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Fixed the number of available container blocks
[frescor/frsh.git] / fres / contract / fres_container_internal.h
1 /**************************************************************************/
2 /* ---------------------------------------------------------------------- */
3 /* Copyright (C) 2006 - 2008 FRESCOR consortium partners:                 */
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39 /* instantiating FRSH generics or templates, or linking other files       */
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44 /* covered by the GNU Public License.                                     */
45 /**************************************************************************/
46
47 /**
48  * @file   fres_container_internal.h
49  * @author Michal Sojka <sojkam1@fel.cvut.cz>
50  * 
51  * @brief  Internal interface to fres_container.
52  *
53  * This header should only be included by files in frsh/fres library.
54  * 
55  */
56 #ifndef FRES_CONTAINER_INTERNAL_H
57 #define FRES_CONTAINER_INTERNAL_H
58
59 #include <fres_contract_idl.h>
60
61 /** State of the block in container. */
62 enum fres_block_state {
63         /** There is no such block in the container. */
64         FRES_BLOCK_EMPTY,
65         /** The container contains the block in the deserialized
66          * form. */
67         FRES_BLOCK_DATA,
68         /** The container contains the block in the serialized form
69          * (sequence of octets).*/
70         FRES_BLOCK_STREAM
71 };
72
73 #define FRES_BLOCK_FLAG_ENDIAN_m 0x0001
74 #define FRES_BLOCK_LITTLE_ENDIAN 0x0001
75
76 /** Unserialized (unknown) contracts blocks */
77 typedef struct fres_block_stream {
78         void *data; /**< Serialized data */
79         CORBA_unsigned_short flags; /**< Flags: bit 1 - little endian */
80         size_t length;              /**< Length of the stream */
81 } fres_block_stream_t;
82
83 /**
84  * Contract block.
85  * 
86  */
87 struct fres_block {
88         enum fres_block_state state; /**< State of the block */
89         union {
90                 /** Pointer to data according to param_type
91                  * (state == FRES_BLOCK_DATA) */
92                 void *data;
93                 
94                 /** Unserialized (unknown) data
95                  * (state == FRES_BLOCK_STREAM) */
96                 fres_block_stream_t stream;
97         } u;
98 };
99
100 /**
101  * Container for contract blocks.
102  *
103  * This is currently implemented as fixed size array of ::fres_block
104  * structures, which means that the container cannot contain multiple
105  * blocks of the same type.
106  */
107 struct fres_container {
108         struct fres_block blocks[__FRES_NUM_BLOCKS];
109 };
110
111 /** Checks wheder the @a type is valid number of the block */
112 #define FRES_BLOCK_TYPE_VALID(type)     \
113         ((type) < __FRES_NUM_BLOCKS &&  \
114          (type) >= 0)
115
116 int
117 fres_block_duplicate(struct fres_block *dest,
118                      const struct fres_block *source,
119                      enum fres_block_type type);
120
121 #endif