2012-08-16 01:29:06 +02:00
|
|
|
/* pthread_spin_trylock -- trylock a spin lock. Generic version.
|
2015-01-02 17:28:19 +01:00
|
|
|
Copyright (C) 2012-2015 Free Software Foundation, Inc.
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 20:03:42 +01:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
|
|
|
|
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
|
2012-08-16 01:29:06 +02:00
|
|
|
License along with the GNU C Library; if not, see
|
2012-03-10 00:56:38 +01:00
|
|
|
<http://www.gnu.org/licenses/>. */
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 20:03:42 +01:00
|
|
|
|
2008-06-02 03:57:03 +02:00
|
|
|
#include <errno.h>
|
|
|
|
#include <atomic.h>
|
|
|
|
#include "pthreadP.h"
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 20:03:42 +01:00
|
|
|
|
2008-06-02 03:57:03 +02:00
|
|
|
int
|
|
|
|
pthread_spin_trylock (pthread_spinlock_t *lock)
|
|
|
|
{
|
2012-08-16 01:29:06 +02:00
|
|
|
return atomic_exchange_acq (lock, 1) ? EBUSY : 0;
|
2008-06-02 03:57:03 +02:00
|
|
|
}
|