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706a18f9 PP |
1 | /* |
2 | * Copyright 2017 Philippe Proulx <pproulx@efficios.com> | |
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 | ||
23 | #define BT_LOG_TAG "COLANDER" | |
24 | #include <babeltrace/lib-logging-internal.h> | |
25 | ||
26 | #include <babeltrace/graph/component-class-sink.h> | |
27 | #include <babeltrace/graph/private-component-sink.h> | |
28 | #include <babeltrace/graph/private-port.h> | |
29 | #include <babeltrace/graph/private-connection.h> | |
30 | #include <glib.h> | |
31 | #include <assert.h> | |
32 | ||
33 | static | |
34 | struct bt_component_class *colander_comp_cls; | |
35 | ||
36 | struct colander_data { | |
37 | struct bt_notification **user_notif; | |
38 | struct bt_notification_iterator *notif_iter; | |
39 | }; | |
40 | ||
41 | static | |
42 | enum bt_component_status colander_init( | |
43 | struct bt_private_component *priv_comp, | |
44 | struct bt_value *params, void *init_method_data) | |
45 | { | |
46 | enum bt_component_status status = BT_COMPONENT_STATUS_OK; | |
47 | struct colander_data *colander_data = NULL; | |
48 | ||
49 | if (!init_method_data) { | |
50 | BT_LOGW_STR("Component initialization method data is NULL."); | |
51 | status = BT_COMPONENT_STATUS_INVALID; | |
52 | goto end; | |
53 | } | |
54 | ||
55 | colander_data = g_new0(struct colander_data, 1); | |
56 | if (!colander_data) { | |
57 | BT_LOGE_STR("Failed to allocate colander data."); | |
58 | status = BT_COMPONENT_STATUS_NOMEM; | |
59 | goto end; | |
60 | } | |
61 | ||
62 | colander_data->user_notif = init_method_data; | |
63 | status = bt_private_component_sink_add_input_private_port( | |
64 | priv_comp, "in", NULL, NULL); | |
65 | if (status != BT_COMPONENT_STATUS_OK) { | |
66 | BT_LOGE_STR("Cannot add input port."); | |
67 | goto end; | |
68 | } | |
69 | ||
70 | (void) bt_private_component_set_user_data(priv_comp, colander_data); | |
71 | ||
72 | end: | |
73 | return status; | |
74 | } | |
75 | ||
76 | static | |
77 | void colander_finalize(struct bt_private_component *priv_comp) | |
78 | { | |
79 | struct colander_data *colander_data = | |
80 | bt_private_component_get_user_data(priv_comp); | |
81 | ||
82 | if (!colander_data) { | |
83 | return; | |
84 | } | |
85 | ||
86 | if (colander_data->notif_iter) { | |
87 | bt_put(colander_data->notif_iter); | |
88 | } | |
89 | ||
90 | g_free(colander_data); | |
91 | } | |
92 | ||
93 | static | |
94 | void colander_port_connected(struct bt_private_component *priv_comp, | |
95 | struct bt_private_port *self_priv_port, | |
96 | struct bt_port *other_port) | |
97 | { | |
98 | enum bt_connection_status conn_status; | |
99 | struct bt_private_connection *priv_conn = | |
100 | bt_private_port_get_private_connection(self_priv_port); | |
101 | struct colander_data *colander_data = | |
102 | bt_private_component_get_user_data(priv_comp); | |
103 | ||
104 | assert(priv_conn); | |
105 | assert(colander_data); | |
106 | BT_PUT(colander_data->notif_iter); | |
107 | conn_status = bt_private_connection_create_notification_iterator( | |
108 | priv_conn, NULL, &colander_data->notif_iter); | |
109 | if (conn_status) { | |
110 | BT_LOGE("Cannot create notification iterator from connection: " | |
111 | "comp-addr=%p, conn-addr=%p", priv_comp, priv_conn); | |
112 | goto end; | |
113 | } | |
114 | ||
115 | end: | |
116 | bt_put(priv_conn); | |
117 | } | |
118 | ||
119 | static | |
120 | enum bt_component_status colander_consume( | |
121 | struct bt_private_component *priv_comp) | |
122 | { | |
123 | enum bt_component_status status = BT_COMPONENT_STATUS_OK; | |
124 | enum bt_notification_iterator_status notif_iter_status; | |
125 | struct bt_notification *notif = NULL; | |
126 | struct colander_data *colander_data = | |
127 | bt_private_component_get_user_data(priv_comp); | |
128 | ||
129 | assert(colander_data); | |
130 | ||
131 | if (!colander_data->notif_iter) { | |
132 | BT_LOGW("Trying to consume without an upstream notification iterator: " | |
133 | "comp-addr=%p", priv_comp); | |
134 | goto end; | |
135 | } | |
136 | ||
137 | notif_iter_status = bt_notification_iterator_next( | |
138 | colander_data->notif_iter); | |
139 | switch (notif_iter_status) { | |
140 | case BT_NOTIFICATION_ITERATOR_STATUS_CANCELED: | |
141 | status = BT_COMPONENT_STATUS_OK; | |
142 | goto end; | |
143 | case BT_NOTIFICATION_ITERATOR_STATUS_AGAIN: | |
144 | status = BT_COMPONENT_STATUS_AGAIN; | |
145 | goto end; | |
146 | case BT_NOTIFICATION_ITERATOR_STATUS_END: | |
147 | status = BT_COMPONENT_STATUS_END; | |
148 | goto end; | |
149 | case BT_NOTIFICATION_ITERATOR_STATUS_OK: | |
150 | break; | |
151 | default: | |
152 | status = BT_COMPONENT_STATUS_ERROR; | |
153 | goto end; | |
154 | } | |
155 | ||
156 | notif = bt_notification_iterator_get_notification( | |
157 | colander_data->notif_iter); | |
158 | assert(notif); | |
159 | ||
160 | end: | |
161 | /* Move notification to user's pointer, even if NULL. */ | |
162 | *colander_data->user_notif = notif; | |
163 | return status; | |
164 | } | |
165 | ||
166 | struct bt_component_class *bt_component_class_sink_colander_get(void) | |
167 | { | |
168 | if (colander_comp_cls) { | |
169 | goto end; | |
170 | } | |
171 | ||
172 | colander_comp_cls = bt_component_class_sink_create("colander", | |
173 | colander_consume); | |
174 | if (!colander_comp_cls) { | |
175 | BT_LOGE_STR("Cannot create sink colander component class."); | |
176 | goto end; | |
177 | } | |
178 | ||
179 | (void) bt_component_class_set_init_method(colander_comp_cls, | |
180 | colander_init); | |
181 | (void) bt_component_class_set_finalize_method(colander_comp_cls, | |
182 | colander_finalize); | |
183 | (void) bt_component_class_set_port_connected_method(colander_comp_cls, | |
184 | colander_port_connected); | |
185 | (void) bt_component_class_freeze(colander_comp_cls); | |
186 | ||
187 | end: | |
188 | return bt_get(colander_comp_cls); | |
189 | } | |
190 | ||
191 | __attribute__((destructor)) static | |
192 | void put_colander(void) { | |
193 | BT_PUT(colander_comp_cls); | |
194 | } |