2 * Copyright 2017 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/graph/private-query-executor.h>
27 #include <babeltrace/graph/query-executor.h>
28 #include <babeltrace/graph/query-executor-internal.h>
29 #include <babeltrace/graph/component-class.h>
30 #include <babeltrace/graph/component-class-internal.h>
31 #include <babeltrace/values.h>
32 #include <babeltrace/values-const.h>
33 #include <babeltrace/object-internal.h>
34 #include <babeltrace/object.h>
35 #include <babeltrace/compiler-internal.h>
36 #include <babeltrace/assert-internal.h>
37 #include <babeltrace/assert-pre-internal.h>
40 void bt_query_executor_destroy(struct bt_object
*obj
)
42 struct bt_query_executor
*query_exec
=
43 container_of(obj
, struct bt_query_executor
, base
);
45 BT_LOGD("Destroying query executor: addr=%p", query_exec
);
49 struct bt_private_query_executor
*bt_private_query_executor_create(void)
51 struct bt_query_executor
*query_exec
;
53 BT_LOGD_STR("Creating query executor.");
54 query_exec
= g_new0(struct bt_query_executor
, 1);
56 BT_LOGE_STR("Failed to allocate one query executor.");
60 bt_object_init_shared(&query_exec
->base
,
61 bt_query_executor_destroy
);
62 BT_LOGD("Created query executor: addr=%p", query_exec
);
65 return (void *) query_exec
;
68 enum bt_query_executor_status
bt_private_query_executor_query(
69 struct bt_private_query_executor
*priv_query_exec
,
70 struct bt_component_class
*comp_cls
,
71 const char *object
, const struct bt_value
*params
,
72 const struct bt_value
**user_result
)
74 typedef enum bt_query_status (*method_t
)(void *, void *,
75 const void *, const void *, void *);
77 struct bt_query_executor
*query_exec
= (void *) priv_query_exec
;
78 enum bt_query_status status
;
79 enum bt_query_executor_status exec_status
;
80 method_t method
= NULL
;
82 BT_ASSERT_PRE_NON_NULL(query_exec
, "Query executor");
83 BT_ASSERT_PRE_NON_NULL(comp_cls
, "Component class");
84 BT_ASSERT_PRE_NON_NULL(object
, "Object");
85 BT_ASSERT_PRE_NON_NULL(user_result
, "Result (output)");
86 BT_ASSERT_PRE(!query_exec
->canceled
, "Query executor is canceled.");
89 params
= bt_value_null
;
92 switch (comp_cls
->type
) {
93 case BT_COMPONENT_CLASS_TYPE_SOURCE
:
95 struct bt_component_class_source
*src_cc
= (void *) comp_cls
;
97 method
= (method_t
) src_cc
->methods
.query
;
100 case BT_COMPONENT_CLASS_TYPE_FILTER
:
102 struct bt_component_class_filter
*flt_cc
= (void *) comp_cls
;
104 method
= (method_t
) flt_cc
->methods
.query
;
107 case BT_COMPONENT_CLASS_TYPE_SINK
:
109 struct bt_component_class_sink
*sink_cc
= (void *) comp_cls
;
111 method
= (method_t
) sink_cc
->methods
.query
;
119 /* Not an error: nothing to query */
120 BT_LIB_LOGD("Component class has no registered query method: "
122 exec_status
= BT_QUERY_EXECUTOR_STATUS_UNSUPPORTED
;
126 BT_LIB_LOGD("Calling user's query method: "
127 "query-exec-addr=%p, %![cc-]+C, object=\"%s\", %![params-]+v",
128 query_exec
, comp_cls
, object
, params
);
130 status
= method(comp_cls
, query_exec
, object
, params
, user_result
);
131 BT_LIB_LOGD("User method returned: status=%s, %![res-]+v",
132 bt_query_status_string(status
), *user_result
);
133 BT_ASSERT_PRE(status
!= BT_QUERY_STATUS_OK
|| *user_result
,
134 "User method returned `BT_QUERY_STATUS_OK` without a result.");
135 exec_status
= (int) status
;
136 if (query_exec
->canceled
) {
137 BT_OBJECT_PUT_REF_AND_RESET(*user_result
);
138 status
= BT_QUERY_EXECUTOR_STATUS_CANCELED
;
146 enum bt_query_executor_status
bt_private_query_executor_cancel(
147 struct bt_private_query_executor
*priv_query_exec
)
149 struct bt_query_executor
*query_exec
= (void *) priv_query_exec
;
151 BT_ASSERT_PRE_NON_NULL(query_exec
, "Query executor");
152 query_exec
->canceled
= BT_TRUE
;
153 BT_LOGV("Canceled query executor: addr=%p", query_exec
);
154 return BT_QUERY_EXECUTOR_STATUS_OK
;
157 bt_bool
bt_query_executor_is_canceled(struct bt_query_executor
*query_exec
)
159 BT_ASSERT_PRE_NON_NULL(query_exec
, "Query executor");
160 return query_exec
->canceled
;