diff options
Diffstat (limited to 'glib/gatomic.h')
| -rw-r--r-- | glib/gatomic.h | 125 |
1 files changed, 120 insertions, 5 deletions
diff --git a/glib/gatomic.h b/glib/gatomic.h index 086aae368..148424dc3 100644 --- a/glib/gatomic.h +++ b/glib/gatomic.h @@ -44,6 +44,14 @@ GLIB_AVAILABLE_IN_ALL gboolean g_atomic_int_compare_and_exchange (volatile gint *atomic, gint oldval, gint newval); +GLIB_AVAILABLE_IN_2_74 +gboolean g_atomic_int_compare_and_exchange_full (gint *atomic, + gint oldval, + gint newval, + gint *preval); +GLIB_AVAILABLE_IN_2_74 +gint g_atomic_int_exchange (gint *atomic, + gint newval); GLIB_AVAILABLE_IN_ALL gint g_atomic_int_add (volatile gint *atomic, gint val); @@ -66,6 +74,14 @@ GLIB_AVAILABLE_IN_ALL gboolean g_atomic_pointer_compare_and_exchange (volatile void *atomic, gpointer oldval, gpointer newval); +GLIB_AVAILABLE_IN_2_74 +gboolean g_atomic_pointer_compare_and_exchange_full (void *atomic, + gpointer oldval, + gpointer newval, + void *preval); +GLIB_AVAILABLE_IN_2_74 +gpointer g_atomic_pointer_exchange (void *atomic, + gpointer newval); GLIB_AVAILABLE_IN_ALL gssize g_atomic_pointer_add (volatile void *atomic, gssize val); @@ -154,7 +170,7 @@ G_END_DECLS (void) (0 ? *(atomic) ^ *(atomic) : 1); \ __atomic_fetch_sub ((atomic), 1, __ATOMIC_SEQ_CST) == 1; \ })) -#if defined(glib_typeof) && defined(__cplusplus) && __cplusplus >= 201103L +#if defined(glib_typeof) && defined(G_CXX_STD_VERSION) /* See comments below about equivalent g_atomic_pointer_compare_and_exchange() * shenanigans for type-safety when compiling in C++ mode. */ #define g_atomic_int_compare_and_exchange(atomic, oldval, newval) \ @@ -164,7 +180,7 @@ G_END_DECLS (void) (0 ? *(atomic) ^ (newval) ^ (oldval) : 1); \ __atomic_compare_exchange_n ((atomic), &gaicae_oldval, (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \ })) -#else /* if !(defined(glib_typeof) && defined(__cplusplus) && __cplusplus >= 201103L) */ +#else /* if !(defined(glib_typeof) && defined(G_CXX_STD_VERSION)) */ #define g_atomic_int_compare_and_exchange(atomic, oldval, newval) \ (G_GNUC_EXTENSION ({ \ gint gaicae_oldval = (oldval); \ @@ -173,6 +189,22 @@ G_END_DECLS __atomic_compare_exchange_n ((atomic), (void *) (&(gaicae_oldval)), (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \ })) #endif /* defined(glib_typeof) */ +#define g_atomic_int_compare_and_exchange_full(atomic, oldval, newval, preval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ + G_STATIC_ASSERT (sizeof *(preval) == sizeof (gint)); \ + (void) (0 ? *(atomic) ^ (newval) ^ (oldval) ^ *(preval) : 1); \ + *(preval) = (oldval); \ + __atomic_compare_exchange_n ((atomic), (preval), (newval), FALSE, \ + __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) \ + ? TRUE : FALSE; \ + })) +#define g_atomic_int_exchange(atomic, newval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ + (void) (0 ? *(atomic) ^ (newval) : 1); \ + (gint) __atomic_exchange_n ((atomic), (newval), __ATOMIC_SEQ_CST); \ + })) #define g_atomic_int_add(atomic, val) \ (G_GNUC_EXTENSION ({ \ G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ @@ -198,7 +230,7 @@ G_END_DECLS (guint) __atomic_fetch_xor ((atomic), (val), __ATOMIC_SEQ_CST); \ })) -#if defined(glib_typeof) && defined(__cplusplus) && __cplusplus >= 201103L +#if defined(glib_typeof) && defined(G_CXX_STD_VERSION) /* This is typesafe because we check we can assign oldval to the type of * (*atomic). Unfortunately it can only be done in C++ because gcc/clang warn * when atomic is volatile and not oldval, or when atomic is gsize* and oldval @@ -209,13 +241,14 @@ G_END_DECLS * https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1715#note_1024120. */ #define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \ (G_GNUC_EXTENSION ({ \ - G_STATIC_ASSERT (sizeof (oldval) == sizeof (gpointer)); \ + G_STATIC_ASSERT (sizeof (static_cast<glib_typeof (*(atomic))>((oldval))) \ + == sizeof (gpointer)); \ glib_typeof (*(atomic)) gapcae_oldval = (oldval); \ G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ (void) (0 ? (gpointer) *(atomic) : NULL); \ __atomic_compare_exchange_n ((atomic), &gapcae_oldval, (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \ })) -#else /* if !(defined(glib_typeof) && defined(__cplusplus) && __cplusplus >= 201103L) */ +#else /* if !(defined(glib_typeof) && defined(G_CXX_STD_VERSION) */ #define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \ (G_GNUC_EXTENSION ({ \ G_STATIC_ASSERT (sizeof (oldval) == sizeof (gpointer)); \ @@ -225,6 +258,23 @@ G_END_DECLS __atomic_compare_exchange_n ((atomic), (void *) (&(gapcae_oldval)), (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \ })) #endif /* defined(glib_typeof) */ +#define g_atomic_pointer_compare_and_exchange_full(atomic, oldval, newval, preval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ + G_STATIC_ASSERT (sizeof *(preval) == sizeof (gpointer)); \ + (void) (0 ? (gpointer) *(atomic) : NULL); \ + (void) (0 ? (gpointer) *(preval) : NULL); \ + *(preval) = (oldval); \ + __atomic_compare_exchange_n ((atomic), (preval), (newval), FALSE, \ + __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? \ + TRUE : FALSE; \ + })) +#define g_atomic_pointer_exchange(atomic, newval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ + (void) (0 ? (gpointer) *(atomic) : NULL); \ + (gpointer) __atomic_exchange_n ((atomic), (newval), __ATOMIC_SEQ_CST); \ + })) #define g_atomic_pointer_add(atomic, val) \ (G_GNUC_EXTENSION ({ \ G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ @@ -355,6 +405,34 @@ G_END_DECLS (void) (0 ? *(atomic) ^ (newval) ^ (oldval) : 1); \ __sync_bool_compare_and_swap ((atomic), (oldval), (newval)) ? TRUE : FALSE; \ })) +#define g_atomic_int_compare_and_exchange_full(atomic, oldval, newval, preval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ + G_STATIC_ASSERT (sizeof *(preval) == sizeof (gint)); \ + (void) (0 ? *(atomic) ^ (newval) ^ (oldval) ^ *(preval) : 1); \ + *(preval) = __sync_val_compare_and_swap ((atomic), (oldval), (newval)); \ + (*(preval) == (oldval)) ? TRUE : FALSE; \ + })) +#if defined(_GLIB_GCC_HAVE_SYNC_SWAP) +#define g_atomic_int_exchange(atomic, newval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ + (void) (0 ? *(atomic) ^ (newval) : 1); \ + (gint) __sync_swap ((atomic), (newval)); \ + })) +#else /* defined(_GLIB_GCC_HAVE_SYNC_SWAP) */ + #define g_atomic_int_exchange(atomic, newval) \ + (G_GNUC_EXTENSION ({ \ + gint oldval; \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ + (void) (0 ? *(atomic) ^ (newval) : 1); \ + do \ + { \ + oldval = *atomic; \ + } while (!__sync_bool_compare_and_swap (atomic, oldval, newval)); \ + oldval; \ + })) +#endif /* defined(_GLIB_GCC_HAVE_SYNC_SWAP) */ #define g_atomic_int_add(atomic, val) \ (G_GNUC_EXTENSION ({ \ G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint)); \ @@ -386,6 +464,35 @@ G_END_DECLS (void) (0 ? (gpointer) *(atomic) : NULL); \ __sync_bool_compare_and_swap ((atomic), (oldval), (newval)) ? TRUE : FALSE; \ })) +#define g_atomic_pointer_compare_and_exchange_full(atomic, oldval, newval, preval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ + G_STATIC_ASSERT (sizeof *(preval) == sizeof (gpointer)); \ + (void) (0 ? (gpointer) *(atomic) : NULL); \ + (void) (0 ? (gpointer) *(preval) : NULL); \ + *(preval) = __sync_val_compare_and_swap ((atomic), (oldval), (newval)); \ + (*(preval) == (oldval)) ? TRUE : FALSE; \ + })) +#if defined(_GLIB_GCC_HAVE_SYNC_SWAP) +#define g_atomic_pointer_exchange(atomic, newval) \ + (G_GNUC_EXTENSION ({ \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ + (void) (0 ? (gpointer) *(atomic) : NULL); \ + (gpointer) __sync_swap ((atomic), (newval)); \ + })) +#else +#define g_atomic_pointer_exchange(atomic, newval) \ + (G_GNUC_EXTENSION ({ \ + gpointer oldval; \ + G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ + (void) (0 ? (gpointer) *(atomic) : NULL); \ + do \ + { \ + oldval = (gpointer) *atomic; \ + } while (!__sync_bool_compare_and_swap (atomic, oldval, newval)); \ + oldval; \ + })) +#endif /* defined(_GLIB_GCC_HAVE_SYNC_SWAP) */ #define g_atomic_pointer_add(atomic, val) \ (G_GNUC_EXTENSION ({ \ G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer)); \ @@ -425,6 +532,10 @@ G_END_DECLS (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_compare_and_exchange_full(atomic, oldval, newval, preval) \ + (g_atomic_int_compare_and_exchange_full ((gint *) (atomic), (oldval), (newval), (gint *) (preval))) +#define g_atomic_int_exchange(atomic, newval) \ + (g_atomic_int_exchange ((gint *) (atomic), (newval))) #define g_atomic_int_add(atomic, val) \ (g_atomic_int_add ((gint *) (atomic), (val))) #define g_atomic_int_and(atomic, val) \ @@ -458,6 +569,10 @@ G_END_DECLS #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_compare_and_exchange_full(atomic, oldval, newval, prevval) \ + (g_atomic_pointer_compare_and_exchange_full ((atomic), (gpointer) (oldval), (gpointer) (newval), (prevval))) +#define g_atomic_pointer_exchange(atomic, newval) \ + (g_atomic_pointer_exchange ((atomic), (gpointer) (newval))) #define g_atomic_pointer_add(atomic, val) \ (g_atomic_pointer_add ((atomic), (gssize) (val))) #define g_atomic_pointer_and(atomic, val) \ |