/* * sysdeps/v850/pt-machine.h -- v850-specific pthread definitions * *  Copyright (C) 2002  NEC Electronics Corporation *  Copyright (C) 2002  Miles Bader <miles@gnu.org> * * This file is subject to the terms and conditions of the GNU Lesser * General Public License.  See the file COPYING.LIB in the main * directory of this archive for more details. * * Written by Miles Bader <miles@gnu.org> */#ifndef PT_EI# define PT_EI extern inline#endif/* Get some notion of the current stack.  Need not be exactly the top   of the stack, just something somewhere in the current frame.  */#define CURRENT_STACK_FRAME  __stack_pointerregister char *__stack_pointer __asm__ ("sp");#define HAS_COMPARE_AND_SWAP/* Atomically:  If *PTR == OLD, set *PTR to NEW and return true,   otherwise do nothing and return false.  */PT_EI int__compare_and_swap (long *ptr, long old, long new){  unsigned long psw;  /* disable interrupts  */  __asm__ __volatile__ ("stsr psw, %0; di" : "=&r" (psw));  if (likely (*ptr == old))    {      *ptr = new;      __asm__ __volatile__ ("ldsr %0, psw" :: "r" (psw)); /* re-enable */      return 1;    }  else    {      __asm__ __volatile__ ("ldsr %0, psw" :: "r" (psw)); /* re-enable */      return 0;    }}