M7350/system/extras/tests/bionic/libc/common/test_pthread_once.c
2024-09-09 08:57:42 +00:00

83 lines
2.4 KiB
C

/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define N_THREADS 100
static pthread_once_t once = PTHREAD_ONCE_INIT;
static int global_count = 0;
static void
once_function( void )
{
struct timespec ts;
global_count += 1;
ts.tv_sec = 2;
ts.tv_nsec = 0;
nanosleep (&ts, NULL);
}
static void*
thread_function(void* arg)
{
pthread_once( &once, once_function );
if (global_count != 1) {
printf ("thread %ld: global == %d\n", (long int) arg, global_count);
exit (1);
}
return NULL;
}
int main( void )
{
pthread_t threads[N_THREADS];
int nn;
for (nn = 0; nn < N_THREADS; nn++) {
if (pthread_create( &threads[nn], NULL, thread_function, (void*)(long int)nn) < 0) {
printf("creation of thread %d failed\n", nn);
return 1;
}
}
for (nn = 0; nn < N_THREADS; nn++) {
if (pthread_join(threads[nn], NULL)) {
printf("joining thread %d failed\n", nn);
return 1;
}
}
return 0;
}