Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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