71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/****************************** Module Header ******************************\
|
|
* Module Name: ThreadPool.h
|
|
* Project: CppWindowsService
|
|
* Copyright (c) Microsoft Corporation.
|
|
*
|
|
* The class was designed by Kenny Kerr. It provides the ability to queue
|
|
* simple member functions of a class to the Windows thread pool.
|
|
*
|
|
* Using the thread pool is simple and feels natural in C++.
|
|
*
|
|
* class FDBService
|
|
* {
|
|
* public:
|
|
*
|
|
* void AsyncRun()
|
|
* {
|
|
* CThreadPool::QueueUserWorkItem(&Service::Run, this);
|
|
* }
|
|
*
|
|
* void Run()
|
|
* {
|
|
* // Some lengthy operation
|
|
* }
|
|
* };
|
|
*
|
|
* Kenny Kerr spends most of his time designing and building distributed
|
|
* applications for the Microsoft Windows platform. He also has a particular
|
|
* passion for C++ and security programming. Reach Kenny at
|
|
* http://weblogs.asp.net/kennykerr/ or visit his Web site:
|
|
* http://www.kennyandkarin.com/Kenny/.
|
|
*
|
|
* This source is subject to the Microsoft Public License.
|
|
* See http://www.microsoft.com/en-us/openness/resources/licenses.aspx#MPL.
|
|
* All other rights reserved.
|
|
*
|
|
* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
|
|
* EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
|
|
\***************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
#include <memory>
|
|
|
|
class CThreadPool {
|
|
public:
|
|
template <typename T>
|
|
static void QueueUserWorkItem(void (T::*function)(void), T* object, ULONG flags = WT_EXECUTELONGFUNCTION) {
|
|
typedef std::pair<void (T::*)(), T*> CallbackType;
|
|
std::unique_ptr<CallbackType> p(new CallbackType(function, object));
|
|
|
|
if (::QueueUserWorkItem(ThreadProc<T>, p.get(), flags)) {
|
|
// The ThreadProc now has the responsibility of deleting the pair.
|
|
p.release();
|
|
} else {
|
|
throw GetLastError();
|
|
}
|
|
}
|
|
|
|
private:
|
|
template <typename T>
|
|
static DWORD WINAPI ThreadProc(PVOID context) {
|
|
typedef std::pair<void (T::*)(), T*> CallbackType;
|
|
|
|
std::unique_ptr<CallbackType> p(static_cast<CallbackType*>(context));
|
|
|
|
(p->second->*p->first)();
|
|
return 0;
|
|
}
|
|
};
|