mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-25 05:41:12 +00:00
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* Small helper class for asserting uses of a class are non-reentrant. */
|
|
|
|
#ifndef mozilla_ReentrancyGuard_h
|
|
#define mozilla_ReentrancyGuard_h
|
|
|
|
#include "mozilla/Assertions.h"
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/GuardObjects.h"
|
|
|
|
namespace mozilla {
|
|
|
|
/* Useful for implementing containers that assert non-reentrancy */
|
|
class ReentrancyGuard
|
|
{
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
#ifdef DEBUG
|
|
bool& mEntered;
|
|
#endif
|
|
|
|
public:
|
|
template<class T>
|
|
#ifdef DEBUG
|
|
ReentrancyGuard(T& aObj
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: mEntered(aObj.mEntered)
|
|
#else
|
|
ReentrancyGuard(T&
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
#endif
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
#ifdef DEBUG
|
|
MOZ_ASSERT(!mEntered);
|
|
mEntered = true;
|
|
#endif
|
|
}
|
|
~ReentrancyGuard()
|
|
{
|
|
#ifdef DEBUG
|
|
mEntered = false;
|
|
#endif
|
|
}
|
|
|
|
private:
|
|
ReentrancyGuard(const ReentrancyGuard&) MOZ_DELETE;
|
|
void operator=(const ReentrancyGuard&) MOZ_DELETE;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif /* mozilla_ReentrancyGuard_h */
|