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