aboutsummaryrefslogtreecommitdiff
path: root/nptl/pthread_mutex_init.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2006-07-01 07:31:09 +0000
committerUlrich Drepper <drepper@redhat.com>2006-07-01 07:31:09 +0000
commitf3be81a91cdd1b42c47e4d8501dd96d0f1666520 (patch)
tree4ad4148cace87d6859d64572be37ee6ba96fc5b8 /nptl/pthread_mutex_init.c
parent361a3706e1a353d587127eab967a229c20177808 (diff)
downloadglibc-f3be81a91cdd1b42c47e4d8501dd96d0f1666520.tar
glibc-f3be81a91cdd1b42c47e4d8501dd96d0f1666520.tar.gz
glibc-f3be81a91cdd1b42c47e4d8501dd96d0f1666520.tar.bz2
glibc-f3be81a91cdd1b42c47e4d8501dd96d0f1666520.zip
* pthread_mutex_init.c (__pthread_mutex_init): Move some
computations to compile time.
Diffstat (limited to 'nptl/pthread_mutex_init.c')
-rw-r--r--nptl/pthread_mutex_init.c37
1 files changed, 26 insertions, 11 deletions
diff --git a/nptl/pthread_mutex_init.c b/nptl/pthread_mutex_init.c
index c25e4035e5..6ffa30d5c0 100644
--- a/nptl/pthread_mutex_init.c
+++ b/nptl/pthread_mutex_init.c
@@ -41,11 +41,25 @@ __pthread_mutex_init (mutex, mutexattr)
imutexattr = (const struct pthread_mutexattr *) mutexattr ?: &default_attr;
/* Sanity checks. */
- // XXX For now we don't support priority inherited or priority protected
- // XXX mutexes.
- if ((imutexattr->mutexkind & PTHREAD_MUTEXATTR_PROTOCOL_MASK)
- != (PTHREAD_PRIO_NONE << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT))
- return ENOTSUP;
+ // XXX For now we don't support priority protected mutexes.
+ switch (__builtin_expect (imutexattr->mutexkind
+ & PTHREAD_MUTEXATTR_PROTOCOL_MASK,
+ PTHREAD_PRIO_NONE
+ << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT))
+ {
+ case PTHREAD_PRIO_NONE << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
+ break;
+
+ case PTHREAD_PRIO_INHERIT << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
+#ifndef __ASSUME_SET_ROBUST_LIST
+ if (__set_robust_list_avail < 0)
+ return ENOTSUP;
+#endif
+ break;
+
+ default:
+ return ENOTSUP;
+ }
/* Clear the whole variable. */
memset (mutex, '\0', __SIZEOF_PTHREAD_MUTEX_T);
@@ -64,14 +78,14 @@ __pthread_mutex_init (mutex, mutexattr)
mutex->__data.__kind |= PTHREAD_MUTEX_ROBUST_NORMAL_NP;
}
- switch ((imutexattr->mutexkind & PTHREAD_MUTEXATTR_PROTOCOL_MASK)
- >> PTHREAD_MUTEXATTR_PROTOCOL_SHIFT)
+ switch (imutexattr->mutexkind & PTHREAD_MUTEXATTR_PROTOCOL_MASK)
{
- case PTHREAD_PRIO_INHERIT:
- mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_INHERIT_PRIVATE_NP;
+ case PTHREAD_PRIO_INHERIT << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
+ mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_INHERIT_NP;
break;
- case PTHREAD_PRIO_PROTECT:
- mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_PROTECT_PRIVATE_NP;
+
+ case PTHREAD_PRIO_PROTECT << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
+ mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_PROTECT_NP;
if (PTHREAD_MUTEX_PRIO_CEILING_MASK
== PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
mutex->__data.__kind |= (imutexattr->mutexkind
@@ -82,6 +96,7 @@ __pthread_mutex_init (mutex, mutexattr)
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT)
<< PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
break;
+
default:
break;
}