FunctionRunner Utility Class.
Runs arbitrary functions of form 'void(void)' and 'void*(void*)'
without need to create custom Runnable classes.
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@666360 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/concurrency/FunctionRunner.h b/lib/cpp/src/concurrency/FunctionRunner.h
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+++ b/lib/cpp/src/concurrency/FunctionRunner.h
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+// Copyright (c) 2008- Facebook
+// Distributed under the Thrift Software License
+//
+// See accompanying file LICENSE or visit the Thrift site at:
+// http://developers.facebook.com/thrift/
+
+#ifndef _THRIFT_CONCURRENCY_FUNCTION_RUNNER_H
+#define _THRIFT_CONCURRENCY_FUNCTION_RUNNER_H 1
+
+#include <tr1/functional>
+#include "thrift/lib/cpp/concurrency/Thread.h"
+
+namespace facebook { namespace thrift { namespace concurrency {
+
+/**
+ * Convenient implementation of Runnable that will execute arbitrary callbacks.
+ * Interfaces are provided to accept both a generic 'void(void)' callback, and
+ * a 'void* (void*)' pthread_create-style callback.
+ *
+ * Example use:
+ * void* my_thread_main(void* arg);
+ * shared_ptr<ThreadFactory> factory = ...;
+ * shared_ptr<Thread> thread =
+ * factory->newThread(shared_ptr<FunctionRunner>(
+ * new FunctionRunner(my_thread_main, some_argument)));
+ * thread->start();
+ *
+ *
+ * @author mrabkin
+ */
+
+class FunctionRunner : public Runnable {
+ public:
+ // This is the type of callback 'pthread_create()' expects.
+ typedef void* (*PthreadFuncPtr)(void *arg);
+ // This a fully-generic void(void) callback for custom bindings.
+ typedef std::tr1::function<void()> VoidFunc;
+
+ /**
+ * Given a 'pthread_create' style callback, this FunctionRunner will
+ * execute the given callback. Note that the 'void*' return value is ignored.
+ */
+ FunctionRunner(PthreadFuncPtr func, void* arg)
+ : func_(std::tr1::bind(func, arg))
+ { }
+
+ /**
+ * Given a generic callback, this FunctionRunner will execute it.
+ */
+ FunctionRunner(const VoidFunc& cob)
+ : func_(cob)
+ { }
+
+
+ void run() {
+ func_();
+ }
+
+ private:
+ VoidFunc func_;
+};
+
+}}} // facebook::thrift::concurrency
+
+#endif // #ifndef _THRIFT_CONCURRENCY_FUNCTION_RUNNER_H