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b469d2dd JD |
1 | /* |
2 | * context.c | |
3 | * | |
4 | * Babeltrace Library | |
5 | * | |
6 | * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation | |
7 | * | |
8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
9 | * Julien Desfossez <julien.desfossez@efficios.com> | |
10 | * | |
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: | |
17 | * | |
18 | * The above copyright notice and this permission notice shall be included in | |
19 | * all copies or substantial portions of the Software. | |
c462e188 MD |
20 | * |
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 | |
27 | * SOFTWARE. | |
b469d2dd JD |
28 | */ |
29 | ||
30 | #include <babeltrace/babeltrace.h> | |
31 | #include <babeltrace/context.h> | |
08c22d05 | 32 | #include <babeltrace/context-internal.h> |
6cba487f MD |
33 | #include <babeltrace/trace-handle.h> |
34 | #include <babeltrace/trace-handle-internal.h> | |
35 | #include <babeltrace/trace-collection.h> | |
36 | #include <babeltrace/format.h> | |
9a7312d3 | 37 | #include <babeltrace/format-internal.h> |
e1d01c39 | 38 | #include <babeltrace/babeltrace-internal.h> |
b469d2dd | 39 | #include <stdlib.h> |
e1d01c39 MD |
40 | #include <string.h> |
41 | #include <assert.h> | |
7f89ddce | 42 | #include <errno.h> |
b469d2dd | 43 | |
6cba487f MD |
44 | #include <fcntl.h> /* For O_RDONLY */ |
45 | ||
6cba487f MD |
46 | #include <glib.h> |
47 | ||
9a7312d3 JG |
48 | static |
49 | void remove_trace_handle(struct bt_trace_handle *handle); | |
50 | ||
6cba487f | 51 | struct bt_context *bt_context_create(void) |
b469d2dd JD |
52 | { |
53 | struct bt_context *ctx; | |
54 | ||
6cba487f | 55 | ctx = g_new0(struct bt_context, 1); |
b469d2dd | 56 | ctx->refcount = 1; |
6cba487f | 57 | /* Negative handle id are errors. */ |
842c2b97 | 58 | ctx->last_trace_handle_id = 0; |
b469d2dd | 59 | |
6cba487f MD |
60 | /* Instanciate the trace handle container */ |
61 | ctx->trace_handles = g_hash_table_new_full(g_direct_hash, | |
62 | g_direct_equal, NULL, | |
9a7312d3 | 63 | (GDestroyNotify) remove_trace_handle); |
6cba487f | 64 | |
e003e871 | 65 | ctx->current_iterator = NULL; |
6cba487f | 66 | ctx->tc = g_new0(struct trace_collection, 1); |
2552c374 | 67 | bt_init_trace_collection(ctx->tc); |
6cba487f | 68 | |
b469d2dd | 69 | return ctx; |
6cba487f | 70 | } |
b469d2dd | 71 | |
6cba487f | 72 | int bt_context_add_trace(struct bt_context *ctx, const char *path, |
613f532b | 73 | const char *format_name, |
1cf393f6 | 74 | void (*packet_seek)(struct bt_stream_pos *pos, size_t index, |
0d4c669f | 75 | int whence), |
c150f912 | 76 | struct bt_mmap_stream_list *stream_list, |
0d4c669f | 77 | FILE *metadata) |
6cba487f | 78 | { |
1b8455b7 | 79 | struct bt_trace_descriptor *td; |
37b99bdb | 80 | struct bt_format *fmt; |
6cba487f | 81 | struct bt_trace_handle *handle; |
f824ae04 | 82 | int ret, closeret; |
6cba487f | 83 | |
7f89ddce MD |
84 | if (!ctx || !format_name || (!path && !stream_list)) |
85 | return -EINVAL; | |
86 | ||
282e1952 MD |
87 | fmt = bt_lookup_format(g_quark_from_string(format_name)); |
88 | if (!fmt) { | |
89 | fprintf(stderr, "[error] [Context] Format \"%s\" unknown.\n\n", | |
90 | format_name); | |
91 | ret = -1; | |
92 | goto end; | |
93 | } | |
0d4c669f MD |
94 | if (path) { |
95 | td = fmt->open_trace(path, O_RDONLY, packet_seek, NULL); | |
96 | if (!td) { | |
abc40d24 | 97 | fprintf(stderr, "[warning] [Context] Cannot open_trace of format %s at path %s.\n", |
0d575aea | 98 | format_name, path); |
0d4c669f MD |
99 | ret = -1; |
100 | goto end; | |
101 | } | |
102 | } else { | |
103 | td = fmt->open_mmap_trace(stream_list, packet_seek, metadata); | |
104 | if (!td) { | |
0d575aea SM |
105 | fprintf(stderr, "[error] [Context] Cannot open_mmap_trace of format %s.\n\n", |
106 | format_name); | |
0d4c669f MD |
107 | ret = -1; |
108 | goto end; | |
109 | } | |
6cba487f MD |
110 | } |
111 | ||
112 | /* Create an handle for the trace */ | |
113 | handle = bt_trace_handle_create(ctx); | |
642871ed | 114 | if (!handle) { |
02dc4610 | 115 | fprintf(stderr, "[error] [Context] Creating trace handle %s .\n\n", |
6cba487f | 116 | path); |
1059a2bf | 117 | ret = -1; |
e6d85e38 | 118 | goto error; |
6cba487f MD |
119 | } |
120 | handle->format = fmt; | |
121 | handle->td = td; | |
afe9cd4a JD |
122 | if (path) { |
123 | strncpy(handle->path, path, PATH_MAX); | |
124 | handle->path[PATH_MAX - 1] = '\0'; | |
125 | } | |
6cba487f | 126 | |
98a04903 JD |
127 | if (fmt->set_handle) |
128 | fmt->set_handle(td, handle); | |
129 | if (fmt->set_context) | |
130 | fmt->set_context(td, ctx); | |
131 | ||
6cba487f MD |
132 | /* Add new handle to container */ |
133 | g_hash_table_insert(ctx->trace_handles, | |
134 | (gpointer) (unsigned long) handle->id, | |
135 | handle); | |
2552c374 | 136 | ret = bt_trace_collection_add(ctx->tc, td); |
03798a93 | 137 | if (ret != 0) |
e6d85e38 | 138 | goto error; |
03798a93 | 139 | |
34d99418 JD |
140 | if (fmt->convert_index_timestamp) { |
141 | ret = fmt->convert_index_timestamp(td); | |
142 | if (ret < 0) | |
143 | goto error; | |
144 | } | |
03798a93 | 145 | |
34d99418 JD |
146 | if (fmt->timestamp_begin) |
147 | handle->real_timestamp_begin = fmt->timestamp_begin(td, | |
148 | handle, BT_CLOCK_REAL); | |
149 | if (fmt->timestamp_end) | |
150 | handle->real_timestamp_end = fmt->timestamp_end(td, handle, | |
151 | BT_CLOCK_REAL); | |
152 | if (fmt->timestamp_begin) | |
153 | handle->cycles_timestamp_begin = fmt->timestamp_begin(td, | |
154 | handle, BT_CLOCK_CYCLES); | |
155 | if (fmt->timestamp_end) | |
156 | handle->cycles_timestamp_end = fmt->timestamp_end(td, handle, | |
157 | BT_CLOCK_CYCLES); | |
03798a93 JD |
158 | |
159 | return handle->id; | |
e6d85e38 JD |
160 | |
161 | error: | |
f824ae04 MD |
162 | closeret = fmt->close_trace(td); |
163 | if (closeret) { | |
164 | fprintf(stderr, "Error in close_trace callback\n"); | |
165 | } | |
1059a2bf JD |
166 | end: |
167 | return ret; | |
b469d2dd JD |
168 | } |
169 | ||
7f89ddce | 170 | int bt_context_remove_trace(struct bt_context *ctx, int handle_id) |
b469d2dd | 171 | { |
9a7312d3 | 172 | int ret = 0; |
6cba487f | 173 | |
9a7312d3 JG |
174 | if (!ctx) { |
175 | ret = -EINVAL; | |
176 | goto end; | |
177 | } | |
6cba487f | 178 | |
9a7312d3 JG |
179 | /* |
180 | * Remove the handle. remove_trace_handle will be called | |
181 | * automatically. | |
182 | */ | |
183 | if (!g_hash_table_remove(ctx->trace_handles, | |
184 | (gpointer) (unsigned long) handle_id)) { | |
185 | ret = -ENOENT; | |
186 | goto end; | |
f824ae04 | 187 | } |
9a7312d3 JG |
188 | end: |
189 | return ret; | |
6cba487f MD |
190 | } |
191 | ||
192 | static | |
193 | void bt_context_destroy(struct bt_context *ctx) | |
194 | { | |
7f89ddce | 195 | assert(ctx); |
6cba487f | 196 | |
e6d85e38 JD |
197 | /* |
198 | * Remove all traces. The g_hash_table_destroy will call | |
9a7312d3 | 199 | * remove_trace_handle on each element. |
6cba487f MD |
200 | */ |
201 | g_hash_table_destroy(ctx->trace_handles); | |
202 | ||
9a7312d3 JG |
203 | bt_finalize_trace_collection(ctx->tc); |
204 | ||
6cba487f MD |
205 | /* ctx->tc should always be valid */ |
206 | assert(ctx->tc != NULL); | |
207 | g_free(ctx->tc); | |
208 | g_free(ctx); | |
b469d2dd JD |
209 | } |
210 | ||
6cba487f | 211 | void bt_context_get(struct bt_context *ctx) |
b469d2dd | 212 | { |
7f89ddce | 213 | assert(ctx); |
6cba487f MD |
214 | ctx->refcount++; |
215 | } | |
b469d2dd | 216 | |
6cba487f MD |
217 | void bt_context_put(struct bt_context *ctx) |
218 | { | |
7f89ddce | 219 | assert(ctx); |
b469d2dd JD |
220 | ctx->refcount--; |
221 | if (ctx->refcount == 0) | |
6cba487f | 222 | bt_context_destroy(ctx); |
b469d2dd | 223 | } |
9a7312d3 JG |
224 | |
225 | static | |
226 | void remove_trace_handle(struct bt_trace_handle *handle) | |
227 | { | |
228 | int ret; | |
229 | ||
34d99418 JD |
230 | if (!handle->td->ctx) |
231 | return; | |
9a7312d3 JG |
232 | /* Remove from containers */ |
233 | bt_trace_collection_remove(handle->td->ctx->tc, handle->td); | |
234 | /* Close the trace */ | |
235 | ret = handle->format->close_trace(handle->td); | |
236 | if (ret) { | |
237 | fprintf(stderr, "Error in close_trace callback\n"); | |
238 | } | |
239 | ||
240 | bt_trace_handle_destroy(handle); | |
241 | } |