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libsysprof-capture: remove use of GAtomicRCBox

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If we backport to an older GLib release, we won't have the newer atomic
helpers available. It's really not too much burden to do that manually if
it means we can run on older systems.
This commit is contained in:
Christian Hergert
2020-02-20 10:39:33 -08:00
parent cd8a99402f
commit be6b979714
1 changed files with 21 additions and 9 deletions
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20
src/libsysprof-capture/mapped-ring-buffer.c
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@ -61,6 +61,7 @@ G_STATIC_ASSERT (sizeof (MappedRingHeader) == 16);
*/ */
struct _MappedRingBuffer struct _MappedRingBuffer
{ {
volatile gint ref_count;
int mode; int mode;
int fd; int fd;
void *map; void *map;
@ -199,7 +200,8 @@ mapped_ring_buffer_new_reader (gsize buffer_size)
header->offset = page_size; header->offset = page_size;
header->size = buffer_size - page_size; header->size = buffer_size - page_size;
self = g_atomic_rc_box_new0 (MappedRingBuffer); self = g_slice_new0 (MappedRingBuffer);
self->ref_count = 1;
self->mode = MODE_READER; self->mode = MODE_READER;
self->body_size = buffer_size - page_size; self->body_size = buffer_size - page_size;
self->fd = fd; self->fd = fd;
@ -296,7 +298,8 @@ mapped_ring_buffer_new_writer (gint fd)
return NULL; return NULL;
} }
self = g_atomic_rc_box_new0 (MappedRingBuffer); self = g_slice_new0 (MappedRingBuffer);
self->ref_count = 1;
self->mode = MODE_WRITER; self->mode = MODE_WRITER;
self->fd = fd; self->fd = fd;
self->body_size = buffer_size - page_size; self->body_size = buffer_size - page_size;
@ -325,13 +328,22 @@ mapped_ring_buffer_finalize (MappedRingBuffer *self)
void void
mapped_ring_buffer_unref (MappedRingBuffer *self) mapped_ring_buffer_unref (MappedRingBuffer *self)
{ {
g_atomic_rc_box_release_full (self, (GDestroyNotify)mapped_ring_buffer_finalize); g_return_if_fail (self != NULL);
g_return_if_fail (self->ref_count > 0);
if (g_atomic_int_dec_and_test (&self->ref_count))
mapped_ring_buffer_finalize (self);
} }
MappedRingBuffer * MappedRingBuffer *
mapped_ring_buffer_ref (MappedRingBuffer *self) mapped_ring_buffer_ref (MappedRingBuffer *self)
{ {
return g_atomic_rc_box_acquire (self); g_return_val_if_fail (self != NULL, NULL);
g_return_val_if_fail (self->ref_count > 0, NULL);
g_atomic_int_inc (&self->ref_count);
return self;
} }
gint gint