Return to atomic.h CVS log

Up to [local] / sys / arch / sparc64 / include

Annotation of sys/arch/sparc64/include/atomic.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: atomic.h,v 1.3 2007/03/13 08:34:03 art Exp $  */
        !             2: /*
        !             3:  * Copyright (c) 2007 Artur Grabowski <art@openbsd.org>
        !             4:  *
        !             5:  * Permission to use, copy, modify, and distribute this software for any
        !             6:  * purpose with or without fee is hereby granted, provided that the above
        !             7:  * copyright notice and this permission notice appear in all copies.
        !             8:  *
        !             9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            16:  */
        !            17:
        !            18: #ifndef _SPARC64_ATOMIC_H_
        !            19: #define _SPARC64_ATOMIC_H_
        !            20:
        !            21: #if defined(_KERNEL)
        !            22:
        !            23: static __inline unsigned int
        !            24: sparc64_casa(volatile unsigned int *uip, unsigned int expect, unsigned int new)
        !            25: {
        !            26:        __asm __volatile("casa [%2] %3, %4, %0"
        !            27:            : "+r" (new), "=m" (*uip)
        !            28:            : "r" (uip), "n" (ASI_N), "r" (expect), "m" (*uip));
        !            29:
        !            30:        return (new);
        !            31: }
        !            32:
        !            33: static __inline void
        !            34: atomic_setbits_int(volatile unsigned int *uip, unsigned int v)
        !            35: {
        !            36:        volatile unsigned int e, r;
        !            37:
        !            38:        r = *uip;
        !            39:        do {
        !            40:                e = r;
        !            41:                r = sparc64_casa(uip, e, e | v);
        !            42:        } while (r != e);
        !            43: }
        !            44:
        !            45: static __inline void
        !            46: atomic_clearbits_int(volatile unsigned int *uip, unsigned int v)
        !            47: {
        !            48:        volatile unsigned int e, r;
        !            49:
        !            50:        r = *uip;
        !            51:        do {
        !            52:                e = r;
        !            53:                r = sparc64_casa(uip, e, e & ~v);
        !            54:        } while (r != e);
        !            55: }
        !            56:
        !            57: #endif /* defined(_KERNEL) */
        !            58: #endif /* _SPARC64_ATOMIC_H_ */