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/* PEAK Library |
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* peak/arch/sparc/atomic.h. Generated from atomic.h.in by configure. |
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* |
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* Sun sparc32 atomic operations |
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* |
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* $Id: atomic.h.in,v 1.1 2007/05/24 12:54:10 mbuna Exp $ |
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*/ |
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#ifndef INCLUDED_PEAK_ATOMIC_H_ |
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#define INCLUDED_PEAK_ATOMIC_H_ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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|
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typedef struct { volatile int counter; } peak_atomic_t; |
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|
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#define PEAK_ATOMIC_INIT(i) { (i) } |
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|
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#define peak_atomic_read(v) ((v)->counter) |
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#define peak_atomic_set(v,i) (((v)->counter) = (i)) |
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|
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static void |
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__attribute__ ((unused)) |
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peak_atomic_add(int a, peak_atomic_t *v) |
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{ |
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static unsigned char lock; |
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int tmp; |
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|
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__asm__ __volatile__("1: ldstub [%1], %0\n\t" |
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" cmp %0, 0\n\t" |
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" bne 1b\n\t" |
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" nop" |
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: "=&r" (tmp) |
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: "r" (&lock) |
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: "memory"); |
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v->counter += a; |
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__asm__ __volatile__("stb %%g0, [%0]" |
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: /* no outputs */ |
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: "r" (&lock) |
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: "memory"); |
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} |
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|
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#define peak_atomic_sub(a, v) peak_atomic_add(-a, v) |
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#define peak_atomic_inc(v) peak_atomic_add(1, v) |
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#define peak_atomic_dec(v) peak_atomic_add(-1, v) |
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|
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#endif /* INCLUDED_PEAK_ATOMIC_H_ */ |
