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Merge mysql.com:/nfsdisk1/lars/bkroot/mysql-5.0-rpl

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into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.0-merge
This commit is contained in:
lars/lthalmann@mysql.com/dl145j.mysql.com
2007-01-12 12:22:54 +01:00
parent 49913f2a95 e4c74a6ba4
commit c380de50ef
37 changed files with 3012 additions and 1204 deletions
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39
mysys/my_thr_init.c
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@ -46,6 +46,23 @@ pthread_mutexattr_t my_fast_mutexattr;
pthread_mutexattr_t my_errorcheck_mutexattr;
#endif
#ifdef NPTL_PTHREAD_EXIT_BUG /* see my_pthread.h */
/*
Dummy thread spawned in my_thread_global_init() below to avoid
race conditions in NPTL pthread_exit code.
*/
static
pthread_handler_t nptl_pthread_exit_hack_handler(void *arg)
{
/* Do nothing! */
pthread_exit(0);
return 0;
}
#endif
/*
initialize thread environment
@ -64,6 +81,28 @@ my_bool my_thread_global_init(void)
fprintf(stderr,"Can't initialize threads: error %d\n",errno);
return 1;
}
#ifdef NPTL_PTHREAD_EXIT_BUG
/*
BUG#24507: Race conditions inside current NPTL pthread_exit() implementation.
To avoid a possible segmentation fault during concurrent executions of
pthread_exit(), a dummy thread is spawned which initializes internal variables
of pthread lib. See bug description for thoroughfull explanation.
TODO: Remove this code when fixed versions of glibc6 are in common use.
*/
pthread_t dummy_thread;
pthread_attr_t dummy_thread_attr;
pthread_attr_init(&dummy_thread_attr);
pthread_attr_setdetachstate(&dummy_thread_attr,PTHREAD_CREATE_DETACHED);
pthread_create(&dummy_thread,&dummy_thread_attr,nptl_pthread_exit_hack_handler,NULL);
#endif
#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
/*