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release v0.19.14

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Merge tag 'v0.19.14'

release v0.19.14
This commit is contained in:
Max Kellermann 2016-03-18 18:40:42 +01:00
commit e8519fecb4
2 changed files with 13 additions and 11 deletions
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3
NEWS
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@ -52,12 +52,13 @@ ver 0.20 (not yet released)
* update
- apply .mpdignore matches to subdirectories
ver 0.19.14 (not yet released)
ver 0.19.14 (2016/03/18)
* decoder
- dsdiff: fix off-by-one buffer overflow
- opus: limit tag size to 64 kB
* archive
- iso9660: fix buffer overflow
* fix quadratic runtime bug in the tag pool
* fix build failures on non-glibc builds due to constexpr Mutex
ver 0.19.13 (2016/02/23)

21
src/tag/TagPool.cxx
View File

@ -24,19 +24,23 @@
#include "util/VarSize.hxx"
#include "util/StringView.hxx"
#include <limits>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
Mutex tag_pool_lock;
static constexpr size_t NUM_SLOTS = 4096;
static constexpr size_t NUM_SLOTS = 4093;
struct TagPoolSlot {
TagPoolSlot *next;
unsigned char ref;
TagItem item;
static constexpr unsigned MAX_REF = std::numeric_limits<decltype(ref)>::max();
TagPoolSlot(TagPoolSlot *_next, TagType type,
StringView value)
:next(_next), ref(1) {
@ -114,7 +118,7 @@ tag_pool_get_item(TagType type, StringView value)
for (auto slot = *slot_p; slot != nullptr; slot = slot->next) {
if (slot->item.type == type &&
value.Equals(slot->item.value) &&
slot->ref < 0xff) {
slot->ref < TagPoolSlot::MAX_REF) {
assert(slot->ref > 0);
++slot->ref;
return &slot->item;
@ -133,17 +137,14 @@ tag_pool_dup_item(TagItem *item)
assert(slot->ref > 0);
if (slot->ref < 0xff) {
if (slot->ref < TagPoolSlot::MAX_REF) {
++slot->ref;
return item;
} else {
/* the reference counter overflows above 0xff;
duplicate the item, and start with 1 */
auto slot_p = tag_value_slot_p(item->type, item->value);
slot = TagPoolSlot::Create(*slot_p, item->type,
item->value);
*slot_p = slot;
return &slot->item;
/* the reference counter overflows above MAX_REF;
obtain a reference to a different TagPoolSlot which
isn't yet "full" */
return tag_pool_get_item(item->type, item->value);
}
}