add PIProtectedVariable

libs/main/thread/piprotectedvariable.h

@@ -0,0 +1,60 @@
+/*! \file piprotectedvariable.h
+ * \ingroup Thread
+ * \~\brief
+ * \~english Thread-safe variable
+ * \~russian Потокобезопасная переменная
+ */
+/*
+	PIP - Platform Independent Primitives
+	Thread-safe variable
+	Ivan Pelipenko peri4ko@yandex.ru, Stephan Fomenko, Andrey Bychkov work.a.b@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 PIPROTECTEDVARIABLE_H
+#define PIPROTECTEDVARIABLE_H
+
+#include "pimutex.h"
+
+
+template<typename T>
+class PIP_EXPORT PIProtectedVariable {
+public:
+	void set(const T & v) {
+		PIMutexLocker _ml(mutex);
+		var = v;
+	}
+	void set(T && v) {
+		PIMutexLocker _ml(mutex);
+		var = std::move(v);
+	}
+	T get() const {
+		PIMutexLocker _ml(mutex);
+		return var;
+	}
+	T & lock() {
+		mutex.lock();
+		return var;
+	}
+	void unlock() { mutex.unlock(); }
+
+
+private:
+	mutable PIMutex mutex;
+	T var;
+};
+
+
+#endif

libs/main/thread/pithreadmodule.h

@@ -55,6 +55,7 @@
 #include "pigrabberbase.h"
 #include "pimutex.h"
 #include "pipipelinethread.h"
+#include "piprotectedvariable.h"
 #include "pispinlock.h"
 #include "pithread.h"
 #include "pithreadnotifier.h"