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Use macros for refcount types API

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If we're using GCC we can use __extension__ to inline the grefcount and
gatomicrefcount API, and avoid the function call.

These macros are only enabled if G_DISABLE_CHECKS is defined, as they
remove critical warnings when the reference counters achieve saturation.
This commit is contained in:
Emmanuele Bassi 2018-06-04 11:38:40 +01:00
parent 9e5a53d576
commit 827c208cbf
2 changed files with 80 additions and 10 deletions
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20
glib/grefcount.c
View File

@ -89,7 +89,7 @@
* Since: 2.58
*/
void
g_ref_count_init (grefcount *rc)
(g_ref_count_init) (grefcount *rc)
{
g_return_if_fail (rc != NULL);
@ -114,7 +114,7 @@ g_ref_count_init (grefcount *rc)
* Since: 2.58
*/
void
g_ref_count_inc (grefcount *rc)
(g_ref_count_inc) (grefcount *rc)
{
grefcount rrc;
@ -147,7 +147,7 @@ g_ref_count_inc (grefcount *rc)
* Since: 2.58
*/
gboolean
g_ref_count_dec (grefcount *rc)
(g_ref_count_dec) (grefcount *rc)
{
grefcount rrc;
@ -179,8 +179,8 @@ g_ref_count_dec (grefcount *rc)
* Since: 2.58
*/
gboolean
g_ref_count_compare (grefcount *rc,
gint val)
(g_ref_count_compare) (grefcount *rc,
gint val)
{
grefcount rrc;
@ -204,7 +204,7 @@ g_ref_count_compare (grefcount *rc,
* Since: 2.58
*/
void
g_atomic_ref_count_init (gatomicrefcount *arc)
(g_atomic_ref_count_init) (gatomicrefcount *arc)
{
g_return_if_fail (arc != NULL);
@ -229,7 +229,7 @@ g_atomic_ref_count_init (gatomicrefcount *arc)
* Since: 2.58
*/
void
g_atomic_ref_count_inc (gatomicrefcount *arc)
(g_atomic_ref_count_inc) (gatomicrefcount *arc)
{
g_return_if_fail (arc != NULL);
g_return_if_fail (g_atomic_int_get (arc) > 0);
@ -254,7 +254,7 @@ g_atomic_ref_count_inc (gatomicrefcount *arc)
* Since: 2.58
*/
gboolean
g_atomic_ref_count_dec (gatomicrefcount *arc)
(g_atomic_ref_count_dec) (gatomicrefcount *arc)
{
g_return_val_if_fail (arc != NULL, FALSE);
g_return_val_if_fail (g_atomic_int_get (arc) > 0, FALSE);
@ -275,8 +275,8 @@ g_atomic_ref_count_dec (gatomicrefcount *arc)
* Since: 2.58
*/
gboolean
g_atomic_ref_count_compare (gatomicrefcount *arc,
gint val)
(g_atomic_ref_count_compare) (gatomicrefcount *arc,
gint val)
{
g_return_val_if_fail (arc != NULL, FALSE);
g_return_val_if_fail (val >= 0, FALSE);

70
glib/grefcount.h
View File

@ -47,6 +47,76 @@ GLIB_AVAILABLE_IN_2_58
gboolean g_atomic_ref_count_compare (gatomicrefcount *arc,
gint val);
/* On GCC we can use __extension__ to inline the API without using
* ancillary functions; we only do this when disabling checks, as
* it disables warnings when saturating the reference counters
*/
#if defined(__GNUC__) && defined(G_DISABLE_CHECKS)
# define g_ref_count_init(rc) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (grefcount)); \
(void) (0 ? *(rc) ^ *(rc) : 1); \
*(rc) = -1; \
}))
# define g_ref_count_inc(rc) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (grefcount)); \
(void) (0 ? *(rc) ^ *(rc) : 1); \
if (*(rc) == G_MININT) ; else { \
*(rc) -= 1; \
} \
}))
# define g_ref_count_dec(rc) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (grefcount)); \
grefcount __rc = *(rc); \
__rc += 1; \
if (__rc == 0) ; else { \
*(rc) = __rc; \
} \
(gboolean) (__rc == 0); \
}))
# define g_ref_count_compare(rc,val) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (grefcount)); \
(void) (0 ? *(rc) ^ (val) : 1); \
(gboolean) (*(rc) == -(val)); \
}))
# define g_atomic_ref_count_init(rc) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (gatomicrefcount)); \
(void) (0 ? *(rc) ^ *(rc) : 1); \
g_atomic_int_set ((rc), 1); \
}))
# define g_atomic_ref_count_inc(rc) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (gatomicrefcount)); \
(void) (0 ? *(rc) ^ *(rc) : 1); \
(void) (g_atomic_int_get (rc) == G_MAXINT ? 0 : g_atomic_int_inc ((rc))); \
}))
# define g_atomic_ref_count_dec(rc) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (gatomicrefcount)); \
(void) (0 ? *(rc) ^ *(rc) : 1); \
g_atomic_int_dec_and_test ((rc)); \
}))
# define g_atomic_ref_count_compare(rc,val) \
(G_GNUC_EXTENSION ({ \
G_STATIC_ASSERT (sizeof *(rc) == sizeof (gatomicrefcount)); \
(void) (0 ? *(rc) ^ (val) : 1); \
(gboolean) (g_atomic_int_get (rc) == (val)); \
}))
#endif /* __GNUC__ && G_DISABLE_CHECKS */
G_END_DECLS
#endif /* __GREFCOUNT_H__ */