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author | Michael J. Spencer <bigcheesegs@gmail.com> | 2010-11-29 18:16:10 +0000 |
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committer | Michael J. Spencer <bigcheesegs@gmail.com> | 2010-11-29 18:16:10 +0000 |
commit | 1f6efa3996dd1929fbc129203ce5009b620e6969 (patch) | |
tree | 6b782914982f90d3a983bcefef98b8ef68ab2961 /lib/Support/Windows/RWMutex.inc | |
parent | 9363f739cdc3bd02e8516a25de0090f52ae12fbb (diff) | |
download | external_llvm-1f6efa3996dd1929fbc129203ce5009b620e6969.zip external_llvm-1f6efa3996dd1929fbc129203ce5009b620e6969.tar.gz external_llvm-1f6efa3996dd1929fbc129203ce5009b620e6969.tar.bz2 |
Merge System into Support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120298 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/Windows/RWMutex.inc')
-rw-r--r-- | lib/Support/Windows/RWMutex.inc | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/Support/Windows/RWMutex.inc b/lib/Support/Windows/RWMutex.inc new file mode 100644 index 0000000..82ae8af --- /dev/null +++ b/lib/Support/Windows/RWMutex.inc @@ -0,0 +1,58 @@ +//= 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 "Windows.h" + +// FIXME: Windows does not have reader-writer locks pre-Vista. If you want +// real reader-writer locks, you a threads implementation for Windows. + +namespace llvm { +using namespace sys; + +RWMutexImpl::RWMutexImpl() { + data_ = calloc(1, sizeof(CRITICAL_SECTION)); + InitializeCriticalSection(static_cast<LPCRITICAL_SECTION>(data_)); +} + +RWMutexImpl::~RWMutexImpl() { + DeleteCriticalSection(static_cast<LPCRITICAL_SECTION>(data_)); + free(data_); +} + +bool RWMutexImpl::reader_acquire() { + EnterCriticalSection(static_cast<LPCRITICAL_SECTION>(data_)); + return true; +} + +bool RWMutexImpl::reader_release() { + LeaveCriticalSection(static_cast<LPCRITICAL_SECTION>(data_)); + return true; +} + +bool RWMutexImpl::writer_acquire() { + EnterCriticalSection(static_cast<LPCRITICAL_SECTION>(data_)); + return true; +} + +bool RWMutexImpl::writer_release() { + LeaveCriticalSection(static_cast<LPCRITICAL_SECTION>(data_)); + return true; +} + + +} |