mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef BASE_AT_EXIT_H_
|
|
#define BASE_AT_EXIT_H_
|
|
|
|
#include "base/base_export.h"
|
|
#include "base/callback.h"
|
|
#include "base/containers/stack.h"
|
|
#include "base/macros.h"
|
|
#include "base/synchronization/lock.h"
|
|
|
|
namespace base {
|
|
|
|
// This class provides a facility similar to the CRT atexit(), except that
|
|
// we control when the callbacks are executed. Under Windows for a DLL they
|
|
// happen at a really bad time and under the loader lock. This facility is
|
|
// mostly used by base::Singleton.
|
|
//
|
|
// The usage is simple. Early in the main() or WinMain() scope create an
|
|
// AtExitManager object on the stack:
|
|
// int main(...) {
|
|
// base::AtExitManager exit_manager;
|
|
//
|
|
// }
|
|
// When the exit_manager object goes out of scope, all the registered
|
|
// callbacks and singleton destructors will be called.
|
|
|
|
class BASE_EXPORT AtExitManager {
|
|
public:
|
|
typedef void (*AtExitCallbackType)(void*);
|
|
|
|
AtExitManager();
|
|
|
|
// The dtor calls all the registered callbacks. Do not try to register more
|
|
// callbacks after this point.
|
|
~AtExitManager();
|
|
|
|
// Registers the specified function to be called at exit. The prototype of
|
|
// the callback function is void func(void*).
|
|
static void RegisterCallback(AtExitCallbackType func, void* param);
|
|
|
|
// Registers the specified task to be called at exit.
|
|
static void RegisterTask(base::Closure task);
|
|
|
|
// Calls the functions registered with RegisterCallback in LIFO order. It
|
|
// is possible to register new callbacks after calling this function.
|
|
static void ProcessCallbacksNow();
|
|
|
|
// Disable all registered at-exit callbacks. This is used only in a single-
|
|
// process mode.
|
|
static void DisableAllAtExitManagers();
|
|
|
|
protected:
|
|
// This constructor will allow this instance of AtExitManager to be created
|
|
// even if one already exists. This should only be used for testing!
|
|
// AtExitManagers are kept on a global stack, and it will be removed during
|
|
// destruction. This allows you to shadow another AtExitManager.
|
|
explicit AtExitManager(bool shadow);
|
|
|
|
private:
|
|
base::Lock lock_;
|
|
base::stack<base::Closure> stack_;
|
|
bool processing_callbacks_;
|
|
AtExitManager* next_manager_; // Stack of managers to allow shadowing.
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(AtExitManager);
|
|
};
|
|
|
|
#if defined(UNIT_TEST)
|
|
class ShadowingAtExitManager : public AtExitManager {
|
|
public:
|
|
ShadowingAtExitManager() : AtExitManager(true) {}
|
|
};
|
|
#endif // defined(UNIT_TEST)
|
|
|
|
} // namespace base
|
|
|
|
#endif // BASE_AT_EXIT_H_
|