1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
//= llvm/Support/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;
}
}
|
