LCOV - code coverage report
Current view: top level - mfbt - ReentrancyGuard.h (source / functions) Hit Total Coverage
Test: output.info Lines: 10 10 100.0 %
Date: 2017-07-14 16:53:18 Functions: 332 734 45.2 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : /* Small helper class for asserting uses of a class are non-reentrant. */
       8             : 
       9             : #ifndef mozilla_ReentrancyGuard_h
      10             : #define mozilla_ReentrancyGuard_h
      11             : 
      12             : #include "mozilla/Assertions.h"
      13             : #include "mozilla/Attributes.h"
      14             : #include "mozilla/GuardObjects.h"
      15             : 
      16             : namespace mozilla {
      17             : 
      18             : /* Useful for implementing containers that assert non-reentrancy */
      19             : class MOZ_RAII ReentrancyGuard
      20             : {
      21             :   MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
      22             : #ifdef DEBUG
      23             :   bool& mEntered;
      24             : #endif
      25             : 
      26             : public:
      27             :   template<class T>
      28             : #ifdef DEBUG
      29     8800032 :   explicit ReentrancyGuard(T& aObj
      30             :                            MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
      31     8800032 :     : mEntered(aObj.mEntered)
      32             : #else
      33             :   explicit ReentrancyGuard(T&
      34             :                            MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
      35             : #endif
      36             :   {
      37     8800039 :     MOZ_GUARD_OBJECT_NOTIFIER_INIT;
      38             : #ifdef DEBUG
      39     8800079 :     MOZ_ASSERT(!mEntered);
      40     8800079 :     mEntered = true;
      41             : #endif
      42     8800079 :   }
      43     8873051 :   ~ReentrancyGuard()
      44     8873051 :   {
      45             : #ifdef DEBUG
      46     8873051 :     mEntered = false;
      47             : #endif
      48     8871602 :   }
      49             : 
      50             : private:
      51             :   ReentrancyGuard(const ReentrancyGuard&) = delete;
      52             :   void operator=(const ReentrancyGuard&) = delete;
      53             : };
      54             : 
      55             : } // namespace mozilla
      56             : 
      57             : #endif /* mozilla_ReentrancyGuard_h */

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