1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mfbt/ReentrancyGuard.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,57 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/* Small helper class for asserting uses of a class are non-reentrant. */
1.11 +
1.12 +#ifndef mozilla_ReentrancyGuard_h
1.13 +#define mozilla_ReentrancyGuard_h
1.14 +
1.15 +#include "mozilla/Assertions.h"
1.16 +#include "mozilla/Attributes.h"
1.17 +#include "mozilla/GuardObjects.h"
1.18 +
1.19 +namespace mozilla {
1.20 +
1.21 +/* Useful for implementing containers that assert non-reentrancy */
1.22 +class ReentrancyGuard
1.23 +{
1.24 + MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
1.25 +#ifdef DEBUG
1.26 + bool& entered;
1.27 +#endif
1.28 +
1.29 + public:
1.30 + template<class T>
1.31 +#ifdef DEBUG
1.32 + ReentrancyGuard(T& obj
1.33 + MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
1.34 + : entered(obj.entered)
1.35 +#else
1.36 + ReentrancyGuard(T&
1.37 + MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
1.38 +#endif
1.39 + {
1.40 + MOZ_GUARD_OBJECT_NOTIFIER_INIT;
1.41 +#ifdef DEBUG
1.42 + MOZ_ASSERT(!entered);
1.43 + entered = true;
1.44 +#endif
1.45 + }
1.46 + ~ReentrancyGuard()
1.47 + {
1.48 +#ifdef DEBUG
1.49 + entered = false;
1.50 +#endif
1.51 + }
1.52 +
1.53 + private:
1.54 + ReentrancyGuard(const ReentrancyGuard&) MOZ_DELETE;
1.55 + void operator=(const ReentrancyGuard&) MOZ_DELETE;
1.56 +};
1.57 +
1.58 +} // namespace mozilla
1.59 +
1.60 +#endif /* mozilla_ReentrancyGuard_h */
