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//= llvm/System/Win32/Mutex.inc - Win32 Reader/Writer Mutual Exclusion Lock =//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Win32 specific (non-pthread) RWMutex class.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only generic Win32 code that
//=== is guaranteed to work on *all* Win32 variants.
//===----------------------------------------------------------------------===//
#include "Win32.h"
namespace llvm {
using namespace sys;
RWMutex::RWMutex() {
data_ = new PSRWLOCK;
InitializeSRWLock((PSRWLOCK*)data_);
}
RWMutex::~RWMutex() {
delete (PSRWLOCK*)data_;
data_ = 0;
}
bool RWMutex::reader_acquire() {
AcquireSRWLockShared((PSRWLOCK*)data_);
return true;
}
bool RWMutex::reader_release() {
ReleaseSRWLockShared((PSRWLOCK*)data_);
return true;
}
bool RWMutex::writer_acquire() {
AcquireSRWLockExclusive((PSRWLOCK*)data_);
return true;
}
bool RWMutex::writer_release() {
ReleaseSRWLockExclusive((PSRWLOCK*)data_);
return true;
}
}
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