| // 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 |