| /* |
| * |
| * Copyright 2015, Google Inc. |
| * 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 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. |
| * |
| */ |
| |
| #ifndef GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H |
| #define GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H |
| |
| #include <grpc/impl/codegen/sync.h> |
| |
| namespace grpc { |
| |
| template <class mutex> |
| class lock_guard; |
| class condition_variable; |
| |
| class mutex { |
| public: |
| mutex() { gpr_mu_init(&mu_); } |
| ~mutex() { gpr_mu_destroy(&mu_); } |
| |
| private: |
| ::gpr_mu mu_; |
| template <class mutex> |
| friend class lock_guard; |
| friend class condition_variable; |
| }; |
| |
| template <class mutex> |
| class lock_guard { |
| public: |
| lock_guard(mutex &mu) : mu_(mu), locked(true) { gpr_mu_lock(&mu.mu_); } |
| ~lock_guard() { unlock_internal(); } |
| |
| protected: |
| void lock_internal() { |
| if (!locked) gpr_mu_lock(&mu_.mu_); |
| locked = true; |
| } |
| void unlock_internal() { |
| if (locked) gpr_mu_unlock(&mu_.mu_); |
| locked = false; |
| } |
| |
| private: |
| mutex &mu_; |
| bool locked; |
| friend class condition_variable; |
| }; |
| |
| template <class mutex> |
| class unique_lock : public lock_guard<mutex> { |
| public: |
| unique_lock(mutex &mu) : lock_guard<mutex>(mu) {} |
| void lock() { this->lock_internal(); } |
| void unlock() { this->unlock_internal(); } |
| }; |
| |
| class condition_variable { |
| public: |
| condition_variable() { gpr_cv_init(&cv_); } |
| ~condition_variable() { gpr_cv_destroy(&cv_); } |
| void wait(lock_guard<mutex> &mu) { |
| mu.locked = false; |
| gpr_cv_wait(&cv_, &mu.mu_.mu_, gpr_inf_future(GPR_CLOCK_REALTIME)); |
| mu.locked = true; |
| } |
| void notify_one() { gpr_cv_signal(&cv_); } |
| void notify_all() { gpr_cv_broadcast(&cv_); } |
| |
| private: |
| gpr_cv cv_; |
| }; |
| |
| } // namespace grpc |
| |
| #endif // GRPCXX_IMPL_CODEGEN_SYNC_NO_CXX11_H |