1 #ifndef _BABELTRACE_CTF_TYPES_H
2 #define _BABELTRACE_CTF_TYPES_H
9 * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
22 #include <babeltrace/types.h>
23 #include <sys/types.h>
33 off_t offset
; /* offset of the packet in the file, in bytes */
34 size_t packet_size
; /* packet size, in bits */
35 size_t content_size
; /* content size, in bits */
39 * Always update ctf_stream_pos with ctf_move_pos and ctf_init_pos.
41 struct ctf_stream_pos
{
42 struct stream_pos parent
;
43 int fd
; /* backing file fd. -1 if unset. */
44 GArray
*packet_index
; /* contains struct packet_index */
45 int prot
; /* mmap protection */
46 int flags
; /* mmap flags */
48 /* Current position */
49 off_t mmap_offset
; /* mmap offset in the file, in bytes */
50 size_t packet_size
; /* current packet size, in bits */
51 size_t content_size
; /* current content size, in bits */
52 uint32_t *content_size_loc
; /* pointer to current content size */
53 char *base
; /* mmap base address */
54 size_t offset
; /* offset from base, in bits */
55 size_t cur_index
; /* current index in packet index */
57 int dummy
; /* dummy position, for length calculation */
61 struct ctf_stream_pos
*ctf_pos(struct stream_pos
*pos
)
63 return container_of(pos
, struct ctf_stream_pos
, parent
);
66 void ctf_integer_read(struct stream_pos
*pos
, struct definition
*definition
);
67 void ctf_integer_write(struct stream_pos
*pos
, struct definition
*definition
);
68 void ctf_float_read(struct stream_pos
*pos
, struct definition
*definition
);
69 void ctf_float_write(struct stream_pos
*pos
, struct definition
*definition
);
70 void ctf_string_read(struct stream_pos
*pos
, struct definition
*definition
);
71 void ctf_string_write(struct stream_pos
*pos
, struct definition
*definition
);
72 void ctf_enum_read(struct stream_pos
*pos
, struct definition
*definition
);
73 void ctf_enum_write(struct stream_pos
*pos
, struct definition
*definition
);
74 void ctf_struct_rw(struct stream_pos
*pos
, struct definition
*definition
);
75 void ctf_variant_rw(struct stream_pos
*pos
, struct definition
*definition
);
76 void ctf_array_rw(struct stream_pos
*pos
, struct definition
*definition
);
77 void ctf_sequence_rw(struct stream_pos
*pos
, struct definition
*definition
);
79 void ctf_move_pos_slow(struct ctf_stream_pos
*pos
, size_t offset
);
81 void ctf_init_pos(struct ctf_stream_pos
*pos
, int fd
, int open_flags
);
82 void ctf_fini_pos(struct ctf_stream_pos
*pos
);
85 * move_pos - move position of a relative bit offset
87 * TODO: allow larger files by updating base too.
90 void ctf_move_pos(struct ctf_stream_pos
*pos
, size_t bit_offset
)
93 if (((pos
->prot
== PROT_READ
)
94 && (pos
->offset
+ bit_offset
>= pos
->content_size
))
95 || ((pos
->prot
== PROT_WRITE
)
96 && (pos
->offset
+ bit_offset
>= pos
->packet_size
))) {
97 ctf_move_pos_slow(pos
, bit_offset
);
101 pos
->offset
+= bit_offset
;
105 * align_pos - align position on a bit offset (> 0)
107 * TODO: allow larger files by updating base too.
110 void ctf_align_pos(struct ctf_stream_pos
*pos
, size_t bit_offset
)
112 ctf_move_pos(pos
, offset_align(pos
->offset
, bit_offset
));
116 char *ctf_get_pos_addr(struct ctf_stream_pos
*pos
)
118 /* Only makes sense to get the address after aligning on CHAR_BIT */
119 assert(!(pos
->offset
% CHAR_BIT
));
120 return pos
->base
+ (pos
->offset
/ CHAR_BIT
);
124 void ctf_dummy_pos(struct ctf_stream_pos
*pos
, struct ctf_stream_pos
*dummy
)
126 memcpy(dummy
, pos
, sizeof(struct ctf_stream_pos
));
132 * Check if current packet can hold data.
133 * Returns 0 for success, negative error otherwise.
136 int ctf_pos_packet(struct ctf_stream_pos
*dummy
)
138 if (dummy
->offset
> dummy
->packet_size
)
144 void ctf_pos_pad_packet(struct ctf_stream_pos
*pos
)
146 ctf_move_pos(pos
, pos
->packet_size
- pos
->offset
);
149 #endif /* _BABELTRACE_CTF_TYPES_H */
This page took 0.034762 seconds and 6 git commands to generate.