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2002-04-05 Ulrich Drepper <drepper@redhat.com> * timezone/zic.c: Update from tzcode2002c. * timezone/asia: Update from tzdata2002c. * timezone/backward: Likewise. * timezone/europe: Likewise. * timezone/northamerica: Likewise. * timezone/northamerica: Likewise. * timezone/northamerica: Likewise. * timezone/southamerica: Likewise. * timezone/zone.tab: Likewise.
114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
/* Machine-dependent pthreads configuration and inline functions.
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64 bit S/390 version.
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Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _PT_MACHINE_H
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#define _PT_MACHINE_H 1
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#ifndef PT_EI
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# define PT_EI extern inline
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#endif
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extern long int testandset (int *spinlock);
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extern int __compare_and_swap (long int *p, long int oldval, long int newval);
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/* For multiprocessor systems, we want to ensure all memory accesses
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are completed before we reset a lock. On other systems, we still
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need to make sure that the compiler has flushed everything to memory. */
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#define MEMORY_BARRIER() __asm__ __volatile__ ("bcr 15,0" : : : "memory")
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/* Spinlock implementation; required. */
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PT_EI long int
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testandset (int *spinlock)
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{
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int ret;
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__asm__ __volatile__(
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" la 1,%1\n"
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" lhi 0,1\n"
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" l %0,%1\n"
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"0: cs %0,0,0(1)\n"
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" jl 0b"
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: "=&d" (ret), "+m" (*spinlock)
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: : "0", "1", "cc");
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return ret;
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}
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/* Get some notion of the current stack. Need not be exactly the top
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of the stack, just something somewhere in the current frame. */
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#define CURRENT_STACK_FRAME stack_pointer
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register char * stack_pointer __asm__ ("15");
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/* Return the thread descriptor for the current thread.
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64 bit S/390 uses access register 0 and 1 as "thread register". */
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#define THREAD_SELF ({ \
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register pthread_descr __self; \
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__asm__ (" ear %0,%%a0\n" \
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" sllg %0,%0,32\n" \
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" ear %0,%%a1\n" \
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: "=d" (__self) ); \
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__self; \
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})
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/* Initialize the thread-unique value. */
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#define INIT_THREAD_SELF(descr, nr) ({ \
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__asm__ (" sar %%a1,%0\n" \
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" srlg 0,%0,32\n" \
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" sar %%a0,0\n" \
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: : "d" (descr) : "0" ); \
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})
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/* Access to data in the thread descriptor is easy. */
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#define THREAD_GETMEM(descr, member) THREAD_SELF->member
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#define THREAD_GETMEM_NC(descr, member) THREAD_SELF->member
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#define THREAD_SETMEM(descr, member, value) THREAD_SELF->member = (value)
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#define THREAD_SETMEM_NC(descr, member, value) THREAD_SELF->member = (value)
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/* We want the OS to assign stack addresses. */
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#define FLOATING_STACKS 1
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/* Maximum size of the stack if the rlimit is unlimited. */
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#define ARCH_STACK_MAX_SIZE 8*1024*1024
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/* Compare-and-swap for semaphores. */
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#define HAS_COMPARE_AND_SWAP
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PT_EI int
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__compare_and_swap(long int *p, long int oldval, long int newval)
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{
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int retval;
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__asm__ __volatile__(
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" lgr 0,%2\n"
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" csg 0,%3,%1\n"
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" ipm %0\n"
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" srl %0,28\n"
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"0:"
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: "=&d" (retval), "+m" (*p)
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: "d" (oldval) , "d" (newval)
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: "cc", "0");
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return retval == 0;
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}
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#endif /* pt-machine.h */
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