blob: c7ec67f31aa995231b45e2981693c8e762c33e51 [file] [log] [blame]
// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2017 Google Inc. All rights reserved.
// http://ceres-solver.org/
//
// 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 Google Inc. 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 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.
//
// Author: yp@photonscore.de (Yury Prokazov)
#include "ceres/thread_token_provider.h"
#ifdef CERES_USE_OPENMP
#include <omp.h>
#endif
namespace ceres {
namespace internal {
ThreadTokenProvider::ThreadTokenProvider(int num_threads) {
(void)num_threads;
#ifdef CERES_USE_CXX_THREADS
for (int i = 0; i < num_threads; i++) {
pool_.Push(i);
}
#endif
}
int ThreadTokenProvider::Acquire() {
#ifdef CERES_USE_OPENMP
return omp_get_thread_num();
#endif
#ifdef CERES_NO_THREADS
return 0;
#endif
#ifdef CERES_USE_CXX_THREADS
int thread_id;
CHECK(pool_.Wait(&thread_id));
return thread_id;
#endif
}
void ThreadTokenProvider::Release(int thread_id) {
(void)thread_id;
#ifdef CERES_USE_CXX_THREADS
pool_.Push(thread_id);
#endif
}
} // namespace internal
} // namespace ceres