lib/Support/Windows/Mutex.inc

   1 //===- llvm/Support/Win32/Mutex.inc - Win32 Mutex Implementation -*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the Win32 specific (non-pthread) Mutex class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 //===----------------------------------------------------------------------===//
  15 //=== WARNING: Implementation here must contain only generic Win32 code that
  16 //===          is guaranteed to work on *all* Win32 variants.
  17 //===----------------------------------------------------------------------===//
  18
  19 #include "WindowsSupport.h"
  20 #include "llvm/Support/Mutex.h"
  21
  22 namespace llvm {
  23 using namespace sys;
  24
  25 MutexImpl::MutexImpl(bool /*recursive*/)
  26 {
  27   data_ = new CRITICAL_SECTION;
  28   InitializeCriticalSection((LPCRITICAL_SECTION)data_);
  29 }
  30
  31 MutexImpl::~MutexImpl()
  32 {
  33   DeleteCriticalSection((LPCRITICAL_SECTION)data_);
  34   delete (LPCRITICAL_SECTION)data_;
  35   data_ = 0;
  36 }
  37
  38 bool
  39 MutexImpl::acquire()
  40 {
  41   EnterCriticalSection((LPCRITICAL_SECTION)data_);
  42   return true;
  43 }
  44
  45 bool
  46 MutexImpl::release()
  47 {
  48   LeaveCriticalSection((LPCRITICAL_SECTION)data_);
  49   return true;
  50 }
  51
  52 bool
  53 MutexImpl::tryacquire()
  54 {
  55   return TryEnterCriticalSection((LPCRITICAL_SECTION)data_);
  56 }
  57
  58 }