bt2: add bt2.get_{greatest_operative,maximal}_mip_version()
[babeltrace.git] / src / lib / graph / graph.h
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1#ifndef BABELTRACE_GRAPH_GRAPH_INTERNAL_H
2#define BABELTRACE_GRAPH_GRAPH_INTERNAL_H
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3
4/*
f2b0325d 5 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
f60c8b34 6 * Copyright 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
c0418dd9 7 *
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8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 */
26
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27/* Protection: this file uses BT_LIB_LOG*() macros directly */
28#ifndef BT_LIB_LOG_SUPPORTED
29# error Please include "lib/logging.h" before including this file.
30#endif
31
71c5da58 32#include <babeltrace2/graph/graph.h>
71c5da58 33#include <babeltrace2/graph/message-const.h>
85e7137b 34#include "common/macros.h"
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35#include "lib/object.h"
36#include "lib/object-pool.h"
37#include "common/assert.h"
cde51176 38#include "common/common.h"
a256a42d 39#include <stdlib.h>
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40#include <glib.h>
41
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42#include "component.h"
43#include "component-sink.h"
44#include "connection.h"
fb25b9e3 45#include "lib/func-status.h"
57952005 46
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47/* Protection: this file uses BT_LIB_LOG*() macros directly */
48#ifndef BT_LIB_LOG_SUPPORTED
49# error Please include "lib/logging.h" before including this file.
50#endif
51
52/* Protection: this file uses BT_ASSERT_PRE*() macros directly */
53#ifndef BT_ASSERT_PRE_SUPPORTED
54# error Please include "lib/assert-pre.h" before including this file.
55#endif
56
57/* Protection: this file uses BT_ASSERT_POST*() macros directly */
58#ifndef BT_ASSERT_POST_SUPPORTED
59# error Please include "lib/assert-post.h" before including this file.
60#endif
61
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62struct bt_component;
63struct bt_port;
64
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65enum bt_graph_configuration_state {
66 BT_GRAPH_CONFIGURATION_STATE_CONFIGURING,
67 BT_GRAPH_CONFIGURATION_STATE_PARTIALLY_CONFIGURED,
68 BT_GRAPH_CONFIGURATION_STATE_CONFIGURED,
9a84962b 69 BT_GRAPH_CONFIGURATION_STATE_FAULTY,
d73bb381 70 BT_GRAPH_CONFIGURATION_STATE_DESTROYING,
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71};
72
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73struct bt_graph {
74 /**
75 * A component graph contains components and point-to-point connection
76 * between these components.
c0418dd9 77 *
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78 * In terms of ownership:
79 * 1) The graph is the components' parent,
80 * 2) The graph is the connnections' parent,
81 * 3) Components share the ownership of their connections,
82 * 4) A connection holds weak references to its two component endpoints.
c0418dd9 83 */
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84 struct bt_object base;
85
86 /* Array of pointers to bt_connection. */
87 GPtrArray *connections;
88 /* Array of pointers to bt_component. */
89 GPtrArray *components;
90 /* Queue of pointers (weak references) to sink bt_components. */
91 GQueue *sinks_to_consume;
1bf957a0 92
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93 /*
94 * Array of `struct bt_interrupter *`, each one owned by this.
95 * If any interrupter is set, then this graph is deemed
96 * interrupted.
97 */
98 GPtrArray *interrupters;
99
100 /*
101 * Default interrupter to support bt_graph_interrupt(); owned
102 * by this.
103 */
104 struct bt_interrupter *default_interrupter;
105
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106 bool in_remove_listener;
107 bool has_sink;
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108
109 /*
834e9996 110 * If this is false, then the public API's consuming
c3ac0193 111 * functions (bt_graph_consume() and bt_graph_run()) return
fb25b9e3 112 * BT_FUNC_STATUS_CANNOT_CONSUME. The internal "no check"
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113 * functions always work.
114 *
b09a5592 115 * In bt_port_output_message_iterator_create(), on success,
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116 * this flag is cleared so that the iterator remains the only
117 * consumer for the graph's lifetime.
118 */
834e9996 119 bool can_consume;
202a3a13 120
1043fdea 121 enum bt_graph_configuration_state config_state;
9cce94e4 122
1bf957a0 123 struct {
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124 GArray *source_output_port_added;
125 GArray *filter_output_port_added;
126 GArray *filter_input_port_added;
127 GArray *sink_input_port_added;
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128 GArray *source_filter_ports_connected;
129 GArray *source_sink_ports_connected;
ee976410 130 GArray *filter_filter_ports_connected;
834e9996 131 GArray *filter_sink_ports_connected;
1bf957a0 132 } listeners;
f7c3ac09 133
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134 /* Pool of `struct bt_message_event *` */
135 struct bt_object_pool event_msg_pool;
f7c3ac09 136
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137 /* Pool of `struct bt_message_packet_beginning *` */
138 struct bt_object_pool packet_begin_msg_pool;
f7c3ac09 139
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140 /* Pool of `struct bt_message_packet_end *` */
141 struct bt_object_pool packet_end_msg_pool;
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142
143 /*
b09a5592 144 * Array of `struct bt_message *` (weak).
f7c3ac09 145 *
b09a5592 146 * This is an array of all the messages ever created from
f7c3ac09 147 * this graph. Some of them can be in one of the pools above,
b09a5592 148 * some of them can be at large. Because each message has a
f7c3ac09 149 * weak pointer to the graph containing its pool, we need to
b09a5592 150 * notify each message that the graph is gone on graph
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151 * destruction.
152 *
153 * TODO: When we support a maximum size for object pools,
b09a5592 154 * add a way for a message to remove itself from this
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155 * array (on destruction).
156 */
b09a5592 157 GPtrArray *messages;
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158};
159
c3ac0193 160static inline
fa6cfec3 161void bt_graph_set_can_consume(struct bt_graph *graph, bool can_consume)
c3ac0193 162{
8b45963b 163 BT_ASSERT(graph);
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164 graph->can_consume = can_consume;
165}
166
c3ac0193 167BT_HIDDEN
fb25b9e3 168int bt_graph_consume_sink_no_check(struct bt_graph *graph,
834e9996 169 struct bt_component_sink *sink);
c3ac0193 170
1bf957a0 171BT_HIDDEN
fb25b9e3 172enum bt_graph_listener_func_status bt_graph_notify_port_added(struct bt_graph *graph,
e18f3e2b 173 struct bt_port *port);
1bf957a0 174
1bf957a0 175BT_HIDDEN
fb25b9e3 176enum bt_graph_listener_func_status bt_graph_notify_ports_connected(
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177 struct bt_graph *graph, struct bt_port *upstream_port,
178 struct bt_port *downstream_port);
1bf957a0 179
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180BT_HIDDEN
181void bt_graph_remove_connection(struct bt_graph *graph,
182 struct bt_connection *connection);
183
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184/*
185 * This only works with a component which is not connected at this
186 * point.
187 *
188 * Also the reference count of `component` should be 0 when you call
189 * this function, which means only `graph` owns the component, so it
190 * is safe to destroy.
191 */
192BT_HIDDEN
193int bt_graph_remove_unconnected_component(struct bt_graph *graph,
194 struct bt_component *component);
195
f7c3ac09 196BT_HIDDEN
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197void bt_graph_add_message(struct bt_graph *graph,
198 struct bt_message *msg);
f7c3ac09 199
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200BT_HIDDEN
201bool bt_graph_is_interrupted(const struct bt_graph *graph);
202
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203static inline
204const char *bt_graph_configuration_state_string(
205 enum bt_graph_configuration_state state)
206{
207 switch (state) {
208 case BT_GRAPH_CONFIGURATION_STATE_CONFIGURING:
e05f8464 209 return "CONFIGURING";
1043fdea 210 case BT_GRAPH_CONFIGURATION_STATE_PARTIALLY_CONFIGURED:
e05f8464 211 return "PARTIALLY_CONFIGURED";
1043fdea 212 case BT_GRAPH_CONFIGURATION_STATE_CONFIGURED:
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213 return "CONFIGURED";
214 case BT_GRAPH_CONFIGURATION_STATE_FAULTY:
215 return "FAULTY";
216 case BT_GRAPH_CONFIGURATION_STATE_DESTROYING:
217 return "DESTROYING";
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218 default:
219 return "(unknown)";
220 }
221}
222
223static inline
fb25b9e3 224int bt_graph_configure(struct bt_graph *graph)
1043fdea 225{
fb25b9e3 226 int status = BT_FUNC_STATUS_OK;
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227 uint64_t i;
228
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229 BT_ASSERT(graph->config_state != BT_GRAPH_CONFIGURATION_STATE_FAULTY);
230
85e7137b 231 if (G_LIKELY(graph->config_state ==
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232 BT_GRAPH_CONFIGURATION_STATE_CONFIGURED)) {
233 goto end;
234 }
235
28273afc 236 BT_ASSERT_PRE(graph->has_sink, "Graph has no sink component: %!+g", graph);
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237 graph->config_state = BT_GRAPH_CONFIGURATION_STATE_PARTIALLY_CONFIGURED;
238
239 for (i = 0; i < graph->components->len; i++) {
240 struct bt_component *comp = graph->components->pdata[i];
241 struct bt_component_sink *comp_sink = (void *) comp;
242 struct bt_component_class_sink *comp_cls_sink =
243 (void *) comp->class;
244
245 if (comp->class->type != BT_COMPONENT_CLASS_TYPE_SINK) {
246 continue;
247 }
248
249 if (comp_sink->graph_is_configured_method_called) {
250 continue;
251 }
252
253 if (comp_cls_sink->methods.graph_is_configured) {
fb25b9e3 254 enum bt_component_class_sink_graph_is_configured_method_status comp_status;
1043fdea 255
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256 BT_LIB_LOGD("Calling user's \"graph is configured\" method: "
257 "%![graph-]+g, %![comp-]+c",
258 graph, comp);
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259 comp_status = comp_cls_sink->methods.graph_is_configured(
260 (void *) comp_sink);
1043fdea 261 BT_LIB_LOGD("User method returned: status=%s",
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PP
262 bt_common_func_status_string(comp_status));
263 BT_ASSERT_POST(comp_status == BT_FUNC_STATUS_OK ||
264 comp_status == BT_FUNC_STATUS_ERROR ||
265 comp_status == BT_FUNC_STATUS_MEMORY_ERROR,
1043fdea 266 "Unexpected returned status: status=%s",
fb25b9e3 267 bt_common_func_status_string(comp_status));
fb25b9e3 268 if (comp_status != BT_FUNC_STATUS_OK) {
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PP
269 if (comp_status < 0) {
270 BT_LIB_LOGW_APPEND_CAUSE(
271 "Component's \"graph is configured\" method failed: "
272 "%![comp-]+c, status=%s",
273 comp,
274 bt_common_func_status_string(
275 comp_status));
276 }
277
278 status = comp_status;
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279 goto end;
280 }
281 }
282
283 comp_sink->graph_is_configured_method_called = true;
284 }
285
286 graph->config_state = BT_GRAPH_CONFIGURATION_STATE_CONFIGURED;
287
288end:
289 return status;
290}
291
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292static inline
293void bt_graph_make_faulty(struct bt_graph *graph)
294{
295 graph->config_state = BT_GRAPH_CONFIGURATION_STATE_FAULTY;
a684a357 296 BT_LIB_LOGI("Set graph's state to faulty: %![graph-]+g", graph);
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SM
297}
298
abe30a8f 299#endif /* BABELTRACE_GRAPH_GRAPH_INTERNAL_H */
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