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Annotation of sys/arch/m68k/include/atomic.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: atomic.h,v 1.3 2007/03/21 05:28:20 miod Exp $ */
                      2:
                      3: /* Public Domain */
                      4:
                      5: #ifndef __M68K_ATOMIC_H__
                      6: #define __M68K_ATOMIC_H__
                      7:
                      8: #if defined(_KERNEL)
                      9:
                     10: static __inline void
                     11: atomic_setbits_int(__volatile unsigned int *uip, unsigned int v)
                     12: {
                     13:        unsigned int witness, old, new;
                     14:
                     15:        do {
                     16:                witness = old = *uip;
                     17:                new = old | v;
                     18:                __asm__ __volatile__ (
                     19:                        "casl %0, %2, %1" : "+d"(old), "=m"(*uip) : "d"(new));
                     20:        } while (old != witness);
                     21: }
                     22:
                     23: static __inline void
                     24: atomic_clearbits_int(__volatile unsigned int *uip, unsigned int v)
                     25: {
                     26:        unsigned int witness, old, new;
                     27:
                     28:        do {
                     29:                witness = old = *uip;
                     30:                new = old & ~v;
                     31:                __asm__ __volatile__ (
                     32:                        "casl %0, %2, %1" : "+d"(old), "=m"(*uip) : "d"(new));
                     33:        } while (old != witness);
                     34: }
                     35:
                     36: #endif /* defined(_KERNEL) */
                     37: #endif /* __M68K_ATOMIC_H__ */