From 6a1db4ffb67ccb8c3861bb398bff5a033f2d7793 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 9 Jul 1999 14:34:22 +0000 Subject: Update. * elf/rtld.c: Split _dl_start in two pieces to prevent GOT usage before the relocation happened. Patch by Franz Sirl . --- linuxthreads/spinlock.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'linuxthreads/spinlock.c') diff --git a/linuxthreads/spinlock.c b/linuxthreads/spinlock.c index c8f8f71293..ce6ff9e310 100644 --- a/linuxthreads/spinlock.c +++ b/linuxthreads/spinlock.c @@ -27,7 +27,7 @@ 1: fastlock is taken, no thread is waiting on it ADDR: fastlock is taken, ADDR is address of thread descriptor for first waiting thread, other waiting threads are linked via - their p_nextwaiting field. + their p_nextlock field. The waiting list is not sorted by priority order. Actually, we always insert at top of list (sole insertion mode that can be performed without locking). @@ -50,8 +50,10 @@ void internal_function __pthread_lock(struct _pthread_fastlock * lock, self = thread_self(); newstatus = (long) self; } - if (self != NULL) - THREAD_SETMEM(self, p_nextwaiting, (pthread_descr) oldstatus); + if (self != NULL) { + ASSERT(self->p_nextlock == NULL); + THREAD_SETMEM(self, p_nextlock, (pthread_descr) oldstatus); + } } while(! compare_and_swap(&lock->__status, oldstatus, newstatus, &lock->__spinlock)); if (oldstatus != 0) suspend(self); @@ -83,7 +85,7 @@ again: maxptr = ptr; maxprio = thr->p_priority; } - ptr = &(thr->p_nextwaiting); + ptr = &(thr->p_nextlock); thr = *ptr; } /* Remove max prio thread from waiting list. */ @@ -92,16 +94,16 @@ again: to guard against concurrent lock operation */ thr = (pthread_descr) oldstatus; if (! compare_and_swap(&lock->__status, - oldstatus, (long)(thr->p_nextwaiting), + oldstatus, (long)(thr->p_nextlock), &lock->__spinlock)) goto again; } else { /* No risk of concurrent access, remove max prio thread normally */ thr = *maxptr; - *maxptr = thr->p_nextwaiting; + *maxptr = thr->p_nextlock; } /* Wake up the selected waiting thread */ - thr->p_nextwaiting = NULL; + thr->p_nextlock = NULL; restart(thr); } -- cgit v1.2.3