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34ac0e6c MD |
1 | #ifndef _BABELTRACE_H |
2 | #define _BABELTRACE_H | |
3 | ||
70bd0a12 JD |
4 | /* |
5 | * BabelTrace API | |
6 | * | |
7 | * Copyright 2010-2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
10 | * of this software and associated documentation files (the "Software"), to deal | |
11 | * in the Software without restriction, including without limitation the rights | |
12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
13 | * copies of the Software, and to permit persons to whom the Software is | |
14 | * furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | */ | |
847bf71a | 19 | |
c34ccddd | 20 | #include <glib.h> |
0ec662bd | 21 | #include <babeltrace/format.h> |
c34ccddd MD |
22 | |
23 | typedef GQuark bt_event_name; | |
24 | ||
70bd0a12 JD |
25 | /* Forward declarations */ |
26 | struct babeltrace_iter; | |
70bd0a12 JD |
27 | struct ctf_stream_event; |
28 | struct ctf_stream; | |
c34ccddd MD |
29 | struct bt_dependencies; |
30 | ||
31 | enum bt_cb_ret { | |
32 | BT_CB_OK = 0, | |
33 | BT_CB_OK_STOP = 1, | |
34 | BT_CB_ERROR_STOP = 2, | |
35 | BT_CB_ERROR_CONTINUE = 3, | |
36 | }; | |
063f7048 | 37 | |
e73cc54c JD |
38 | struct bt_ctf_data { |
39 | struct ctf_stream_event *event; | |
f970ae1d | 40 | struct ctf_stream *stream; |
e73cc54c JD |
41 | }; |
42 | ||
c34ccddd MD |
43 | /* |
44 | * Receives a variable number of strings as parameter, ended with NULL. | |
45 | */ | |
46 | struct bt_dependencies *babeltrace_dependencies_create(const char *first, ...); | |
47 | ||
48 | /* | |
49 | * struct bt_dependencies must be destroyed explicitly if not passed as | |
50 | * parameter to a babeltrace_iter_add_callback(). | |
51 | */ | |
52 | void babeltrace_dependencies_destroy(struct bt_dependencies *dep); | |
53 | ||
54 | /* | |
55 | * babeltrace_iter_add_callback: Add a callback to iterator. | |
56 | * | |
57 | * @iter: trace collection iterator (input) | |
58 | * @event: event to target. 0 for all events. | |
59 | * @private_data: private data pointer to pass to the callback | |
60 | * @flags: specific flags controlling the behavior of this callback | |
61 | * (or'd). | |
62 | * | |
63 | * @callback: function pointer to call | |
64 | * @depends: struct bt_dependency detailing the required computation results. | |
65 | * Ends with 0. | |
66 | * @weak_depends: struct bt_dependency detailing the optional computation | |
67 | * results that can be optionally consumed by this | |
68 | * callback. | |
69 | * @provides: struct bt_dependency detailing the computation results | |
70 | * provided by this callback. | |
71 | * Ends with 0. | |
72 | * | |
73 | * "depends", "weak_depends" and "provides" memory is handled by the | |
74 | * babeltrace library after this call succeeds or fails. These objects | |
75 | * can still be used by the caller until the babeltrace iterator is | |
76 | * destroyed, but they belong to the babeltrace library. | |
77 | * | |
78 | * (note to implementor: we need to keep a gptrarray of struct | |
79 | * bt_dependencies to "garbage collect" in struct babeltrace_iter, and | |
80 | * dependencies need to have a refcount to handle the case where they | |
81 | * would be passed to more than one iterator. Upon iterator detroy, we | |
82 | * iterate on all the gc ptrarray and decrement the refcounts, freeing | |
83 | * if we reach 0.) | |
84 | * (note to implementor: we calculate the dependency graph when | |
85 | * babeltrace_iter_read_event() is executed after a | |
86 | * babeltrace_iter_add_callback(). Beware that it is valid to create/add | |
87 | * callbacks/read/add more callbacks/read some more.) | |
88 | */ | |
89 | int babeltrace_iter_add_callback(struct babeltrace_iter *iter, | |
90 | bt_event_name event, void *private_data, int flags, | |
e73cc54c JD |
91 | enum bt_cb_ret (*callback)(struct bt_ctf_data *ctf_data, |
92 | void *caller_data), | |
c34ccddd MD |
93 | struct bt_dependencies *depends, |
94 | struct bt_dependencies *weak_depends, | |
95 | struct bt_dependencies *provides); | |
96 | ||
97 | /* | |
98 | * For flags parameter above. | |
99 | */ | |
100 | enum { | |
101 | BT_FLAGS_FREE_PRIVATE_DATA = (1 << 0), | |
102 | }; | |
103 | ||
70bd0a12 | 104 | #endif /* _BABELTRACE_H */ |