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