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Add size accessor to RcBox and ArcBox

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It may be useful to know how big a reference counted allocation is
outside of internal checks.
This commit is contained in:
Emmanuele Bassi 2018-06-12 13:56:29 +01:00
parent 00a723f597
commit 43b7a8f158
5 changed files with 55 additions and 0 deletions
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2
docs/reference/glib/glib-sections.txt
View File

@ -3477,6 +3477,7 @@ g_rc_box_dup
g_rc_box_acquire g_rc_box_acquire
g_rc_box_release g_rc_box_release
g_rc_box_release_full g_rc_box_release_full
g_rc_box_get_size
</SECTION> </SECTION>
<SECTION> <SECTION>
@ -3489,6 +3490,7 @@ g_arc_box_dup
g_arc_box_acquire g_arc_box_acquire
g_arc_box_release g_arc_box_release
g_arc_box_release_full g_arc_box_release_full
g_arc_box_get_size
</SECTION> </SECTION>
<SECTION> <SECTION>

23
glib/garcbox.c
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@ -354,3 +354,26 @@ g_arc_box_release_full (gpointer mem_block,
g_free (real_box); g_free (real_box);
} }
} }
/**
* g_arc_box_get_size:
* @mem_block: (not nullable): a pointer to reference counted data
*
* Retrieves the size of the reference counted data pointed by @mem_block.
*
* Returns: the size of the data
*
* Since: 2.58
*/
gsize
g_arc_box_get_size (gpointer mem_block)
{
GArcBox *real_box = G_ARC_BOX (mem_block);
g_return_val_if_fail (mem_block != NULL, 0);
#ifndef G_DISABLE_ASSERT
g_return_val_if_fail (real_box->magic == G_BOX_MAGIC, 0);
#endif
return real_box->mem_size;
}

23
glib/grcbox.c
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@ -424,3 +424,26 @@ g_rc_box_release_full (gpointer mem_block,
g_free (real_box); g_free (real_box);
} }
} }
/**
* g_rc_box_get_size:
* @mem_block: (not nullable): a pointer to reference counted data
*
* Retrieves the size of the reference counted data pointed by @mem_block.
*
* Returns: the size of the data
*
* Since: 2.58
*/
gsize
g_rc_box_get_size (gpointer mem_block)
{
GRcBox *real_box = G_RC_BOX (mem_block);
g_return_val_if_fail (mem_block != NULL, 0);
#ifndef G_DISABLE_ASSERT
g_return_val_if_fail (real_box->magic == G_BOX_MAGIC, 0);
#endif
return real_box->mem_size;
}

6
glib/grcbox.h
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@ -41,6 +41,9 @@ GLIB_AVAILABLE_IN_2_58
void g_rc_box_release_full (gpointer mem_block, void g_rc_box_release_full (gpointer mem_block,
GDestroyNotify clear_func); GDestroyNotify clear_func);
GLIB_AVAILABLE_IN_2_58
gsize g_rc_box_get_size (gpointer mem_block);
GLIB_AVAILABLE_IN_2_58 GLIB_AVAILABLE_IN_2_58
gpointer g_arc_box_alloc (gsize block_size) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1); gpointer g_arc_box_alloc (gsize block_size) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
GLIB_AVAILABLE_IN_2_58 GLIB_AVAILABLE_IN_2_58
@ -56,6 +59,9 @@ GLIB_AVAILABLE_IN_2_58
void g_arc_box_release_full (gpointer mem_block, void g_arc_box_release_full (gpointer mem_block,
GDestroyNotify clear_func); GDestroyNotify clear_func);
GLIB_AVAILABLE_IN_2_58
gsize g_arc_box_get_size (gpointer mem_block);
#define g_rc_box_new(type) \ #define g_rc_box_new(type) \
((type *) g_rc_box_alloc (sizeof (type))) ((type *) g_rc_box_alloc (sizeof (type)))
#define g_rc_box_new0(type) \ #define g_rc_box_new0(type) \

1
glib/tests/rcbox.c
View File

@ -31,6 +31,7 @@ test_rcbox_new (void)
Point *a = g_rc_box_new (Point); Point *a = g_rc_box_new (Point);
g_assert_nonnull (a); g_assert_nonnull (a);
g_assert_cmpuint (g_rc_box_get_size (a), ==, sizeof (Point));
g_rc_box_release (a); g_rc_box_release (a);