forked from OSchip/llvm-project
59 lines
1.7 KiB
PHP
59 lines
1.7 KiB
PHP
//= llvm/System/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 "Win32.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 pthreads implementation for Windows.
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namespace llvm {
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using namespace sys;
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RWMutex::RWMutex() {
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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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RWMutex::~RWMutex() {
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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 RWMutex::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 RWMutex::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 RWMutex::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 RWMutex::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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