So, let's put it to the test: we will write a simple extension of our previous program, this time allowing the user to specify the number of threads to attempt to create within the process as the parameter (ch14/cr8_so_many_threads.c). The main function is as follows:
int main(int argc, char **argv){ long i; int ret; pthread_t tid; long numthrds=0; if (argc != 2) { fprintf(stderr, "Usage: %s number-of-threads-to-create\n", argv[0]); exit(EXIT_FAILURE); } numthrds = atol(argv[1]); if (numthrds <= 0) { fprintf(stderr, "Usage: %s number-of-threads-to-create\n", argv[0]); exit(EXIT_FAILURE); } for (i = 0; i < numthrds; i++) { ret = pthread_create(&tid, NULL, worker, (void *)i); if (ret) FATAL("pthread_create() ...
