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62bb3cd4 | 1 | //-*- Mode: C++ -*- |
2 | // @(#) $Id$ | |
3 | ||
4 | #ifndef ALIHLTOUT_H | |
5 | #define ALIHLTOUT_H | |
6 | /* This file is property of and copyright by the ALICE HLT Project * | |
7 | * ALICE Experiment at CERN, All rights reserved. * | |
8 | * See cxx source for full Copyright notice */ | |
9 | ||
10 | /** @file AliHLTOUT.h | |
11 | @author Matthias Richter | |
12 | @date | |
13 | @brief The control class for HLTOUT data. | |
14 | ||
15 | // see below for class documentation | |
16 | // or | |
17 | // refer to README to build package | |
18 | // or | |
19 | // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt | |
4de7334f | 20 | |
62bb3cd4 | 21 | */ |
4de7334f | 22 | #include <vector> |
62bb3cd4 | 23 | #include "AliHLTLogging.h" |
24 | ||
25 | /** | |
26 | * @class AliHLTOUT | |
27 | * The control class for HLTOUT data. | |
28 | * The output of the HLT, either from the HLTOUT nodes or simulated output, | |
29 | * is transferred and stored in the HOMER format. The AliHLTOUT class | |
30 | * implements scanning of the HOMER data for all HLTOUT DDL links and | |
31 | * abstracts access to the complete HLTOUT data. | |
32 | * | |
33 | */ | |
34 | class AliHLTOUT : public AliHLTLogging { | |
35 | public: | |
36 | /** standard constructor */ | |
37 | AliHLTOUT(); | |
38 | /** standard destructor */ | |
39 | virtual ~AliHLTOUT(); | |
40 | ||
4de7334f | 41 | /** |
42 | * Get number of data blocks in the HLTOUT data | |
43 | */ | |
44 | int GetNofDataBlocks(); | |
45 | ||
46 | /** | |
47 | * Select the first data block of a certain data type and specification. | |
48 | * The selection criteria can be of kAliHLTAnyDataType and/or | |
49 | * kAliHLTVoidDataSpec in order to be ignored and just match any data block. | |
50 | * @param dt [in] data type to match <br> | |
51 | * @param spec [in] data specification to match <br> | |
52 | * @return identifier >=0 if success, neg. error code if failed <br> | |
53 | * -ENOENT if no block found <br> | |
54 | * -EPERM if access denied (object locked) | |
55 | */ | |
56 | int SelectFirstDataBlock(AliHLTComponentDataType dt, AliHLTUInt32_t spec); | |
57 | ||
58 | /** | |
59 | * Select the next data block of data type and specification of the previous | |
60 | * call to @ref SelectFirstDataBlock. | |
61 | * @return identifier >=0 if success, neg. error code if failed <br> | |
62 | * -ENOENT if no block found <br> | |
63 | * -EPERM if access denied (object locked) | |
64 | */ | |
65 | int SelectNextDataBlock(); | |
66 | ||
67 | /** | |
68 | * Get properties of the selected data block. | |
69 | * @param dt [out] data type of the selected block | |
70 | * @param spec [out] data specification of the selected block | |
71 | */ | |
72 | int GetDataBlockDescription(AliHLTComponentDataType& dt, AliHLTUInt32_t& spec); | |
73 | ||
74 | /** | |
75 | * Get buffer of the selected data block. | |
76 | * @param pBuffer [out] buffer of the selected data block | |
77 | * @param size [out] size of the selected data block | |
78 | */ | |
79 | int GetDataBuffer(const AliHLTUInt8_t* &pBuffer, AliHLTUInt32_t& size); | |
80 | ||
81 | /** | |
82 | * Release buffer after use. | |
83 | * @param pBuffer [in] buffer of the selected data block | |
84 | */ | |
85 | int ReleaseDataBuffer(const AliHLTUInt8_t* pBuffer); | |
86 | ||
87 | /** | |
88 | * Locking guard for the AliHLTOUT object. | |
89 | * If the object is locked, the selection of data blocks can not be changed. | |
90 | */ | |
91 | class AliHLTOUTLockGuard { | |
92 | public: | |
93 | /** constructor */ | |
94 | AliHLTOUTLockGuard(AliHLTOUT* pInstance) : fpInstance(pInstance) | |
95 | {if (fpInstance) fpInstance->fbLocked=1;} | |
96 | /** destructor */ | |
97 | ~AliHLTOUTLockGuard() | |
98 | {if (fpInstance) fpInstance->fbLocked=0;} | |
99 | ||
100 | private: | |
101 | /** standard constructor prohibited */ | |
102 | AliHLTOUTLockGuard(); | |
103 | /** copy constructor prohibited */ | |
104 | AliHLTOUTLockGuard(const AliHLTOUTLockGuard&); | |
105 | /** assignment operator prohibited */ | |
106 | AliHLTOUTLockGuard& operator=(const AliHLTOUTLockGuard&); | |
107 | ||
108 | /** the AliHLTOUT instance the guard is locking */ | |
109 | AliHLTOUT* fpInstance; //!transient | |
110 | }; | |
111 | ||
112 | /** | |
113 | * Block descriptor. | |
114 | */ | |
115 | class AliHLTOUTBlockDescriptor { | |
116 | public: | |
117 | AliHLTOUTBlockDescriptor(AliHLTComponentDataType dt, AliHLTUInt32_t spec, AliHLTUInt32_t index) | |
118 | : fDataType(dt), fSpecification(spec), fIndex(index) {}; | |
119 | ~AliHLTOUTBlockDescriptor() {} | |
120 | ||
121 | operator AliHLTComponentDataType() const {return fDataType;} | |
122 | operator AliHLTUInt32_t() const {return fSpecification;} | |
123 | int operator==(AliHLTComponentDataType dt) const {return dt==fDataType;} | |
124 | int operator==(AliHLTUInt32_t spec) const {return spec==fSpecification;} | |
125 | ||
126 | AliHLTUInt32_t GetIndex() const {return fIndex;} | |
127 | private: | |
128 | /** data type of the block */ | |
129 | AliHLTComponentDataType fDataType; //!transient | |
130 | /** data specification of the block */ | |
131 | AliHLTUInt32_t fSpecification; //!transient | |
132 | /** index in the data stream */ | |
133 | AliHLTUInt32_t fIndex; //!transient | |
134 | }; | |
135 | ||
62bb3cd4 | 136 | protected: |
4de7334f | 137 | /** |
138 | * Add a block descriptor. | |
139 | * This is done by the child classes generating the index. The AliHLTOUT | |
140 | * object must be locked for index generation. | |
141 | * @param desc the block descriptor | |
142 | * @return 0 if success, -EPERM if access denied | |
143 | */ | |
144 | int AddBlockDescriptor(const AliHLTOUTBlockDescriptor desc); | |
62bb3cd4 | 145 | |
146 | private: | |
147 | /** copy constructor prohibited */ | |
148 | AliHLTOUT(const AliHLTOUT&); | |
149 | /** assignment operator prohibited */ | |
150 | AliHLTOUT& operator=(const AliHLTOUT&); | |
151 | ||
4de7334f | 152 | /** |
153 | * Generate the index of the HLTOUT data. | |
154 | * Must be implemented by the child classes. | |
155 | */ | |
156 | virtual int GenerateIndex()=0; | |
157 | ||
158 | /** | |
159 | * Get the data buffer | |
160 | * @param index [in] index of the block | |
161 | * @param pBuffer [out] buffer of the selected data block | |
162 | * @param size [out] size of the selected data block | |
163 | */ | |
164 | virtual int GetDataBuffer(AliHLTUInt32_t index, const AliHLTUInt8_t* &pBuffer, | |
165 | AliHLTUInt32_t& size)=0; | |
166 | ||
167 | /** data type for the current block search, set from @ref SelectFirstDataBlock */ | |
168 | AliHLTComponentDataType fSearchDataType; //!transient | |
169 | ||
170 | /** data specification for the current block search */ | |
171 | AliHLTUInt32_t fSearchSpecification; //!transient | |
172 | ||
173 | /** instance locked or not */ | |
174 | int fbLocked; //!transient | |
175 | ||
176 | /** list of block descriptors */ | |
177 | vector<AliHLTOUTBlockDescriptor> fBlockDescList; //!transient | |
178 | ||
179 | /** current position in the list */ | |
180 | vector<AliHLTOUTBlockDescriptor>::iterator fCurrent; //!transient | |
181 | ||
182 | /** data buffer under processing */ | |
183 | const AliHLTUInt8_t* fpBuffer; //!transient | |
184 | ||
62bb3cd4 | 185 | ClassDef(AliHLTOUT, 0) |
186 | }; | |
187 | #endif |