mirror of
https://github.com/encounter/engine.git
synced 2026-03-30 11:09:55 -07:00
Michael Goderbauer
72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// A class for checking that the current thread is/isn't the same as an initial
|
|
// thread.
|
|
|
|
#ifndef FLUTTER_FML_MEMORY_THREAD_CHECKER_H_
|
|
#define FLUTTER_FML_MEMORY_THREAD_CHECKER_H_
|
|
|
|
#include "flutter/fml/build_config.h"
|
|
|
|
#if defined(OS_WIN)
|
|
#include <windows.h>
|
|
#else
|
|
#include <pthread.h>
|
|
#endif
|
|
|
|
#include "flutter/fml/logging.h"
|
|
#include "flutter/fml/macros.h"
|
|
|
|
namespace fml {
|
|
|
|
// A simple class that records the identity of the thread that it was created
|
|
// on, and at later points can tell if the current thread is the same as its
|
|
// creation thread. This class is thread-safe.
|
|
//
|
|
// Note: Unlike Chromium's |base::ThreadChecker|, this is *not* Debug-only (so
|
|
// #ifdef it out if you want something Debug-only). (Rationale: Having a
|
|
// |CalledOnValidThread()| that lies in Release builds seems bad. Moreover,
|
|
// there's a small space cost to having even an empty class. )
|
|
class ThreadChecker final {
|
|
public:
|
|
#if defined(OS_WIN)
|
|
ThreadChecker() : self_(GetCurrentThreadId()) {}
|
|
~ThreadChecker() {}
|
|
|
|
bool IsCreationThreadCurrent() const { return GetCurrentThreadId() == self_; }
|
|
|
|
private:
|
|
DWORD self_;
|
|
|
|
#else
|
|
ThreadChecker() : self_(pthread_self()) {}
|
|
~ThreadChecker() {}
|
|
|
|
// Returns true if the current thread is the thread this object was created
|
|
// on and false otherwise.
|
|
bool IsCreationThreadCurrent() const {
|
|
return !!pthread_equal(pthread_self(), self_);
|
|
}
|
|
|
|
private:
|
|
pthread_t self_;
|
|
#endif
|
|
};
|
|
|
|
// TODO(chinmaygarde): Re-enable this after auditing all new users of
|
|
// fml::WeakPtr.
|
|
#if !defined(NDEBUG) && false
|
|
#define FML_DECLARE_THREAD_CHECKER(c) fml::ThreadChecker c
|
|
#define FML_DCHECK_CREATION_THREAD_IS_CURRENT(c) \
|
|
FML_DCHECK((c).IsCreationThreadCurrent())
|
|
#else
|
|
#define FML_DECLARE_THREAD_CHECKER(c)
|
|
#define FML_DCHECK_CREATION_THREAD_IS_CURRENT(c) ((void)0)
|
|
#endif
|
|
|
|
} // namespace fml
|
|
|
|
#endif // FLUTTER_FML_MEMORY_THREAD_CHECKER_H_
|