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buffer pool: cull buffers

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Leon Henrik Plickat 2023-08-13 03:28:33 +02:00
commit b8bdb2b238
1 changed files with 20 additions and 2 deletions
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22
wayneko.c
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@ -102,7 +102,8 @@ struct timespec last_tick;
* keep all those extra buffers around if we can avoid it, as to not have
* unecessary memory overhead.
*/
int max_buffer_multiplicity = 3;
const int max_buffer_multiplicity = 3;
const int surface_amount = 1;
struct wl_list buffer_pool;
@ -406,6 +407,22 @@ static struct Buffer *buffer_pool_new_buffer (uint32_t width, uint32_t height)
return buffer;
}
static void buffer_pool_cull_buffers (void)
{
int to_remove = wl_list_length(&buffer_pool) - (max_buffer_multiplicity * surface_amount);
struct Buffer *buffer, *tmp;
wl_list_for_each_safe(buffer, tmp, &buffer_pool, link)
{
if (to_remove == 0)
break;
if (buffer->busy)
continue;
buffer_finish(buffer);
buffer_destroy(buffer);
to_remove--;
}
}
/**
* Get a buffer of the specified dimenisons. If possible an idle buffer is
* reused, otherweise a new one is created.
@ -416,7 +433,8 @@ static struct Buffer *buffer_pool_next_buffer (uint32_t width, uint32_t height)
if ( ret == NULL )
ret = buffer_pool_new_buffer(width, height);
// XXX cull buffers
if ( wl_list_length(&buffer_pool) > max_buffer_multiplicity * surface_amount )
buffer_pool_cull_buffers();
return ret;
}