diff options
Diffstat (limited to '')
-rw-r--r-- | P2/lib/utils.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/P2/lib/utils.c b/P2/lib/utils.c index 17b3104..603a699 100644 --- a/P2/lib/utils.c +++ b/P2/lib/utils.c @@ -1,10 +1,62 @@ #include "utils.h" +//Receive from send and return the chonk char *getChunkData(int mapperID) { + //Message + struct msgBuffer message; + //Queue ID, not sure what it actually does + int mid; + //Queue Key + key_t key = 10; + mid = msgget(key, 0666 | IPC_CREAT); + if (mid < 0) { + perror("Cannot open queue.\n"); + return NULL; + } + msgrcv(mid, &message, MSGSIZE, mapperID, 0); + if (strcmp("END", message.msgText)) { + struct msgBuffer ACK = {mapperID, "ACK"}; + msgsnd(mid, &ACK, MSGSIZE, 0); + } + // msgctl(mid, IPC_RMID, 0); + return message.msgText; } // sends chunks of size 1024 to the mappers in RR fashion void sendChunkData(char *inputFile, int nMappers) { + struct msgBuffer message; + key_t key = 10; + int msgid; + + // open message queue + msgid = msgget(key, 0666 | IPC_CREAT); + if (msgid < 0) { + perror("Cannot open queue.\n"); + exit(-1); + } + // message.msgText = 1; + FILE *fptr = fopen(inputFile, "r"); + + // construct chunks of 1024 bytes + while(fgets(&message, chunkSize, fptr) != EOF) { + + /* 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 + + msgsnd(msgid, &message, mapperID); + } + + for (long i = 1; i < nMappers; i++) { + struct msgBuffer END = {i, "END"}; + 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); + } + + // msgctl(msgid, IPC_RMID, 0); // close that bih } // hash function to divide the list of word.txt files across reducers @@ -27,7 +79,7 @@ void shuffle(int nMappers, int nReducers) { // check if the character is valid for a word int validChar(char c){ - return (tolower(c) >= 'a' && tolower(c) <='z') || + return ((tolower(c) >= 'a') && tolower(c <='z')) || (c >= '0' && c <= '9'); } |