oid, short offset) {
+ objheader_t *header;
+ if ((header=mhashSearch(*oid))!=NULL) {
+ //Found on machine
+ ;
+ } else if ((header=prehashSearch(*oid))!=NULL) {
+ //Found in cache
+ ;
+ } else {
+ return 0;
+ }
+
+ if(TYPE(header) > NUMCLASSES) {
+ int elementsize = classsize[TYPE(header)];
+ struct ArrayObject *ao = (struct ArrayObject *) (((char *)header) + sizeof(objheader_t));
+ int length = ao->___length___;
+ /* Check if array out of bounds */
+ if(offset < 0 || offset >= length) {
+ //if yes treat the object as found
+ (*oid)=0;
+ return 1;
+ }
+ (*oid) = *((unsigned int *)(((char *)ao) + sizeof(struct ArrayObject) + (elementsize*offset)));
+ return 1;
+ } else {
+ (*oid) = *((unsigned int *)(((char *)header) + sizeof(objheader_t) + offset));
+ return 1;
+ }
+}
+
+
+/* This function is called by the thread calling transPrefetch */
+void *transPrefetch(void *t) {
+ while(1) {
+ /* lock mutex of primary prefetch queue */
+ void *node=gettail();
+ /* Check if the tuples are found locally, if yes then reduce them further*/
+ /* and group requests by remote machine ids by calling the makePreGroups() */
+ prefetchpile_t *pilehead = foundLocal(node);
+
+ if (pilehead!=NULL) {
+ // Get sock from shared pool
+ int sd = getSock2(transPrefetchSockPool, pilehead->mid);
+
+ /* Send Prefetch Request */
+ prefetchpile_t *ptr = pilehead;
+ while(ptr != NULL) {
+ sendPrefetchReq(ptr, sd);
+ ptr = ptr->next;
+ }
+
+ /* Release socket */
+ // freeSock(transPrefetchSockPool, pilehead->mid, sd);
+
+ /* Deallocated pilehead */
+ mcdealloc(pilehead);
+ }
+ // Deallocate the prefetch queue pile node
+ inctail();
+ }
+}
+
+void sendPrefetchReqnew(prefetchpile_t *mcpilenode, int sd) {
+ objpile_t *tmp;
+
+ int size=sizeof(char)+sizeof(int);
+ for(tmp=mcpilenode->objpiles;tmp!=NULL;tmp=tmp->next) {
+ size += sizeof(int) + sizeof(unsigned int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
+ }
+
+ char buft[size];
+ char *buf=buft;
+ *buf=TRANS_PREFETCH;
+ buf+=sizeof(char);
+
+ for(tmp=mcpilenode->objpiles;tmp!=NULL;tmp=tmp->next) {
+ int len = sizeof(int) + sizeof(unsigned int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
+ *((int*)buf)=len;
+ buf+=sizeof(int);
+ *((unsigned int *)buf)=tmp->oid;
+ buf+=sizeof(unsigned int);
+ *((unsigned int *)(buf)) = myIpAddr;
+ buf+=sizeof(unsigned int);
+ memcpy(buf, tmp->offset, tmp->numoffset*sizeof(short));
+ buf+=tmp->numoffset*sizeof(short);
+ }
+ *((int *)buf)=-1;
+ send_data(sd, buft, size);
+ return;
+}
+
+void sendPrefetchReq(prefetchpile_t *mcpilenode, int sd) {
+ int len, endpair;
+ char control;
+ objpile_t *tmp;
+
+ /* Send TRANS_PREFETCH control message */
+ control = TRANS_PREFETCH;
+ send_data(sd, &control, sizeof(char));
+
+ /* Send Oids and offsets in pairs */
+ tmp = mcpilenode->objpiles;
+ while(tmp != NULL) {
+ len = sizeof(int) + sizeof(unsigned int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
+ char oidnoffset[len];
+ char *buf=oidnoffset;
+ *((int*)buf) = tmp->numoffset;
+ buf+=sizeof(int);
+ *((unsigned int *)buf) = tmp->oid;
+ buf+=sizeof(unsigned int);
+ *((unsigned int *)buf) = myIpAddr;
+ buf += sizeof(unsigned int);
+ memcpy(buf, tmp->offset, (tmp->numoffset)*sizeof(short));
+ send_data(sd, oidnoffset, len);
+ tmp = tmp->next;
+ }
+
+ /* Send a special char -1 to represent the end of sending oids + offset pair to remote machine */
+ endpair = -1;
+ send_data(sd, &endpair, sizeof(int));
+
+ return;
+}
+
+int getPrefetchResponse(int sd) {
+ int length = 0, size = 0;
+ char control;
+ unsigned int oid;
+ void *modptr, *oldptr;
+
+ recv_data((int)sd, &length, sizeof(int));
+ size = length - sizeof(int);
+ char recvbuffer[size];
+
+ recv_data((int)sd, recvbuffer, size);
+ control = *((char *) recvbuffer);
+ if(control == OBJECT_FOUND) {
+ oid = *((unsigned int *)(recvbuffer + sizeof(char)));
+ size = size - (sizeof(char) + sizeof(unsigned int));
+ pthread_mutex_lock(&prefetchcache_mutex);
+ if ((modptr = prefetchobjstrAlloc(size)) == NULL) {
+ printf("Error: objstrAlloc error for copying into prefetch cache %s, %d\n", __FILE__, __LINE__);
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ return -1;
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ memcpy(modptr, recvbuffer + sizeof(char) + sizeof(unsigned int), size);
+ STATUS(modptr)=0;
+
+ /* 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) {
+ /* If older version then update with new object ptr */
+ if(((objheader_t *)oldptr)->version <= ((objheader_t *)modptr)->version) {
+ prehashRemove(oid);
+ prehashInsert(oid, modptr);
+ }
+ } else {/* Else 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*/
+ pthread_mutex_unlock(&pflookup.lock);
+ } else if(control == OBJECT_NOT_FOUND) {
+ oid = *((unsigned int *)(recvbuffer + sizeof(char)));
+ /* TODO: For each object not found query DHT for new location and retrieve the object */
+ /* Throw an error */
+ printf("OBJECT %x NOT FOUND.... THIS SHOULD NOT HAPPEN...TERMINATE PROGRAM\n", oid);
+ // exit(-1);
+ } else {
+ printf("Error: in decoding the control value %d, %s, %d\n",control, __FILE__, __LINE__);
+ }
+
+ return 0;
+}
+
+unsigned short getObjType(unsigned int oid) {
+ objheader_t *objheader;
+ unsigned short numoffset[] ={0};
+ short fieldoffset[] ={};
+
+ if ((objheader = (objheader_t *) mhashSearch(oid)) == NULL) {
+ if ((objheader = (objheader_t *) prehashSearch(oid)) == NULL) {
+ prefetch(0, 1, &oid, numoffset, fieldoffset);
+ pthread_mutex_lock(&pflookup.lock);
+ while ((objheader = (objheader_t *) prehashSearch(oid)) == NULL) {
+ pthread_cond_wait(&pflookup.cond, &pflookup.lock);
}
-
- //Read message control message from participant side
- if((n = read(sd, &control, sizeof(char))) <= 0) {
- perror("Error in reading control message from Participant\n");
- return NULL;
+ pthread_mutex_unlock(&pflookup.lock);
+ }
+ }
+
+ return TYPE(objheader);
+}
+
+int startRemoteThread(unsigned int oid, unsigned int mid)
+{
+ int sock;
+ struct sockaddr_in remoteAddr;
+ char msg[1 + sizeof(unsigned int)];
+ int bytesSent;
+ int status;
+
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+ {
+ perror("startRemoteThread():socket()");
+ return -1;
}
- recvcontrol = control;
-
- //Update common data structure and increment count
- tdata->recvmsg[tdata->thread_id].rcv_status = recvcontrol;
- //Lock and update count
- //Thread sleeps until all messages from pariticipants are received by coordinator
- pthread_mutex_lock(tdata->lock);
- (*(tdata->count))++;
+
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
- if(*(tdata->count) == tdata->pilecount) {
- pthread_cond_broadcast(tdata->threshold);
- } else {
- pthread_cond_wait(tdata->threshold, tdata->lock);
- }
-
- //process the participant's request
- if (decideResponse(tdata, sd, 0) != 0) { // Send the first call to decideResponse() ; indicated by parameter 0
- printf("decideResponse returned error %s,%d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(tdata->lock);
- return NULL;
+ if (connect(sock, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0)
+ {
+ printf("startRemoteThread():error %d connecting to %s:%d\n", errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ status = -1;
+ }
+ else
+ {
+ msg[0] = START_REMOTE_THREAD;
+ *((unsigned int *) &msg[1]) = oid;
+ send_data(sock, msg, 1 + sizeof(unsigned int));
}
- pthread_mutex_unlock(tdata->lock);
- close(sd);
- pthread_exit(NULL);
+ close(sock);
+ return status;
}
-int transCommit(transrecord_t *record) {
- chashlistnode_t *curr, *ptr, *next;
- unsigned int size;//Represents number of bins in the chash table
- unsigned int machinenum, tot_bytes_mod, *listmid;
- objheader_t *headeraddr;
- plistnode_t *tmp, *pile = NULL;
- int i, rc;
- int pilecount = 0, offset, numthreads = 0, trecvcount = 0, tmachcount = 0;
- char buffer[RECEIVE_BUFFER_SIZE],control;
- char transid[TID_LEN];
- static int newtid = 0;
- trans_req_data_t *tosend;
-
- ptr = record->lookupTable->table;
- size = record->lookupTable->size;
- //Look through all the objects in the cache and make piles
- for(i = 0; i < size ;i++) {
- curr = &ptr[i];
- //Inner loop to traverse the linked list of the cache lookupTable
- while(curr != NULL) {
- //if the first bin in hash table is empty
- if(curr->key == 0) {
- break;
- }
- next = curr->next;
- //Get machine location for object id
-
- if ((machinenum = lhashSearch(curr->key)) == 0) {
- printf("Error: No such machine\n");
- return 1;
- }
-
- //TODO only for debug
- //machinenum = 1;
- if ((headeraddr = chashSearch(record->lookupTable, curr->key)) == NULL) {
- printf("Error: No such oid\n");
- return 1;
- }
- //Make machine groups
- if ((pile = pInsert(pile, headeraddr, machinenum, record->lookupTable->numelements)) == NULL) {
- printf("pInsert error %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- curr = next;
- }
+//TODO: when reusing oids, make sure they are not already in use!
+static unsigned int id = 0xFFFFFFFF;
+unsigned int getNewOID(void) {
+ id += 2;
+ if (id > oidMax || id < oidMin)
+ {
+ id = (oidMin | 1);
}
+ return id;
+}
- //Create the packet to be sent in TRANS_REQUEST
- tmp = pile;
- pilecount = pCount(pile); //Keeps track of the number of participants
-
- //Thread related variables
- pthread_t thread[pilecount]; //Create threads for each participant
- pthread_attr_t attr;
- pthread_cond_t tcond;
- pthread_mutex_t tlock;
- pthread_mutex_t tlshrd;
- //thread_data_array_t thread_data_array[pilecount];
- thread_data_array_t *thread_data_array;
-
- thread_data_array = (thread_data_array_t *) malloc(sizeof(thread_data_array_t)*pilecount);
-
- 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);
+int processConfigFile()
+{
+ FILE *configFile;
+ const int maxLineLength = 200;
+ char lineBuffer[maxLineLength];
+ char *token;
+ const char *delimiters = " \t\n";
+ char *commentBegin;
+ in_addr_t tmpAddr;
- //Keep track of list of machine ids per transaction
- if((listmid = calloc(pilecount, sizeof(unsigned int))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
-
- pListMid(pile, listmid);
- //Process each machine group
- while(tmp != NULL) {
- //Create transaction id
- newtid++;
- //trans_req_data_t *tosend;
- if ((tosend = calloc(1, sizeof(trans_req_data_t))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- tosend->f.control = TRANS_REQUEST;
- sprintf(tosend->f.trans_id, "%x_%d", tmp->mid, newtid);
- tosend->f.mcount = pilecount;
- tosend->f.numread = tmp->numread;
- tosend->f.nummod = tmp->nummod;
- tosend->f.sum_bytes = tmp->sum_bytes;
- tosend->listmid = listmid;
- tosend->objread = tmp->objread;
- tosend->oidmod = tmp->oidmod;
- thread_data_array[numthreads].thread_id = numthreads;
- thread_data_array[numthreads].mid = tmp->mid;
- thread_data_array[numthreads].pilecount = pilecount;
- thread_data_array[numthreads].buffer = tosend;
- thread_data_array[numthreads].recvmsg = rcvd_control_msg;
- thread_data_array[numthreads].threshold = &tcond;
- thread_data_array[numthreads].lock = &tlock;
- thread_data_array[numthreads].count = &trecvcount;
- thread_data_array[numthreads].rec = record;
-
- rc = pthread_create(&thread[numthreads], NULL, transRequest, (void *) &thread_data_array[numthreads]);
- if (rc) {
- perror("Error in pthread create");
- return 1;
- }
-
- numthreads++;
- //TODO frees
- //free(tosend);
- tmp = tmp->next;
+ configFile = fopen(CONFIG_FILENAME, "r");
+ if (configFile == NULL)
+ {
+ printf("error opening %s:\n", CONFIG_FILENAME);
+ perror("");
+ return -1;
}
- // 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)
+ 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)
{
- printf("ERROR return code from pthread_join() is %d\n", rc);
- return 1;
+ 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);
- //Free resources
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
-// for(i = 0 ;i< pilecount ;i++) {
- free(tosend);
-// }
- free(listmid);
- pDelete(pile);
+ 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;
}
-//mnun will be used to represent the 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);
-
- if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
- perror("Error in connect\n");
- return NULL;
- }
- char readrequest[sizeof(char)+sizeof(unsigned int)];
- readrequest[0] = READ_REQUEST;
- *((unsigned int *)(&readrequest[1])) = oid;
- if (write(sd, &readrequest, sizeof(readrequest)) < 0) {
- perror("Error sending message\n");
- return NULL;
- }
+void addHost(unsigned int hostIp)
+{
+ unsigned int *tmpArray;
-#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;
+ 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;
}
- switch(control) {
- case OBJECT_NOT_FOUND:
- return NULL;
- case OBJECT_FOUND:
- if((val = read(sd, &size, sizeof(int))) <= 0) {
- perror("No size is read from the participant\n");
- return NULL;
+
+ 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(unsigned 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;
+
+ oid = oidarry[0];
+ if((mid = lhashSearch(oid)) == 0) {
+ printf("Error: %s() No such machine found for oid =%x\n",__func__, oid);
+ return;
+ }
+
+ 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));
+ size = 1 + numoid * (sizeof(unsigned int) + sizeof(unsigned short)) + 3 * sizeof(unsigned int);
+ send_data(sock, msg, size);
+ 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;
}
- objcopy = objstrAlloc(record->cache, size);
- if((val = read(sd, objcopy, size)) <= 0) {
- perror("No objects are read from the remote participant\n");
- return NULL;
+ }
+ 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));
}
- //Insert into cache's lookup table
- chashInsert(record->lookupTable, oid, objcopy);
- break;
- default:
- printf("Error in recv request from participant on a READ_REQUEST\n");
- return NULL;
+ }
}
- close(sd);
- return objcopy;
+ 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;
+ fflush(stdout);
+ } 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;
+
+ size = 1 + 2*sizeof(unsigned int) + sizeof(unsigned short);
+ send_data(sock, msg, size);
+ }
+ //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);
+}
+
+/* This function inserts necessary information into
+ * a machine pile data structure */
+plistnode_t *pInsert(plistnode_t *pile, objheader_t *headeraddr, unsigned int mid, int num_objs) {
+ plistnode_t *ptr, *tmp;
+ int found = 0, offset = 0;
+
+ tmp = pile;
+ //Add oid into a machine that is already present in the pile linked list structure
+ while(tmp != NULL) {
+ if (tmp->mid == mid) {
+ int tmpsize;
+
+ if (STATUS(headeraddr) & NEW) {
+ tmp->oidcreated[tmp->numcreated] = OID(headeraddr);
+ tmp->numcreated++;
+ GETSIZE(tmpsize, headeraddr);
+ tmp->sum_bytes += sizeof(objheader_t) + tmpsize;
+ }else if (STATUS(headeraddr) & DIRTY) {
+ tmp->oidmod[tmp->nummod] = OID(headeraddr);
+ tmp->nummod++;
+ GETSIZE(tmpsize, headeraddr);
+ tmp->sum_bytes += sizeof(objheader_t) + tmpsize;
+ } else {
+ offset = (sizeof(unsigned int) + sizeof(short)) * tmp->numread;
+ *((unsigned int *)(((char *)tmp->objread) + offset))=OID(headeraddr);
+ offset += sizeof(unsigned int);
+ *((short *)(((char *)tmp->objread) + offset)) = headeraddr->version;
+ tmp->numread ++;
+ }
+ found = 1;
+ break;
+ }
+ tmp = tmp->next;
+ }
+ //Add oid for any new machine
+ if (!found) {
+ int tmpsize;
+ if((ptr = pCreate(num_objs)) == NULL) {
+ return NULL;
+ }
+ ptr->mid = mid;
+ if (STATUS(headeraddr) & NEW) {
+ ptr->oidcreated[ptr->numcreated] = OID(headeraddr);
+ ptr->numcreated ++;
+ GETSIZE(tmpsize, headeraddr);
+ ptr->sum_bytes += sizeof(objheader_t) + tmpsize;
+ } else if (STATUS(headeraddr) & DIRTY) {
+ ptr->oidmod[ptr->nummod] = OID(headeraddr);
+ ptr->nummod ++;
+ GETSIZE(tmpsize, headeraddr);
+ ptr->sum_bytes += sizeof(objheader_t) + tmpsize;
+ } else {
+ *((unsigned int *)ptr->objread)=OID(headeraddr);
+ offset = sizeof(unsigned int);
+ *((short *)(((char *)ptr->objread) + offset)) = headeraddr->version;
+ ptr->numread ++;
+ }
+ ptr->next = pile;
+ pile = ptr;
+ }
+
+ /* Clear Flags */
+ STATUS(headeraddr) =0;
+
+ return pile;
}