merged concurrent to main library

removed PIConditionLock, use PIMutex instead

lib/main/thread/pithreadpoolexecutor.h

@@ -0,0 +1,63 @@
+/*
+	PIP - Platform Independent Primitives
+	
+	Stephan Fomenko
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program 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 Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef PITHREADPOOLEXECUTOR_H
+#define PITHREADPOOLEXECUTOR_H
+
+#include "piblockingdequeue.h"
+#include <atomic>
+
+
+class PIThreadPoolExecutor {
+public:
+	explicit PIThreadPoolExecutor(size_t corePoolSize = -1, PIBlockingDequeue<std::function<void()> > * taskQueue_ = 0);
+
+	virtual ~PIThreadPoolExecutor();
+
+	/**
+	 * @brief Executes the given task sometime in the future. The task execute in an existing pooled thread. If the task
+	 * cannot be submitted for execution, either because this executor has been shutdown or because its capacity has been
+	 * reached.
+	 *
+	 * @param runnable not empty function for thread pool execution
+	 */
+	void execute(const std::function<void()> & runnable);
+
+	void shutdownNow();
+
+	/**
+	 * @brief Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be
+	 * accepted. Invocation has no additional effect if already shut down. This method does not wait for previously
+	 * submitted tasks to complete execution. Use awaitTermination to do that.
+	 */
+	void shutdown();
+
+	bool isShutdown() const;
+
+	bool awaitTermination(int timeoutMs);
+
+private:
+	std::atomic_bool isShutdown_;
+	PIBlockingDequeue<std::function<void()> > * taskQueue;
+	PIVector<PIThread*> threadPool;
+	bool queue_own;
+
+};
+
+#endif // PITHREADPOOLEXECUTOR_H