| 1 | /* GLIB - Library of useful routines for C programming |
|---|
| 2 | * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
|---|
| 3 | * |
|---|
| 4 | * g_atomic_*: atomic operations. |
|---|
| 5 | * Copyright (C) 2003 Sebastian Wilhelmi |
|---|
| 6 | * |
|---|
| 7 | * This library is free software; you can redistribute it and/or |
|---|
| 8 | * modify it under the terms of the GNU Lesser General Public |
|---|
| 9 | * License as published by the Free Software Foundation; either |
|---|
| 10 | * version 2 of the License, or (at your option) any later version. |
|---|
| 11 | * |
|---|
| 12 | * This library is distributed in the hope that it will be useful, |
|---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 15 | * Lesser General Public License for more details. |
|---|
| 16 | * |
|---|
| 17 | * You should have received a copy of the GNU Lesser General Public |
|---|
| 18 | * License along with this library; if not, write to the |
|---|
| 19 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
|---|
| 20 | * Boston, MA 02111-1307, USA. |
|---|
| 21 | */ |
|---|
| 22 | |
|---|
| 23 | /* |
|---|
| 24 | * Modified by the GLib Team and others 1997-2000. See the AUTHORS |
|---|
| 25 | * file for a list of people on the GLib Team. See the ChangeLog |
|---|
| 26 | * files for a list of changes. These files are distributed with |
|---|
| 27 | * GLib at ftp://ftp.gtk.org/pub/gtk/. |
|---|
| 28 | */ |
|---|
| 29 | |
|---|
| 30 | #ifndef __G_ATOMIC_H__ |
|---|
| 31 | #define __G_ATOMIC_H__ |
|---|
| 32 | |
|---|
| 33 | #include <glib/gtypes.h> |
|---|
| 34 | |
|---|
| 35 | G_BEGIN_DECLS |
|---|
| 36 | |
|---|
| 37 | gint g_atomic_int_exchange_and_add (gint *atomic, |
|---|
| 38 | gint val); |
|---|
| 39 | void g_atomic_int_add (gint *atomic, |
|---|
| 40 | gint val); |
|---|
| 41 | gboolean g_atomic_int_compare_and_exchange (gint *atomic, |
|---|
| 42 | gint oldval, |
|---|
| 43 | gint newval); |
|---|
| 44 | gboolean g_atomic_pointer_compare_and_exchange (gpointer *atomic, |
|---|
| 45 | gpointer oldval, |
|---|
| 46 | gpointer newval); |
|---|
| 47 | |
|---|
| 48 | #ifdef G_ATOMIC_OP_MEMORY_BARRIER_NEEDED |
|---|
| 49 | gint g_atomic_int_get (gint *atomic); |
|---|
| 50 | gpointer g_atomic_pointer_get (gpointer *atomic); |
|---|
| 51 | #else /* !G_ATOMIC_OP_MEMORY_BARRIER_NEEDED */ |
|---|
| 52 | # define g_atomic_int_get(atomic) (*(atomic)) |
|---|
| 53 | # define g_atomic_pointer_get(atomic) (*(atomic)) |
|---|
| 54 | #endif /* G_ATOMIC_OP_MEMORY_BARRIER_NEEDED */ |
|---|
| 55 | |
|---|
| 56 | #define g_atomic_int_inc(atomic) (g_atomic_int_add ((atomic), 1)) |
|---|
| 57 | #define g_atomic_int_dec_and_test(atomic) \ |
|---|
| 58 | (g_atomic_int_exchange_and_add ((atomic), -1) == 1) |
|---|
| 59 | |
|---|
| 60 | G_END_DECLS |
|---|
| 61 | |
|---|
| 62 | #endif /* __G_ATOMIC_H__ */ |
|---|
