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d79865b9 MD |
1 | #ifndef _BABELTRACE_CTF_TYPES_H |
2 | #define _BABELTRACE_CTF_TYPES_H | |
6dc2ca62 MD |
3 | |
4 | /* | |
5 | * Common Trace Format | |
6 | * | |
7 | * Type header | |
8 | * | |
ccd7e1c8 | 9 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
6dc2ca62 | 10 | * |
ccd7e1c8 MD |
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: | |
de0ba614 | 17 | * |
ccd7e1c8 MD |
18 | * The above copyright notice and this permission notice shall be included in |
19 | * all copies or substantial portions of the Software. | |
6dc2ca62 MD |
20 | */ |
21 | ||
4c8bfb7e | 22 | #include <babeltrace/types.h> |
70bd0a12 | 23 | #include <babeltrace/babeltrace-internal.h> |
8563e754 MD |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
8c572eba MD |
27 | #include <sys/mman.h> |
28 | #include <errno.h> | |
6dc2ca62 | 29 | #include <stdint.h> |
0f980a35 | 30 | #include <unistd.h> |
6dc2ca62 | 31 | #include <glib.h> |
c5e74408 | 32 | #include <stdio.h> |
847bf71a | 33 | |
c34ccddd MD |
34 | struct bt_stream_callbacks; |
35 | ||
0f980a35 MD |
36 | struct packet_index { |
37 | off_t offset; /* offset of the packet in the file, in bytes */ | |
2b9a764d | 38 | off_t data_offset; /* offset of data within the packet, in bits */ |
0f980a35 MD |
39 | size_t packet_size; /* packet size, in bits */ |
40 | size_t content_size; /* content size, in bits */ | |
75cc2c35 MD |
41 | uint64_t timestamp_begin; |
42 | uint64_t timestamp_end; | |
dd2544fd MD |
43 | }; |
44 | ||
dd2544fd | 45 | /* |
46322b33 | 46 | * Always update ctf_stream_pos with ctf_move_pos and ctf_init_pos. |
dd2544fd | 47 | */ |
46322b33 MD |
48 | struct ctf_stream_pos { |
49 | struct stream_pos parent; | |
0f980a35 MD |
50 | int fd; /* backing file fd. -1 if unset. */ |
51 | GArray *packet_index; /* contains struct packet_index */ | |
8c572eba MD |
52 | int prot; /* mmap protection */ |
53 | int flags; /* mmap flags */ | |
dd2544fd | 54 | |
0f980a35 MD |
55 | /* Current position */ |
56 | off_t mmap_offset; /* mmap offset in the file, in bytes */ | |
57 | size_t packet_size; /* current packet size, in bits */ | |
58 | size_t content_size; /* current content size, in bits */ | |
8c572eba | 59 | uint32_t *content_size_loc; /* pointer to current content size */ |
0f980a35 | 60 | char *base; /* mmap base address */ |
670977d3 | 61 | ssize_t offset; /* offset from base, in bits. EOF for end of file. */ |
8c572eba | 62 | size_t cur_index; /* current index in packet index */ |
b086c01a JD |
63 | void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset, |
64 | int whence); /* function called to switch packet */ | |
dd2544fd | 65 | |
0f980a35 | 66 | int dummy; /* dummy position, for length calculation */ |
c34ccddd | 67 | struct bt_stream_callbacks *cb; /* Callbacks registered for iterator. */ |
0f980a35 | 68 | }; |
dd2544fd | 69 | |
46322b33 MD |
70 | static inline |
71 | struct ctf_stream_pos *ctf_pos(struct stream_pos *pos) | |
72 | { | |
73 | return container_of(pos, struct ctf_stream_pos, parent); | |
74 | } | |
75 | ||
c5e74408 MD |
76 | int ctf_integer_read(struct stream_pos *pos, struct definition *definition); |
77 | int ctf_integer_write(struct stream_pos *pos, struct definition *definition); | |
78 | int ctf_float_read(struct stream_pos *pos, struct definition *definition); | |
79 | int ctf_float_write(struct stream_pos *pos, struct definition *definition); | |
80 | int ctf_string_read(struct stream_pos *pos, struct definition *definition); | |
81 | int ctf_string_write(struct stream_pos *pos, struct definition *definition); | |
82 | int ctf_enum_read(struct stream_pos *pos, struct definition *definition); | |
83 | int ctf_enum_write(struct stream_pos *pos, struct definition *definition); | |
84 | int ctf_struct_rw(struct stream_pos *pos, struct definition *definition); | |
85 | int ctf_variant_rw(struct stream_pos *pos, struct definition *definition); | |
81dee1bb MD |
86 | int ctf_array_read(struct stream_pos *pos, struct definition *definition); |
87 | int ctf_array_write(struct stream_pos *pos, struct definition *definition); | |
88 | int ctf_sequence_read(struct stream_pos *pos, struct definition *definition); | |
89 | int ctf_sequence_write(struct stream_pos *pos, struct definition *definition); | |
6dc2ca62 | 90 | |
847bf71a | 91 | void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset, int whence); |
0f980a35 | 92 | |
8563e754 | 93 | void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags); |
46322b33 | 94 | void ctf_fini_pos(struct ctf_stream_pos *pos); |
0f980a35 MD |
95 | |
96 | /* | |
97 | * move_pos - move position of a relative bit offset | |
98 | * | |
99 | * TODO: allow larger files by updating base too. | |
100 | */ | |
101 | static inline | |
46322b33 | 102 | void ctf_move_pos(struct ctf_stream_pos *pos, size_t bit_offset) |
0f980a35 | 103 | { |
670977d3 | 104 | printf_debug("ctf_move_pos test EOF: %zd\n", pos->offset); |
90bf3cef | 105 | if (unlikely(pos->offset == EOF)) |
c5e74408 MD |
106 | return; |
107 | ||
8c572eba | 108 | if (pos->fd >= 0) { |
5f643ed7 MD |
109 | /* |
110 | * PROT_READ ctf_move_pos_slow is called from within | |
111 | * ctf_pos_get_event so end of packet does not change | |
112 | * the packet context on for the last event of the | |
113 | * packet. | |
114 | */ | |
115 | if ((pos->prot == PROT_WRITE) | |
90bf3cef | 116 | && (unlikely(pos->offset + bit_offset >= pos->packet_size))) { |
670977d3 MD |
117 | printf_debug("ctf_move_pos_slow (before call): %zd\n", |
118 | pos->offset); | |
847bf71a | 119 | ctf_move_pos_slow(pos, bit_offset, SEEK_CUR); |
670977d3 MD |
120 | printf_debug("ctf_move_pos_slow (after call): %zd\n", |
121 | pos->offset); | |
8c572eba MD |
122 | return; |
123 | } | |
124 | } | |
125 | pos->offset += bit_offset; | |
670977d3 | 126 | printf_debug("ctf_move_pos after increment: %zd\n", pos->offset); |
0f980a35 MD |
127 | } |
128 | ||
129 | /* | |
130 | * align_pos - align position on a bit offset (> 0) | |
131 | * | |
132 | * TODO: allow larger files by updating base too. | |
133 | */ | |
134 | static inline | |
46322b33 | 135 | void ctf_align_pos(struct ctf_stream_pos *pos, size_t bit_offset) |
0f980a35 | 136 | { |
46322b33 | 137 | ctf_move_pos(pos, offset_align(pos->offset, bit_offset)); |
0f980a35 MD |
138 | } |
139 | ||
140 | static inline | |
46322b33 | 141 | char *ctf_get_pos_addr(struct ctf_stream_pos *pos) |
0f980a35 MD |
142 | { |
143 | /* Only makes sense to get the address after aligning on CHAR_BIT */ | |
144 | assert(!(pos->offset % CHAR_BIT)); | |
145 | return pos->base + (pos->offset / CHAR_BIT); | |
146 | } | |
147 | ||
8c572eba | 148 | static inline |
46322b33 | 149 | void ctf_dummy_pos(struct ctf_stream_pos *pos, struct ctf_stream_pos *dummy) |
8c572eba | 150 | { |
46322b33 | 151 | memcpy(dummy, pos, sizeof(struct ctf_stream_pos)); |
8c572eba MD |
152 | dummy->dummy = 1; |
153 | dummy->fd = -1; | |
154 | } | |
155 | ||
156 | /* | |
157 | * Check if current packet can hold data. | |
158 | * Returns 0 for success, negative error otherwise. | |
159 | */ | |
160 | static inline | |
46322b33 | 161 | int ctf_pos_packet(struct ctf_stream_pos *dummy) |
8c572eba | 162 | { |
90bf3cef | 163 | if (unlikely(dummy->offset > dummy->packet_size)) |
8c572eba MD |
164 | return -ENOSPC; |
165 | return 0; | |
166 | } | |
167 | ||
168 | static inline | |
46322b33 | 169 | void ctf_pos_pad_packet(struct ctf_stream_pos *pos) |
8c572eba | 170 | { |
46322b33 | 171 | ctf_move_pos(pos, pos->packet_size - pos->offset); |
8c572eba MD |
172 | } |
173 | ||
c5e74408 MD |
174 | static inline |
175 | int ctf_pos_access_ok(struct ctf_stream_pos *pos, size_t bit_len) | |
176 | { | |
90bf3cef | 177 | if (unlikely(pos->offset == EOF)) |
c5e74408 | 178 | return 0; |
90bf3cef | 179 | if (unlikely(pos->offset + bit_len > pos->packet_size)) |
c5e74408 MD |
180 | return 0; |
181 | return 1; | |
182 | } | |
183 | ||
5f643ed7 MD |
184 | /* |
185 | * Update the stream position for to the current event. This moves to | |
186 | * the next packet if we are located at the end of the current packet. | |
187 | */ | |
188 | static inline | |
189 | void ctf_pos_get_event(struct ctf_stream_pos *pos) | |
190 | { | |
191 | assert(pos->offset <= pos->content_size); | |
192 | if (pos->offset == pos->content_size) { | |
193 | printf_debug("ctf_move_pos_slow (before call): %zd\n", | |
194 | pos->offset); | |
195 | ctf_move_pos_slow(pos, 0, SEEK_CUR); | |
196 | printf_debug("ctf_move_pos_slow (after call): %zd\n", | |
197 | pos->offset); | |
198 | } | |
199 | } | |
200 | ||
d79865b9 | 201 | #endif /* _BABELTRACE_CTF_TYPES_H */ |