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Viewing changes to libclamav/c++/llvm/lib/System/Win32/RWMutex.inc

  • Committer: Bazaar Package Importer
  • Author(s): Kees Cook
  • Date: 2007-02-20 10:33:44 UTC
  • mto: This revision was merged to the branch mainline in revision 16.
  • Revision ID: james.westby@ubuntu.com-20070220103344-zgcu2psnx9d98fpa
Tags: upstream-0.90
Import upstream version 0.90

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libclamav/c++/llvm/lib/System/Win32/RWMutex.inc
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//= 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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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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}