1 // StreamBinder.cpp |
|
2 |
|
3 #include "StdAfx.h" |
|
4 |
|
5 #include "StreamBinder.h" |
|
6 #include "../../Common/Defs.h" |
|
7 #include "../../Common/MyCom.h" |
|
8 |
|
9 using namespace NWindows; |
|
10 using namespace NSynchronization; |
|
11 |
|
12 class CSequentialInStreamForBinder: |
|
13 public ISequentialInStream, |
|
14 public CMyUnknownImp |
|
15 { |
|
16 public: |
|
17 MY_UNKNOWN_IMP |
|
18 |
|
19 STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize); |
|
20 private: |
|
21 CStreamBinder *m_StreamBinder; |
|
22 public: |
|
23 ~CSequentialInStreamForBinder() { m_StreamBinder->CloseRead(); } |
|
24 void SetBinder(CStreamBinder *streamBinder) { m_StreamBinder = streamBinder; } |
|
25 }; |
|
26 |
|
27 STDMETHODIMP CSequentialInStreamForBinder::Read(void *data, UInt32 size, UInt32 *processedSize) |
|
28 { return m_StreamBinder->Read(data, size, processedSize); } |
|
29 |
|
30 class CSequentialOutStreamForBinder: |
|
31 public ISequentialOutStream, |
|
32 public CMyUnknownImp |
|
33 { |
|
34 public: |
|
35 MY_UNKNOWN_IMP |
|
36 |
|
37 STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize); |
|
38 |
|
39 private: |
|
40 CStreamBinder *m_StreamBinder; |
|
41 public: |
|
42 ~CSequentialOutStreamForBinder() { m_StreamBinder->CloseWrite(); } |
|
43 void SetBinder(CStreamBinder *streamBinder) { m_StreamBinder = streamBinder; } |
|
44 }; |
|
45 |
|
46 STDMETHODIMP CSequentialOutStreamForBinder::Write(const void *data, UInt32 size, UInt32 *processedSize) |
|
47 { return m_StreamBinder->Write(data, size, processedSize); } |
|
48 |
|
49 |
|
50 ////////////////////////// |
|
51 // CStreamBinder |
|
52 // (_thereAreBytesToReadEvent && _bufferSize == 0) means that stream is finished. |
|
53 |
|
54 HRes CStreamBinder::CreateEvents() |
|
55 { |
|
56 RINOK(_allBytesAreWritenEvent.Create(true)); |
|
57 RINOK(_thereAreBytesToReadEvent.Create()); |
|
58 return _readStreamIsClosedEvent.Create(); |
|
59 } |
|
60 |
|
61 void CStreamBinder::ReInit() |
|
62 { |
|
63 _thereAreBytesToReadEvent.Reset(); |
|
64 _readStreamIsClosedEvent.Reset(); |
|
65 ProcessedSize = 0; |
|
66 } |
|
67 |
|
68 |
|
69 |
|
70 void CStreamBinder::CreateStreams(ISequentialInStream **inStream, |
|
71 ISequentialOutStream **outStream) |
|
72 { |
|
73 CSequentialInStreamForBinder *inStreamSpec = new |
|
74 CSequentialInStreamForBinder; |
|
75 CMyComPtr<ISequentialInStream> inStreamLoc(inStreamSpec); |
|
76 inStreamSpec->SetBinder(this); |
|
77 *inStream = inStreamLoc.Detach(); |
|
78 |
|
79 CSequentialOutStreamForBinder *outStreamSpec = new |
|
80 CSequentialOutStreamForBinder; |
|
81 CMyComPtr<ISequentialOutStream> outStreamLoc(outStreamSpec); |
|
82 outStreamSpec->SetBinder(this); |
|
83 *outStream = outStreamLoc.Detach(); |
|
84 |
|
85 _buffer = NULL; |
|
86 _bufferSize= 0; |
|
87 ProcessedSize = 0; |
|
88 } |
|
89 |
|
90 HRESULT CStreamBinder::Read(void *data, UInt32 size, UInt32 *processedSize) |
|
91 { |
|
92 UInt32 sizeToRead = size; |
|
93 if (size > 0) |
|
94 { |
|
95 RINOK(_thereAreBytesToReadEvent.Lock()); |
|
96 sizeToRead = MyMin(_bufferSize, size); |
|
97 if (_bufferSize > 0) |
|
98 { |
|
99 MoveMemory(data, _buffer, sizeToRead); |
|
100 _buffer = ((const Byte *)_buffer) + sizeToRead; |
|
101 _bufferSize -= sizeToRead; |
|
102 if (_bufferSize == 0) |
|
103 { |
|
104 _thereAreBytesToReadEvent.Reset(); |
|
105 _allBytesAreWritenEvent.Set(); |
|
106 } |
|
107 } |
|
108 } |
|
109 if (processedSize != NULL) |
|
110 *processedSize = sizeToRead; |
|
111 ProcessedSize += sizeToRead; |
|
112 return S_OK; |
|
113 } |
|
114 |
|
115 void CStreamBinder::CloseRead() |
|
116 { |
|
117 _readStreamIsClosedEvent.Set(); |
|
118 } |
|
119 |
|
120 HRESULT CStreamBinder::Write(const void *data, UInt32 size, UInt32 *processedSize) |
|
121 { |
|
122 if (size > 0) |
|
123 { |
|
124 _buffer = data; |
|
125 _bufferSize = size; |
|
126 _allBytesAreWritenEvent.Reset(); |
|
127 _thereAreBytesToReadEvent.Set(); |
|
128 |
|
129 HANDLE events[2]; |
|
130 events[0] = _allBytesAreWritenEvent; |
|
131 events[1] = _readStreamIsClosedEvent; |
|
132 DWORD waitResult = ::WaitForMultipleObjects(2, events, FALSE, INFINITE); |
|
133 if (waitResult != WAIT_OBJECT_0 + 0) |
|
134 { |
|
135 // ReadingWasClosed = true; |
|
136 return S_FALSE; |
|
137 } |
|
138 // if(!_allBytesAreWritenEvent.Lock()) |
|
139 // return E_FAIL; |
|
140 } |
|
141 if (processedSize != NULL) |
|
142 *processedSize = size; |
|
143 return S_OK; |
|
144 } |
|
145 |
|
146 void CStreamBinder::CloseWrite() |
|
147 { |
|
148 // _bufferSize must be = 0 |
|
149 _thereAreBytesToReadEvent.Set(); |
|
150 } |
|