1 /* GObject - GLib Type, Object, Parameter and Signal Library 2 * Copyright (C) 2009 Benjamin Otte <otte@gnome.org> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General 15 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 #ifndef __G_ATOMIC_ARRAY_H__ 18 #define __G_ATOMIC_ARRAY_H__ 19 20 #if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION) 21 #error "Only <glib-object.h> can be included directly." 22 #endif 23 24 #include <glib/glib.h> 25 26 G_BEGIN_DECLS 27 28 #define G_ATOMIC_ARRAY_DATA_SIZE(mem) (*((gsize *) (mem) - 1)) 29 30 typedef struct _GAtomicArray GAtomicArray; 31 struct _GAtomicArray { 32 gpointer data; /* elements - atomic */ 33 }; 34 35 void _g_atomic_array_init (GAtomicArray *array); 36 gpointer _g_atomic_array_copy (GAtomicArray *array, 37 gsize header_size, 38 gsize additional_element_size); 39 void _g_atomic_array_update (GAtomicArray *array, 40 gpointer new_data); 41 42 #define G_ATOMIC_ARRAY_GET_LOCKED(_array, _type) ((_type *)((_array)->data)) 43 44 #define G_ATOMIC_ARRAY_DO_TRANSACTION(_array, _type, _C_) G_STMT_START { \ 45 gpointer *_datap = &(_array)->data; \ 46 _type *transaction_data, *__check; \ 47 \ 48 __check = g_atomic_pointer_get (_datap); \ 49 do { \ 50 transaction_data = __check; \ 51 {_C_;} \ 52 __check = g_atomic_pointer_get (_datap); \ 53 } while (transaction_data != __check); \ 54 } G_STMT_END 55 56 G_END_DECLS 57 58 #endif /* __G_ATOMIC_ARRAY_H__ */ 59