archive/blender-archive
Archived
1
1
Fork 0
Code Pull Requests Packages Activity

Fix T74662: Prefetching causes random crashes

Browse Source 
Caused by 18b693bdbd, due to lack of thread safety.
Beteween calling BKE_sequencer_cache_get_num_items and BKE_sequencer_cache_iterate
New items could be inserted in the cache.

BKE_sequencer_cache_iterate() now use 2 callbcack functions for initial setup
during which buffers with correct length can be initialized and finally iterating.

Additionally drawing of unselected items was fixed again introduced in 18b693bdbd.

T74662 is reporting quite different symptoms, than I get on my machine, so I am not
entirely sure this is complete fix.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7220
This commit is contained in:
Richard Antalik
2020-03-25 00:23:06 +01:00
parent e1c7549ac9
commit 188ccfb0dd
3 changed files with 95 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
source/blender/blenkernel/intern/seqcache.c
View File

@@ -1401,24 +1401,11 @@ void BKE_sequencer_cache_put(const SeqRenderData *context,
}
}
size_t BKE_sequencer_cache_get_num_items(struct Scene *scene)
{
SeqCache *cache = seq_cache_get_from_scene(scene);
if (!cache) {
return 0;
}
seq_cache_lock(scene);
size_t num_items = BLI_ghash_len(cache->hash);
seq_cache_unlock(scene);
return num_items;
}
void BKE_sequencer_cache_iterate(
struct Scene *scene,
void *userdata,
bool callback(void *userdata, struct Sequence *seq, int nfra, int cache_type, float cost))
bool callback_init(void *userdata, size_t item_count),
bool callback_iter(void *userdata, struct Sequence *seq, int nfra, int cache_type, float cost))
{
SeqCache *cache = seq_cache_get_from_scene(scene);
if (!cache) {
@@ -1426,15 +1413,16 @@ void BKE_sequencer_cache_iterate(
}
seq_cache_lock(scene);
bool interrupt = callback_init(userdata, BLI_ghash_len(cache->hash));
GHashIterator gh_iter;
BLI_ghashIterator_init(&gh_iter, cache->hash);
bool interrupt = false;
while (!BLI_ghashIterator_done(&gh_iter) && !interrupt) {
SeqCacheKey *key = BLI_ghashIterator_getKey(&gh_iter);
BLI_ghashIterator_step(&gh_iter);
interrupt = callback(userdata, key->seq, key->nfra, key->type, key->cost);
interrupt = callback_iter(userdata, key->seq, key->nfra, key->type, key->cost);
}
cache->last_key = NULL;