* 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;
- }
+ 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;
+ }
}
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;
- }
+ 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;
+ }
}
int recv_data_errorcode(int fd , void *buf, int buflen) {
return 0;
}
-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;
+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++)
- ;
- return i;
+ int i;
+ for(i=0 ;array[i] != -1; i++)
+ ;
+ return i;
}
+
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;
+ int max, i;
+ max = array[0];
+ for(i = 0; i < arraylength; i++){
+ if(array[i] > max) {
+ max = array[i];
+ }
+ }
+ return max;
}
+
/* This function is a prefetch call generated by the compiler that
* populates the shared primary prefetch queue*/
void prefetch(int ntuples, unsigned int *oids, unsigned short *endoffsets, short *arrayfields) {
/* Allocate for the queue node*/
- if(ntuples > 0) {
- int qnodesize = sizeof(prefetchqelem_t) + sizeof(int) + ntuples * (sizeof(unsigned short) + sizeof(unsigned int)) + endoffsets[ntuples - 1] * sizeof(short);
- char * node;
-
- if((node = calloc(1, qnodesize)) == NULL) {
- printf("Calloc Error %s, %d\n", __FILE__, __LINE__);
- return;
- } else {
- /* Set queue node values */
- int len = sizeof(prefetchqelem_t);
- int i;
- unsigned int *narray;
- unsigned short *narray2;
- short * narray3;
- int top=endoffsets[ntuples-1];
- *((int *)(node+len))=ntuples;
- len += sizeof(int);
- narray=(unsigned int *)(node+len);
- narray2=(unsigned short *)(narray+ntuples);
- narray3=(short *)(narray2+ntuples);
-
- for(i=0;i<ntuples;i++) {
- narray[i]=oids[i];
- narray2[i]=endoffsets[i];
- }
- for(i=0;i<top;i++) {
- narray3[i]=arrayfields[i];
- }
- /* 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);
- }
- }
+ int qnodesize = sizeof(prefetchqelem_t) + sizeof(int) + ntuples * (sizeof(unsigned short) + sizeof(unsigned int)) + endoffsets[ntuples - 1] * sizeof(short);
+ char * node= malloc(qnodesize);
+ /* Set queue node values */
+ int len = sizeof(prefetchqelem_t);
+ int top=endoffsets[ntuples-1];
+ *((int *)(node+len))=ntuples;
+ len += 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 */
+ 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. */
//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;
- }
+ 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);
- //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
-
- //Initialize primary shared queue
- queueInit();
- //Initialize machine pile w/prefetch oids and offsets shared queue
- mcpileqInit();
+/* 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 */
- //Create the primary prefetch thread
- do {
- retval=pthread_create(&tPrefetch, NULL, transPrefetch, NULL);
- } while(retval!=0);
- pthread_detach(tPrefetch);
+void transInit() {
+ int t, rc;
+ int retval;
+ //Create and initialize prefetch cache structure
+ prefetchcache = 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)) {
+ 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);
}
/* 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;
+ 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;
+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 = calloc(1, sizeof(transrecord_t));
- tmp->cache = objstrCreate(1048576);
- tmp->lookupTable = chashCreate(HASH_SIZE, LOADFACTOR);
+transrecord_t *transStart() {
+ transrecord_t *tmp = calloc(1, sizeof(transrecord_t));
+ tmp->cache = objstrCreate(1048576);
+ tmp->lookupTable = chashCreate(HASH_SIZE, LOADFACTOR);
#ifdef COMPILER
- tmp->revertlist=NULL;
+ tmp->revertlist=NULL;
#endif
- return tmp;
+ return tmp;
}
/* This function finds the location of the objects involved in a transaction
return NULL;
}
- /* Search local transaction cache */
if((objheader = (objheader_t *)chashSearch(record->lookupTable, oid)) != NULL){
+ /* Search local transaction cache */
#ifdef COMPILER
return &objheader[1];
#else
#else
return objcopy;
#endif
- } else if((tmp = (objheader_t *) prehashSearch(oid)) != NULL) { /* Look up in prefetch cache */
+ } 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);
}
/* 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));
- tmp->notifylist = NULL;
- OID(tmp) = getNewOID();
- tmp->version = 1;
- tmp->rcount = 1;
- STATUS(tmp) = NEW;
- chashInsert(record->lookupTable, OID(tmp), tmp);
-
+objheader_t *transCreateObj(transrecord_t *record, unsigned int size) {
+ 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
+ return &tmp[1]; //want space after object header
#else
- return tmp;
+ 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 = 0;
- unsigned int size;/* Represents number of bins in the chash table */
- chashlistnode_t *curr, *ptr, *next;
- plistnode_t *pile = NULL;
- unsigned int machinenum;
- void *localmachinenum;
- objheader_t *headeraddr;
-
- ptr = record->lookupTable->table;
- size = record->lookupTable->size;
-
- 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;
-
- 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
- if ((pile = pInsert(pile, headeraddr, machinenum, record->lookupTable->numelements)) == NULL) {
- printf("pInsert error %s, %d\n", __FILE__, __LINE__);
- return NULL;
- }
-
- curr = next;
- }
- }
- return pile;
+ 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
* 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 = 0, trecvcount = 0;
- char control;
- char transid[TID_LEN];
- trans_req_data_t *tosend;
- trans_commit_data_t transinfo;
- static int newtid = 0;
- char treplyctrl = 0, treplyretry = 0; /* keeps track of the common response that needs to be sent */
- char localstat = 0;
- thread_data_array_t *thread_data_array;
- local_thread_data_array_t *ltdata;
-
- do {
- 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*/
- pile_ptr = pile = createPiles(record);
-
- /* 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 */
- 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;
-
- 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;
- }
-
- 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;
- }
- 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;
- }
- } 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 < 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;
- }
- free(thread_data_array[i].buffer);
- }
-
- /* Free resources */
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- free(listmid);
- pDelete(pile_ptr);
-
- /* wait a random amount of time before retrying to commit transaction*/
- if(treplyretry == 1) {
- free(thread_data_array);
- free(ltdata);
- randomdelay();
- }
-
- /* Retry trans commit procedure during soft_abort case */
- } while (treplyretry == 1);
-
-
- if(treplyctrl == TRANS_ABORT) {
- /* Free Resources */
- objstrDelete(record->cache);
- chashDelete(record->lookupTable);
- free(record);
- free(thread_data_array);
- free(ltdata);
- 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("Error: in %s() THIS SHOULD NOT HAPPEN.....EXIT PROGRAM\n", __func__);
- exit(-1);
+ unsigned int tot_bytes_mod, *listmid;
+ plistnode_t *pile, *pile_ptr;
+ int i, j, rc, val;
+ int pilecount, offset, threadnum = 0, trecvcount = 0;
+ char control;
+ char transid[TID_LEN];
+ trans_req_data_t *tosend;
+ trans_commit_data_t transinfo;
+ static int newtid = 0;
+ char treplyctrl = 0, treplyretry = 0; /* keeps track of the common response that needs to be sent */
+ char localstat = 0;
+ thread_data_array_t *thread_data_array;
+ local_thread_data_array_t *ltdata;
+
+ do {
+ 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*/
+ pile_ptr = pile = createPiles(record);
+
+ /* 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;
+ /* 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;
}
- return 0;
+ } 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 < 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;
+ }
+ free(thread_data_array[i].buffer);
+ }
+
+ /* Free resources */
+ pthread_cond_destroy(&tcond);
+ pthread_mutex_destroy(&tlock);
+ free(listmid);
+ 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) {
+ /* Free Resources */
+ objstrDelete(record->cache);
+ chashDelete(record->lookupTable);
+ free(record);
+ free(thread_data_array);
+ free(ltdata);
+ 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("Error: in %s() THIS SHOULD NOT HAPPEN.....EXIT PROGRAM\n", __func__);
+ exit(-1);
+ }
+ return 0;
}
/* This function sends information involved in the transaction request
* 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;
-
- /* Send Trans Request */
- if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- perror("Error in socket for TRANS_REQUEST\n");
- pthread_exit(NULL);
- }
- bzero((char*) &serv_addr, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(LISTEN_PORT);
- midtoIP(tdata->mid,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 for TRANS_REQUEST\n");
- close(sd);
- 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));
- 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 t
- * to all participants in their respective socket */
- if (sendResponse(tdata, sd) == 0) {
- printf("sendResponse returned error %s,%d\n", __FILE__, __LINE__);
- close(sd);
- 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);
- }
-
- /* Close connection */
- close(sd);
- pthread_exit(NULL);
+ 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;
+
+ /* Send Trans Request */
+ if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ perror("Error in socket for TRANS_REQUEST\n");
+ pthread_exit(NULL);
+ }
+ bzero((char*) &serv_addr, sizeof(serv_addr));
+ serv_addr.sin_family = AF_INET;
+ serv_addr.sin_port = htons(LISTEN_PORT);
+ midtoIP(tdata->mid,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 for TRANS_REQUEST\n");
+ close(sd);
+ 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));
+ 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 t
+ * to all participants in their respective socket */
+ if (sendResponse(tdata, sd) == 0) {
+ printf("sendResponse returned error %s,%d\n", __FILE__, __LINE__);
+ close(sd);
+ 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);
+ }
+
+ /* Close connection */
+ close(sd);
+ 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;
- }
- }
+ 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 */
+ 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;
+ *(tdata->replyretry) = 0;
+ } else {
+ /* Send Abort in soft abort case followed by retry commiting transaction again*/
+ *(tdata->replyctrl) = TRANS_ABORT;
+ *(tdata->replyretry) = 1;
+ }
+
+ return;
+}
- if(transdisagree > 0) {
- /* Send Abort */
- *(tdata->replyctrl) = TRANS_ABORT;
- *(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;
- *(tdata->replyretry) = 0;
- } else {
- /* Send Abort in soft abort case followed by retry commiting transaction again*/
- *(tdata->replyctrl) = TRANS_ABORT;
- *(tdata->replyretry) = 1;
- }
+/* 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()*/
- 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(tdata->recvmsg[tdata->thread_id].rcv_status == TRANS_SOFT_ABORT) {
- // Read list of objects missing
- recv_data(sd, &oidcount, sizeof(int));
- //if((read(sd, &oidcount, sizeof(int)) != 0) && (oidcount != 0)) {
- if(oidcount != 0) {
- size = oidcount * sizeof(unsigned int);
- if((oidnotfound = calloc(oidcount, sizeof(unsigned int))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- return 0;
- }
- ptr = (char *) oidnotfound;
- recv_data(sd, ptr, size);
- }
- 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 */
- retval = TRANS_COMMIT;
- }
-
- return retval;
+ 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.
- * */
+/* 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;
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 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));
-
- 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[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) == LOCK) {
- 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 {/* If Obj is not locked then lock object */
- STATUS(((objheader_t *)mobj)) |= LOCK;
- /* Save all object oids that are locked on this machine during this transaction request call */
- oidlocked[objlocked] = OID(((objheader_t *)mobj));
- objlocked++;
- 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) || (objnotfound > 0 && v_nomatch == 0)) {
- localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_SOFT_ABORT;
- }
+/* 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 */
- /* 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 = 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->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);
+void *handleLocalReq(void *threadarg) {
+ unsigned int *oidnotfound = NULL, *oidlocked = NULL;
+ 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));
+
+ 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[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) == LOCK) {
+ 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;
}
- if (localtdata->transinfo->objnotfound != NULL) {
- free(localtdata->transinfo->objnotfound);
+ } else {/* If Obj is not locked then lock object */
+ STATUS(((objheader_t *)mobj)) |= LOCK;
+ /* Save all object oids that are locked on this machine during this transaction request call */
+ oidlocked[objlocked] = OID(((objheader_t *)mobj));
+ objlocked++;
+ 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;
}
-
- pthread_exit(NULL);
+ }
+ }
+ } // 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;
+ }
+
+ /* 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 = 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->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;
- }
- STATUS(((objheader_t *)header)) &= ~(LOCK);
- }
-
- return 0;
+ 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;
+ }
+ STATUS(((objheader_t *)header)) &= ~(LOCK);
+ }
+
+ return 0;
}
/*This function completes the COMMIT process is the transaction is commiting*/
return 0;
}
-/* This function checks if the prefetch oids are same and have same offsets
- * for case x.a.b and y.a.b where x and y have same oid's
- * or if a.b.c is a subset of x.b.c.d*/
-/* check for case where the generated request a.y.z or x.y.z.g then
- * prefetch needs to be generated for x.y.z.g if oid of a and x are same*/
-void checkPrefetchTuples(prefetchqelem_t *node) {
- int i,j, count,k, sindex, index;
- char *ptr, *tmp;
- int ntuples, slength;
- unsigned int *oid;
- unsigned short *endoffsets;
- short *offsets;
-
- /* Check for the case x.y.z and a.b.c are same oids */
- ptr = (char *) node;
- ntuples = *(GET_NTUPLES(ptr));
- oid = GET_PTR_OID(ptr);
- endoffsets = GET_PTR_EOFF(ptr, ntuples);
- offsets = GET_PTR_ARRYFLD(ptr, ntuples);
-
- /* Find offset length for each tuple */
- int numoffset[ntuples];
- numoffset[0] = endoffsets[0];
- for(i = 1; i<ntuples; i++) {
- numoffset[i] = endoffsets[i] - endoffsets[i-1];
- }
- /* Check for redundant tuples by comparing oids of each tuple */
- for(i = 0; i < ntuples; i++) {
- if(oid[i] == 0)
- continue;
- for(j = i+1 ; j < ntuples; j++) {
- if(oid[j] == 0)
- continue;
- /*If oids of tuples match */
- if (oid[i] == oid[j]) {
- /* Find the smallest offset length of two tuples*/
- if(numoffset[i] > numoffset[j]){
- slength = numoffset[j];
- sindex = j;
- }
- else {
- slength = numoffset[i];
- sindex = i;
- }
-
- /* Compare the offset values based on the current indices
- * break if they do not match
- * if all offset values match then pick the largest tuple*/
-
- if(i == 0) {
- k = 0;
- } else {
- k = endoffsets[i-1];
- }
- index = endoffsets[j -1];
- for(count = 0; count < slength; count ++) {
- if (offsets[k] != offsets[index]) {
- break;
- }
- index++;
- k++;
- }
- if(slength == count) {
- oid[sindex] = 0;
- }
- }
- }
- }
+prefetchpile_t *foundLocal(prefetchqelem_t *node) {
+ char * ptr = (char *) node;
+ 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 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;
+ //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))
+ goto tuple;
+ //Add to remote requests
+ machinenum=lhashSearch(oid);
+ insertPile(machinenum, oid, endindex-newbase, &arryfields[newbase], &head);
+ tuple:
+ ;
+ }
+ return head;
}
-/* 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;
- int ntuples, i, machinenum, count=0;
- unsigned int *oid;
- unsigned short *endoffsets;
- short *arryfields, *offset;
- prefetchpile_t *head = NULL, *tmp = NULL;
-
- /* Check for the case x.y.z and a.b.c are same oids */
- 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((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] == 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 */
- 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;
+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;
+ }
}
-prefetchpile_t *foundLocal(prefetchqelem_t *node) {
- int ntuples,i, j, k, oidnfound = 0, arryfieldindex,nextarryfieldindex, flag = 0, val;
- unsigned int *oid;
- int isArray;
- char *ptr, *tmp;
- objheader_t *objheader;
- unsigned short *endoffsets;
- short *arryfields;
-
- ptr = (char *) node;
- ntuples = *(GET_NTUPLES(ptr));
- 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];
- for(i = 1; i<ntuples; i++) {
- numoffset[i] = endoffsets[i] - endoffsets[i-1];
- }
-
- for(i = 0; i < ntuples; i++) {
- 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) {
- isArray = 0;
- tmp = (char *) objheader;
- int orgnumoffset = numoffset[i];
- if(i == 0) {
- arryfieldindex = 0;
- }else {
- arryfieldindex = endoffsets[i-1];
- }
-
- for(j = 0; j<orgnumoffset; j++) {
- unsigned int objoid = 0;
- /* Check for arrays */
- if(TYPE(objheader) > NUMCLASSES) {
- isArray = 1;
- }
- if(isArray == 1) {
- int elementsize = classsize[TYPE(objheader)];
- struct ArrayObject *ao = (struct ArrayObject *) (tmp + sizeof(objheader_t));
- int length = ao->___length___;
- /* Check if array out of bounds */
- if(arryfields[arryfieldindex] < 0 || arryfields[arryfieldindex] >= length) {
- break; //if yes then treat the object as found
- }
- 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;
- //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, oid[i], i);
- break;
- }
- tmp = (char *) objheader;
- isArray = 0;
- }
- /*If all offset oids are found locally,make the prefetch tuple invalid */
- if(flag == 0) {
- oid[i] = 0;
- }
- } else {
- /* Look in Prefetch cache */
- checkPreCache(node, numoffset, oid[i],i);
- }
- flag = 0;
- }
-
- /* Make machine groups */
- prefetchpile_t *head = NULL;
- if((head = makePreGroups(node, numoffset)) == NULL) {
- printf("Error in makePreGroups() %s %d\n", __FILE__, __LINE__);
- return NULL;
- }
-
- return head;
-}
+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;
+ }
-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;
- unsigned short *endoffsets;
- short *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)];
- struct ArrayObject *ao = (struct ArrayObject *) (tmp + sizeof(objheader_t));
- int length = ao->___length___;
- /* Check if array out of bounds */
- if(arryfields[arryfieldindex] < 0 || arryfields[arryfieldindex] >= length) {
- break; //if yes treat the object as found
- }
- 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;
- }
+ 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 */
pthread_mutex_lock(&pqueue.qlock);
/* while primary queue is empty, then wait */
- while((pqueue.front == NULL) && (pqueue.rear == NULL)) {
+ while(pqueue.front == NULL) {
pthread_cond_wait(&pqueue.qcond, &pqueue.qlock);
}
/* dequeue node to create a machine piles and finally unlock mutex */
- prefetchqelem_t *qnode;
- if((qnode = pre_dequeue()) == NULL) {
- printf("Error: No node returned %s, %d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(&pqueue.qlock);
- continue;
- }
+ prefetchqelem_t *qnode = pre_dequeue();
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() */
prefetchpile_t *pilehead = foundLocal(qnode);
-
- // 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;
+
+ 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);
+
}
-
- /* Release socket */
- // freeSock(transPrefetchSockPool, pilehead->mid, sd);
-
- /* Deallocated pilehead */
- mcdealloc(pilehead);
-
// Deallocate the prefetch queue pile node
predealloc(qnode);
}
}
+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 off, len, endpair, count = 0;
+ int len, endpair;
char control;
objpile_t *tmp;
/* Send Oids and offsets in pairs */
tmp = mcpilenode->objpiles;
while(tmp != NULL) {
- off = 0;
- count++; /* Keeps track of the number of oid and offset tuples sent per remote machine */
len = sizeof(int) + sizeof(unsigned int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
char oidnoffset[len];
- bzero(oidnoffset, len);
- *((int*)oidnoffset) = len;
- off = sizeof(int);
- *((unsigned int *)(oidnoffset + off)) = tmp->oid;
- off += sizeof(unsigned int);
- *((unsigned int *)(oidnoffset + off)) = myIpAddr;
- off += sizeof(unsigned int);
- int i;
- for(i = 0; i < tmp->numoffset; i++) {
- *((short*)(oidnoffset + off)) = tmp->offset[i];
- off+=sizeof(short);
- }
+ char *buf=oidnoffset;
+ *((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));
send_data(sd, oidnoffset, len);
tmp = tmp->next;
}
}
int getPrefetchResponse(int sd) {
- int numbytes = 0, length = 0, size = 0;
- char *recvbuffer, control;
- unsigned int oid;
- void *modptr, *oldptr;
-
- recv_data((int)sd, &length, sizeof(int));
- size = length - sizeof(int);
- if((recvbuffer = calloc(1, size)) == NULL) {
- printf("%s() Calloc error at %s,%d\n", __func__, __FILE__, __LINE__);
- return -1;
- }
-
- recv_data((int)sd, recvbuffer, size);
-
- control = *((char *) recvbuffer);
- if(control == OBJECT_FOUND) {
- numbytes = 0;
- oid = *((unsigned int *)(recvbuffer + sizeof(char)));
- size = size - (sizeof(char) + sizeof(unsigned int));
- pthread_mutex_lock(&prefetchcache_mutex);
- if ((modptr = objstrAlloc(prefetchcache, size)) == NULL) {
- printf("Error: objstrAlloc error for copying into prefetch cache %s, %d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(&prefetchcache_mutex);
- free(recvbuffer);
- return -1;
- }
- pthread_mutex_unlock(&prefetchcache_mutex);
- memcpy(modptr, recvbuffer + sizeof(char) + sizeof(unsigned int), size);
-
- /* 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 {
- /* TODO modptr should be reference counted */
- }
- } 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);
- free(recvbuffer);
- exit(-1);
- } else {
- printf("Error: in decoding the control value %d, %s, %d\n",control, __FILE__, __LINE__);
- }
-
- free(recvbuffer);
-
- return 0;
+ int numbytes = 0, length = 0, size = 0;
+ char *recvbuffer, control;
+ unsigned int oid;
+ void *modptr, *oldptr;
+
+ recv_data((int)sd, &length, sizeof(int));
+ size = length - sizeof(int);
+ recvbuffer = calloc(1, size);
+
+ recv_data((int)sd, recvbuffer, size);
+
+ control = *((char *) recvbuffer);
+ if(control == OBJECT_FOUND) {
+ numbytes = 0;
+ oid = *((unsigned int *)(recvbuffer + sizeof(char)));
+ size = size - (sizeof(char) + sizeof(unsigned int));
+ pthread_mutex_lock(&prefetchcache_mutex);
+ if ((modptr = objstrAlloc(prefetchcache, size)) == NULL) {
+ printf("Error: objstrAlloc error for copying into prefetch cache %s, %d\n", __FILE__, __LINE__);
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ free(recvbuffer);
+ return -1;
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ memcpy(modptr, recvbuffer + sizeof(char) + sizeof(unsigned int), size);
+
+ /* 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 {
+ /* TODO modptr should be reference counted */
+ }
+ } 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);
+ free(recvbuffer);
+ exit(-1);
+ } else {
+ printf("Error: in decoding the control value %d, %s, %d\n",control, __FILE__, __LINE__);
+ }
+
+ free(recvbuffer);
+
+ 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(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);
- }
+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(1, &oid, numoffset, fieldoffset);
+ pthread_mutex_lock(&pflookup.lock);
+ while ((objheader = (objheader_t *) prehashSearch(oid)) == NULL) {
+ pthread_cond_wait(&pflookup.cond, &pflookup.lock);
}
-
- return TYPE(objheader);
+ pthread_mutex_unlock(&pflookup.lock);
+ }
+ }
+
+ return TYPE(objheader);
}
int startRemoteThread(unsigned int oid, unsigned int mid)
projects / IRC.git / commitdiff