newlib/winsup/cygwin/winbase.h

#include_next "winbase.h"

#ifndef _WINBASE2_H
#define _WINBASE2_H

extern __inline__ long
ilockincr (long *m)
{
  register int __res;
  __asm__ __volatile__ ("\n\
	movl	$1,%0\n\
	lock	xadd %0,(%1)\n\
	inc	%0\n\
	": "=a" (__res), "=q" (m): "1" (m));
  return __res;
}

extern __inline__ long
ilockdecr (long *m)
{
  register int __res;
  __asm__ __volatile__ ("\n\
	movl	$0xffffffff,%0\n\
	lock	xadd %0,(%1)\n\
	dec	%0\n\
	": "=a" (__res), "=q" (m): "1" (m));
  return __res;
}

extern __inline__ long
ilockexch (long *t, long v)
{
  register int __res;
  __asm__ __volatile__ ("\n\
1:	lock	cmpxchgl %3,(%1)\n\
	jne 1b\n\
 	": "=a" (__res), "=q" (t): "1" (t), "q" (v), "0" (*t));
  return __res;
}

extern __inline__ long
ilockcmpexch (long *t, long v, long c)
{
  register int __res;
  __asm__ __volatile__ ("\n\
	lock cmpxchgl %3,(%1)\n\
	": "=a" (__res), "=q" (t) : "1" (t), "q" (v), "0" (c));
  return __res;
}

#undef InterlockedIncrement
#define InterlockedIncrement ilockincr
#undef InterlockedDecrement
#define InterlockedDecrement ilockdecr
#undef InterlockedExchange
#define InterlockedExchange ilockexch
#undef InterlockedCompareExchange
#define InterlockedCompareExchange ilockcmpexch

#ifndef EXPCGf
#define DECLARE_TLS_STORAGE do {} while (0)
#else
#define DECLARE_TLS_STORAGE char **tls[4096] __attribute__ ((unused))
extern long tls_ix;
extern char * volatile *__stackbase __asm__ ("%fs:4");

extern __inline__ DWORD
my_tlsalloc ()
{
  DWORD n = ilockdecr (&tls_ix);
  __stackbase[tls_ix] = NULL;
  return n;
}

extern __inline__ BOOL
my_tlssetvalue (DWORD ix, void *val)
{
  __stackbase[ix] = (char *) val;
  return 1;
}

extern __inline__ void *
my_tlsgetvalue (DWORD ix)
{
  return __stackbase[ix];
}

extern __inline__ BOOL
my_tlsfree (DWORD ix)
{
  /* nothing for now */
  return 1;
}

#undef TlsAlloc
#define TlsAlloc my_tlsalloc
#undef TlsGetValue
#define TlsGetValue my_tlsgetvalue
#undef TlsSetValue
#define TlsSetValue my_tlssetvalue
#undef TlsFree
#define TlsFree my_tlsfree
#endif /*EXPCGF*/
#endif /*_WINBASE2_H*/