1 /* 2 * Copyright © 2008 Ryan Lortie 3 * Copyright © 2010 Codethink Limited 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2.1 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 17 * 18 * Author: Ryan Lortie <desrt@desrt.ca> 19 */ 20 21 #ifndef __G_BITLOCK_H__ 22 #define __G_BITLOCK_H__ 23 24 #include <glib/gtypes.h> 25 26 #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) 27 #error "Only <glib.h> can be included directly." 28 #endif 29 30 G_BEGIN_DECLS 31 32 GLIB_AVAILABLE_IN_ALL 33 void g_bit_lock (volatile gint *address, 34 gint lock_bit); 35 GLIB_AVAILABLE_IN_ALL 36 gboolean g_bit_trylock (volatile gint *address, 37 gint lock_bit); 38 GLIB_AVAILABLE_IN_ALL 39 void g_bit_unlock (volatile gint *address, 40 gint lock_bit); 41 42 GLIB_AVAILABLE_IN_ALL 43 void g_pointer_bit_lock (volatile void *address, 44 gint lock_bit); 45 GLIB_AVAILABLE_IN_ALL 46 gboolean g_pointer_bit_trylock (volatile void *address, 47 gint lock_bit); 48 GLIB_AVAILABLE_IN_ALL 49 void g_pointer_bit_unlock (volatile void *address, 50 gint lock_bit); 51 52 #ifdef __GNUC__ 53 54 #define g_pointer_bit_lock(address, lock_bit) \ 55 (G_GNUC_EXTENSION ({ \ 56 G_STATIC_ASSERT (sizeof *(address) == sizeof (gpointer)); \ 57 g_pointer_bit_lock ((address), (lock_bit)); \ 58 })) 59 60 #define g_pointer_bit_trylock(address, lock_bit) \ 61 (G_GNUC_EXTENSION ({ \ 62 G_STATIC_ASSERT (sizeof *(address) == sizeof (gpointer)); \ 63 g_pointer_bit_trylock ((address), (lock_bit)); \ 64 })) 65 66 #define g_pointer_bit_unlock(address, lock_bit) \ 67 (G_GNUC_EXTENSION ({ \ 68 G_STATIC_ASSERT (sizeof *(address) == sizeof (gpointer)); \ 69 g_pointer_bit_unlock ((address), (lock_bit)); \ 70 })) 71 72 #endif 73 74 G_END_DECLS 75 76 #endif /* __G_BITLOCK_H_ */ 77