new class PIThreadPoolLoop

libs/main/thread/pithreadpoolloop.h

@@ -0,0 +1,69 @@
+/*! @file pithreadpoolloop.h
+ * @brief Thread pool loop
+ * 
+ * This file declare thread class and some wait functions
+*/
+/*
+	PIP - Platform Independent Primitives
+	Thread pool loop
+	Ivan Pelipenko peri4ko@yandex.ru
+
+	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 PITHREADPOOLLOOP_H
+#define PITHREADPOOLLOOP_H
+
+#include "pivector.h"
+
+class PIThread;
+
+class PIP_EXPORT PIThreadPoolLoop {
+public:
+
+	//! Contructs thread pool with threads count "thread_cnt".
+	//! If "thread_cnt" = -1 then system processors count used
+	PIThreadPoolLoop(int thread_cnt = -1);
+
+	virtual ~PIThreadPoolLoop();
+
+	//! Set threads function to "f" with format [](int){...}
+	void setFunction(std::function<void(int)> f);
+
+	//! Wait for all threads stop
+	void wait();
+
+	//! Start functions execution with integer argument range
+	//! from "index_start" to "index_start + index_count - 1"
+	void start(int index_start, int index_count);
+
+	//! Start functions execution with integer argument range
+	//! from "index_start" to "index_start + index_count - 1"
+	//! and wait for finish
+	void exec(int index_start, int index_count);
+
+	//! Start functions "f" execution with integer argument range
+	//! from "index_start" to "index_start + index_count - 1"
+	//! and wait for finish
+	void exec(int index_start, int index_count, std::function<void(int)> f);
+
+private:
+	PIVector<PIThread * > threads;
+	std::function<void(int)> func;
+	std::atomic_int counter;
+
+};
+
+
+#endif