Added inter thread communication lib

git-svn-id: svn://db.shs.com.ru/pip@858 12ceb7fc-bf1f-11e4-8940-5bc7170c53b5

src_concurrent/executor.cpp

@@ -0,0 +1,50 @@
+//
+// Created by fomenko on 23.09.2019.
+//
+
+#include "executor.h"
+
+PIThreadPoolExecutor::PIThreadPoolExecutor(size_t corePoolSize, PIBlockingDequeue<std::function<void()>> *taskQueue_,
+                                           PIThreadFactory *threadFactory) : isShutdown_(false), taskQueue(taskQueue_), threadFactory(threadFactory) {
+    for (size_t i = 0; i < corePoolSize; ++i) {
+        AbstractThread* thread = threadFactory->newThread([&, i](){
+            auto runnable = taskQueue->poll(100, std::function<void()>());
+            if (runnable) {
+                runnable();
+            } else if (isShutdown_) threadPool[i]->stop();
+        });
+        threadPool.push_back(thread);
+        thread->start();
+    }
+}
+
+bool PIThreadPoolExecutor::awaitTermination(int timeoutMs) {
+    PITimeMeasurer measurer;
+    for (size_t i = 0; i < threadPool.size(); ++i) {
+        int dif = timeoutMs - (int)measurer.elapsed_m();
+        if (dif < 0) return false;
+        if (!threadPool[i]->waitForFinish(dif)) return false;
+    }
+    return true;
+}
+
+void PIThreadPoolExecutor::shutdownNow() {
+    isShutdown_ = true;
+    for (size_t i = 0; i < threadPool.size(); ++i) threadPool[i]->stop();
+}
+
+PIThreadPoolExecutor::~PIThreadPoolExecutor() {
+    shutdownNow();
+    taskQueue->getConditionVar()->notifyAll();
+    while (threadPool.size() > 0) delete threadPool.take_back();
+    delete threadFactory;
+    delete taskQueue;
+}
+
+void PIThreadPoolExecutor::execute(const std::function<void()> &runnable) {
+    if (!isShutdown_) taskQueue->offer(runnable);
+}
+
+volatile bool PIThreadPoolExecutor::isShutdown() const {
+    return isShutdown_;
+}