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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
// StreamBinder.cpp
#include "StdAfx.h"
#include "../../Common/MyCom.h"
#include "StreamBinder.h"
class CBinderInStream:
public ISequentialInStream,
public CMyUnknownImp
{
CStreamBinder *_binder;
public:
MY_UNKNOWN_IMP1(ISequentialInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
~CBinderInStream() { _binder->CloseRead(); }
CBinderInStream(CStreamBinder *binder): _binder(binder) {}
};
STDMETHODIMP CBinderInStream::Read(void *data, UInt32 size, UInt32 *processedSize)
{ return _binder->Read(data, size, processedSize); }
class CBinderOutStream:
public ISequentialOutStream,
public CMyUnknownImp
{
CStreamBinder *_binder;
public:
MY_UNKNOWN_IMP1(ISequentialOutStream)
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
~CBinderOutStream() { _binder->CloseWrite(); }
CBinderOutStream(CStreamBinder *binder): _binder(binder) {}
};
STDMETHODIMP CBinderOutStream::Write(const void *data, UInt32 size, UInt32 *processedSize)
{ return _binder->Write(data, size, processedSize); }
WRes CStreamBinder::CreateEvents()
{
RINOK(_canWrite_Event.Create());
RINOK(_canRead_Event.Create());
return _readingWasClosed_Event.Create();
}
void CStreamBinder::ReInit()
{
_canWrite_Event.Reset();
_canRead_Event.Reset();
_readingWasClosed_Event.Reset();
// _readingWasClosed = false;
_readingWasClosed2 = false;
_waitWrite = true;
_bufSize = 0;
_buf = NULL;
ProcessedSize = 0;
// WritingWasCut = false;
}
void CStreamBinder::CreateStreams(ISequentialInStream **inStream, ISequentialOutStream **outStream)
{
// _readingWasClosed = false;
_readingWasClosed2 = false;
_waitWrite = true;
_bufSize = 0;
_buf = NULL;
ProcessedSize = 0;
// WritingWasCut = false;
CBinderInStream *inStreamSpec = new CBinderInStream(this);
CMyComPtr<ISequentialInStream> inStreamLoc(inStreamSpec);
*inStream = inStreamLoc.Detach();
CBinderOutStream *outStreamSpec = new CBinderOutStream(this);
CMyComPtr<ISequentialOutStream> outStreamLoc(outStreamSpec);
*outStream = outStreamLoc.Detach();
}
// (_canRead_Event && _bufSize == 0) means that stream is finished.
HRESULT CStreamBinder::Read(void *data, UInt32 size, UInt32 *processedSize)
{
if (processedSize)
*processedSize = 0;
if (size != 0)
{
if (_waitWrite)
{
RINOK(_canRead_Event.Lock());
_waitWrite = false;
}
if (size > _bufSize)
size = _bufSize;
if (size != 0)
{
memcpy(data, _buf, size);
_buf = ((const Byte *)_buf) + size;
ProcessedSize += size;
if (processedSize)
*processedSize = size;
_bufSize -= size;
if (_bufSize == 0)
{
_waitWrite = true;
_canRead_Event.Reset();
_canWrite_Event.Set();
}
}
}
return S_OK;
}
HRESULT CStreamBinder::Write(const void *data, UInt32 size, UInt32 *processedSize)
{
if (processedSize)
*processedSize = 0;
if (size == 0)
return S_OK;
if (!_readingWasClosed2)
{
_buf = data;
_bufSize = size;
_canRead_Event.Set();
/*
_canWrite_Event.Lock();
if (_readingWasClosed)
_readingWasClosed2 = true;
*/
HANDLE events[2] = { _canWrite_Event, _readingWasClosed_Event };
DWORD waitResult = ::WaitForMultipleObjects(2, events, FALSE, INFINITE);
if (waitResult >= WAIT_OBJECT_0 + 2)
return E_FAIL;
size -= _bufSize;
if (size != 0)
{
if (processedSize)
*processedSize = size;
return S_OK;
}
// if (waitResult == WAIT_OBJECT_0 + 1)
_readingWasClosed2 = true;
}
// WritingWasCut = true;
return k_My_HRESULT_WritingWasCut;
}
|
