aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/sparc/sparc32/sem_init.c
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2015-01-31 18:59:40 -0800
committerDavid S. Miller <davem@davemloft.net>2015-01-31 23:39:50 -0800
commitd4abeca50400747402a5a33f3a8aa0941be076d5 (patch)
tree0af10d77c2be123e4592654038d4bc3ac7a5dab5 /sysdeps/sparc/sparc32/sem_init.c
parent5f3d0b78e011d2a72f9e88b0e9ef5bc081d18f97 (diff)
downloadglibc-d4abeca50400747402a5a33f3a8aa0941be076d5.tar
glibc-d4abeca50400747402a5a33f3a8aa0941be076d5.tar.gz
glibc-d4abeca50400747402a5a33f3a8aa0941be076d5.tar.bz2
glibc-d4abeca50400747402a5a33f3a8aa0941be076d5.zip
Fix sparc semaphore implementation after recent changes.
* sysdeps/sparc/nptl/sem_init.c: Delete. * sysdeps/sparc/nptl/sem_post.c: Delete. * sysdeps/sparc/nptl/sem_timedwait.c: Delete. * sysdeps/sparc/nptl/sem_wait.c: Delete. * sysdeps/sparc/sparc32/sem_init.c: New file. * sysdeps/sparc/sparc32/sem_waitcommon.c: New file. * sysdeps/sparc/sparc32/sem_open.c: Generic nptl version with padding explicitly initialized. * sysdeps/sparc/sparc32/sem_post.c: Generic nptl version using padding for in-semaphore spinlock. * sysdeps/sparc/sparc32/sem_wait.c: Likewise. * sysdeps/sparc/sparc32/sem_trywait.c: Delete. * sysdeps/sparc/sparc32/sem_timedwait.c: Delete. * sysdeps/sparc/sparc32/sparcv9/sem_init.c: New file. * sysdeps/sparc/sparc32/sparcv9/sem_open.c: New file. * sysdeps/sparc/sparc32/sparcv9/sem_post.c: New file. * sysdeps/sparc/sparc32/sparcv9/sem_waitcommon.c: New file. * sysdeps/sparc/sparc32/sparcv9/sem_wait.c: Redirect to nptl version. * sysdeps/sparc/sparc32/sparcv9/sem_timedwait.c: Delete. * sysdeps/sparc/sparc32/sparcv9/sem_trywait.c: Delete.
Diffstat (limited to 'sysdeps/sparc/sparc32/sem_init.c')
-rw-r--r--sysdeps/sparc/sparc32/sem_init.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc32/sem_init.c b/sysdeps/sparc/sparc32/sem_init.c
new file mode 100644
index 0000000000..7c46cee900
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sem_init.c
@@ -0,0 +1,95 @@
+/* Copyright (C) 2002-2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <semaphore.h>
+#include <shlib-compat.h>
+#include "semaphoreP.h"
+#include <kernel-features.h>
+
+/* Returns FUTEX_PRIVATE if pshared is zero and private futexes are supported;
+ returns FUTEX_SHARED otherwise.
+ TODO Remove when cleaning up the futex API throughout glibc. */
+static __always_inline int
+futex_private_if_supported (int pshared)
+{
+ if (pshared != 0)
+ return LLL_SHARED;
+#ifdef __ASSUME_PRIVATE_FUTEX
+ return LLL_PRIVATE;
+#else
+ return THREAD_GETMEM (THREAD_SELF, header.private_futex)
+ ^ FUTEX_PRIVATE_FLAG;
+#endif
+}
+
+
+int
+__new_sem_init (sem_t *sem, int pshared, unsigned int value)
+{
+ /* Parameter sanity check. */
+ if (__glibc_unlikely (value > SEM_VALUE_MAX))
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ /* Map to the internal type. */
+ struct new_sem *isem = (struct new_sem *) sem;
+
+ /* Use the values the caller provided. */
+ isem->value = value << SEM_VALUE_SHIFT;
+ isem->pad = 0;
+ isem->nwaiters = 0;
+
+ isem->private = futex_private_if_supported (pshared);
+
+ return 0;
+}
+versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1);
+
+
+
+#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
+int
+attribute_compat_text_section
+__old_sem_init (sem, pshared, value)
+ sem_t *sem;
+ int pshared;
+ unsigned int value;
+{
+ /* Parameter sanity check. */
+ if (__glibc_unlikely (value > SEM_VALUE_MAX))
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ /* Map to the internal type. */
+ struct old_sem *isem = (struct old_sem *) sem;
+
+ /* Use the value the user provided. */
+ isem->value = value;
+
+ /* We cannot store the PSHARED attribute. So we always use the
+ operations needed for shared semaphores. */
+
+ return 0;
+}
+compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0);
+#endif