| 1 | /* |
| 2 | * types.c |
| 3 | * |
| 4 | * BabelTrace - Converter |
| 5 | * |
| 6 | * Types registry. |
| 7 | * |
| 8 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * |
| 10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 11 | * of this software and associated documentation files (the "Software"), to deal |
| 12 | * in the Software without restriction, including without limitation the rights |
| 13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 14 | * copies of the Software, and to permit persons to whom the Software is |
| 15 | * furnished to do so, subject to the following conditions: |
| 16 | * |
| 17 | * The above copyright notice and this permission notice shall be included in |
| 18 | * all copies or substantial portions of the Software. |
| 19 | */ |
| 20 | |
| 21 | #include <babeltrace/format.h> |
| 22 | #include <glib.h> |
| 23 | #include <errno.h> |
| 24 | |
| 25 | /* |
| 26 | * Type hash table contains the registered types. Type registration is typically |
| 27 | * performed by a type plugin. |
| 28 | * TODO: support plugin unload (unregistration of types). |
| 29 | */ |
| 30 | GHashTable *type_classes; |
| 31 | |
| 32 | struct type_class *lookup_type(GQuark qname) |
| 33 | { |
| 34 | return g_hash_table_lookup(type_classes, |
| 35 | (gconstpointer) (unsigned long) qname); |
| 36 | } |
| 37 | |
| 38 | static void free_type(struct type_class *type_class) |
| 39 | { |
| 40 | type_class->free(type_class); |
| 41 | } |
| 42 | |
| 43 | int register_type(struct type_class *type_class) |
| 44 | { |
| 45 | if (ctf_lookup_type_class(type_class->name)) |
| 46 | return -EEXIST; |
| 47 | |
| 48 | g_hash_table_insert(type_classes, |
| 49 | (gpointer) (unsigned long) type_class->name, |
| 50 | type_class); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | void type_ref(struct type_class *type_class) |
| 55 | { |
| 56 | type_class->ref++; |
| 57 | } |
| 58 | |
| 59 | void type_unref(struct type_class *type_class) |
| 60 | { |
| 61 | if (!--type_class->ref) |
| 62 | free_type(type_class); |
| 63 | } |
| 64 | |
| 65 | int init_types(void) |
| 66 | { |
| 67 | type_classes = g_hash_table_new_full(g_direct_hash, g_direct_equal, |
| 68 | NULL, (GDestroyNotify) free_type); |
| 69 | if (!type_classes) |
| 70 | return -ENOMEM; |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | int finalize_types(void) |
| 75 | { |
| 76 | g_hash_table_destroy(type_classes); |
| 77 | } |