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Change ResourceLoader::load to make it more thread safe.

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This commit is contained in:
Juan Linietsky 2018-09-02 13:59:33 -03:00
parent 8af9d1fc03
commit 19d57894d8
1 changed files with 25 additions and 5 deletions
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30
core/io/resource_loader.cpp
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@ -202,12 +202,32 @@ RES ResourceLoader::load(const String &p_path, const String &p_type_hint, bool p
else else
local_path = ProjectSettings::get_singleton()->localize_path(p_path); local_path = ProjectSettings::get_singleton()->localize_path(p_path);
if (!p_no_cache && ResourceCache::has(local_path)) { if (!p_no_cache) {
//lock first if possible
if (ResourceCache::lock) {
ResourceCache::lock->read_lock();
}
print_verbose("Loading resource: " + local_path + " (cached)"); //get ptr
if (r_error) Resource **rptr = ResourceCache::resources.getptr(local_path);
*r_error = OK;
return RES(ResourceCache::get(local_path)); if (rptr) {
RES res(*rptr);
//it is possible this resource was just freed in a thread. If so, this referencing will not work and resource is considered not cached
if (res.is_valid()) {
//referencing is fine
if (r_error)
*r_error = OK;
if (ResourceCache::lock) {
ResourceCache::lock->read_unlock();
}
print_verbose("Loading resource: " + local_path + " (cached)");
return res;
}
}
if (ResourceCache::lock) {
ResourceCache::lock->read_unlock();
}
} }
bool xl_remapped = false; bool xl_remapped = false;