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53ca1f3190
from LLVM forever: grep -lR "llvm/System" * | grep -v .svn | xargs sed -ie 's#llvm/System#llvm/Support#g' git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120314 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
//= llvm/Support/Win32/Mutex.inc - Win32 Reader/Writer Mutual Exclusion Lock =//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Win32 specific (non-pthread) RWMutex class.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic Win32 code that
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//=== is guaranteed to work on *all* Win32 variants.
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//===----------------------------------------------------------------------===//
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#include "Windows.h"
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// FIXME: Windows does not have reader-writer locks pre-Vista. If you want
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// real reader-writer locks, you a threads implementation for Windows.
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namespace llvm {
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using namespace sys;
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RWMutexImpl::RWMutexImpl() {
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data_ = calloc(1, sizeof(CRITICAL_SECTION));
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InitializeCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
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}
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RWMutexImpl::~RWMutexImpl() {
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DeleteCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
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free(data_);
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}
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bool RWMutexImpl::reader_acquire() {
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EnterCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
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return true;
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}
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bool RWMutexImpl::reader_release() {
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LeaveCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
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return true;
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}
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bool RWMutexImpl::writer_acquire() {
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EnterCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
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return true;
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}
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bool RWMutexImpl::writer_release() {
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LeaveCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
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return true;
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}
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}
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