include/babeltrace/trace-ir/field-class-internal.h

   1 #ifndef BABELTRACE_TRACE_IR_FIELD_CLASSES_INTERNAL_H
   2 #define BABELTRACE_TRACE_IR_FIELD_CLASSES_INTERNAL_H
   3
   4 /*
   5  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   6  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   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
  27 #include <babeltrace/assert-pre-internal.h>
  28 #include <babeltrace/trace-ir/clock-class.h>
  29 #include <babeltrace/trace-ir/field-class.h>
  30 #include <babeltrace/babeltrace-internal.h>
  31 #include <babeltrace/object-internal.h>
  32 #include <babeltrace/types.h>
  33 #include <stdint.h>
  34 #include <glib.h>
  35
  36 #define BT_ASSERT_PRE_FC_IS_INT(_fc, _name)                             \
  37         BT_ASSERT_PRE(                                                  \
  38                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER || \
  39                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_SIGNED_INTEGER || \
  40                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION || \
  41                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION, \
  42                 _name " is not an integer field class: %![fc-]+F", (_fc))
  43
  44 #define BT_ASSERT_PRE_FC_IS_UNSIGNED_INT(_fc, _name)                    \
  45         BT_ASSERT_PRE(                                                  \
  46                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER || \
  47                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION, \
  48                 _name " is not an unsigned integer field class: %![fc-]+F", (_fc))
  49
  50 #define BT_ASSERT_PRE_FC_IS_ENUM(_fc, _name)                            \
  51         BT_ASSERT_PRE(                                                  \
  52                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION || \
  53                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION, \
  54                 _name " is not an enumeration field class: %![fc-]+F", (_fc))
  55
  56 #define BT_ASSERT_PRE_FC_IS_ARRAY(_fc, _name)                           \
  57         BT_ASSERT_PRE(                                                  \
  58                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_STATIC_ARRAY || \
  59                 ((const struct bt_field_class *) (_fc))->type == BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY, \
  60                 _name " is not an array field class: %![fc-]+F", (_fc))
  61
  62 #define BT_ASSERT_PRE_FC_HAS_ID(_fc, _type, _name)                      \
  63         BT_ASSERT_PRE(((const struct bt_field_class *) (_fc))->type == (_type),         \
  64                 _name " has the wrong type: expected-type=%s, "         \
  65                 "%![fc-]+F", bt_common_field_class_type_string(_type), (_fc))
  66
  67 #define BT_ASSERT_PRE_FC_HOT(_fc, _name)                                \
  68         BT_ASSERT_PRE_HOT((const struct bt_field_class *) (_fc),                \
  69                 (_name), ": %!+F", (_fc))
  70
  71 #define BT_FIELD_CLASS_NAMED_FC_AT_INDEX(_fc, _index)           \
  72         (&g_array_index(((struct bt_field_class_named_field_class_container *) (_fc))->named_fcs, \
  73                 struct bt_named_field_class, (_index)))
  74
  75 #define BT_FIELD_CLASS_ENUM_MAPPING_AT_INDEX(_fc, _index)               \
  76         (&g_array_index(((struct bt_field_class_enumeration *) (_fc))->mappings, \
  77                 struct bt_field_class_enumeration_mapping, (_index)))
  78
  79 #define BT_FIELD_CLASS_ENUM_MAPPING_RANGE_AT_INDEX(_mapping, _index)    \
  80         (&g_array_index((_mapping)->ranges,                             \
  81                 struct bt_field_class_enumeration_mapping_range, (_index)))
  82
  83 struct bt_field;
  84 struct bt_field_class;
  85
  86 struct bt_field_class {
  87         struct bt_object base;
  88         enum bt_field_class_type type;
  89         bool frozen;
  90
  91         /*
  92          * Only used in developer mode, this flag indicates whether or
  93          * not this field class is part of a trace class.
  94          */
  95         bool part_of_trace_class;
  96 };
  97
  98 struct bt_field_class_integer {
  99         struct bt_field_class common;
 100
 101         /*
 102          * Value range of fields built from this integer field class:
 103          * this is an equivalent integer size in bits. More formally,
 104          * `range` is `n` in:
 105          *
 106          * Unsigned range: [0, 2^n - 1]
 107          * Signed range: [-2^(n - 1), 2^(n - 1) - 1]
 108          */
 109         uint64_t range;
 110
 111         enum bt_field_class_integer_preferred_display_base base;
 112 };
 113
 114 struct bt_field_class_enumeration_mapping_range {
 115         union {
 116                 uint64_t u;
 117                 int64_t i;
 118         } lower;
 119
 120         union {
 121                 uint64_t u;
 122                 int64_t i;
 123         } upper;
 124 };
 125
 126 struct bt_field_class_enumeration_mapping {
 127         GString *label;
 128
 129         /* Array of `struct bt_field_class_enumeration_mapping_range` */
 130         GArray *ranges;
 131 };
 132
 133 struct bt_field_class_enumeration {
 134         struct bt_field_class_integer common;
 135
 136         /* Array of `struct bt_field_class_enumeration_mapping *` */
 137         GArray *mappings;
 138
 139         /*
 140          * This is an array of `const char *` which acts as a temporary
 141          * (potentially growing) buffer for
 142          * bt_field_class_unsigned_enumeration_get_mapping_labels_by_value()
 143          * and
 144          * bt_field_class_signed_enumeration_get_mapping_labels_by_value().
 145          *
 146          * The actual strings are owned by the mappings above.
 147          */
 148         GPtrArray *label_buf;
 149 };
 150
 151 struct bt_field_class_real {
 152         struct bt_field_class common;
 153         bool is_single_precision;
 154 };
 155
 156 struct bt_field_class_string {
 157         struct bt_field_class common;
 158 };
 159
 160 /* A named field class is a (name, field class) pair */
 161 struct bt_named_field_class {
 162         GString *name;
 163
 164         /* Owned by this */
 165         struct bt_field_class *fc;
 166 };
 167
 168 /*
 169  * This is the base field class for a container of named field classes.
 170  * Structure and variant field classes inherit this.
 171  */
 172 struct bt_field_class_named_field_class_container {
 173         struct bt_field_class common;
 174
 175         /*
 176          * Key: `const char *`, not owned by this (owned by named field
 177          * type objects contained in `named_fcs` below).
 178          */
 179         GHashTable *name_to_index;
 180
 181         /* Array of `struct bt_named_field_class` */
 182         GArray *named_fcs;
 183 };
 184
 185 struct bt_field_class_structure {
 186         struct bt_field_class_named_field_class_container common;
 187 };
 188
 189 struct bt_field_class_array {
 190         struct bt_field_class common;
 191
 192         /* Owned by this */
 193         struct bt_field_class *element_fc;
 194 };
 195
 196 struct bt_field_class_static_array {
 197         struct bt_field_class_array common;
 198         uint64_t length;
 199 };
 200
 201 struct bt_field_class_dynamic_array {
 202         struct bt_field_class_array common;
 203
 204         /* Weak: never dereferenced, only use to find it elsewhere */
 205         struct bt_field_class *length_fc;
 206
 207         /* Owned by this */
 208         struct bt_field_path *length_field_path;
 209 };
 210
 211 struct bt_field_class_variant {
 212         struct bt_field_class_named_field_class_container common;
 213
 214         /* Weak: never dereferenced, only use to find it elsewhere */
 215         struct bt_field_class *selector_fc;
 216
 217         /* Owned by this */
 218         struct bt_field_path *selector_field_path;
 219 };
 220
 221 static inline
 222 bool bt_field_class_has_known_type(const struct bt_field_class *fc)
 223 {
 224         return fc->type >= BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER &&
 225                 fc->type <= BT_FIELD_CLASS_TYPE_VARIANT;
 226 }
 227
 228 BT_HIDDEN
 229 void _bt_field_class_freeze(const struct bt_field_class *field_class);
 230
 231 #ifdef BT_DEV_MODE
 232 # define bt_field_class_freeze          _bt_field_class_freeze
 233 #else
 234 # define bt_field_class_freeze(_fc)
 235 #endif
 236
 237 /*
 238  * This function recursively marks `field_class` and its children as
 239  * being part of a trace. This is used to validate that all field classes
 240  * are used at a single location within trace objects even if they are
 241  * shared objects for other purposes.
 242  */
 243 BT_HIDDEN
 244 void _bt_field_class_make_part_of_trace_class(
 245                 const struct bt_field_class *field_class);
 246
 247 #ifdef BT_DEV_MODE
 248 # define bt_field_class_make_part_of_trace_class        _bt_field_class_make_part_of_trace_class
 249 #else
 250 # define bt_field_class_make_part_of_trace_class(_fc)   ((void) _fc)
 251 #endif
 252
 253 #endif /* BABELTRACE_TRACE_IR_FIELD_CLASSES_INTERNAL_H */