2 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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
23 #define BT_LOG_TAG "QUERY-EXECUTOR"
24 #include <babeltrace/lib-logging-internal.h>
26 #include <babeltrace/assert-internal.h>
27 #include <babeltrace/assert-pre-internal.h>
28 #include <babeltrace/graph/query-executor-const.h>
29 #include <babeltrace/graph/query-executor.h>
30 #include <babeltrace/graph/query-executor-internal.h>
31 #include <babeltrace/graph/component-class.h>
32 #include <babeltrace/graph/component-class-internal.h>
33 #include <babeltrace/value.h>
34 #include <babeltrace/value-const.h>
35 #include <babeltrace/object-internal.h>
36 #include <babeltrace/compiler-internal.h>
39 void bt_query_executor_destroy(struct bt_object
*obj
)
41 struct bt_query_executor
*query_exec
=
42 container_of(obj
, struct bt_query_executor
, base
);
44 BT_LOGD("Destroying query executor: addr=%p", query_exec
);
48 struct bt_query_executor
*bt_query_executor_create(void)
50 struct bt_query_executor
*query_exec
;
52 BT_LOGD_STR("Creating query executor.");
53 query_exec
= g_new0(struct bt_query_executor
, 1);
55 BT_LOGE_STR("Failed to allocate one query executor.");
59 bt_object_init_shared(&query_exec
->base
,
60 bt_query_executor_destroy
);
61 BT_LOGD("Created query executor: addr=%p", query_exec
);
64 return (void *) query_exec
;
67 enum bt_query_executor_status
bt_query_executor_query(
68 struct bt_query_executor
*query_exec
,
69 const struct bt_component_class
*comp_cls
,
70 const char *object
, const struct bt_value
*params
,
71 const struct bt_value
**user_result
)
73 typedef enum bt_query_status (*method_t
)(void *, const void *,
74 const void *, const void *, const void *);
76 enum bt_query_status status
;
77 enum bt_query_executor_status exec_status
;
78 method_t method
= NULL
;
80 BT_ASSERT_PRE_NON_NULL(query_exec
, "Query executor");
81 BT_ASSERT_PRE_NON_NULL(comp_cls
, "Component class");
82 BT_ASSERT_PRE_NON_NULL(object
, "Object");
83 BT_ASSERT_PRE_NON_NULL(user_result
, "Result (output)");
84 BT_ASSERT_PRE(!query_exec
->canceled
, "Query executor is canceled.");
87 params
= bt_value_null
;
90 switch (comp_cls
->type
) {
91 case BT_COMPONENT_CLASS_TYPE_SOURCE
:
93 struct bt_component_class_source
*src_cc
= (void *) comp_cls
;
95 method
= (method_t
) src_cc
->methods
.query
;
98 case BT_COMPONENT_CLASS_TYPE_FILTER
:
100 struct bt_component_class_filter
*flt_cc
= (void *) comp_cls
;
102 method
= (method_t
) flt_cc
->methods
.query
;
105 case BT_COMPONENT_CLASS_TYPE_SINK
:
107 struct bt_component_class_sink
*sink_cc
= (void *) comp_cls
;
109 method
= (method_t
) sink_cc
->methods
.query
;
117 /* Not an error: nothing to query */
118 BT_LIB_LOGD("Component class has no registered query method: "
120 exec_status
= BT_QUERY_EXECUTOR_STATUS_UNSUPPORTED
;
124 BT_LIB_LOGD("Calling user's query method: "
125 "query-exec-addr=%p, %![cc-]+C, object=\"%s\", %![params-]+v",
126 query_exec
, comp_cls
, object
, params
);
128 status
= method((void *) comp_cls
, query_exec
, object
, params
,
130 BT_LIB_LOGD("User method returned: status=%s, %![res-]+v",
131 bt_query_status_string(status
), *user_result
);
132 BT_ASSERT_PRE(status
!= BT_QUERY_STATUS_OK
|| *user_result
,
133 "User method returned `BT_QUERY_STATUS_OK` without a result.");
134 exec_status
= (int) status
;
135 if (query_exec
->canceled
) {
136 BT_OBJECT_PUT_REF_AND_RESET(*user_result
);
137 exec_status
= BT_QUERY_EXECUTOR_STATUS_CANCELED
;
145 enum bt_query_executor_status
bt_query_executor_cancel(
146 struct bt_query_executor
*query_exec
)
148 BT_ASSERT_PRE_NON_NULL(query_exec
, "Query executor");
149 query_exec
->canceled
= BT_TRUE
;
150 BT_LOGV("Canceled query executor: addr=%p", query_exec
);
151 return BT_QUERY_EXECUTOR_STATUS_OK
;
154 bt_bool
bt_query_executor_is_canceled(const struct bt_query_executor
*query_exec
)
156 BT_ASSERT_PRE_NON_NULL(query_exec
, "Query executor");
157 return query_exec
->canceled
;
160 void bt_query_executor_get_ref(const struct bt_query_executor
*query_executor
)
162 bt_object_get_ref(query_executor
);
165 void bt_query_executor_put_ref(const struct bt_query_executor
*query_executor
)
167 bt_object_put_ref(query_executor
);