1 | #include "circular_buffer.hpp" |
---|
2 | |
---|
3 | #include "linear_buffer_impl.hpp" |
---|
4 | |
---|
5 | namespace xmlioserver |
---|
6 | { |
---|
7 | namespace comm |
---|
8 | { |
---|
9 | /// ////////////////////// Définitions ////////////////////// /// |
---|
10 | CCircularBuffer::CCircularBuffer(StdSize size) |
---|
11 | : SuperClass(size) |
---|
12 | , p_write(0), p_read(0), p_unused(0) |
---|
13 | , nbrequest(0) |
---|
14 | { /* Ne rien faire de plus */ } |
---|
15 | |
---|
16 | CCircularBuffer::CCircularBuffer(const CCircularBuffer & cbuffer) |
---|
17 | : SuperClass(cbuffer) |
---|
18 | , p_write(cbuffer.p_write), p_read(cbuffer.p_read), p_unused(cbuffer.p_unused) |
---|
19 | , nbrequest(cbuffer.nbrequest) |
---|
20 | { /* Ne rien faire de plus */ } |
---|
21 | |
---|
22 | CCircularBuffer::CCircularBuffer(const CCircularBuffer * const cbuffer) |
---|
23 | : SuperClass(cbuffer) |
---|
24 | , p_write(cbuffer->p_write), p_read(cbuffer->p_read), p_unused(cbuffer->p_unused) |
---|
25 | , nbrequest(cbuffer->nbrequest) |
---|
26 | { /* Ne rien faire de plus */ } |
---|
27 | |
---|
28 | CCircularBuffer::~CCircularBuffer(void) |
---|
29 | { /* Ne rien faire de plus */ } |
---|
30 | |
---|
31 | ///-------------------------------------------------------------- |
---|
32 | |
---|
33 | void CCircularBuffer::clear(void) |
---|
34 | { |
---|
35 | this-> p_write = 0; |
---|
36 | this-> p_read = 0; |
---|
37 | this-> p_unused = 0; |
---|
38 | } |
---|
39 | |
---|
40 | //------------------------------------------------------------- |
---|
41 | |
---|
42 | StdSize CCircularBuffer::getNextRequestSize(void) const |
---|
43 | { |
---|
44 | if (!this->hasRequest()) |
---|
45 | ERROR("CCircularBuffer::getNextRequestSize()", |
---|
46 | << " invalid call !"); |
---|
47 | long int nbargs = 0; |
---|
48 | StdSize startpos = this-> p_read; |
---|
49 | StdSize currsize = 2 * SuperClass::getRequestedSize(nbargs); |
---|
50 | nbargs = SuperClass::getInt(startpos + currsize); |
---|
51 | currsize += SuperClass::getRequestedSize(nbargs); |
---|
52 | |
---|
53 | for (long int i = 0; i < nbargs; i++) |
---|
54 | { |
---|
55 | CBufferData bufdata; |
---|
56 | SuperClass::getBufferData(bufdata, startpos + currsize); |
---|
57 | currsize += (bufdata.size + DATA_HEADER_SIZE); |
---|
58 | } |
---|
59 | return (currsize); |
---|
60 | } |
---|
61 | |
---|
62 | //------------------------------------------------------------- |
---|
63 | |
---|
64 | CLinearBuffer CCircularBuffer::getNextRequest(void) |
---|
65 | { |
---|
66 | StdSize startpos = this-> p_read; |
---|
67 | StdSize currsize = this->getNextRequestSize(); |
---|
68 | |
---|
69 | this->movePRead(currsize); |
---|
70 | this->nbrequest--; |
---|
71 | |
---|
72 | return (CLinearBuffer(SuperClass::getData(startpos), currsize)); |
---|
73 | } |
---|
74 | |
---|
75 | //------------------------------------------------------------- |
---|
76 | |
---|
77 | void CCircularBuffer::appendRequest(const CLinearBuffer & brequest) |
---|
78 | { |
---|
79 | StdSize usedsize = brequest.getUsedSize(); |
---|
80 | if (!this->isAvailable(usedsize)) |
---|
81 | ERROR("CCircularBuffer::appendRequest(brequest)", |
---|
82 | << " invalid call !"); |
---|
83 | StdSize data_begin = this->prepareNextDataPosition(usedsize); |
---|
84 | SuperClass::setData(brequest.getData(), usedsize, data_begin); |
---|
85 | this->updateNbRequests(data_begin, data_begin + usedsize); |
---|
86 | } |
---|
87 | |
---|
88 | //------------------------------------------------------------- |
---|
89 | |
---|
90 | char * CCircularBuffer::prepareNextData(StdSize data_size) |
---|
91 | { |
---|
92 | return (SuperClass::getData(this->prepareNextDataPosition(data_size))); |
---|
93 | } |
---|
94 | |
---|
95 | //------------------------------------------------------------- |
---|
96 | |
---|
97 | StdSize CCircularBuffer::prepareNextDataPosition(StdSize data_size) |
---|
98 | { |
---|
99 | StdSize startpos = this-> p_write; |
---|
100 | if (!this->isAvailable(data_size)) |
---|
101 | ERROR("CCircularBuffer::prepareNextDataPosition(data_size)", |
---|
102 | << " invalid call !"); |
---|
103 | if ((this-> p_write + data_size) > SuperClass::getSize()) |
---|
104 | startpos = 0; |
---|
105 | |
---|
106 | this->movePWrite(data_size); |
---|
107 | return (startpos); |
---|
108 | } |
---|
109 | |
---|
110 | //------------------------------------------------------------- |
---|
111 | |
---|
112 | void CCircularBuffer::movePRead(StdSize data_size) |
---|
113 | { |
---|
114 | this-> p_read += data_size; |
---|
115 | if ((this-> p_read == this-> p_unused) && |
---|
116 | (this-> p_read == this-> p_write)) |
---|
117 | { |
---|
118 | this->clear(); |
---|
119 | return; |
---|
120 | } |
---|
121 | |
---|
122 | if (this-> p_read == this-> p_unused) |
---|
123 | { |
---|
124 | this-> p_unused = this-> p_write; |
---|
125 | this-> p_read = 0; |
---|
126 | return; |
---|
127 | } |
---|
128 | if (this-> p_read == this-> p_write) |
---|
129 | { |
---|
130 | this->clear(); |
---|
131 | } |
---|
132 | } |
---|
133 | |
---|
134 | //------------------------------------------------------------- |
---|
135 | |
---|
136 | void CCircularBuffer::movePWrite(StdSize data_size) |
---|
137 | { |
---|
138 | if ((this-> p_write + data_size) > SuperClass::getSize()) |
---|
139 | { |
---|
140 | this-> p_unused = this-> p_write; |
---|
141 | this-> p_write = data_size; |
---|
142 | if (this-> p_read < (data_size)) |
---|
143 | ERROR("CCircularBuffer::movePWrite(data_size)", |
---|
144 | << " invalid position 1 !"); |
---|
145 | } |
---|
146 | else |
---|
147 | { |
---|
148 | if ((this-> p_read > this-> p_write) && |
---|
149 | (this-> p_read < (this-> p_write + data_size))) |
---|
150 | ERROR("CCircularBuffer::movePWrite(data_size)", |
---|
151 | << " invalid position 2 !"); |
---|
152 | this-> p_write += data_size; |
---|
153 | if (this->p_read < this->p_write) |
---|
154 | this-> p_unused = this-> p_write; |
---|
155 | } |
---|
156 | } |
---|
157 | |
---|
158 | //------------------------------------------------------------- |
---|
159 | |
---|
160 | bool CCircularBuffer::hasRequest(void) const |
---|
161 | { |
---|
162 | return (this->nbrequest != 0); |
---|
163 | } |
---|
164 | |
---|
165 | //------------------------------------------------------------- |
---|
166 | |
---|
167 | bool CCircularBuffer::isAvailable(StdSize data_size) const |
---|
168 | { |
---|
169 | if (this->p_write == this->p_unused) |
---|
170 | return (((SuperClass::getSize() - this->p_write) >= data_size) || |
---|
171 | (this->p_read >= data_size)); |
---|
172 | else |
---|
173 | return ((this->p_read - this->p_write) >= data_size); |
---|
174 | } |
---|
175 | //--------------------------------------------------------------- |
---|
176 | |
---|
177 | void CCircularBuffer::printToTextFile (const StdString & filename) |
---|
178 | { |
---|
179 | StdOFStream ofs(filename.c_str()); |
---|
180 | this->printToTextStream(ofs); |
---|
181 | ofs.close(); |
---|
182 | } |
---|
183 | |
---|
184 | //------------------------------------------------------------- |
---|
185 | |
---|
186 | void CCircularBuffer::printToTextStream (StdOStream & ostr) |
---|
187 | { |
---|
188 | StdSize _p_write = p_write, |
---|
189 | _p_read = p_read, |
---|
190 | _p_unused = p_unused, |
---|
191 | _nbrequest = nbrequest; |
---|
192 | |
---|
193 | while (this->hasRequest()) |
---|
194 | { |
---|
195 | this->getNextRequest().printToTextStream(ostr); |
---|
196 | ostr << std::endl; |
---|
197 | } |
---|
198 | |
---|
199 | p_write = _p_write; |
---|
200 | p_read = _p_read; |
---|
201 | p_unused = _p_unused; |
---|
202 | nbrequest = _nbrequest; |
---|
203 | } |
---|
204 | |
---|
205 | //--------------------------------------------------------------- |
---|
206 | |
---|
207 | StdSize CCircularBuffer::getNumberOfRequest(void) const |
---|
208 | { |
---|
209 | return (this->nbrequest); |
---|
210 | } |
---|
211 | |
---|
212 | //--------------------------------------------------------------- |
---|
213 | |
---|
214 | StdSize CCircularBuffer::getReadPosition(void) const |
---|
215 | { |
---|
216 | return (this->p_read); |
---|
217 | } |
---|
218 | |
---|
219 | //--------------------------------------------------------------- |
---|
220 | |
---|
221 | StdSize CCircularBuffer::getWritePosition(void) const |
---|
222 | { |
---|
223 | return (this->p_write); |
---|
224 | } |
---|
225 | |
---|
226 | //--------------------------------------------------------------- |
---|
227 | |
---|
228 | StdSize CCircularBuffer::getUnusedPosition(void) const |
---|
229 | { |
---|
230 | return (this->p_unused); |
---|
231 | } |
---|
232 | |
---|
233 | //--------------------------------------------------------------- |
---|
234 | |
---|
235 | void CCircularBuffer::updateNbRequests(StdSize data_begin, StdSize data_end) |
---|
236 | { |
---|
237 | StdSize position = data_begin; |
---|
238 | while (position != data_end) |
---|
239 | { |
---|
240 | this->nbrequest++; |
---|
241 | position = SuperClass::getNextDataPosition(position); // manager id |
---|
242 | position = SuperClass::getNextDataPosition(position); // method id |
---|
243 | SuperClass::updateBufferData(position); |
---|
244 | long int nbarg = SuperClass::getInt(position); |
---|
245 | position = SuperClass::getNextDataPosition(position); |
---|
246 | for (long int i = 0; i < nbarg; i++) |
---|
247 | position = SuperClass::getNextDataPosition(position); |
---|
248 | |
---|
249 | if (position > data_end) |
---|
250 | ERROR("CCircularBuffer::updateNbRequests(StdSize data_begin, StdSize data_end)", |
---|
251 | << "[ position courante" << position |
---|
252 | << ", fin de traitement" << data_end << " ] " |
---|
253 | << "Impossible de mettre à jour la liste des requêtes !"); |
---|
254 | } |
---|
255 | } |
---|
256 | |
---|
257 | ///------------------------------------------------------------ |
---|
258 | } // namespace tree |
---|
259 | } // namespace xmlioserver |
---|
260 | |
---|