mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-08 00:16:11 +00:00
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/* Test whether detached threads are handled properly. */
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#include <assert.h>
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#include <limits.h> /* PTHREAD_STACK_MIN */
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#include <pthread.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 int s_finished_count; /* protected by s_mutex */
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static pthread_mutex_t s_mutex;
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static pthread_cond_t s_cond;
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static void increment_finished_count()
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{
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pthread_mutex_lock(&s_mutex);
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s_finished_count++;
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pthread_cond_signal(&s_cond);
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pthread_mutex_unlock(&s_mutex);
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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 i;
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int detachstate;
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pthread_attr_t attr;
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pthread_mutex_init(&s_mutex, 0);
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pthread_cond_init(&s_cond, 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, PTHREAD_STACK_MIN + 4096);
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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, NULL);
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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, NULL);
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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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pthread_mutex_lock(&s_mutex);
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while (s_finished_count < count1 + count2) {
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const int ret = pthread_cond_wait(&s_cond, &s_mutex);
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assert(ret == 0);
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}
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pthread_mutex_unlock(&s_mutex);
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pthread_cond_destroy(&s_cond);
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pthread_mutex_destroy(&s_mutex);
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write(STDOUT_FILENO, "\n", 1);
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fprintf(stderr, "Done.\n");
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return 0;
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}
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