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