[Bf-blender-cvs] [451d5cef0f4] master: Fix part II of T53977: Severe problem with multiple instances of a library (save and reload).
Bastien Montagne
noreply at git.blender.org
Fri Feb 16 10:45:47 CET 2018
Commit: 451d5cef0f419921351e392676aa6d8a44b4cfc3
Author: Bastien Montagne
Date: Fri Feb 16 10:31:03 2018 +0100
Branches: master
https://developer.blender.org/rB451d5cef0f419921351e392676aa6d8a44b4cfc3
Fix part II of T53977: Severe problem with multiple instances of a library (save and reload).
Once 'losing lib' issue is fixed (in previous commit), we have new issue
that this could lead to several copies of the same linked data-block in
.blend file. Which is not good. At all.
So had to add a GHash-based check in libraries reading code to ensure we
only load a same ID from a same lib once.
===================================================================
M source/blender/blenloader/intern/readfile.c
===================================================================
diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index f45ff677ae3..d6868e67fc7 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -10472,6 +10472,7 @@ static void read_libraries(FileData *basefd, ListBase *mainlist)
Main *mainl = mainlist->first;
Main *mainptr;
ListBase *lbarray[MAX_LIBARRAY];
+ GHash *loaded_ids = BLI_ghash_str_new(__func__);
int a;
bool do_it = true;
@@ -10485,7 +10486,7 @@ static void read_libraries(FileData *basefd, ListBase *mainlist)
mainptr= mainl->next;
while (mainptr) {
if (mainvar_id_tag_any_check(mainptr, LIB_TAG_READ)) {
- // printf("found LIB_TAG_READ %s\n", mainptr->curlib->name);
+ // printf("found LIB_TAG_READ %s (%s)\n", mainptr->curlib->id.name, mainptr->curlib->name);
FileData *fd = mainptr->curlib->filedata;
@@ -10583,25 +10584,38 @@ static void read_libraries(FileData *basefd, ListBase *mainlist)
a = set_listbasepointers(mainptr, lbarray);
while (a--) {
ID *id = lbarray[a]->first;
+ ListBase pending_free_ids = {NULL};
while (id) {
ID *idn = id->next;
if (id->tag & LIB_TAG_READ) {
- ID *realid = NULL;
BLI_remlink(lbarray[a], id);
- link_id_part(basefd->reports, fd, mainptr, id, &realid);
+ /* When playing with lib renaming and such, you may end with cases where you have
+ * more than one linked ID of the same data-block from same library.
+ * This is absolutely horrible, hence we use a ghash to ensure we go back to a single
+ * linked data when loading the file... */
+ ID **realid = NULL;
+ if (!BLI_ghash_ensure_p(loaded_ids, id->name, (void ***)&realid)) {
+ link_id_part(basefd->reports, fd, mainptr, id, realid);
+ }
/* realid shall never be NULL - unless some source file/lib is broken
* (known case: some directly linked shapekey from a missing lib...). */
- /* BLI_assert(realid != NULL); */
+ /* BLI_assert(*realid != NULL); */
- change_idid_adr(mainlist, basefd, id, realid);
+ change_idid_adr(mainlist, basefd, id, *realid);
- MEM_freeN(id);
+ /* We cannot free old lib-ref placeholder ID here anymore, since we use its name
+ * as key in loaded_ids hass. */
+ BLI_addtail(&pending_free_ids, id);
}
id = idn;
}
+
+ /* Clear GHash and free all lib-ref placeholders IDs of that type now. */
+ BLI_ghash_clear(loaded_ids, NULL, NULL);
+ BLI_freelistN(&pending_free_ids);
}
BLO_expand_main(fd, mainptr);
}
@@ -10609,7 +10623,10 @@ static void read_libraries(FileData *basefd, ListBase *mainlist)
mainptr = mainptr->next;
}
}
-
+
+ BLI_ghash_free(loaded_ids, NULL, NULL);
+ loaded_ids = NULL;
+
/* test if there are unread libblocks */
/* XXX This code block is kept for 2.77, until we are sure it never gets reached anymore. Can be removed later. */
for (mainptr = mainl->next; mainptr; mainptr = mainptr->next) {
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