103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
// Copyright (C) 2014 The Android Open Source Project
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef EMUGL_COMMON_THREAD_H
|
|
#define EMUGL_COMMON_THREAD_H
|
|
|
|
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#else
|
|
#include <pthread.h>
|
|
#endif
|
|
|
|
#include <stdint.h>
|
|
|
|
namespace emugl {
|
|
|
|
// Wrapper class for platform-specific threads.
|
|
// To create your own thread, define a sub-class of emugl::Thread
|
|
// and override its main() method.
|
|
//
|
|
// For example:
|
|
//
|
|
// class MyThread : public emugl::Thread {
|
|
// public:
|
|
// MyThread() : Thread() {}
|
|
//
|
|
// virtual intptr_t main() {
|
|
// ... main thread loop implementation
|
|
// return 0;
|
|
// }
|
|
// };
|
|
//
|
|
// ...
|
|
//
|
|
// // Create new instance, but does not start it.
|
|
// MyThread* thread = new MyThread();
|
|
//
|
|
// // Start the thread.
|
|
// thread->start();
|
|
//
|
|
// // Wait for thread completion, and gets result into |exitStatus|.
|
|
// int exitStatus;
|
|
// thread->wait(&exitStatus);
|
|
//
|
|
class Thread {
|
|
public:
|
|
// Public constructor.
|
|
Thread();
|
|
|
|
// Virtual destructor.
|
|
virtual ~Thread();
|
|
|
|
// Override this method in your own thread sub-classes. This will
|
|
// be called when start() is invoked on the Thread instance.
|
|
virtual intptr_t main() = 0;
|
|
|
|
// Start a thread instance. Return true on success, false otherwise
|
|
// (e.g. if the thread was already started or terminated).
|
|
bool start();
|
|
|
|
// Wait for thread termination and retrieve exist status into
|
|
// |*exitStatus|. Return true on success, false otherwise.
|
|
// NOTE: |exitStatus| can be NULL.
|
|
bool wait(intptr_t *exitStatus);
|
|
|
|
// Check whether a thread has terminated. On success, return true
|
|
// and sets |*exitStatus|. On failure, return false.
|
|
// NOTE: |exitStatus| can be NULL.
|
|
bool tryWait(intptr_t *exitStatus);
|
|
|
|
private:
|
|
#ifdef _WIN32
|
|
static DWORD WINAPI thread_main(void* arg);
|
|
|
|
HANDLE mThread;
|
|
DWORD mThreadId;
|
|
CRITICAL_SECTION mLock;
|
|
#else // !WIN32
|
|
static void* thread_main(void* arg);
|
|
|
|
pthread_t mThread;
|
|
pthread_mutex_t mLock;
|
|
bool mJoined;
|
|
#endif
|
|
intptr_t mExitStatus;
|
|
bool mIsRunning;
|
|
};
|
|
|
|
} // namespace emugl
|
|
|
|
#endif // EMUGL_COMMON_THREAD_H
|
|
|