lib/Support/Windows/Mutex.inc

   1 //===- llvm/Support/Win32/Mutex.inc - Win32 Mutex Implementation -*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file implements the Win32 specific (non-pthread) Mutex class.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 //===----------------------------------------------------------------------===//
  14 //=== WARNING: Implementation here must contain only generic Win32 code that
  15 //===          is guaranteed to work on *all* Win32 variants.
  16 //===----------------------------------------------------------------------===//
  17
  18 #include "WindowsSupport.h"
  19 #include "llvm/Support/Mutex.h"
  20
  21 namespace llvm {
  22
  23 sys::MutexImpl::MutexImpl(bool /*recursive*/)
  24 {
  25   data_ = new CRITICAL_SECTION;
  26   InitializeCriticalSection((LPCRITICAL_SECTION)data_);
  27 }
  28
  29 sys::MutexImpl::~MutexImpl()
  30 {
  31   DeleteCriticalSection((LPCRITICAL_SECTION)data_);
  32   delete (LPCRITICAL_SECTION)data_;
  33   data_ = 0;
  34 }
  35
  36 bool
  37 sys::MutexImpl::acquire()
  38 {
  39   EnterCriticalSection((LPCRITICAL_SECTION)data_);
  40   return true;
  41 }
  42
  43 bool
  44 sys::MutexImpl::release()
  45 {
  46   LeaveCriticalSection((LPCRITICAL_SECTION)data_);
  47   return true;
  48 }
  49
  50 bool
  51 sys::MutexImpl::tryacquire()
  52 {
  53   return TryEnterCriticalSection((LPCRITICAL_SECTION)data_);
  54 }
  55
  56 }