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480a72812d
CRITICAL_SECTIONs have useful debug info that we'd like to keep around at least on nightly, rather than having diverging signatures on crash stats we'd like to just keep a unified implementation. As we didn't see significant perf improvements after landing we're going to just back this out.
58 lines
1.6 KiB
C++
58 lines
1.6 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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#include "mozilla/Assertions.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/PlatformMutex.h"
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#include <windows.h>
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#include "MutexPlatformData_windows.h"
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mozilla::detail::MutexImpl::MutexImpl()
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{
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// This number was adopted from NSPR.
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const static DWORD LockSpinCount = 1500;
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#if defined(RELEASE_OR_BETA)
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// Vista and later automatically allocate and subsequently leak a debug info
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// object for each critical section that we allocate unless we tell the
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// system not to do that.
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DWORD flags = CRITICAL_SECTION_NO_DEBUG_INFO;
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#else
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DWORD flags = 0;
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#endif // defined(RELEASE_OR_BETA)
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BOOL r = InitializeCriticalSectionEx(&platformData()->criticalSection,
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LockSpinCount, flags);
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MOZ_RELEASE_ASSERT(r);
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}
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mozilla::detail::MutexImpl::~MutexImpl()
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{
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DeleteCriticalSection(&platformData()->criticalSection);
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}
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void
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mozilla::detail::MutexImpl::lock()
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{
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EnterCriticalSection(&platformData()->criticalSection);
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}
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void
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mozilla::detail::MutexImpl::unlock()
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{
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LeaveCriticalSection(&platformData()->criticalSection);
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}
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mozilla::detail::MutexImpl::PlatformData*
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mozilla::detail::MutexImpl::platformData()
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{
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static_assert(sizeof(platformData_) >= sizeof(PlatformData),
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"platformData_ is too small");
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return reinterpret_cast<PlatformData*>(platformData_);
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}
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