diff options
Diffstat (limited to 'shared/nm-glib-aux/nm-glib.h')
| -rw-r--r-- | shared/nm-glib-aux/nm-glib.h | 70 |
1 files changed, 57 insertions, 13 deletions
diff --git a/shared/nm-glib-aux/nm-glib.h b/shared/nm-glib-aux/nm-glib.h index 5125617d..9794e1fb 100644 --- a/shared/nm-glib-aux/nm-glib.h +++ b/shared/nm-glib-aux/nm-glib.h @@ -586,6 +586,49 @@ _nm_g_value_unset(GValue *value) /*****************************************************************************/ +/* g_atomic_pointer_get() is implemented as a macro, and it is also used for + * (gsize *) arguments. However, that leads to compiler warnings in certain + * configurations. Work around it, by redefining the macro. */ +static inline gpointer +_g_atomic_pointer_get(void **atomic) +{ + return g_atomic_pointer_get(atomic); +} +#undef g_atomic_pointer_get +#define g_atomic_pointer_get(atomic) \ + ({ \ + typeof(*atomic) *const _atomic = (atomic); \ + \ + /* g_atomic_pointer_get() is used by glib also for (gsize *) pointers, + * not only pointers to pointers. We thus don't enforce that (*atomic) + * is a pointer, but of suitable size/alignment. */ \ + \ + G_STATIC_ASSERT(sizeof(*_atomic) == sizeof(gpointer)); \ + G_STATIC_ASSERT(_nm_alignof(*_atomic) == _nm_alignof(gpointer)); \ + (void) (0 ? (gpointer) * (_atomic) : NULL); \ + \ + (typeof(*_atomic)) _g_atomic_pointer_get((void **) _atomic); \ + }) + +/* Reimplement g_atomic_pointer_set() macro too. Our variant does more type + * checks. */ +static inline void +_g_atomic_pointer_set(void **atomic, void *newval) +{ + return g_atomic_pointer_set(atomic, newval); +} +#undef g_atomic_pointer_set +#define g_atomic_pointer_set(atomic, newval) \ + ({ \ + typeof(*atomic) *const _atomic = (atomic); \ + typeof(*_atomic) const _newval = (newval); \ + _nm_unused gconstpointer const _val_type_check = _newval; \ + \ + (void) (0 ? (gpointer) * (_atomic) : NULL); \ + \ + _g_atomic_pointer_set((void **) _atomic, (void *) _newval); \ + }) + /* Glib implements g_atomic_pointer_compare_and_exchange() as a macro. * For one, to inline the atomic operation and also to perform some type checks * on the arguments. @@ -594,22 +637,23 @@ _nm_g_value_unset(GValue *value) * pointers there. Reimplement the macro to get that right, but with stronger * type checks (as we use typeof()). Had one job. */ static inline gboolean -_g_atomic_pointer_compare_and_exchange(volatile void *atomic, - gconstpointer oldval, - gconstpointer newval) +_g_atomic_pointer_compare_and_exchange(void **atomic, void *oldval, void *newval) { - return g_atomic_pointer_compare_and_exchange((void **) atomic, - (void *) oldval, - (void *) newval); + return g_atomic_pointer_compare_and_exchange(atomic, oldval, newval); } #undef g_atomic_pointer_compare_and_exchange -#define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \ - ({ \ - typeof(atomic) const _atomic = (atomic); \ - typeof(*_atomic) const _oldval = (oldval); \ - typeof(*_atomic) const _newval = (newval); \ - \ - _g_atomic_pointer_compare_and_exchange(_atomic, _oldval, _newval); \ +#define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \ + ({ \ + typeof(*atomic) *const _atomic = (atomic); \ + typeof(*_atomic) const _oldval = (oldval); \ + typeof(*_atomic) const _newval = (newval); \ + _nm_unused gconstpointer const _val_type_check = _oldval; \ + \ + (void) (0 ? (gpointer) * (_atomic) : NULL); \ + \ + _g_atomic_pointer_compare_and_exchange((void **) _atomic, \ + (void *) _oldval, \ + (void *) _newval); \ }) /*****************************************************************************/ |