diff options
Diffstat (limited to 'P2/lib/utils.c')
| -rw-r--r-- | P2/lib/utils.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/P2/lib/utils.c b/P2/lib/utils.c index f485b11..82f7a70 100644 --- a/P2/lib/utils.c +++ b/P2/lib/utils.c @@ -2,13 +2,20 @@ int openQueue() { int id = msgget(ftok("4061 Project 2 SS", 'S'), 0666 | IPC_CREAT); - if (id < 0) - { + if (id < 0) { perror("Cannot open queue.\n"); return -1; - }; + } return id; } +void closeQueue() { + int msgid = msgget(ftok("4061 Project 2 SS", 'S'), 0666); + if (msgid < 0) { + perror("Cannot open queue. It may already exist.\n"); + exit(-1); + } + msgctl(msgid, IPC_RMID, NULL); +} char *getChunkData(int mapperID) { printf("GETTING CHUNK DATA\n"); @@ -19,8 +26,8 @@ char *getChunkData(int mapperID) { msgrcv(mid, &message, sizeof(message.msgText), mapperID, 0); /*IMPLEMENT END AND ACK SOON*/ if (strncmp("END", message.msgText, 3)) { - struct msgBuffer ACK = {mapperID, "ACK"}; - msgsnd(mid, &ACK, MSGSIZE, 0); + // struct msgBuffer ACK = {mapperID, "ACK"}; + // msgsnd(mid, &ACK, MSGSIZE, 0); return NULL; } char* value = message.msgText; @@ -39,13 +46,13 @@ void sendChunkData(char *inputFile, int nMappers) { // construct chunks of 1024 bytes memset(message.msgText, '\0', MSGSIZE); while(read(fd, message.msgText, chunkSize) != 0) { - printf("%s\n", message.msgText); + // printf("%s\n", message.msgText); /* Go to the end of the chunk, check if final character is a space if character is a space, do nothing else cut off before that word and put back file */ // TODO! help message.msgType = map++; - //THIS IS DEBUG, NOT ACTUALLY FUNCTIONAL + //THIS IS DEBUG, NOT ACTUALLY FUNCTIONAL (like at all) msgsnd(msgid, &message, map, 0); if (map > nMappers) map = 1; @@ -56,7 +63,7 @@ void sendChunkData(char *inputFile, int nMappers) { msgsnd(msgid, &END, MSGSIZE, 0); // TODO! does this need to be in another loop or is blocking good enough? - msgrcv(msgid, &message, MSGSIZE, i, 0); + // msgrcv(msgid, &message, MSGSIZE, i, 0); } } @@ -81,8 +88,8 @@ int getInterData(char *Qkey, int reducerID) { Qkey = message.msgText; if (strncmp("END", message.msgText, 3)) { - struct msgBuffer ACK = {reducerID, "ACK"}; - msgsnd(id, &ACK, MSGSIZE, 0); + // struct msgBuffer ACK = {reducerID, "ACK"}; + // msgsnd(id, &ACK, MSGSIZE, 0); return 0; } else { return 1; |