tests/lib/conds/utils.cpp

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0-only
   3  *
   4  * Copyright (C) 2020 Philippe Proulx <pproulx@efficios.com>
   5  */
   6
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <assert.h>
  11 #include <babeltrace2/babeltrace.h>
  12 #include <glib.h>
  13 #include <iostream>
  14
  15 #include "common/assert.h"
  16 #include "cpp-common/nlohmann/json.hpp"
  17 #include "utils.hpp"
  18
  19 typedef void (*run_in_comp_cls_init_func)(bt_self_component *self_comp, void *user_data);
  20
  21 struct comp_cls_init_method_data
  22 {
  23     run_in_comp_cls_init_func func;
  24     void *user_data;
  25 };
  26
  27 static bt_component_class_initialize_method_status
  28 comp_cls_init(bt_self_component_source *self_comp, bt_self_component_source_configuration *conf,
  29               const bt_value *params, void *init_method_data)
  30 {
  31     comp_cls_init_method_data *data = static_cast<comp_cls_init_method_data *>(init_method_data);
  32
  33     /* Call user function which is expected to abort */
  34     data->func(bt_self_component_source_as_self_component(self_comp), data->user_data);
  35
  36     /* Never reached! */
  37     return BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR;
  38 }
  39
  40 static bt_message_iterator_class_next_method_status
  41 msg_iter_cls_next(bt_self_message_iterator *self_msg_iter, bt_message_array_const msgs,
  42                   uint64_t capacity, uint64_t *count)
  43 {
  44     /* Not used */
  45     return BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR;
  46 }
  47
  48 static void run_in_comp_cls_init(run_in_comp_cls_init_func func, void *user_data)
  49 {
  50     bt_message_iterator_class *msg_iter_cls;
  51     bt_component_class_source *comp_cls;
  52     bt_component_class_set_method_status set_method_status;
  53     bt_graph *graph;
  54     struct comp_cls_init_method_data init_method_data = {
  55         .func = func,
  56         .user_data = user_data,
  57     };
  58
  59     /* Create component class */
  60     msg_iter_cls = bt_message_iterator_class_create(msg_iter_cls_next);
  61     BT_ASSERT(msg_iter_cls);
  62     comp_cls = bt_component_class_source_create("yo", msg_iter_cls);
  63     BT_ASSERT(comp_cls);
  64     set_method_status = bt_component_class_source_set_initialize_method(comp_cls, comp_cls_init);
  65     BT_ASSERT(set_method_status == BT_COMPONENT_CLASS_SET_METHOD_STATUS_OK);
  66
  67     /* Create graph */
  68     graph = bt_graph_create(0);
  69     BT_ASSERT(graph);
  70
  71     /*
  72          * Add source component: this calls the initialization method,
  73          * calling `func`.
  74          */
  75     (void) bt_graph_add_source_component_with_initialize_method_data(
  76         graph, comp_cls, "whatever", NULL, &init_method_data, BT_LOGGING_LEVEL_NONE, NULL);
  77
  78     /*
  79          * This point is not expected to be reached as func() is
  80          * expected to abort.
  81          */
  82 }
  83
  84 static void run_in_comp_cls_init_defer(bt_self_component *self_comp, void *user_data)
  85 {
  86     cond_trigger_run_in_comp_cls_init_func user_func =
  87         reinterpret_cast<cond_trigger_run_in_comp_cls_init_func>(user_data);
  88
  89     user_func(self_comp);
  90 }
  91
  92 static void run_trigger(const struct cond_trigger *trigger)
  93 {
  94     switch (trigger->func_type) {
  95     case COND_TRIGGER_FUNC_TYPE_BASIC:
  96         trigger->func.basic();
  97         break;
  98     case COND_TRIGGER_FUNC_TYPE_RUN_IN_COMP_CLS_INIT:
  99         run_in_comp_cls_init(run_in_comp_cls_init_defer,
 100                              reinterpret_cast<void *>(trigger->func.run_in_comp_cls_init));
 101         break;
 102     default:
 103         abort();
 104     }
 105 }
 106
 107 static void list_triggers(const struct cond_trigger triggers[], size_t trigger_count)
 108 {
 109     nlohmann::json trigger_array = nlohmann::json::array();
 110
 111     for (size_t i = 0; i < trigger_count; i++) {
 112         nlohmann::json trigger_obj = nlohmann::json::object();
 113         const cond_trigger& trigger = triggers[i];
 114
 115         /* Condition ID */
 116         trigger_obj["cond-id"] = trigger.cond_id;
 117
 118         /* Name starts with condition ID */
 119         std::string name = trigger.cond_id;
 120
 121         if (trigger.suffix) {
 122             name += '-';
 123             name += trigger.suffix;
 124         }
 125
 126         trigger_obj["name"] = std::move(name);
 127         trigger_array.push_back(std::move(trigger_obj));
 128     }
 129
 130     auto str = trigger_array.dump();
 131     std::cout << str;
 132     std::flush(std::cout);
 133 }
 134
 135 void cond_main(int argc, const char *argv[], const struct cond_trigger triggers[],
 136                size_t trigger_count)
 137 {
 138     BT_ASSERT(argc >= 2);
 139
 140     if (strcmp(argv[1], "list") == 0) {
 141         list_triggers(triggers, trigger_count);
 142     } else if (strcmp(argv[1], "run") == 0) {
 143         int index;
 144
 145         BT_ASSERT(argc >= 3);
 146         index = atoi(argv[2]);
 147         BT_ASSERT(index >= 0 && index < trigger_count);
 148         run_trigger(&triggers[index]);
 149     }
 150 }