hcq/MaxScale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Switch bitmask_clear to be locking and offer bitmask_clear_without_spinlock for non-locking version, in response to review comments. Revert poll.c to use bitmask_clear (with locking) and amend dcb.c to use the non-locking version and to take advantage of the return of an indication of whether the whole bitmask is then clearn.

Browse Source
This commit is contained in:
counterpoint
2016-01-08 12:19:29 +00:00
parent 4461cd9398
commit fb5fdb17db
4 changed files with 9 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
server/core/gwbitmask.c
View File

@ -140,14 +140,14 @@ bitmask_set(GWBITMASK *bitmask, int bit)
* Note that this function does not lock the bitmask, but assumes that
* it is under the exclusive control of the caller. If you want to use the
* bitmask spinlock to protect access while clearing the bit, then call
* the alternative bitmask_clear_with_lock.
* the alternative bitmask_clear.
*
* @param bitmask Pointer the bitmask
* @param bit Bit to clear
* @return int 1 if the bitmask is all clear after the operation, else 0.
*/
int
bitmask_clear(GWBITMASK *bitmask, int bit)
bitmask_clear_without_spinlock(GWBITMASK *bitmask, int bit)
{
unsigned char *ptr = bitmask->bits;
int i;
@ -174,19 +174,19 @@ bitmask_clear(GWBITMASK *bitmask, int bit)
/**
* Clear the bit at the specified bit position in the bitmask using a spinlock.
* See bitmask_clear for more details
* See bitmask_clear_without_spinlock for more details
*
* @param bitmask Pointer the bitmask
* @param bit Bit to clear
* @return int 1 if the bitmask is all clear after the operation, else 0
*/
int
bitmask_clear_with_lock(GWBITMASK *bitmask, int bit)
bitmask_clear(GWBITMASK *bitmask, int bit)
{
int result;
spinlock_acquire(&bitmask->lock);
result = bitmask_clear(bitmask, bit);
result = bitmask_clear_without_spinlock(bitmask, bit);
spinlock_release(&bitmask->lock);
return result;
}