\ub2e4\uc2dc thread\ub85c \ub3cc\uc544\uc654\ub2e4.<\/p>\n\n\n\n
#include <stdlib.h>\n#include <stdio.h>\n#include <string.h>\n#include <pthread.h>\n#define\tMAXNITEMS \t\t1000000\n#define\tMAXNTHREADS\t\t\t100\n#define MIN(X,Y) ((X)<(Y) ? (X) : (Y))\n\n\n\n\/\/gcc -lpthread \uc635\uc158\uc73c\ub85c \ucef4\ud30c\uc77c.\nint\t\tnitems;\t\t\t\/* read-only by producer and consumer *\/\n\n\n\/\/shared\ub97c \ucd08\uae30\ud654 \ud558\ub294\ub370,\n\/\/\ub9e8 \ucc98\uc74c\uc5d0 mutext\uac00 \uc788\uc74c.\n\/\/\ub098\uba38\uc9c0\ub294 0\uc73c\ub85c \ucd08\uae30\ud654\ub428..\nstruct {\n pthread_mutex_t\tmutex;\n int\tbuff[MAXNITEMS];\n int\tnput;\n int\tnval;\n} shared = { PTHREAD_MUTEX_INITIALIZER };\n\nvoid\t*produce(void *), *consume(void *);\n\n\nint\nmain(int argc, char **argv)\n{\n\tint\t\t\ti, nthreads, count[MAXNTHREADS];\n\tpthread_t\ttid_produce[MAXNTHREADS], tid_consume;\n\t\/\/\uc55e\uc5d0\uc11c\ubd80\ud130 \ucd08\uae30\ud654.\n\tstruct test {\n\t\tint no1;\n\t\tint no2;\n\t} teststruct = {10};\n\n\tif (argc != 3)\n\t\tperror(\"usage: prodcons2 <#items> <#threads>\");\n\tnitems = MIN(atoi(argv[1]), MAXNITEMS);\n\tnthreads = MIN(atoi(argv[2]), MAXNTHREADS);\n\n\t\/\/pthread_setconcurrency();\n\t\t\/* 4start all the producer threads *\/\n\tfor (i = 0; i < nthreads; i++) {\n\t\tcount[i] = 0;\n\t\tpthread_create(&tid_produce[i], NULL, produce, &count[i]);\n\t}\n\n\t\t\/* 4wait for all the producer threads *\/\n\tfor (i = 0; i < nthreads; i++) {\n\t\tpthread_join(tid_produce[i], NULL);\n\t\tprintf(\"count[%d] = %d\\n\", i, count[i]);\t\n\t}\n\n\t\t\/* 4start, then wait for the consumer thread *\/\n\tpthread_create(&tid_consume, NULL, consume, NULL);\n\tpthread_join(tid_consume, NULL);\n\n\texit(0);\n}\n\/* end main *\/\n\n\/* include producer *\/\nvoid *\nproduce(void *arg)\n{\n\tfor ( ; ; ) {\n\t\tpthread_mutex_lock(&shared.mutex);\n\t\tif (shared.nput >= nitems) {\n\t\t\tpthread_mutex_unlock(&shared.mutex);\n\t\t\treturn(NULL);\t\t\/* array is full, we're done *\/\n\t\t}\n\t\tshared.buff[shared.nput] = shared.nval;\n\t\tshared.nput++;\n\t\tshared.nval++;\n\t\tpthread_mutex_unlock(&shared.mutex);\n\t\t*((int *) arg) += 1;\n\t}\n}\n\nvoid *\nconsume(void *arg)\n{\n\tint\t\ti;\n\n\tfor (i = 0; i < nitems; i++) {\n\t\tif (shared.buff[i] != i)\n\t\t\tprintf(\"buff[%d] = %d\\n\", i, shared.buff[i]);\n\t}\n\treturn(NULL);\n}\n\/* end producer *\/\n<\/pre>\n","protected":false},"excerpt":{"rendered":"\ub2e4\uc2dc thread\ub85c 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