mirror of
https://github.com/ioacademy-jikim/debugging
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91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/**
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* Test whether detached threads are handled properly.
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* This test program is based on pth_detached.c, with the difference that
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* in this test program the main thread uses a counting semaphore instead
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* of a counter protected by a mutex to wait until all detached threads
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* finished.
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*/
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#include <assert.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static sem_t s_sem;
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static void increment_finished_count()
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{
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sem_post(&s_sem);
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}
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static void* thread_func1(void* arg)
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{
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write(STDOUT_FILENO, ".", 1);
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increment_finished_count();
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return 0;
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}
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static void* thread_func2(void* arg)
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{
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pthread_detach(pthread_self());
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write(STDOUT_FILENO, ".", 1);
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increment_finished_count();
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return 0;
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}
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int main(int argc, char** argv)
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{
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const int count1 = argc > 1 ? atoi(argv[1]) : 100;
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const int count2 = argc > 2 ? atoi(argv[2]) : 100;
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int thread_arg[count1 > count2 ? count1 : count2];
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int i;
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int detachstate;
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pthread_attr_t attr;
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for (i = 0; i < count1 || i < count2; i++)
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thread_arg[i] = i;
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sem_init(&s_sem, 0, 0);
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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assert(pthread_attr_getdetachstate(&attr, &detachstate) == 0);
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assert(detachstate == PTHREAD_CREATE_DETACHED);
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pthread_attr_setstacksize(&attr, 16384);
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// Create count1 detached threads by setting the "detached" property via
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// thread attributes.
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for (i = 0; i < count1; i++)
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{
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pthread_t thread;
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pthread_create(&thread, &attr, thread_func1, &thread_arg[i]);
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}
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// Create count2 detached threads by letting the threads detach themselves.
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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assert(pthread_attr_getdetachstate(&attr, &detachstate) == 0);
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assert(detachstate == PTHREAD_CREATE_JOINABLE);
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for (i = 0; i < count2; i++)
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{
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pthread_t thread;
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pthread_create(&thread, &attr, thread_func2, &thread_arg[i]);
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}
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pthread_attr_destroy(&attr);
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// Wait until all detached threads have written their output to stdout.
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for (i = 0; i < count1 + count2; i++)
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{
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sem_wait(&s_sem);
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}
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write(STDOUT_FILENO, "\n", 1);
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fprintf(stderr, "Done.\n");
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sem_destroy(&s_sem);
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return 0;
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}
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