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.
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 #include <babeltrace/types.h>
31 #include <babeltrace/babeltrace-internal.h>
32 #include <sys/types.h>
41 #include <babeltrace/mmap-align.h>
43 #define LAST_OFFSET_POISON ((int64_t) ~0ULL)
45 struct bt_stream_callbacks
;
48 off_t offset
; /* offset of the packet in the file, in bytes */
49 int64_t data_offset
; /* offset of data within the packet, in bits */
50 uint64_t packet_size
; /* packet size, in bits */
51 uint64_t content_size
; /* content size, in bits */
52 uint64_t timestamp_begin
;
53 uint64_t timestamp_end
;
54 uint64_t events_discarded
;
55 uint64_t events_discarded_len
; /* length of the field, in bits */
59 * Always update ctf_stream_pos with ctf_move_pos and ctf_init_pos.
61 struct ctf_stream_pos
{
62 struct stream_pos parent
;
63 int fd
; /* backing file fd. -1 if unset. */
64 GArray
*packet_cycles_index
; /* contains struct packet_index in cycles */
65 GArray
*packet_real_index
; /* contains struct packet_index in ns */
66 int prot
; /* mmap protection */
67 int flags
; /* mmap flags */
69 /* Current position */
70 off_t mmap_offset
; /* mmap offset in the file, in bytes */
71 off_t mmap_base_offset
; /* offset of start of packet in mmap, in bytes */
72 uint64_t packet_size
; /* current packet size, in bits */
73 uint64_t content_size
; /* current content size, in bits */
74 uint64_t *content_size_loc
; /* pointer to current content size */
75 struct mmap_align
*base_mma
;/* mmap base address */
76 int64_t offset
; /* offset from base, in bits. EOF for end of file. */
77 int64_t last_offset
; /* offset before the last read_event */
78 uint64_t cur_index
; /* current index in packet index */
79 uint64_t last_events_discarded
; /* last known amount of event discarded */
80 void (*packet_seek
)(struct stream_pos
*pos
, size_t index
,
81 int whence
); /* function called to switch packet */
83 int dummy
; /* dummy position, for length calculation */
84 struct bt_stream_callbacks
*cb
; /* Callbacks registered for iterator. */
88 struct ctf_stream_pos
*ctf_pos(struct stream_pos
*pos
)
90 return container_of(pos
, struct ctf_stream_pos
, parent
);
93 int ctf_integer_read(struct stream_pos
*pos
, struct definition
*definition
);
94 int ctf_integer_write(struct stream_pos
*pos
, struct definition
*definition
);
95 int ctf_float_read(struct stream_pos
*pos
, struct definition
*definition
);
96 int ctf_float_write(struct stream_pos
*pos
, struct definition
*definition
);
97 int ctf_string_read(struct stream_pos
*pos
, struct definition
*definition
);
98 int ctf_string_write(struct stream_pos
*pos
, struct definition
*definition
);
99 int ctf_enum_read(struct stream_pos
*pos
, struct definition
*definition
);
100 int ctf_enum_write(struct stream_pos
*pos
, struct definition
*definition
);
101 int ctf_struct_rw(struct stream_pos
*pos
, struct definition
*definition
);
102 int ctf_variant_rw(struct stream_pos
*pos
, struct definition
*definition
);
103 int ctf_array_read(struct stream_pos
*pos
, struct definition
*definition
);
104 int ctf_array_write(struct stream_pos
*pos
, struct definition
*definition
);
105 int ctf_sequence_read(struct stream_pos
*pos
, struct definition
*definition
);
106 int ctf_sequence_write(struct stream_pos
*pos
, struct definition
*definition
);
108 void ctf_packet_seek(struct stream_pos
*pos
, size_t index
, int whence
);
110 int ctf_init_pos(struct ctf_stream_pos
*pos
, int fd
, int open_flags
);
111 int ctf_fini_pos(struct ctf_stream_pos
*pos
);
114 * move_pos - move position of a relative bit offset
116 * TODO: allow larger files by updating base too.
119 void ctf_move_pos(struct ctf_stream_pos
*pos
, uint64_t bit_offset
)
121 printf_debug("ctf_move_pos test EOF: %" PRId64
"\n", pos
->offset
);
122 if (unlikely(pos
->offset
== EOF
))
127 * PROT_READ ctf_packet_seek is called from within
128 * ctf_pos_get_event so end of packet does not change
129 * the packet context on for the last event of the
132 if ((pos
->prot
== PROT_WRITE
)
133 && (unlikely(pos
->offset
+ bit_offset
>= pos
->packet_size
))) {
134 printf_debug("ctf_packet_seek (before call): %" PRId64
"\n",
136 ctf_packet_seek(&pos
->parent
, 0, SEEK_CUR
);
137 printf_debug("ctf_packet_seek (after call): %" PRId64
"\n",
142 pos
->offset
+= bit_offset
;
143 printf_debug("ctf_move_pos after increment: %" PRId64
"\n", pos
->offset
);
147 * align_pos - align position on a bit offset (> 0)
149 * TODO: allow larger files by updating base too.
152 void ctf_align_pos(struct ctf_stream_pos
*pos
, uint64_t bit_offset
)
154 ctf_move_pos(pos
, offset_align(pos
->offset
, bit_offset
));
158 char *ctf_get_pos_addr(struct ctf_stream_pos
*pos
)
160 /* Only makes sense to get the address after aligning on CHAR_BIT */
161 assert(!(pos
->offset
% CHAR_BIT
));
162 return mmap_align_addr(pos
->base_mma
) +
163 pos
->mmap_base_offset
+ (pos
->offset
/ CHAR_BIT
);
167 void ctf_dummy_pos(struct ctf_stream_pos
*pos
, struct ctf_stream_pos
*dummy
)
169 memcpy(dummy
, pos
, sizeof(struct ctf_stream_pos
));
175 * Check if current packet can hold data.
176 * Returns 0 for success, negative error otherwise.
179 int ctf_pos_packet(struct ctf_stream_pos
*dummy
)
181 if (unlikely(dummy
->offset
> dummy
->packet_size
))
187 void ctf_pos_pad_packet(struct ctf_stream_pos
*pos
)
189 ctf_move_pos(pos
, pos
->packet_size
- pos
->offset
);
193 int ctf_pos_access_ok(struct ctf_stream_pos
*pos
, uint64_t bit_len
)
195 if (unlikely(pos
->offset
== EOF
))
197 if (unlikely(pos
->offset
+ bit_len
> pos
->packet_size
))
203 * Update the stream position for to the current event. This moves to
204 * the next packet if we are located at the end of the current packet.
207 void ctf_pos_get_event(struct ctf_stream_pos
*pos
)
209 assert(pos
->offset
<= pos
->content_size
);
210 if (pos
->offset
== pos
->content_size
) {
211 printf_debug("ctf_packet_seek (before call): %" PRId64
"\n",
213 pos
->packet_seek(&pos
->parent
, 0, SEEK_CUR
);
214 printf_debug("ctf_packet_seek (after call): %" PRId64
"\n",
219 void ctf_print_timestamp(FILE *fp
, struct ctf_stream_definition
*stream
,
222 #endif /* _BABELTRACE_CTF_TYPES_H */
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