8008ce25e9
This patch adds some pthread and C++11 std::thread unit tests. Change-Id: I9706b542e5fa927a87c6e8ae2a6330fab7bb5d72 Reviewed-on: https://gem5-review.googlesource.com/8221 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Brandon Potter <Brandon.Potter@amd.com>
112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2018, Cornell University
|
|
* 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.
|
|
*
|
|
* Neither the name of Cornell University nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* 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 HOLDER 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.
|
|
*
|
|
* Author: Moyang Wang
|
|
*/
|
|
|
|
#include <pthread.h>
|
|
|
|
#include <cstdlib>
|
|
#include <iostream>
|
|
#include <mutex>
|
|
#include <vector>
|
|
|
|
//------------------------------------------------------------------------
|
|
// Test pthread_cond
|
|
//------------------------------------------------------------------------
|
|
// The master thread creates N threads, each of which waits on a
|
|
// condition variable of a signal to start. The master thread then set
|
|
// the signal and notifies all other threads to begin.
|
|
|
|
#define MAX_N_WORKER_THREADS 10
|
|
|
|
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
|
|
|
|
bool ready = false;
|
|
|
|
void* print_id( void* arg_vptr )
|
|
{
|
|
pthread_mutex_lock( &mutex );
|
|
long id = (long)arg_vptr;
|
|
|
|
while (!ready) {
|
|
pthread_cond_wait( &cv, &mutex );
|
|
}
|
|
// ...
|
|
std::cout << "thread " << id << '\n';
|
|
|
|
pthread_mutex_unlock( &mutex );
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void go()
|
|
{
|
|
pthread_mutex_lock( &mutex );
|
|
ready = true;
|
|
pthread_cond_broadcast( &cv );
|
|
pthread_mutex_unlock( &mutex );
|
|
}
|
|
|
|
int main( int argc, char* argv[] )
|
|
{
|
|
size_t n_worker_threads = 0;
|
|
|
|
std::vector< pthread_t > threads( MAX_N_WORKER_THREADS );
|
|
|
|
int ret = 0;
|
|
for ( size_t i = 0; i < MAX_N_WORKER_THREADS; i++ ){
|
|
ret = pthread_create( &threads[i], nullptr, print_id, (void*)i );
|
|
if (ret != 0) {
|
|
break;
|
|
}
|
|
n_worker_threads++;
|
|
}
|
|
|
|
std::cout << n_worker_threads << " threads ready to race...\n";
|
|
|
|
go();
|
|
|
|
for ( size_t i = 1; i < n_worker_threads; i++ ) {
|
|
pthread_join( threads[i], nullptr );
|
|
}
|
|
|
|
if (n_worker_threads < 1) {
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|