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/instance_handle.h" 15 #include "ppapi/cpp/message_loop.h" 16 17 namespace 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. 21 class 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&, void* user_data); 30 31 explicit SimpleThread(const InstanceHandle& instance); 32 explicit SimpleThread(const InstanceHandle& instance, size_t stacksize); 33 ~SimpleThread(); 34 35 // Starts a thread and runs a message loop in it. If you need control over 36 // how the message loop is run, use StartWithFunction. Returns true on 37 // success, false if the thread is already running or couldn't be started. 38 bool Start(); 39 40 // Posts a quit message to the message loop and blocks until the thread 41 // exits. Returns true on success. If the thread is not running, returns 42 // false. 43 bool Join(); 44 45 // Normally you can just use Start() to start a thread, and then post work to 46 // it. In some cases you will want control over the message. If ThreadFunc 47 // is NULL, this acts the same as Start(). 48 bool StartWithFunction(ThreadFunc func, void* user_data); 49 message_loop()50 MessageLoop& message_loop() { return message_loop_; } thread()51 ThreadHandle thread() const { return thread_; } 52 53 private: 54 InstanceHandle instance_; 55 MessageLoop message_loop_; 56 const size_t stacksize_; 57 ThreadHandle thread_; 58 59 // Disallow (not implemented). 60 SimpleThread(const SimpleThread&); 61 SimpleThread(const SimpleThread&, size_t stacksize); 62 SimpleThread& operator=(const SimpleThread&); 63 }; 64 65 } // namespace pp 66 67 #endif // PPAPI_UTILITY_THREADING_SIMPLE_THREAD_H_ 68 69