Refuse to add port to component when parent graph is canceled
[babeltrace.git] / plugins / utils / dummy / dummy.c
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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#include <babeltrace/plugin/plugin-dev.h>
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24#include <babeltrace/graph/component.h>
25#include <babeltrace/graph/private-component.h>
b9d103be 26#include <babeltrace/graph/private-component-sink.h>
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27#include <babeltrace/graph/private-port.h>
28#include <babeltrace/graph/port.h>
29#include <babeltrace/graph/private-connection.h>
30#include <babeltrace/graph/component-sink.h>
31#include <babeltrace/graph/notification-iterator.h>
32#include <babeltrace/graph/notification.h>
0d8b4d8e 33#include <babeltrace/babeltrace-internal.h>
c2b71c92 34#include <plugins-common.h>
e0dfa761 35#include <assert.h>
c2b71c92
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36#include "dummy.h"
37
38static
39void destroy_private_dummy_data(struct dummy *dummy)
40{
41 if (dummy->iterators) {
42 g_ptr_array_free(dummy->iterators, TRUE);
43 }
44 g_free(dummy);
45}
46
64cadc66 47void dummy_finalize(struct bt_private_component *component)
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48{
49 struct dummy *dummy;
50
51 assert(component);
890882ef 52 dummy = bt_private_component_get_user_data(component);
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53 assert(dummy);
54 destroy_private_dummy_data(dummy);
55}
56
890882ef 57enum bt_component_status dummy_init(struct bt_private_component *component,
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58 struct bt_value *params, UNUSED_VAR void *init_method_data)
59{
60 enum bt_component_status ret;
61 struct dummy *dummy = g_new0(struct dummy, 1);
62
63 if (!dummy) {
64 ret = BT_COMPONENT_STATUS_NOMEM;
65 goto end;
66 }
67
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68 ret = bt_private_component_sink_add_input_private_port(component,
69 "in", NULL, NULL);
70 if (ret != BT_COMPONENT_STATUS_OK) {
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71 goto end;
72 }
73
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74 dummy->iterators = g_ptr_array_new_with_free_func(
75 (GDestroyNotify) bt_put);
76 if (!dummy->iterators) {
77 ret = BT_COMPONENT_STATUS_NOMEM;
78 goto end;
79 }
80
890882ef 81 ret = bt_private_component_set_user_data(component, dummy);
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82 if (ret != BT_COMPONENT_STATUS_OK) {
83 goto error;
84 }
85end:
86 return ret;
87error:
88 destroy_private_dummy_data(dummy);
89 return ret;
90}
91
0d8b4d8e 92void dummy_port_connected(
890882ef 93 struct bt_private_component *component,
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94 struct bt_private_port *self_port,
95 struct bt_port *other_port)
c2b71c92 96{
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97 struct dummy *dummy;
98 struct bt_notification_iterator *iterator;
890882ef 99 struct bt_private_connection *connection;
c2b71c92 100
890882ef 101 dummy = bt_private_component_get_user_data(component);
c2b71c92 102 assert(dummy);
890882ef 103 connection = bt_private_port_get_private_connection(self_port);
72b913fb 104 assert(connection);
890882ef 105 iterator = bt_private_connection_create_notification_iterator(
fa054faf 106 connection, NULL);
c2b71c92 107 if (!iterator) {
0d8b4d8e 108 dummy->error = true;
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109 goto end;
110 }
111
112 g_ptr_array_add(dummy->iterators, iterator);
0d8b4d8e 113
c2b71c92 114end:
72b913fb 115 bt_put(connection);
c2b71c92 116}
e0dfa761 117
890882ef 118enum bt_component_status dummy_consume(struct bt_private_component *component)
e0dfa761 119{
8812600c 120 enum bt_component_status ret = BT_COMPONENT_STATUS_OK;
e0dfa761 121 struct bt_notification *notif = NULL;
e0dfa761 122 size_t i;
c2b71c92 123 struct dummy *dummy;
e0dfa761 124
890882ef 125 dummy = bt_private_component_get_user_data(component);
c2b71c92 126 assert(dummy);
e0dfa761 127
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128 if (unlikely(dummy->error)) {
129 ret = BT_COMPONENT_STATUS_ERROR;
130 goto end;
131 }
132
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133 /* Consume one notification from each iterator. */
134 for (i = 0; i < dummy->iterators->len; i++) {
135 struct bt_notification_iterator *it;
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136 enum bt_notification_iterator_status it_ret;
137
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138 it = g_ptr_array_index(dummy->iterators, i);
139
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140 it_ret = bt_notification_iterator_next(it);
141 switch (it_ret) {
142 case BT_NOTIFICATION_ITERATOR_STATUS_ERROR:
143 ret = BT_COMPONENT_STATUS_ERROR;
144 goto end;
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145 case BT_NOTIFICATION_ITERATOR_STATUS_AGAIN:
146 ret = BT_COMPONENT_STATUS_AGAIN;
147 goto end;
e0dfa761 148 case BT_NOTIFICATION_ITERATOR_STATUS_END:
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149 g_ptr_array_remove_index(dummy->iterators, i);
150 i--;
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151 continue;
152 default:
153 break;
154 }
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155 }
156
c2b71c92 157 if (dummy->iterators->len == 0) {
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158 ret = BT_COMPONENT_STATUS_END;
159 }
e0dfa761 160end:
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161 bt_put(notif);
162 return ret;
163}
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