aboutsummaryrefslogtreecommitdiff
path: root/nptl/pthread_mutex_init.c
diff options
context:
space:
mode:
Diffstat (limited to 'nptl/pthread_mutex_init.c')
-rw-r--r--nptl/pthread_mutex_init.c81
1 files changed, 3 insertions, 78 deletions
diff --git a/nptl/pthread_mutex_init.c b/nptl/pthread_mutex_init.c
index 96f1fb00f8..074941daf3 100644
--- a/nptl/pthread_mutex_init.c
+++ b/nptl/pthread_mutex_init.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -18,10 +18,10 @@
02111-1307 USA. */
#include <assert.h>
-#include <errno.h>
#include <string.h>
#include "pthreadP.h"
+
static const struct pthread_mutexattr default_attr =
{
/* Default is a normal mutex, not shared between processes. */
@@ -29,11 +29,6 @@ static const struct pthread_mutexattr default_attr =
};
-#ifndef __ASSUME_FUTEX_LOCK_PI
-static int tpi_supported;
-#endif
-
-
int
__pthread_mutex_init (mutex, mutexattr)
pthread_mutex_t *mutex;
@@ -45,87 +40,17 @@ __pthread_mutex_init (mutex, mutexattr)
imutexattr = (const struct pthread_mutexattr *) mutexattr ?: &default_attr;
- /* Sanity checks. */
- 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_FUTEX_LOCK_PI
- if (__builtin_expect (tpi_supported == 0, 0))
- {
- int lock = 0;
- INTERNAL_SYSCALL_DECL (err);
- int ret = INTERNAL_SYSCALL (futex, err, 4, &lock, FUTEX_UNLOCK_PI,
- 0, 0);
- assert (INTERNAL_SYSCALL_ERROR_P (ret, err));
- tpi_supported = INTERNAL_SYSCALL_ERRNO (ret, err) == ENOSYS ? -1 : 1;
- }
- if (__builtin_expect (tpi_supported < 0, 0))
- return ENOTSUP;
-#endif
- break;
-
- default:
- /* XXX: For now we don't support robust priority protected mutexes. */
- if (imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_ROBUST)
- return ENOTSUP;
- break;
- }
-
/* Clear the whole variable. */
memset (mutex, '\0', __SIZEOF_PTHREAD_MUTEX_T);
/* Copy the values from the attribute. */
- mutex->__data.__kind = imutexattr->mutexkind & ~PTHREAD_MUTEXATTR_FLAG_BITS;
-
- if ((imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_ROBUST) != 0)
- {
-#ifndef __ASSUME_SET_ROBUST_LIST
- if ((imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_PSHARED) != 0
- && __set_robust_list_avail < 0)
- return ENOTSUP;
-#endif
-
- mutex->__data.__kind |= PTHREAD_MUTEX_ROBUST_NORMAL_NP;
- }
-
- switch (imutexattr->mutexkind & PTHREAD_MUTEXATTR_PROTOCOL_MASK)
- {
- case PTHREAD_PRIO_INHERIT << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
- mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_INHERIT_NP;
- break;
-
- case PTHREAD_PRIO_PROTECT << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
- mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_PROTECT_NP;
-
- int ceiling = (imutexattr->mutexkind
- & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
- >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT;
- if (! ceiling)
- {
- if (__sched_fifo_min_prio == -1)
- __init_sched_fifo_prio ();
- if (ceiling < __sched_fifo_min_prio)
- ceiling = __sched_fifo_min_prio;
- }
- mutex->__data.__lock = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
- break;
-
- default:
- break;
- }
+ mutex->__data.__kind = imutexattr->mutexkind & ~0x80000000;
/* Default values: mutex not used yet. */
// mutex->__count = 0; already done by memset
// mutex->__owner = 0; already done by memset
// mutex->__nusers = 0; already done by memset
// mutex->__spins = 0; already done by memset
- // mutex->__next = NULL; already done by memset
return 0;
}