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pthread_tid.c
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pthread_tid.c
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/*
Print thread TID and other info for multiple threads.
*/
#include "common.h"
pthread_mutex_t main_thread_mutex = PTHREAD_MUTEX_INITIALIZER;
void* main_thread(void *arg) {
int argument;
argument = *((int*)arg);
printf("tid = %d\n", argument);
printf(" getpid() = %ju\n", (uintmax_t)getpid());
printf(" pthread_self() = %ju\n", (uintmax_t)pthread_self());
return NULL;
}
int main(void) {
enum NUM_THREADS {NUM_THREADS = 5};
pthread_t threads[NUM_THREADS];
int thread_args[NUM_THREADS];
int rc, i;
/* Create all threads */
for (i = 0; i < NUM_THREADS; ++i) {
thread_args[i] = i;
rc = pthread_create(&threads[i], NULL, main_thread, (void*)&thread_args[i]);
assert(rc == 0);
printf("tid: %ju\n", (uintmax_t)threads[i]);
}
/* Wait for all threads to complete */
for (i = 0; i < NUM_THREADS; ++i) {
rc = pthread_join(threads[i], NULL);
if (rc != 0) {
printf("%s\n", strerror(rc));
exit(EXIT_FAILURE);
}
}
return EXIT_SUCCESS;
}