lib/System/Win32/Mutex.inc

   1 //===- llvm/System/Win32/Mutex.inc - Win32 Mutex Implementation -*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by Jeff Cohen and is distributed under the
   6 // University of Illinois Open Source 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 "Win32.h"
  20 #include "llvm/System/Mutex.h"
  21
  22 namespace llvm {
  23 using namespace sys;
  24
  25 Mutex::Mutex(bool /*recursive*/)
  26 {
  27   data_ = new CRITICAL_SECTION;
  28   InitializeCriticalSection((LPCRITICAL_SECTION)data_);
  29 }
  30
  31 Mutex::~Mutex()
  32 {
  33   DeleteCriticalSection((LPCRITICAL_SECTION)data_);
  34   data_ = 0;
  35 }
  36
  37 bool
  38 Mutex::acquire()
  39 {
  40   EnterCriticalSection((LPCRITICAL_SECTION)data_);
  41   return true;
  42 }
  43
  44 bool
  45 Mutex::release()
  46 {
  47   LeaveCriticalSection((LPCRITICAL_SECTION)data_);
  48   return true;
  49 }
  50
  51 bool
  52 Mutex::tryacquire()
  53 {
  54   return TryEnterCriticalSection((LPCRITICAL_SECTION)data_);
  55 }
  56
  57 }