| // 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) |
| |
| #ifndef CERES_INTERNAL_SCOPED_THREAD_TOKEN_H_ |
| #define CERES_INTERNAL_SCOPED_THREAD_TOKEN_H_ |
| |
| #include "ceres/internal/export.h" |
| #include "ceres/thread_token_provider.h" |
| |
| namespace ceres::internal { |
| |
| // Helper class for ThreadTokenProvider. This object acquires a token in its |
| // constructor and puts that token back with destruction. |
| class CERES_NO_EXPORT ScopedThreadToken { |
| public: |
| explicit ScopedThreadToken(ThreadTokenProvider* provider) |
| : provider_(provider), token_(provider->Acquire()) {} |
| |
| ~ScopedThreadToken() { provider_->Release(token_); } |
| ScopedThreadToken(ScopedThreadToken&) = delete; |
| ScopedThreadToken& operator=(ScopedThreadToken&) = delete; |
| |
| int token() const { return token_; } |
| |
| private: |
| ThreadTokenProvider* provider_; |
| int token_; |
| }; |
| |
| } // namespace ceres::internal |
| |
| #endif // CERES_INTERNAL_SCOPED_THREAD_TOKEN_H_ |