Commit | Line | Data |
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1286dcbb | 1 | /* |
f2b0325d | 2 | * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com> |
1286dcbb PP |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
21 | */ | |
22 | ||
b03487ab | 23 | #define BT_LOG_TAG "LIB/QUERY-EXECUTOR" |
1633ef46 | 24 | #include "lib/logging.h" |
1286dcbb | 25 | |
57952005 | 26 | #include "common/assert.h" |
83da519a | 27 | #include "common/common.h" |
57952005 | 28 | #include "lib/assert-pre.h" |
3b7d3ccc | 29 | #include "lib/assert-post.h" |
71c5da58 MJ |
30 | #include <babeltrace2/graph/query-executor-const.h> |
31 | #include <babeltrace2/graph/query-executor.h> | |
71c5da58 | 32 | #include <babeltrace2/graph/component-class.h> |
71c5da58 MJ |
33 | #include <babeltrace2/value.h> |
34 | #include <babeltrace2/value-const.h> | |
57952005 MJ |
35 | #include "lib/object.h" |
36 | #include "compat/compiler.h" | |
37 | ||
38 | #include "component-class.h" | |
39 | #include "query-executor.h" | |
d73bb381 | 40 | #include "interrupter.h" |
fb25b9e3 | 41 | #include "lib/func-status.h" |
1286dcbb PP |
42 | |
43 | static | |
44 | void bt_query_executor_destroy(struct bt_object *obj) | |
45 | { | |
46 | struct bt_query_executor *query_exec = | |
47 | container_of(obj, struct bt_query_executor, base); | |
48 | ||
834e9996 | 49 | BT_LOGD("Destroying query executor: addr=%p", query_exec); |
d73bb381 PP |
50 | |
51 | if (query_exec->interrupters) { | |
52 | BT_LOGD_STR("Putting interrupters."); | |
53 | g_ptr_array_free(query_exec->interrupters, TRUE); | |
54 | query_exec->interrupters = NULL; | |
55 | } | |
56 | ||
bf403eb2 PP |
57 | BT_LOGD_STR("Putting component class."); |
58 | BT_OBJECT_PUT_REF_AND_RESET(query_exec->comp_cls); | |
59 | ||
60 | if (query_exec->object) { | |
61 | g_string_free(query_exec->object, TRUE); | |
62 | query_exec->object = NULL; | |
63 | } | |
d73bb381 | 64 | |
bf403eb2 PP |
65 | BT_LOGD_STR("Putting parameters."); |
66 | BT_OBJECT_PUT_REF_AND_RESET(query_exec->params); | |
67 | BT_OBJECT_PUT_REF_AND_RESET(query_exec->default_interrupter); | |
1286dcbb PP |
68 | g_free(query_exec); |
69 | } | |
70 | ||
f6e305ce | 71 | struct bt_query_executor *bt_query_executor_create_with_method_data( |
bf403eb2 | 72 | const bt_component_class *comp_cls, const char *object, |
f6e305ce | 73 | const bt_value *params, void *method_data) |
1286dcbb PP |
74 | { |
75 | struct bt_query_executor *query_exec; | |
76 | ||
bf403eb2 PP |
77 | BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class"); |
78 | BT_ASSERT_PRE_NON_NULL(object, "Object"); | |
79 | BT_LIB_LOGD("Creating query executor: " | |
013ff1e5 | 80 | "%![comp-cls-]+C, object=\"%s\", %![params-]+v", |
bf403eb2 | 81 | comp_cls, object, params); |
1286dcbb PP |
82 | query_exec = g_new0(struct bt_query_executor, 1); |
83 | if (!query_exec) { | |
a8f90e5d PP |
84 | BT_LIB_LOGE_APPEND_CAUSE( |
85 | "Failed to allocate one query executor."); | |
1286dcbb PP |
86 | goto end; |
87 | } | |
88 | ||
d73bb381 | 89 | query_exec->interrupters = g_ptr_array_new_with_free_func( |
864aa43f | 90 | (GDestroyNotify) bt_object_put_ref_no_null_check); |
d73bb381 PP |
91 | if (!query_exec->interrupters) { |
92 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GPtrArray."); | |
93 | BT_OBJECT_PUT_REF_AND_RESET(query_exec); | |
94 | goto end; | |
95 | } | |
96 | ||
97 | query_exec->default_interrupter = bt_interrupter_create(); | |
98 | if (!query_exec->default_interrupter) { | |
99 | BT_LIB_LOGE_APPEND_CAUSE( | |
100 | "Failed to create one interrupter object."); | |
101 | BT_OBJECT_PUT_REF_AND_RESET(query_exec); | |
102 | goto end; | |
103 | } | |
104 | ||
bf403eb2 PP |
105 | query_exec->object = g_string_new(object); |
106 | if (!query_exec->object) { | |
107 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GString."); | |
108 | BT_OBJECT_PUT_REF_AND_RESET(query_exec); | |
109 | goto end; | |
110 | } | |
111 | ||
112 | query_exec->comp_cls = comp_cls; | |
864aa43f | 113 | bt_object_get_ref_no_null_check(query_exec->comp_cls); |
bf403eb2 PP |
114 | |
115 | if (!params) { | |
116 | query_exec->params = bt_value_null; | |
117 | } else { | |
118 | query_exec->params = params; | |
119 | } | |
120 | ||
864aa43f | 121 | bt_object_get_ref_no_null_check(query_exec->params); |
f6e305ce | 122 | query_exec->method_data = method_data; |
bf403eb2 | 123 | query_exec->log_level = BT_LOGGING_LEVEL_NONE; |
d73bb381 PP |
124 | bt_query_executor_add_interrupter(query_exec, |
125 | query_exec->default_interrupter); | |
1d7bf349 PP |
126 | bt_object_init_shared(&query_exec->base, |
127 | bt_query_executor_destroy); | |
bf403eb2 | 128 | BT_LIB_LOGD("Created query executor: " |
013ff1e5 | 129 | "addr=%p, %![comp-cls-]+C, object=\"%s\", %![params-]+v", |
bf403eb2 | 130 | query_exec, comp_cls, object, params); |
1286dcbb PP |
131 | |
132 | end: | |
834e9996 | 133 | return (void *) query_exec; |
1286dcbb PP |
134 | } |
135 | ||
f6e305ce PP |
136 | struct bt_query_executor *bt_query_executor_create( |
137 | const bt_component_class *comp_cls, const char *object, | |
138 | const bt_value *params) | |
139 | { | |
140 | return bt_query_executor_create_with_method_data(comp_cls, | |
141 | object, params, NULL); | |
142 | } | |
143 | ||
fb25b9e3 | 144 | enum bt_query_executor_query_status bt_query_executor_query( |
7b53201c | 145 | struct bt_query_executor *query_exec, |
ce141536 | 146 | const struct bt_value **user_result) |
1286dcbb | 147 | { |
bf403eb2 PP |
148 | typedef enum bt_component_class_query_method_status (*method_t)( |
149 | void * /* self component class */, | |
150 | void * /* private query executor */, | |
151 | const char * /* object */, | |
152 | const struct bt_value * /* parameters */, | |
f6e305ce | 153 | void * /* method data */, |
bf403eb2 | 154 | const struct bt_value ** /* result */); |
1286dcbb | 155 | |
fb25b9e3 PP |
156 | enum bt_query_executor_query_status status; |
157 | enum bt_component_class_query_method_status query_status; | |
834e9996 | 158 | method_t method = NULL; |
1286dcbb | 159 | |
834e9996 | 160 | BT_ASSERT_PRE_NON_NULL(query_exec, "Query executor"); |
834e9996 | 161 | BT_ASSERT_PRE_NON_NULL(user_result, "Result (output)"); |
834e9996 | 162 | |
c7f8c4e4 PP |
163 | /* |
164 | * Initial check: is the query executor already interrupted? If | |
165 | * so, return `BT_FUNC_STATUS_AGAIN`. Returning this status is | |
166 | * harmless: it's not `BT_FUNC_STATUS_OK` (there's no result), | |
167 | * and it's not `BT_FUNC_STATUS_ERROR` either (there's no | |
168 | * legitimate error). Since any query operation could return | |
169 | * `BT_FUNC_STATUS_AGAIN` when interrupted or instead of | |
170 | * blocking, the caller is responsible for checking the | |
171 | * interruption state of the query executor when getting this | |
172 | * status. | |
173 | */ | |
174 | if (bt_query_executor_is_interrupted(query_exec)) { | |
175 | BT_LIB_LOGD("Query executor is interrupted: " | |
176 | "not performing the query operation: " | |
177 | "query-exec-addr=%p, %![cc-]+C, object=\"%s\", " | |
178 | "%![params-]+v, log-level=%s", | |
bf403eb2 PP |
179 | query_exec, query_exec->comp_cls, |
180 | query_exec->object->str, query_exec->params, | |
181 | bt_common_logging_level_string(query_exec->log_level)); | |
c7f8c4e4 PP |
182 | status = BT_FUNC_STATUS_AGAIN; |
183 | goto end; | |
184 | } | |
185 | ||
bf403eb2 | 186 | switch (query_exec->comp_cls->type) { |
834e9996 PP |
187 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
188 | { | |
bf403eb2 PP |
189 | struct bt_component_class_source *src_cc = (void *) |
190 | query_exec->comp_cls; | |
834e9996 PP |
191 | |
192 | method = (method_t) src_cc->methods.query; | |
193 | break; | |
1286dcbb | 194 | } |
834e9996 PP |
195 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
196 | { | |
bf403eb2 PP |
197 | struct bt_component_class_filter *flt_cc = (void *) |
198 | query_exec->comp_cls; | |
1286dcbb | 199 | |
834e9996 PP |
200 | method = (method_t) flt_cc->methods.query; |
201 | break; | |
1286dcbb | 202 | } |
834e9996 PP |
203 | case BT_COMPONENT_CLASS_TYPE_SINK: |
204 | { | |
bf403eb2 PP |
205 | struct bt_component_class_sink *sink_cc = (void *) |
206 | query_exec->comp_cls; | |
1286dcbb | 207 | |
834e9996 PP |
208 | method = (method_t) sink_cc->methods.query; |
209 | break; | |
210 | } | |
211 | default: | |
24847fc7 | 212 | bt_common_abort(); |
1286dcbb PP |
213 | } |
214 | ||
834e9996 | 215 | if (!method) { |
1286dcbb | 216 | /* Not an error: nothing to query */ |
834e9996 | 217 | BT_LIB_LOGD("Component class has no registered query method: " |
bf403eb2 | 218 | "%!+C", query_exec->comp_cls); |
7dd3e712 | 219 | status = BT_FUNC_STATUS_UNKNOWN_OBJECT; |
1286dcbb PP |
220 | goto end; |
221 | } | |
222 | ||
834e9996 | 223 | BT_LIB_LOGD("Calling user's query method: " |
83da519a PP |
224 | "query-exec-addr=%p, %![cc-]+C, object=\"%s\", %![params-]+v, " |
225 | "log-level=%s", | |
bf403eb2 PP |
226 | query_exec, query_exec->comp_cls, query_exec->object->str, |
227 | query_exec->params, | |
228 | bt_common_logging_level_string(query_exec->log_level)); | |
834e9996 | 229 | *user_result = NULL; |
bf403eb2 PP |
230 | query_status = method((void *) query_exec->comp_cls, |
231 | (void *) query_exec, query_exec->object->str, | |
f6e305ce | 232 | query_exec->params, query_exec->method_data, user_result); |
834e9996 | 233 | BT_LIB_LOGD("User method returned: status=%s, %![res-]+v", |
fb25b9e3 PP |
234 | bt_common_func_status_string(query_status), *user_result); |
235 | BT_ASSERT_POST(query_status != BT_FUNC_STATUS_OK || *user_result, | |
236 | "User method returned `BT_FUNC_STATUS_OK` without a result."); | |
237 | status = (int) query_status; | |
1286dcbb | 238 | |
574dea68 SM |
239 | if (status < 0) { |
240 | BT_LIB_LOGW_APPEND_CAUSE( | |
241 | "Component class's \"query\" method failed: " | |
242 | "query-exec-addr=%p, %![cc-]+C, object=\"%s\", " | |
bf403eb2 PP |
243 | "%![params-]+v, log-level=%s", query_exec, |
244 | query_exec->comp_cls, query_exec->object->str, | |
245 | query_exec->params, | |
246 | bt_common_logging_level_string(query_exec->log_level)); | |
574dea68 SM |
247 | goto end; |
248 | } | |
249 | ||
1286dcbb | 250 | end: |
fb25b9e3 | 251 | return status; |
1286dcbb PP |
252 | } |
253 | ||
d73bb381 PP |
254 | enum bt_query_executor_add_interrupter_status bt_query_executor_add_interrupter( |
255 | struct bt_query_executor *query_exec, | |
256 | const struct bt_interrupter *intr) | |
1286dcbb | 257 | { |
834e9996 | 258 | BT_ASSERT_PRE_NON_NULL(query_exec, "Query executor"); |
d73bb381 PP |
259 | BT_ASSERT_PRE_NON_NULL(intr, "Interrupter"); |
260 | g_ptr_array_add(query_exec->interrupters, (void *) intr); | |
864aa43f | 261 | bt_object_get_ref_no_null_check(intr); |
d73bb381 PP |
262 | BT_LIB_LOGD("Added interrupter to query executor: " |
263 | "query-exec-addr=%p, %![intr-]+z", | |
264 | query_exec, intr); | |
fb25b9e3 | 265 | return BT_FUNC_STATUS_OK; |
1286dcbb PP |
266 | } |
267 | ||
d73bb381 | 268 | bt_bool bt_query_executor_is_interrupted(const struct bt_query_executor *query_exec) |
1286dcbb | 269 | { |
d73bb381 PP |
270 | BT_ASSERT_PRE_NON_NULL(query_exec, "Query executor"); |
271 | return (bt_bool) bt_interrupter_array_any_is_set( | |
272 | query_exec->interrupters); | |
273 | } | |
274 | ||
275 | void bt_query_executor_interrupt(struct bt_query_executor *query_exec) | |
276 | { | |
277 | BT_ASSERT_PRE_NON_NULL(query_exec, "Query executor"); | |
278 | bt_interrupter_set(query_exec->default_interrupter); | |
279 | BT_LIB_LOGI("Interrupted query executor: query-exec-addr=%p", | |
280 | query_exec); | |
1286dcbb | 281 | } |
8c6884d9 | 282 | |
bf403eb2 PP |
283 | enum bt_query_executor_set_logging_level_status |
284 | bt_query_executor_set_logging_level(struct bt_query_executor *query_exec, | |
285 | enum bt_logging_level log_level) | |
286 | { | |
287 | BT_ASSERT_PRE_NON_NULL(query_exec, "Query executor"); | |
288 | query_exec->log_level = log_level; | |
289 | return BT_FUNC_STATUS_OK; | |
290 | } | |
291 | ||
292 | enum bt_logging_level bt_query_executor_get_logging_level( | |
293 | const struct bt_query_executor *query_exec) | |
294 | { | |
295 | BT_ASSERT_PRE_NON_NULL(query_exec, "Query executor"); | |
296 | return query_exec->log_level; | |
297 | } | |
298 | ||
8c6884d9 PP |
299 | void bt_query_executor_get_ref(const struct bt_query_executor *query_executor) |
300 | { | |
301 | bt_object_get_ref(query_executor); | |
302 | } | |
303 | ||
304 | void bt_query_executor_put_ref(const struct bt_query_executor *query_executor) | |
305 | { | |
306 | bt_object_put_ref(query_executor); | |
307 | } |