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40 lines
856 B
40 lines
856 B
#include <ck_cc.h>
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CK_CC_INLINE static void
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spin_lock(volatile unsigned int *lock)
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{
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#ifdef __x86_64__
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__asm__ __volatile__(
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"\n1:\t"
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"lock ; decl %0\n\t"
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"jns 2f\n"
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"3:\n"
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"rep;nop\n\t"
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"cmpl $0,%0\n\t"
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"jle 3b\n\t"
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"jmp 1b\n"
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"2:\t" : "=m" (*lock) : : "memory");
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#else
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*lock = 1;
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#endif
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return;
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}
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CK_CC_INLINE static void
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spin_unlock(volatile unsigned int *lock)
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{
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#ifdef __x86_64__
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__asm__ __volatile__("movl $1,%0" :"=m" (*lock) :: "memory");
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#else
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*lock = 0;
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return;
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#endif
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}
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#define LOCK_NAME "linux_spinlock"
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#define LOCK_DEFINE volatile unsigned int lock = 1
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#define LOCK spin_lock(&lock)
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#define UNLOCK spin_unlock(&lock)
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