| /* |
| * Copyright © 2011 Ryan Lortie |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| * |
| * Author: Ryan Lortie <desrt@desrt.ca> |
| */ |
| |
| #ifndef __G_ATOMIC_H__ |
| #define __G_ATOMIC_H__ |
| |
| #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) |
| #error "Only <glib.h> can be included directly." |
| #endif |
| |
| #include <glib/gtypes.h> |
| |
| G_BEGIN_DECLS |
| |
| GLIB_AVAILABLE_IN_ALL |
| gint g_atomic_int_get (const volatile gint *atomic); |
| GLIB_AVAILABLE_IN_ALL |
| void g_atomic_int_set (volatile gint *atomic, |
| gint newval); |
| GLIB_AVAILABLE_IN_ALL |
| void g_atomic_int_inc (volatile gint *atomic); |
| GLIB_AVAILABLE_IN_ALL |
| gboolean g_atomic_int_dec_and_test (volatile gint *atomic); |
| GLIB_AVAILABLE_IN_ALL |
| gboolean g_atomic_int_compare_and_exchange (volatile gint *atomic, |
| gint oldval, |
| gint newval); |
| GLIB_AVAILABLE_IN_ALL |
| gint g_atomic_int_add (volatile gint *atomic, |
| gint val); |
| GLIB_AVAILABLE_IN_2_30 |
| guint g_atomic_int_and (volatile guint *atomic, |
| guint val); |
| GLIB_AVAILABLE_IN_2_30 |
| guint g_atomic_int_or (volatile guint *atomic, |
| guint val); |
| GLIB_AVAILABLE_IN_ALL |
| guint g_atomic_int_xor (volatile guint *atomic, |
| guint val); |
| |
| GLIB_AVAILABLE_IN_ALL |
| gpointer g_atomic_pointer_get (const volatile void *atomic); |
| GLIB_AVAILABLE_IN_ALL |
| void g_atomic_pointer_set (volatile void *atomic, |
| gpointer newval); |
| GLIB_AVAILABLE_IN_ALL |
| gboolean g_atomic_pointer_compare_and_exchange (volatile void *atomic, |
| gpointer oldval, |
| gpointer newval); |
| GLIB_AVAILABLE_IN_ALL |
| gssize g_atomic_pointer_add (volatile void *atomic, |
| gssize val); |
| GLIB_AVAILABLE_IN_2_30 |
| gsize g_atomic_pointer_and (volatile void *atomic, |
| gsize val); |
| GLIB_AVAILABLE_IN_2_30 |
| gsize g_atomic_pointer_or (volatile void *atomic, |
| gsize val); |
| GLIB_AVAILABLE_IN_ALL |
| gsize g_atomic_pointer_xor (volatile void *atomic, |
| gsize val); |
| |
| GLIB_DEPRECATED_IN_2_30_FOR(g_atomic_int_add) |
| gint g_atomic_int_exchange_and_add (volatile gint *atomic, |
| gint val); |
| |
| G_END_DECLS |
| |
| #if defined(G_ATOMIC_LOCK_FREE) && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) |
| |
| /* We prefer the new C11-style atomic extension of GCC if available */ |
| #if defined(__ATOMIC_SEQ_CST) && !defined(__clang__) |
| |
| /* This assumes sizeof(int) is 4: gatomic.c statically |
| * asserts that (using G_STATIC_ASSERT at top-level in a header was |
| * problematic, see #730932) */ |
| |
| #define g_atomic_int_get(atomic) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ *(atomic) : 1); \ |
| (gint) __atomic_load_4 ((atomic), __ATOMIC_SEQ_CST); \ |
| })) |
| #define g_atomic_int_set(atomic, newval) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ (newval) : 1); \ |
| __atomic_store_4 ((atomic), (newval), __ATOMIC_SEQ_CST); \ |
| })) |
| |
| #if GLIB_SIZEOF_VOID_P == 8 |
| |
| #define g_atomic_pointer_get(atomic) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| guint64 gapg_temp = __atomic_load_8 ((atomic), __ATOMIC_SEQ_CST); \ |
| (gpointer) gapg_temp; \ |
| })) |
| #define g_atomic_pointer_set(atomic, newval) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| __atomic_store_8 ((atomic), (gsize) (newval), __ATOMIC_SEQ_CST); \ |
| })) |
| |
| #else /* GLIB_SIZEOF_VOID_P == 8 */ |
| |
| /* This assumes that if sizeof(void *) is not 8, then it is 4: |
| * gatomic.c statically asserts that (using G_STATIC_ASSERT |
| * at top-level in a header was problematic, see #730932) */ |
| |
| #define g_atomic_pointer_get(atomic) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| guint32 gapg_temp = __atomic_load_4 ((atomic), __ATOMIC_SEQ_CST); \ |
| (gpointer) gapg_temp; \ |
| })) |
| #define g_atomic_pointer_set(atomic, newval) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| __atomic_store_4 ((atomic), (gsize) (newval), __ATOMIC_SEQ_CST); \ |
| })) |
| |
| #endif /* GLIB_SIZEOF_VOID_P == 8 */ |
| |
| #else /* defined(__ATOMIC_SEQ_CST) */ |
| |
| #define g_atomic_int_get(atomic) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ *(atomic) : 1); \ |
| __sync_synchronize (); \ |
| (gint) *(atomic); \ |
| })) |
| #define g_atomic_int_set(atomic, newval) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ (newval) : 1); \ |
| *(atomic) = (newval); \ |
| __sync_synchronize (); \ |
| })) |
| #define g_atomic_pointer_get(atomic) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| __sync_synchronize (); \ |
| (gpointer) *(atomic); \ |
| })) |
| #define g_atomic_pointer_set(atomic, newval) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| *(atomic) = (__typeof__ (*(atomic))) (gsize) (newval); \ |
| __sync_synchronize (); \ |
| })) |
| |
| #endif /* !defined(__ATOMIC_SEQ_CST) */ |
| |
| #define g_atomic_int_inc(atomic) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ *(atomic) : 1); \ |
| (void) __sync_fetch_and_add ((atomic), 1); \ |
| })) |
| #define g_atomic_int_dec_and_test(atomic) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ *(atomic) : 1); \ |
| __sync_fetch_and_sub ((atomic), 1) == 1; \ |
| })) |
| #define g_atomic_int_compare_and_exchange(atomic, oldval, newval) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ (newval) ^ (oldval) : 1); \ |
| __sync_bool_compare_and_swap ((atomic), (oldval), (newval)) ? TRUE : FALSE; \ |
| })) |
| #define g_atomic_int_add(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ (val) : 1); \ |
| (gint) __sync_fetch_and_add ((atomic), (val)); \ |
| })) |
| #define g_atomic_int_and(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ (val) : 1); \ |
| (guint) __sync_fetch_and_and ((atomic), (val)); \ |
| })) |
| #define g_atomic_int_or(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ (val) : 1); \ |
| (guint) __sync_fetch_and_or ((atomic), (val)); \ |
| })) |
| #define g_atomic_int_xor(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ |
| (void) (0 ? *(atomic) ^ (val) : 1); \ |
| (guint) __sync_fetch_and_xor ((atomic), (val)); \ |
| })) |
| |
| #define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| __sync_bool_compare_and_swap ((atomic), (oldval), (newval)) ? TRUE : FALSE; \ |
| })) |
| #define g_atomic_pointer_add(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| (void) (0 ? (val) ^ (val) : 1); \ |
| (gssize) __sync_fetch_and_add ((atomic), (val)); \ |
| })) |
| #define g_atomic_pointer_and(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| (void) (0 ? (val) ^ (val) : 1); \ |
| (gsize) __sync_fetch_and_and ((atomic), (val)); \ |
| })) |
| #define g_atomic_pointer_or(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| (void) (0 ? (val) ^ (val) : 1); \ |
| (gsize) __sync_fetch_and_or ((atomic), (val)); \ |
| })) |
| #define g_atomic_pointer_xor(atomic, val) \ |
| (G_GNUC_EXTENSION ({ \ |
| G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ |
| (void) (0 ? (gpointer) *(atomic) : NULL); \ |
| (void) (0 ? (val) ^ (val) : 1); \ |
| (gsize) __sync_fetch_and_xor ((atomic), (val)); \ |
| })) |
| |
| #else /* defined(G_ATOMIC_LOCK_FREE) && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) */ |
| |
| #define g_atomic_int_get(atomic) \ |
| (g_atomic_int_get ((gint *) (atomic))) |
| #define g_atomic_int_set(atomic, newval) \ |
| (g_atomic_int_set ((gint *) (atomic), (gint) (newval))) |
| #define g_atomic_int_compare_and_exchange(atomic, oldval, newval) \ |
| (g_atomic_int_compare_and_exchange ((gint *) (atomic), (oldval), (newval))) |
| #define g_atomic_int_add(atomic, val) \ |
| (g_atomic_int_add ((gint *) (atomic), (val))) |
| #define g_atomic_int_and(atomic, val) \ |
| (g_atomic_int_and ((guint *) (atomic), (val))) |
| #define g_atomic_int_or(atomic, val) \ |
| (g_atomic_int_or ((guint *) (atomic), (val))) |
| #define g_atomic_int_xor(atomic, val) \ |
| (g_atomic_int_xor ((guint *) (atomic), (val))) |
| #define g_atomic_int_inc(atomic) \ |
| (g_atomic_int_inc ((gint *) (atomic))) |
| #define g_atomic_int_dec_and_test(atomic) \ |
| (g_atomic_int_dec_and_test ((gint *) (atomic))) |
| |
| #define g_atomic_pointer_get(atomic) \ |
| (g_atomic_pointer_get (atomic)) |
| #define g_atomic_pointer_set(atomic, newval) \ |
| (g_atomic_pointer_set ((atomic), (gpointer) (newval))) |
| #define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \ |
| (g_atomic_pointer_compare_and_exchange ((atomic), (gpointer) (oldval), (gpointer) (newval))) |
| #define g_atomic_pointer_add(atomic, val) \ |
| (g_atomic_pointer_add ((atomic), (gssize) (val))) |
| #define g_atomic_pointer_and(atomic, val) \ |
| (g_atomic_pointer_and ((atomic), (gsize) (val))) |
| #define g_atomic_pointer_or(atomic, val) \ |
| (g_atomic_pointer_or ((atomic), (gsize) (val))) |
| #define g_atomic_pointer_xor(atomic, val) \ |
| (g_atomic_pointer_xor ((atomic), (gsize) (val))) |
| |
| #endif /* defined(__GNUC__) && defined(G_ATOMIC_OP_USE_GCC_BUILTINS) */ |
| |
| #endif /* __G_ATOMIC_H__ */ |
