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/**************************************************************************
*
* Copyright 2009-2010 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Test case for util_barrier.
*
* The test succeeds if no thread exits before all the other threads reach
* the barrier.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util/os_time.h"
#include "util/u_atomic.h"
#include "util/u_thread.h"
#define NUM_THREADS 10
static int verbosity = 0;
static thrd_t threads[NUM_THREADS];
static util_barrier barrier;
static int thread_ids[NUM_THREADS];
static volatile int waiting = 0;
static volatile int proceeded = 0;
#define LOG(fmt, ...) \
if (verbosity > 0) { \
fprintf(stdout, fmt, ##__VA_ARGS__); \
}
#define CHECK(_cond) \
if (!(_cond)) { \
fprintf(stderr, "%s:%u: `%s` failed\n", __FILE__, __LINE__, #_cond); \
_exit(EXIT_FAILURE); \
}
static int
thread_function(void *thread_data)
{
int thread_id = *((int *) thread_data);
LOG("thread %d starting\n", thread_id);
os_time_sleep(thread_id * 100 * 1000);
LOG("thread %d before barrier\n", thread_id);
CHECK(p_atomic_read(&proceeded) == 0);
p_atomic_inc(&waiting);
util_barrier_wait(&barrier);
CHECK(p_atomic_read(&waiting) == NUM_THREADS);
p_atomic_inc(&proceeded);
LOG("thread %d exiting\n", thread_id);
return 0;
}
int main(int argc, char *argv[])
{
int i;
for (i = 1; i < argc; ++i) {
const char *arg = argv[i];
if (strcmp(arg, "-v") == 0) {
++verbosity;
} else {
fprintf(stderr, "error: unrecognized option `%s`\n", arg);
exit(EXIT_FAILURE);
}
}
// Disable buffering
setbuf(stdout, NULL);
LOG("pipe_barrier_test starting\n");
util_barrier_init(&barrier, NUM_THREADS);
for (i = 0; i < NUM_THREADS; i++) {
thread_ids[i] = i;
threads[i] = u_thread_create(thread_function, (void *) &thread_ids[i]);
}
for (i = 0; i < NUM_THREADS; i++ ) {
thrd_join(threads[i], NULL);
}
CHECK(p_atomic_read(&proceeded) == NUM_THREADS);
util_barrier_destroy(&barrier);
LOG("pipe_barrier_test exiting\n");
return 0;
}
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