49 lines
908 B
C
49 lines
908 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <unistd.h>
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#include "common.h"
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#include "common_threads.h"
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#ifdef linux
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#include <semaphore.h>
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#elif __APPLE__
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#include "zemaphore.h"
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#endif
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sem_t s;
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void *child(void *arg) {
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Sem_wait(&s);
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printf("child %lld\n", (long long int) arg);
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sleep(1);
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Sem_post(&s);
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return NULL;
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}
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int main(int argc, char *argv[]) {
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if (argc != 3) {
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fprintf(stderr, "usage: throttle <num_threads> <sem_value>\n");
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exit(1);
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}
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int num_threads = atoi(argv[1]);
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int sem_value = atoi(argv[2]);
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Sem_init(&s, sem_value);
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printf("parent: begin\n");
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pthread_t c[num_threads];
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int i;
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for (i = 0; i < num_threads; i++)
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Pthread_create(&c[i], NULL, child, (void *) (long long int)i);
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for (i = 0; i < num_threads; i++)
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Pthread_join(c[i], NULL);
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printf("parent: end\n");
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return 0;
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}
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