static void
pb_cache_manager_destroy(struct pb_manager *_mgr)
{
struct pb_cache_manager *mgr = pb_cache_manager(_mgr);
pb_cache_deinit(&mgr->cache);
FREE(mgr);
}
static void
pb_cache_manager_flush(struct pb_manager *_mgr)
{
struct pb_cache_manager *mgr = pb_cache_manager(_mgr);
pb_cache_release_all_buffers(&mgr->cache);
assert(mgr->provider->flush);
if(mgr->provider->flush)
mgr->provider->flush(mgr->provider);
}
static struct pb_buffer *
pb_cache_manager_create_buffer(struct pb_manager *_mgr,
pb_size size,
const struct pb_desc *desc)
{
struct pb_cache_manager *mgr = pb_cache_manager(_mgr);
struct pb_cache_buffer *buf;
/* get a buffer from the cache */
buf = (struct pb_cache_buffer *)
pb_cache_reclaim_buffer(&mgr->cache, size, desc->alignment,
desc->usage, 0);
if (buf)
return &buf->base;
/* create a new one */
buf = CALLOC_STRUCT(pb_cache_buffer);
if (!buf)
return NULL;
buf->buffer = mgr->provider->create_buffer(mgr->provider, size, desc);
/* Empty the cache and try again. */
if (!buf->buffer) {
pb_cache_release_all_buffers(&mgr->cache);
buf->buffer = mgr->provider->create_buffer(mgr->provider, size, desc);
}
if(!buf->buffer) {
FREE(buf);
return NULL;
}
assert(pipe_is_referenced(&buf->buffer->reference));
assert(pb_check_alignment(desc->alignment, buf->buffer->alignment));
assert(buf->buffer->size >= size);
pipe_reference_init(&buf->base.reference, 1);
buf->base.alignment = buf->buffer->alignment;
buf->base.usage = buf->buffer->usage;
buf->base.size = buf->buffer->size;
buf->base.vtbl = &pb_cache_buffer_vtbl;
buf->mgr = mgr;
pb_cache_init_entry(&mgr->cache, &buf->cache_entry, &buf->base, 0);
return &buf->base;
}
static void
pb_cache_manager_flush(struct pb_manager *_mgr)
{
struct pb_cache_manager *mgr = pb_cache_manager(_mgr);
struct list_head *curr, *next;
struct pb_cache_buffer *buf;
pipe_mutex_lock(mgr->mutex);
curr = mgr->delayed.next;
next = curr->next;
while(curr != &mgr->delayed) {
buf = LIST_ENTRY(struct pb_cache_buffer, curr, head);
_pb_cache_buffer_destroy(buf);
curr = next;
next = curr->next;
}
pipe_mutex_unlock(mgr->mutex);
assert(mgr->provider->flush);
if(mgr->provider->flush)
mgr->provider->flush(mgr->provider);
}
static struct pb_buffer *
pb_cache_manager_create_buffer(struct pb_manager *_mgr,
pb_size size,
const struct pb_desc *desc)
{
struct pb_cache_manager *mgr = pb_cache_manager(_mgr);
struct pb_cache_buffer *buf;
struct pb_cache_buffer *curr_buf;
struct list_head *curr, *next;
int64_t now;
pipe_mutex_lock(mgr->mutex);
buf = NULL;
curr = mgr->delayed.next;
next = curr->next;
/* search in the expired buffers, freeing them in the process */
now = os_time_get();
while(curr != &mgr->delayed) {
curr_buf = LIST_ENTRY(struct pb_cache_buffer, curr, head);
if(!buf && pb_cache_is_buffer_compat(curr_buf, size, desc))
buf = curr_buf;
else if(os_time_timeout(curr_buf->start, curr_buf->end, now))
_pb_cache_buffer_destroy(curr_buf);
else
/* This buffer (and all hereafter) are still hot in cache */
break;
curr = next;
next = curr->next;
}
/* keep searching in the hot buffers */
if(!buf) {
while(curr != &mgr->delayed) {
curr_buf = LIST_ENTRY(struct pb_cache_buffer, curr, head);
if(pb_cache_is_buffer_compat(curr_buf, size, desc)) {
buf = curr_buf;
break;
}
/* no need to check the timeout here */
curr = next;
next = curr->next;
}
}
if(buf) {
LIST_DEL(&buf->head);
pipe_mutex_unlock(mgr->mutex);
/* Increase refcount */
pipe_reference_init(&buf->base.base.reference, 1);
return &buf->base;
}
pipe_mutex_unlock(mgr->mutex);
buf = CALLOC_STRUCT(pb_cache_buffer);
if(!buf)
return NULL;
buf->buffer = mgr->provider->create_buffer(mgr->provider, size, desc);
if(!buf->buffer) {
FREE(buf);
return NULL;
}
assert(pipe_is_referenced(&buf->buffer->base.reference));
assert(pb_check_alignment(desc->alignment, buf->buffer->base.alignment));
assert(pb_check_usage(desc->usage, buf->buffer->base.usage));
assert(buf->buffer->base.size >= size);
pipe_reference_init(&buf->base.base.reference, 1);
buf->base.base.alignment = buf->buffer->base.alignment;
buf->base.base.usage = buf->buffer->base.usage;
buf->base.base.size = buf->buffer->base.size;
buf->base.vtbl = &pb_cache_buffer_vtbl;
buf->mgr = mgr;
return &buf->base;
}
