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- /* Machine-dependent pthreads configuration and inline functions.
- Sparc v9 version.
- Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Richard Henderson <rth@tamu.edu>.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc.,
- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
- #ifndef PT_EI
- # define PT_EI extern inline
- #endif
- /* Spinlock implementation; required. */
- PT_EI int
- testandset (int *spinlock)
- {
- int ret;
- __asm__ __volatile__("ldstub %1,%0"
- : "=r"(ret), "=m"(*spinlock) : "m"(*spinlock));
- return ret;
- }
- /* Get some notion of the current stack. Need not be exactly the top
- of the stack, just something somewhere in the current frame. */
- #define CURRENT_STACK_FRAME stack_pointer
- register char *stack_pointer __asm__ ("%sp");
- /* Registers %g6 and %g7 are reserved by the ABI for "system use". It
- happens that Solaris uses %g6 for the thread pointer -- we do the same. */
- struct _pthread_descr_struct;
- register struct _pthread_descr_struct *__thread_self __asm__("%g6");
- /* Return the thread descriptor for the current thread. */
- #define THREAD_SELF __thread_self
- /* Initialize the thread-unique value. */
- #define INIT_THREAD_SELF(descr, nr) (__thread_self = (descr))
- /* Compare-and-swap for semaphores. */
- #define HAS_COMPARE_AND_SWAP
- PT_EI int
- __compare_and_swap (long int *p, long int oldval, long int newval)
- {
- long int readval;
- __asm__ __volatile__ ("casx [%4], %2, %0"
- : "=r"(readval), "=m"(*p)
- : "r"(oldval), "m"(*p), "r"(p), "0"(newval));
- return readval == oldval;
- }
- /* Access to data in the thread descriptor is easy. */
- #define THREAD_GETMEM(descr, member) __thread_self->member
- #define THREAD_GETMEM_NC(descr, member) __thread_self->member
- #define THREAD_SETMEM(descr, member, value) __thread_self->member = (value)
- #define THREAD_SETMEM_NC(descr, member, value) __thread_self->member = (value)
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