/* -*- 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 MOZ_RAII ReentrancyGuard { MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER #ifdef DEBUG bool& mEntered; #endif public: template<class T> #ifdef DEBUG explicit ReentrancyGuard(T& aObj MOZ_GUARD_OBJECT_NOTIFIER_PARAM) : mEntered(aObj.mEntered) #else explicit 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&) = delete; void operator=(const ReentrancyGuard&) = delete; }; } // namespace mozilla #endif /* mozilla_ReentrancyGuard_h */