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+/*
+ * 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() WSREP_OVERRIDE
+ {
+ 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