From 038d2607ab759638217ded3bd1b232d389975af5 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Sat, 27 Mar 2010 08:58:59 -0600 Subject: mesa: fix deadlock in _mesa_HashFindFreeKeyBlock() Fixes fd.o bug 27340. (cherry picked from commit 8fe3b3f66ae57a1a6eca7f6dcb0455e14ad92075) --- src/mesa/main/hash.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'src') diff --git a/src/mesa/main/hash.c b/src/mesa/main/hash.c index 975775469d..f4af3fdcf7 100644 --- a/src/mesa/main/hash.c +++ b/src/mesa/main/hash.c @@ -127,8 +127,8 @@ _mesa_DeleteHashTable(struct _mesa_HashTable *table) * * \return pointer to user's data or NULL if key not in table */ -void * -_mesa_HashLookup(struct _mesa_HashTable *table, GLuint key) +static INLINE void * +_mesa_HashLookup_unlocked(struct _mesa_HashTable *table, GLuint key) { GLuint pos; const struct HashEntry *entry; @@ -137,19 +137,26 @@ _mesa_HashLookup(struct _mesa_HashTable *table, GLuint key) assert(key); pos = HASH_FUNC(key); - _glthread_LOCK_MUTEX(table->Mutex); entry = table->Table[pos]; while (entry) { if (entry->Key == key) { - _glthread_UNLOCK_MUTEX(table->Mutex); return entry->Data; } entry = entry->Next; } - _glthread_UNLOCK_MUTEX(table->Mutex); return NULL; } +void * +_mesa_HashLookup(struct _mesa_HashTable *table, GLuint key) +{ + void *res; + assert(table); + _glthread_LOCK_MUTEX(table->Mutex); + res = _mesa_HashLookup_unlocked(table, key); + _glthread_UNLOCK_MUTEX(table->Mutex); + return res; +} /** @@ -447,7 +454,7 @@ _mesa_HashFindFreeKeyBlock(struct _mesa_HashTable *table, GLuint numKeys) GLuint freeStart = 1; GLuint key; for (key = 1; key != maxKey; key++) { - if (_mesa_HashLookup(table, key)) { + if (_mesa_HashLookup_unlocked(table, key)) { /* darn, this key is already in use */ freeCount = 0; freeStart = key+1; -- cgit v1.2.3