+++ /dev/null
-/*
- * struct.c
- *
- * BabelTrace - Structure Type Converter
- *
- * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
- *
- * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <babeltrace/compiler.h>
-#include <babeltrace/format.h>
-#include <babeltrace/types.h>
-#include <errno.h>
-
-#ifndef max
-#define max(a, b) ((a) < (b) ? (b) : (a))
-#endif
-
-static
-struct bt_definition *_struct_definition_new(struct bt_declaration *declaration,
- struct definition_scope *parent_scope,
- GQuark field_name, int index,
- const char *root_name);
-static
-void _struct_definition_free(struct bt_definition *definition);
-
-int bt_struct_rw(struct bt_stream_pos *ppos, struct bt_definition *definition)
-{
- struct definition_struct *struct_definition =
- container_of(definition, struct definition_struct, p);
- unsigned long i;
- int ret;
-
- for (i = 0; i < struct_definition->fields->len; i++) {
- struct bt_definition *field =
- g_ptr_array_index(struct_definition->fields, i);
- ret = generic_rw(ppos, field);
- if (ret)
- return ret;
- }
- return 0;
-}
-
-static
-void _struct_declaration_free(struct bt_declaration *declaration)
-{
- struct declaration_struct *struct_declaration =
- container_of(declaration, struct declaration_struct, p);
- unsigned long i;
-
- bt_free_declaration_scope(struct_declaration->scope);
- g_hash_table_destroy(struct_declaration->fields_by_name);
-
- for (i = 0; i < struct_declaration->fields->len; i++) {
- struct declaration_field *declaration_field =
- &g_array_index(struct_declaration->fields,
- struct declaration_field, i);
- bt_declaration_unref(declaration_field->declaration);
- }
- g_array_free(struct_declaration->fields, true);
- g_free(struct_declaration);
-}
-
-struct declaration_struct *
- bt_struct_declaration_new(struct declaration_scope *parent_scope,
- uint64_t min_align)
-{
- struct declaration_struct *struct_declaration;
- struct bt_declaration *declaration;
-
- struct_declaration = g_new(struct declaration_struct, 1);
- declaration = &struct_declaration->p;
- struct_declaration->fields_by_name = g_hash_table_new(g_direct_hash,
- g_direct_equal);
- struct_declaration->fields = g_array_sized_new(FALSE, TRUE,
- sizeof(struct declaration_field),
- DEFAULT_NR_STRUCT_FIELDS);
- struct_declaration->scope = bt_new_declaration_scope(parent_scope);
- declaration->id = CTF_TYPE_STRUCT;
- declaration->alignment = max(1, min_align);
- declaration->declaration_free = _struct_declaration_free;
- declaration->definition_new = _struct_definition_new;
- declaration->definition_free = _struct_definition_free;
- declaration->ref = 1;
- return struct_declaration;
-}
-
-static
-struct bt_definition *
- _struct_definition_new(struct bt_declaration *declaration,
- struct definition_scope *parent_scope,
- GQuark field_name, int index,
- const char *root_name)
-{
- struct declaration_struct *struct_declaration =
- container_of(declaration, struct declaration_struct, p);
- struct definition_struct *_struct;
- int i;
- int ret;
-
- _struct = g_new(struct definition_struct, 1);
- bt_declaration_ref(&struct_declaration->p);
- _struct->p.declaration = declaration;
- _struct->declaration = struct_declaration;
- _struct->p.ref = 1;
- /*
- * Use INT_MAX order to ensure that all fields of the parent
- * scope are seen as being prior to this scope.
- */
- _struct->p.index = root_name ? INT_MAX : index;
- _struct->p.name = field_name;
- _struct->p.path = bt_new_definition_path(parent_scope, field_name, root_name);
- _struct->p.scope = bt_new_definition_scope(parent_scope, field_name, root_name);
-
- ret = bt_register_field_definition(field_name, &_struct->p,
- parent_scope);
- assert(!ret || ret == -EPERM);
-
- _struct->fields = g_ptr_array_sized_new(DEFAULT_NR_STRUCT_FIELDS);
- g_ptr_array_set_size(_struct->fields, struct_declaration->fields->len);
- for (i = 0; i < struct_declaration->fields->len; i++) {
- struct declaration_field *declaration_field =
- &g_array_index(struct_declaration->fields,
- struct declaration_field, i);
- struct bt_definition **field =
- (struct bt_definition **) &g_ptr_array_index(_struct->fields, i);
-
- *field = declaration_field->declaration->definition_new(declaration_field->declaration,
- _struct->p.scope,
- declaration_field->name, i, NULL);
- if (!*field)
- goto error;
- }
- return &_struct->p;
-
-error:
- for (i--; i >= 0; i--) {
- struct bt_definition *field = g_ptr_array_index(_struct->fields, i);
- bt_definition_unref(field);
- }
- bt_free_definition_scope(_struct->p.scope);
- bt_declaration_unref(&struct_declaration->p);
- g_free(_struct);
- return NULL;
-}
-
-static
-void _struct_definition_free(struct bt_definition *definition)
-{
- struct definition_struct *_struct =
- container_of(definition, struct definition_struct, p);
- unsigned long i;
-
- assert(_struct->fields->len == _struct->declaration->fields->len);
- for (i = 0; i < _struct->fields->len; i++) {
- struct bt_definition *field = g_ptr_array_index(_struct->fields, i);
- bt_definition_unref(field);
- }
- bt_free_definition_scope(_struct->p.scope);
- bt_declaration_unref(_struct->p.declaration);
- g_ptr_array_free(_struct->fields, TRUE);
- g_free(_struct);
-}
-
-void bt_struct_declaration_add_field(struct declaration_struct *struct_declaration,
- const char *field_name,
- struct bt_declaration *field_declaration)
-{
- struct declaration_field *field;
- unsigned long index;
-
- g_array_set_size(struct_declaration->fields, struct_declaration->fields->len + 1);
- index = struct_declaration->fields->len - 1; /* last field (new) */
- field = &g_array_index(struct_declaration->fields, struct declaration_field, index);
- field->name = g_quark_from_string(field_name);
- bt_declaration_ref(field_declaration);
- field->declaration = field_declaration;
- /* Keep index in hash rather than pointer, because array can relocate */
- g_hash_table_insert(struct_declaration->fields_by_name,
- GUINT_TO_POINTER(field->name),
- GUINT_TO_POINTER(index));
- /*
- * Alignment of structure is the max alignment of declarations contained
- * therein.
- */
- struct_declaration->p.alignment = max(struct_declaration->p.alignment,
- field_declaration->alignment);
-}
-
-/*
- * bt_struct_declaration_lookup_field_index - returns field index
- *
- * Returns the index of a field in a structure, or -1 if it does not
- * exist.
- */
-int bt_struct_declaration_lookup_field_index(struct declaration_struct *struct_declaration,
- GQuark field_name)
-{
- gpointer index;
- gboolean found;
-
- found = g_hash_table_lookup_extended(struct_declaration->fields_by_name,
- (gconstpointer) GUINT_TO_POINTER(field_name),
- NULL, &index);
- if (!found)
- return -1;
- return GPOINTER_TO_INT(index);
-}
-
-/*
- * field returned only valid as long as the field structure is not appended to.
- */
-struct declaration_field *
- bt_struct_declaration_get_field_from_index(struct declaration_struct *struct_declaration,
- int index)
-{
- if (index < 0)
- return NULL;
- return &g_array_index(struct_declaration->fields, struct declaration_field, index);
-}
-
-/*
- * field returned only valid as long as the field structure is not appended to.
- */
-struct bt_definition *
-bt_struct_definition_get_field_from_index(const struct definition_struct *_struct,
- int index)
-{
- if (index < 0)
- return NULL;
- return g_ptr_array_index(_struct->fields, index);
-}
-
-uint64_t bt_struct_declaration_len(const struct declaration_struct *struct_declaration)
-{
- return struct_declaration->fields->len;
-}
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