text: /*-
   * Copyright (c) 2003 Jake Burkholder <jake@freebsd.org>.
   * Copyright (c) 2003 Marcel Moolenaar
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * $FreeBSD$
   */
  
  /*
   * Machine-dependent thread prototypes/definitions.
   */
  #ifndef _PTHREAD_MD_H_
  #define	_PTHREAD_MD_H_
  
  #include <stddef.h>
  
  #define	CPU_SPINWAIT
  
  #define	DTV_OFFSET		offsetof(struct tcb, tcb_dtv)
  
  /*
   * Variant II tcb, first two members are required by rtld.
   * %g7 points to the structure.
   */
  struct tcb {
  	struct tcb		*tcb_self;	/* required by rtld */
  	void			*tcb_dtv;	/* required by rtld */
  	struct pthread		*tcb_thread;	/* our hook */
  	void			*tcb_spare[1];
  };
  
  /* Called from the thread to set its private data. */
  static __inline void
  _tcb_set(struct tcb *tcb)
  {
  
  	__asm __volatile("mov %0, %%g7" : : "r" (tcb));
  }
  
  static __inline struct tcb *
  _tcb_get(void)
  {
  	register struct tcb *tp __asm("%g7");
  
  	return (tp);
  }
  
  static __inline struct pthread *
  _get_curthread(void)
  {
  
  	return (_tcb_get()->tcb_thread);
  }
  
  #define HAS__UMTX_OP_ERR	1
  
  #endif /* _PTHREAD_MD_H_ */
  