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30 lines
635 B
30 lines
635 B
3 years ago
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/*
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* @(#)alpha.gcc 11.1 (Sleepycat) 8/30/99
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*
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* For gcc/alpha, 0 is clear, 1 is set.
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*/
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#ifdef __GNUC__
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#define MUTEX_SET(tsl) ({ \
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register tsl_t *__l = (tsl); \
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int __r; \
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asm volatile( \
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"1: ldl_l %0,%1\n" \
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" blbs %0,2f\n" \
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" mov 1,%0\n" \
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" stl_c %0,%1\n" \
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" bne %0,1b\n" \
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" mb\n" \
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"2:" \
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: "=&r"(__r), "=m"(*__l) : "m"(*__l) : "memory"); \
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__r; \
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})
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#endif
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#ifdef __DECC
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#include <alpha/builtins.h>
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#define MUTEX_SET(tsl) (__LOCK_LONG_RETRY((tsl), 1) != 0)
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#endif
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#define MUTEX_UNSET(tsl) (*(tsl) = 0)
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#define MUTEX_INIT(tsl) MUTEX_UNSET(tsl)
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