simple_thread.h revision 5821806d5e7f356e8fa4b058a389a808ea183019
1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef PPAPI_UTILITY_THREADING_SIMPLE_THREAD_H_ 6#define PPAPI_UTILITY_THREADING_SIMPLE_THREAD_H_ 7 8#ifdef WIN32 9#include <windows.h> 10#else 11#include <pthread.h> 12#endif 13 14#include "ppapi/cpp/dev/message_loop_dev.h" 15#include "ppapi/cpp/instance_handle.h" 16 17namespace pp { 18 19// This class is a simple wrapper around a pthread/Windows thread that creates 20// and runs a PPAPI message loop on that thread. 21class SimpleThread { 22 public: 23#ifdef WIN32 24 typedef HANDLE ThreadHandle; 25#else 26 typedef pthread_t ThreadHandle; 27#endif 28 29 typedef void (*ThreadFunc)(MessageLoop_Dev&, void* user_data); 30 31 explicit SimpleThread(const InstanceHandle& instance); 32 ~SimpleThread(); 33 34 // Starts a thread and runs a message loop in it. If you need control over 35 // how the message loop is run, use StartWithFunction. Returns true on 36 // success, false if the thread is already running or couldn't be started. 37 bool Start(); 38 39 // Posts a quit message to the message loop and blocks until the thread 40 // exits. Returns true on success. If the thread is not running, returns 41 // false. 42 bool Join(); 43 44 // Normally you can just use Start() to start a thread, and then post work to 45 // it. In some cases you will want control over the message. If ThreadFunc 46 // is NULL, this acts the same as Start(). 47 bool StartWithFunction(ThreadFunc func, void* user_data); 48 49 MessageLoop_Dev& message_loop() { return message_loop_; } 50 ThreadHandle thread() const { return thread_; } 51 52 private: 53 InstanceHandle instance_; 54 MessageLoop_Dev message_loop_; 55 56 ThreadHandle thread_; 57 58 // Disallow (not implemented). 59 SimpleThread(const SimpleThread&); 60 SimpleThread& operator=(const SimpleThread&); 61}; 62 63} // namespace pp 64 65#endif // PPAPI_UTILITY_THREADING_SIMPLE_THREAD_H_ 66 67