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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 */
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