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atomic: Add memory barriers if required for intel primitives

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This commit is contained in:
Chris Wilson 2010-05-20 21:54:16 +01:00
parent 24e684c267
commit 97b4aeba44
1 changed files with 16 additions and 0 deletions
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16
src/cairo-atomic-private.h
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@ -59,8 +59,24 @@ CAIRO_BEGIN_DECLS
typedef int cairo_atomic_int_t;
#ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER
static cairo_always_inline cairo_atomic_int_t
_cairo_atomic_int_get (cairo_atomic_int_t *x)
{
__sync_synchronize ();
return *x;
}
static cairo_always_inline void *
_cairo_atomic_ptr_get (void **x)
{
__sync_synchronize ();
return *x;
}
#else
# define _cairo_atomic_int_get(x) (*x)
# define _cairo_atomic_ptr_get(x) (*x)
#endif
# define _cairo_atomic_int_inc(x) ((void) __sync_fetch_and_add(x, 1))
# define _cairo_atomic_int_dec_and_test(x) (__sync_fetch_and_add(x, -1) == 1)