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Diffstat (limited to '')
-rw-r--r-- | wsrep-lib/include/wsrep/condition_variable.hpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/wsrep-lib/include/wsrep/condition_variable.hpp b/wsrep-lib/include/wsrep/condition_variable.hpp new file mode 100644 index 00000000..25a0e16e --- /dev/null +++ b/wsrep-lib/include/wsrep/condition_variable.hpp @@ -0,0 +1,89 @@ +/* + * Copyright (C) 2018 Codership Oy <info@codership.com> + * + * This file is part of wsrep-lib. + * + * Wsrep-lib is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * Wsrep-lib is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef WSREP_CONDITION_VARIABLE_HPP +#define WSREP_CONDITION_VARIABLE_HPP + +#include "compiler.hpp" +#include "lock.hpp" + +#include <cstdlib> + +namespace wsrep +{ + class condition_variable + { + public: + condition_variable() { } + virtual ~condition_variable() { } + virtual void notify_one() = 0; + virtual void notify_all() = 0; + virtual void wait(wsrep::unique_lock<wsrep::mutex>& lock) = 0; + private: + condition_variable(const condition_variable&); + condition_variable& operator=(const condition_variable&); + }; + + // Default pthreads based condition variable implementation + class default_condition_variable : public condition_variable + { + public: + default_condition_variable() + : cond_() + { + if (pthread_cond_init(&cond_, 0)) + { + throw wsrep::runtime_error("Failed to initialized condvar"); + } + } + + ~default_condition_variable() + { + if (pthread_cond_destroy(&cond_)) + { + ::abort(); + } + } + void notify_one() WSREP_OVERRIDE + { + (void)pthread_cond_signal(&cond_); + } + + void notify_all() WSREP_OVERRIDE + { + (void)pthread_cond_broadcast(&cond_); + } + + void wait(wsrep::unique_lock<wsrep::mutex>& lock) WSREP_OVERRIDE + { + if (pthread_cond_wait( + &cond_, + reinterpret_cast<pthread_mutex_t*>(lock.mutex()->native()))) + { + throw wsrep::runtime_error("Cond wait failed"); + } + } + + private: + pthread_cond_t cond_; + }; + +} + +#endif // WSREP_CONDITION_VARIABLE_HPP |