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-rw-r--r--mysys/my_bitmap.c20
1 files changed, 2 insertions, 18 deletions
diff --git a/mysys/my_bitmap.c b/mysys/my_bitmap.c
index 22199758112..be39ac50731 100644
--- a/mysys/my_bitmap.c
+++ b/mysys/my_bitmap.c
@@ -21,17 +21,13 @@
* the internal size is a set of 32 bit words
* the number of bits specified in creation can be any number > 0
- * there are THREAD safe versions of most calls called bitmap_lock_*
- many of those are not used and not compiled normally but the code
- already exist for them in an #ifdef:ed part. These can only be used
- if THREAD was specified in bitmap_init
TODO:
- Make assembler THREAD safe versions of these using test-and-set instructions
+ Make assembler thread safe versions of these using test-and-set instructions
Original version created by Sergei Golubchik 2001 - 2004.
New version written and test program added and some changes to the interface
- was made by Mikael Ronström 2005, with assistance of Tomas Ulin and Mats
+ was made by Mikael Ronstrom 2005, with assistance of Tomas Ulin and Mats
Kindahl.
*/
@@ -100,18 +96,14 @@ void create_last_word_mask(MY_BITMAP *map)
static inline void bitmap_lock(MY_BITMAP *map __attribute__((unused)))
{
-#ifdef THREAD
if (map->mutex)
mysql_mutex_lock(map->mutex);
-#endif
}
static inline void bitmap_unlock(MY_BITMAP *map __attribute__((unused)))
{
-#ifdef THREAD
if (map->mutex)
mysql_mutex_unlock(map->mutex);
-#endif
}
@@ -123,30 +115,24 @@ my_bool bitmap_init(MY_BITMAP *map, my_bitmap_map *buf, uint n_bits,
{
uint size_in_bytes= bitmap_buffer_size(n_bits);
uint extra= 0;
-#ifdef THREAD
if (thread_safe)
{
size_in_bytes= ALIGN_SIZE(size_in_bytes);
extra= sizeof(mysql_mutex_t);
}
map->mutex= 0;
-#endif
if (!(buf= (my_bitmap_map*) my_malloc(size_in_bytes+extra, MYF(MY_WME))))
DBUG_RETURN(1);
-#ifdef THREAD
if (thread_safe)
{
map->mutex= (mysql_mutex_t *) ((char*) buf + size_in_bytes);
mysql_mutex_init(key_BITMAP_mutex, map->mutex, MY_MUTEX_INIT_FAST);
}
-#endif
}
-#ifdef THREAD
else
{
DBUG_ASSERT(thread_safe == 0);
}
-#endif
map->bitmap= buf;
map->n_bits= n_bits;
@@ -161,10 +147,8 @@ void bitmap_free(MY_BITMAP *map)
DBUG_ENTER("bitmap_free");
if (map->bitmap)
{
-#ifdef THREAD
if (map->mutex)
mysql_mutex_destroy(map->mutex);
-#endif
my_free(map->bitmap);
map->bitmap=0;
}