| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com> |
| 5 | * Copyright 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #ifndef BABELTRACE_GRAPH_GRAPH_INTERNAL_H |
| 9 | #define BABELTRACE_GRAPH_GRAPH_INTERNAL_H |
| 10 | |
| 11 | /* Protection: this file uses BT_LIB_LOG*() macros directly */ |
| 12 | #ifndef BT_LIB_LOG_SUPPORTED |
| 13 | # error Please include "lib/logging.h" before including this file. |
| 14 | #endif |
| 15 | |
| 16 | #include <babeltrace2/graph/graph.h> |
| 17 | #include <babeltrace2/graph/message.h> |
| 18 | #include "common/macros.h" |
| 19 | #include "lib/object.h" |
| 20 | #include "lib/object-pool.h" |
| 21 | #include "common/assert.h" |
| 22 | #include "common/common.h" |
| 23 | #include <stdbool.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <glib.h> |
| 26 | |
| 27 | #include "component.h" |
| 28 | #include "component-sink.h" |
| 29 | #include "connection.h" |
| 30 | #include "lib/func-status.h" |
| 31 | |
| 32 | /* Protection: this file uses BT_LIB_LOG*() macros directly */ |
| 33 | #ifndef BT_LIB_LOG_SUPPORTED |
| 34 | # error Please include "lib/logging.h" before including this file. |
| 35 | #endif |
| 36 | |
| 37 | /* |
| 38 | * Protection: this file uses precondition and postcondition assertion |
| 39 | * macros directly. |
| 40 | */ |
| 41 | #ifndef BT_ASSERT_COND_SUPPORTED |
| 42 | # error Please include "lib/assert-cond.h" before including this file. |
| 43 | #endif |
| 44 | |
| 45 | struct bt_component; |
| 46 | struct bt_port; |
| 47 | |
| 48 | enum bt_graph_configuration_state { |
| 49 | BT_GRAPH_CONFIGURATION_STATE_CONFIGURING, |
| 50 | BT_GRAPH_CONFIGURATION_STATE_PARTIALLY_CONFIGURED, |
| 51 | BT_GRAPH_CONFIGURATION_STATE_CONFIGURED, |
| 52 | BT_GRAPH_CONFIGURATION_STATE_FAULTY, |
| 53 | BT_GRAPH_CONFIGURATION_STATE_DESTROYING, |
| 54 | }; |
| 55 | |
| 56 | struct bt_graph { |
| 57 | /** |
| 58 | * A component graph contains components and point-to-point connection |
| 59 | * between these components. |
| 60 | * |
| 61 | * In terms of ownership: |
| 62 | * 1) The graph is the components' parent, |
| 63 | * 2) The graph is the connnections' parent, |
| 64 | * 3) Components share the ownership of their connections, |
| 65 | * 4) A connection holds weak references to its two component endpoints. |
| 66 | */ |
| 67 | struct bt_object base; |
| 68 | |
| 69 | /* Array of pointers to bt_connection. */ |
| 70 | GPtrArray *connections; |
| 71 | /* Array of pointers to bt_component. */ |
| 72 | GPtrArray *components; |
| 73 | /* Queue of pointers (weak references) to sink bt_components. */ |
| 74 | GQueue *sinks_to_consume; |
| 75 | |
| 76 | uint64_t mip_version; |
| 77 | |
| 78 | /* |
| 79 | * Array of `struct bt_interrupter *`, each one owned by this. |
| 80 | * If any interrupter is set, then this graph is deemed |
| 81 | * interrupted. |
| 82 | */ |
| 83 | GPtrArray *interrupters; |
| 84 | |
| 85 | /* |
| 86 | * Default interrupter, owned by this. |
| 87 | */ |
| 88 | struct bt_interrupter *default_interrupter; |
| 89 | |
| 90 | bool has_sink; |
| 91 | |
| 92 | /* |
| 93 | * If this is false, then the public API's consuming |
| 94 | * functions (bt_graph_consume() and bt_graph_run()) return |
| 95 | * BT_FUNC_STATUS_CANNOT_CONSUME. The internal "no check" |
| 96 | * functions always work. |
| 97 | * |
| 98 | * In bt_port_output_message_iterator_create(), on success, |
| 99 | * this flag is cleared so that the iterator remains the only |
| 100 | * consumer for the graph's lifetime. |
| 101 | */ |
| 102 | bool can_consume; |
| 103 | |
| 104 | enum bt_graph_configuration_state config_state; |
| 105 | |
| 106 | struct { |
| 107 | GArray *source_output_port_added; |
| 108 | GArray *filter_output_port_added; |
| 109 | GArray *filter_input_port_added; |
| 110 | GArray *sink_input_port_added; |
| 111 | } listeners; |
| 112 | |
| 113 | /* Pool of `struct bt_message_event *` */ |
| 114 | struct bt_object_pool event_msg_pool; |
| 115 | |
| 116 | /* Pool of `struct bt_message_packet_beginning *` */ |
| 117 | struct bt_object_pool packet_begin_msg_pool; |
| 118 | |
| 119 | /* Pool of `struct bt_message_packet_end *` */ |
| 120 | struct bt_object_pool packet_end_msg_pool; |
| 121 | |
| 122 | /* |
| 123 | * Array of `struct bt_message *` (weak). |
| 124 | * |
| 125 | * This is an array of all the messages ever created from |
| 126 | * this graph. Some of them can be in one of the pools above, |
| 127 | * some of them can be at large. Because each message has a |
| 128 | * weak pointer to the graph containing its pool, we need to |
| 129 | * notify each message that the graph is gone on graph |
| 130 | * destruction. |
| 131 | * |
| 132 | * TODO: When we support a maximum size for object pools, |
| 133 | * add a way for a message to remove itself from this |
| 134 | * array (on destruction). |
| 135 | */ |
| 136 | GPtrArray *messages; |
| 137 | }; |
| 138 | |
| 139 | static inline |
| 140 | void bt_graph_set_can_consume(struct bt_graph *graph, bool can_consume) |
| 141 | { |
| 142 | BT_ASSERT_DBG(graph); |
| 143 | graph->can_consume = can_consume; |
| 144 | } |
| 145 | |
| 146 | BT_HIDDEN |
| 147 | int bt_graph_consume_sink_no_check(struct bt_graph *graph, |
| 148 | struct bt_component_sink *sink); |
| 149 | |
| 150 | BT_HIDDEN |
| 151 | enum bt_graph_listener_func_status bt_graph_notify_port_added(struct bt_graph *graph, |
| 152 | struct bt_port *port); |
| 153 | |
| 154 | BT_HIDDEN |
| 155 | void bt_graph_remove_connection(struct bt_graph *graph, |
| 156 | struct bt_connection *connection); |
| 157 | |
| 158 | BT_HIDDEN |
| 159 | void bt_graph_add_message(struct bt_graph *graph, |
| 160 | struct bt_message *msg); |
| 161 | |
| 162 | BT_HIDDEN |
| 163 | bool bt_graph_is_interrupted(const struct bt_graph *graph); |
| 164 | |
| 165 | static inline |
| 166 | const char *bt_graph_configuration_state_string( |
| 167 | enum bt_graph_configuration_state state) |
| 168 | { |
| 169 | switch (state) { |
| 170 | case BT_GRAPH_CONFIGURATION_STATE_CONFIGURING: |
| 171 | return "CONFIGURING"; |
| 172 | case BT_GRAPH_CONFIGURATION_STATE_PARTIALLY_CONFIGURED: |
| 173 | return "PARTIALLY_CONFIGURED"; |
| 174 | case BT_GRAPH_CONFIGURATION_STATE_CONFIGURED: |
| 175 | return "CONFIGURED"; |
| 176 | case BT_GRAPH_CONFIGURATION_STATE_FAULTY: |
| 177 | return "FAULTY"; |
| 178 | case BT_GRAPH_CONFIGURATION_STATE_DESTROYING: |
| 179 | return "DESTROYING"; |
| 180 | default: |
| 181 | return "(unknown)"; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | static inline |
| 186 | int bt_graph_configure(struct bt_graph *graph) |
| 187 | { |
| 188 | int status = BT_FUNC_STATUS_OK; |
| 189 | uint64_t i; |
| 190 | |
| 191 | BT_ASSERT_DBG(graph->config_state != |
| 192 | BT_GRAPH_CONFIGURATION_STATE_FAULTY); |
| 193 | |
| 194 | if (G_LIKELY(graph->config_state == |
| 195 | BT_GRAPH_CONFIGURATION_STATE_CONFIGURED)) { |
| 196 | goto end; |
| 197 | } |
| 198 | |
| 199 | BT_ASSERT_PRE(graph->has_sink, "Graph has no sink component: %!+g", graph); |
| 200 | graph->config_state = BT_GRAPH_CONFIGURATION_STATE_PARTIALLY_CONFIGURED; |
| 201 | |
| 202 | for (i = 0; i < graph->components->len; i++) { |
| 203 | struct bt_component *comp = graph->components->pdata[i]; |
| 204 | struct bt_component_sink *comp_sink = (void *) comp; |
| 205 | struct bt_component_class_sink *comp_cls_sink = |
| 206 | (void *) comp->class; |
| 207 | |
| 208 | if (comp->class->type != BT_COMPONENT_CLASS_TYPE_SINK) { |
| 209 | continue; |
| 210 | } |
| 211 | |
| 212 | if (comp_sink->graph_is_configured_method_called) { |
| 213 | continue; |
| 214 | } |
| 215 | |
| 216 | if (comp_cls_sink->methods.graph_is_configured) { |
| 217 | enum bt_component_class_sink_graph_is_configured_method_status comp_status; |
| 218 | |
| 219 | BT_LIB_LOGD("Calling user's \"graph is configured\" method: " |
| 220 | "%![graph-]+g, %![comp-]+c", |
| 221 | graph, comp); |
| 222 | comp_status = comp_cls_sink->methods.graph_is_configured( |
| 223 | (void *) comp_sink); |
| 224 | BT_LIB_LOGD("User method returned: status=%s", |
| 225 | bt_common_func_status_string(comp_status)); |
| 226 | BT_ASSERT_POST(comp_status == BT_FUNC_STATUS_OK || |
| 227 | comp_status == BT_FUNC_STATUS_ERROR || |
| 228 | comp_status == BT_FUNC_STATUS_MEMORY_ERROR, |
| 229 | "Unexpected returned status: status=%s", |
| 230 | bt_common_func_status_string(comp_status)); |
| 231 | BT_ASSERT_POST_NO_ERROR_IF_NO_ERROR_STATUS(comp_status); |
| 232 | if (comp_status != BT_FUNC_STATUS_OK) { |
| 233 | if (comp_status < 0) { |
| 234 | BT_LIB_LOGW_APPEND_CAUSE( |
| 235 | "Component's \"graph is configured\" method failed: " |
| 236 | "%![comp-]+c, status=%s", |
| 237 | comp, |
| 238 | bt_common_func_status_string( |
| 239 | comp_status)); |
| 240 | } |
| 241 | |
| 242 | status = comp_status; |
| 243 | goto end; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | comp_sink->graph_is_configured_method_called = true; |
| 248 | } |
| 249 | |
| 250 | graph->config_state = BT_GRAPH_CONFIGURATION_STATE_CONFIGURED; |
| 251 | |
| 252 | end: |
| 253 | return status; |
| 254 | } |
| 255 | |
| 256 | static inline |
| 257 | void bt_graph_make_faulty(struct bt_graph *graph) |
| 258 | { |
| 259 | graph->config_state = BT_GRAPH_CONFIGURATION_STATE_FAULTY; |
| 260 | BT_LIB_LOGI("Set graph's state to faulty: %![graph-]+g", graph); |
| 261 | } |
| 262 | |
| 263 | #endif /* BABELTRACE_GRAPH_GRAPH_INTERNAL_H */ |