Quelle RecursiveMutex.cpp Sprache: C

/* -*- 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/. */

#include "mozilla/RecursiveMutex.h"

#ifdef XP_WIN
#  include <windows.h>

#  define NativeHandle(m) (reinterpret_cast<CRITICAL_SECTION*>(&m))
#endif

namespace mozilla {

RecursiveMutex::RecursiveMutex(const char* aName)
    : BlockingResourceBase(aName, eRecursiveMutex)
#ifdef DEBUG
      ,
      mOwningThread(nullptr),
      mEntryCount(0)
#endif
{
#ifdef XP_WIN
  // This number was adapted from NSPR.
  static const DWORD sLockSpinCount = 100;

#  if defined(RELEASE_OR_BETA)
  // Vista and later automatically allocate and subsequently leak a debug info
  // object for each critical section that we allocate unless we tell the
  // system not to do that.
  DWORD flags = CRITICAL_SECTION_NO_DEBUG_INFO;
#  else
  DWORD flags = 0;
#  endif
  BOOL r =
      InitializeCriticalSectionEx(NativeHandle(mMutex), sLockSpinCount, flags);
  MOZ_RELEASE_ASSERT(r);
#else
  pthread_mutexattr_t attr;

  MOZ_RELEASE_ASSERT(pthread_mutexattr_init(&attr) == 0,
                     "pthread_mutexattr_init failed");

  MOZ_RELEASE_ASSERT(
      pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) == 0,
      "pthread_mutexattr_settype failed");

  MOZ_RELEASE_ASSERT(pthread_mutex_init(&mMutex, &attr) == 0,
                     "pthread_mutex_init failed");

  MOZ_RELEASE_ASSERT(pthread_mutexattr_destroy(&attr) == 0,
                     "pthread_mutexattr_destroy failed");
#endif
}

RecursiveMutex::~RecursiveMutex() {
#ifdef XP_WIN
  DeleteCriticalSection(NativeHandle(mMutex));
#else
  MOZ_RELEASE_ASSERT(pthread_mutex_destroy(&mMutex) == 0,
                     "pthread_mutex_destroy failed");
#endif
}

void RecursiveMutex::LockInternal() {
#ifdef XP_WIN
  EnterCriticalSection(NativeHandle(mMutex));
#else
  MOZ_RELEASE_ASSERT(pthread_mutex_lock(&mMutex) == 0,
                     "pthread_mutex_lock failed");
#endif
}

void RecursiveMutex::UnlockInternal() {
#ifdef XP_WIN
  LeaveCriticalSection(NativeHandle(mMutex));
#else
  MOZ_RELEASE_ASSERT(pthread_mutex_unlock(&mMutex) == 0,
                     "pthread_mutex_unlock failed");
#endif
}

}  // namespace mozilla

quality100%

¤ Dauer der Verarbeitung: 0.12 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.