[ http://nagoya.apache.org/jira/browse/XERCESC-481?page=history ]
Alberto Massari updated XERCESC-481:
------------------------------------
Priority: Major
> pthread_mutex_lock is slow on solaris
> -------------------------------------
>
> Key: XERCESC-481
> URL: http://nagoya.apache.org/jira/browse/XERCESC-481
> Project: Xerces-C++
> Type: Bug
> Components: Utilities
> Versions: 1.7.0
> Environment: Operating System: Solaris
> Platform: Sun
> Reporter: Case Larsen
> Assignee: Xerces-C Developers Mailing List
>
> Since this is used a lot in the string pool, it impacts performance. here is a fix
> which we use and it works.
> // this returns old value, so we need to add or subtract value to get true value
> inline int ink_atomic_increment(void *mem, int value)
> {
> volatile int * memp = (int *)mem;
> for (;;) {
> int current = *memp;
> int new_value = current+value;
> asm("cas %2,%3,%0" : "=r" (new_value) : "0" (new_value), "m" (*memp),
> "r" (current));
> if (new_value == current) return current;
> }
> }
> int XMLPlatformUtils::atomicIncrement(int &location)
> {
> return ink_atomic_increment(&location,1) + 1;
> }
> int XMLPlatformUtils::atomicDecrement(int &location)
> {
> return ink_atomic_increment(&location,-1) - 1;
> }
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