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git://sourceware.org/git/newlib-cygwin.git
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94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/* winbase.h
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Copyright 2002, 2003, 2004, 2008, 2012 Red Hat, Inc.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include_next "winbase.h"
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#ifndef _WINBASE2_H
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#define _WINBASE2_H
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/* For some unknown reason, InterlockedAdd is only supported on Itanium
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when using the Windows headers. Fortunately we're not restricted to the
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Windows headers :) */
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extern __inline__ long
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ilockadd (volatile long *m, long value)
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{
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register int __res;
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__asm__ __volatile__ ("\n\
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movl %3,%0\n\
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lock xadd %0,%1\n\
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addl %3,%0\n\
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": "=&r" (__res), "=m" (*m): "m" (*m), "r" (value): "cc");
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return __res;
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}
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extern __inline__ long
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ilockincr (volatile long *m)
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{
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register int __res;
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__asm__ __volatile__ ("\n\
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movl $1,%0\n\
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lock xadd %0,%1\n\
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inc %0\n\
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": "=&r" (__res), "=m" (*m): "m" (*m): "cc");
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return __res;
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}
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extern __inline__ long
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ilockdecr (volatile long *m)
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{
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register int __res;
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__asm__ __volatile__ ("\n\
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movl $0xffffffff,%0\n\
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lock xadd %0,%1\n\
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dec %0\n\
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": "=&r" (__res), "=m" (*m): "m" (*m): "cc");
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return __res;
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}
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extern __inline__ long
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ilockexch (volatile long *t, long v)
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{
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return
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({
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register long ret __asm ("%eax");
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__asm __volatile ("\n"
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"1: lock cmpxchgl %2, %1\n"
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" jne 1b\n"
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: "=a" (ret), "=m" (*t)
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: "r" (v), "m" (*t), "0" (*t)
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: "memory");
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ret;
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});
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}
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extern __inline__ long
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ilockcmpexch (volatile long *t, long v, long c)
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{
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return
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({
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register long ret __asm ("%eax");
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__asm __volatile ("lock cmpxchgl %2, %1"
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: "=a" (ret), "=m" (*t)
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: "r" (v), "m" (*t), "0" (c)
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: "memory");
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ret;
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});
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}
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#undef InterlockedAdd
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#define InterlockedAdd ilockadd
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#undef InterlockedIncrement
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#define InterlockedIncrement ilockincr
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#undef InterlockedDecrement
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#define InterlockedDecrement ilockdecr
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#undef InterlockedExchange
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#define InterlockedExchange ilockexch
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#undef InterlockedCompareExchange
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#define InterlockedCompareExchange ilockcmpexch
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#endif /*_WINBASE2_H*/
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