| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright 2017-2019 Philippe Proulx <pproulx@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #define BT_LOG_TAG "LIB/COMPONENT-CLASS-SINK-SIMPLE" |
| 8 | #include "lib/logging.h" |
| 9 | |
| 10 | #include "common/assert.h" |
| 11 | #include "common/common.h" |
| 12 | #include "lib/assert-cond.h" |
| 13 | #include "lib/object.h" |
| 14 | #include <babeltrace2/graph/component-class.h> |
| 15 | #include <babeltrace2/graph/self-component-port.h> |
| 16 | #include <babeltrace2/graph/self-component.h> |
| 17 | #include <babeltrace2/graph/message-iterator.h> |
| 18 | #include <glib.h> |
| 19 | |
| 20 | #include "component-class-sink-simple.h" |
| 21 | #include "lib/func-status.h" |
| 22 | |
| 23 | /* |
| 24 | * We keep a single simple sink component class reference. It's created |
| 25 | * the first time bt_component_class_sink_simple_borrow() is called and |
| 26 | * put by the put_simple_sink_component_class() library destructor. |
| 27 | */ |
| 28 | static |
| 29 | struct bt_component_class_sink *simple_comp_cls; |
| 30 | |
| 31 | struct simple_sink_data { |
| 32 | bt_message_iterator *msg_iter; |
| 33 | struct simple_sink_init_method_data init_method_data; |
| 34 | }; |
| 35 | |
| 36 | static |
| 37 | enum bt_component_class_initialize_method_status simple_sink_init( |
| 38 | bt_self_component_sink *self_comp, |
| 39 | bt_self_component_sink_configuration *config, |
| 40 | const struct bt_value *params, void *init_method_data) |
| 41 | { |
| 42 | int status = BT_FUNC_STATUS_OK; |
| 43 | struct simple_sink_data *data = NULL; |
| 44 | |
| 45 | data = g_new0(struct simple_sink_data, 1); |
| 46 | if (!data) { |
| 47 | BT_LIB_LOGE_APPEND_CAUSE( |
| 48 | "Failed to allocate simple sink component private data."); |
| 49 | status = BT_FUNC_STATUS_MEMORY_ERROR; |
| 50 | goto end; |
| 51 | } |
| 52 | |
| 53 | BT_ASSERT(init_method_data); |
| 54 | data->init_method_data = |
| 55 | *((struct simple_sink_init_method_data *) init_method_data); |
| 56 | |
| 57 | /* Add input port */ |
| 58 | status = bt_self_component_sink_add_input_port(self_comp, "in", |
| 59 | NULL, NULL); |
| 60 | if (status != BT_FUNC_STATUS_OK) { |
| 61 | BT_LIB_LOGE_APPEND_CAUSE( |
| 62 | "Cannot add input port to simple sink component."); |
| 63 | goto end; |
| 64 | } |
| 65 | |
| 66 | bt_self_component_set_data( |
| 67 | bt_self_component_sink_as_self_component(self_comp), data); |
| 68 | |
| 69 | end: |
| 70 | return status; |
| 71 | } |
| 72 | |
| 73 | static |
| 74 | void simple_sink_finalize(struct bt_self_component_sink *self_comp) |
| 75 | { |
| 76 | struct simple_sink_data *data = bt_self_component_get_data( |
| 77 | bt_self_component_sink_as_self_component(self_comp)); |
| 78 | |
| 79 | if (data) { |
| 80 | if (data->init_method_data.finalize_func) { |
| 81 | /* Call user's finalization function */ |
| 82 | data->init_method_data.finalize_func( |
| 83 | data->init_method_data.user_data); |
| 84 | } |
| 85 | |
| 86 | BT_OBJECT_PUT_REF_AND_RESET(data->msg_iter); |
| 87 | g_free(data); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | static |
| 92 | enum bt_component_class_sink_graph_is_configured_method_status |
| 93 | simple_sink_graph_is_configured( |
| 94 | bt_self_component_sink *self_comp) |
| 95 | { |
| 96 | bt_component_class_sink_graph_is_configured_method_status status; |
| 97 | bt_message_iterator_create_from_sink_component_status |
| 98 | msg_iter_status; |
| 99 | struct simple_sink_data *data = bt_self_component_get_data( |
| 100 | bt_self_component_sink_as_self_component(self_comp)); |
| 101 | |
| 102 | struct bt_self_component_port_input *self_port = |
| 103 | bt_self_component_sink_borrow_input_port_by_name(self_comp, |
| 104 | "in"); |
| 105 | |
| 106 | if (!bt_port_is_connected(bt_self_component_port_as_port( |
| 107 | bt_self_component_port_input_as_self_component_port(self_port)))) { |
| 108 | BT_LIB_LOGE_APPEND_CAUSE( |
| 109 | "Simple sink component's input port is not connected: " |
| 110 | "%![comp-]+c, %![port-]+p", self_comp, self_port); |
| 111 | status = BT_COMPONENT_CLASS_SINK_GRAPH_IS_CONFIGURED_METHOD_STATUS_ERROR; |
| 112 | goto end; |
| 113 | } |
| 114 | |
| 115 | BT_ASSERT(data); |
| 116 | msg_iter_status = bt_message_iterator_create_from_sink_component( |
| 117 | self_comp, self_port, &data->msg_iter); |
| 118 | if (msg_iter_status != BT_MESSAGE_ITERATOR_CREATE_FROM_SINK_COMPONENT_STATUS_OK) { |
| 119 | BT_LIB_LOGE_APPEND_CAUSE( |
| 120 | "Cannot create input port message iterator: " |
| 121 | "%![comp-]+c, %![port-]+p", self_comp, self_port); |
| 122 | status = (int) msg_iter_status; |
| 123 | goto end; |
| 124 | } |
| 125 | |
| 126 | if (data->init_method_data.init_func) { |
| 127 | bt_graph_simple_sink_component_initialize_func_status init_status; |
| 128 | |
| 129 | /* Call user's initialization function */ |
| 130 | init_status = data->init_method_data.init_func(data->msg_iter, |
| 131 | data->init_method_data.user_data); |
| 132 | if (init_status != BT_GRAPH_SIMPLE_SINK_COMPONENT_INITIALIZE_FUNC_STATUS_OK) { |
| 133 | BT_LIB_LOGW_APPEND_CAUSE( |
| 134 | "Simple sink component's user's initialization function failed: " |
| 135 | "status=%s, %![comp-]+c, %![port-]+p", |
| 136 | bt_common_func_status_string(init_status), |
| 137 | self_comp, self_port); |
| 138 | status = (int) init_status; |
| 139 | goto end; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | status = BT_COMPONENT_CLASS_SINK_GRAPH_IS_CONFIGURED_METHOD_STATUS_OK; |
| 144 | |
| 145 | end: |
| 146 | return status; |
| 147 | } |
| 148 | |
| 149 | static |
| 150 | enum bt_component_class_sink_consume_method_status simple_sink_consume( |
| 151 | struct bt_self_component_sink *self_comp) |
| 152 | { |
| 153 | int status; |
| 154 | struct simple_sink_data *data = bt_self_component_get_data( |
| 155 | bt_self_component_sink_as_self_component(self_comp)); |
| 156 | |
| 157 | BT_ASSERT_DBG(data); |
| 158 | BT_ASSERT_DBG(data->init_method_data.consume_func); |
| 159 | BT_ASSERT_DBG(data->msg_iter); |
| 160 | |
| 161 | /* Call user's "consume" function */ |
| 162 | status = data->init_method_data.consume_func(data->msg_iter, |
| 163 | data->init_method_data.user_data); |
| 164 | if (status < 0) { |
| 165 | BT_LIB_LOGW_APPEND_CAUSE( |
| 166 | "Simple sink component's user's \"consume\" function failed: " |
| 167 | "status=%s, %![comp-]+c", |
| 168 | bt_common_func_status_string(status), self_comp); |
| 169 | } |
| 170 | |
| 171 | return status; |
| 172 | } |
| 173 | |
| 174 | BT_HIDDEN |
| 175 | struct bt_component_class_sink *bt_component_class_sink_simple_borrow(void) |
| 176 | { |
| 177 | enum bt_component_class_set_method_status set_method_status; |
| 178 | |
| 179 | if (simple_comp_cls) { |
| 180 | goto end; |
| 181 | } |
| 182 | |
| 183 | simple_comp_cls = bt_component_class_sink_create("simple-sink", |
| 184 | simple_sink_consume); |
| 185 | if (!simple_comp_cls) { |
| 186 | BT_LIB_LOGE_APPEND_CAUSE( |
| 187 | "Cannot create simple sink component class."); |
| 188 | goto end; |
| 189 | } |
| 190 | |
| 191 | set_method_status = bt_component_class_sink_set_initialize_method( |
| 192 | simple_comp_cls, simple_sink_init); |
| 193 | BT_ASSERT(set_method_status == BT_FUNC_STATUS_OK); |
| 194 | set_method_status = bt_component_class_sink_set_finalize_method( |
| 195 | simple_comp_cls, simple_sink_finalize); |
| 196 | BT_ASSERT(set_method_status == BT_FUNC_STATUS_OK); |
| 197 | set_method_status = bt_component_class_sink_set_graph_is_configured_method( |
| 198 | simple_comp_cls, simple_sink_graph_is_configured); |
| 199 | BT_ASSERT(set_method_status == BT_FUNC_STATUS_OK); |
| 200 | |
| 201 | end: |
| 202 | return simple_comp_cls; |
| 203 | } |
| 204 | |
| 205 | __attribute__((destructor)) static |
| 206 | void put_simple_sink_component_class(void) { |
| 207 | BT_OBJECT_PUT_REF_AND_RESET(simple_comp_cls); |
| 208 | } |