pthread_md.h revision 165241
1144518Sdavidxu/*- 2144518Sdavidxu * Copyright (c) 2005 David Xu <davidxu@freebsd.org>. 3144518Sdavidxu * All rights reserved. 4144518Sdavidxu * 5144518Sdavidxu * Redistribution and use in source and binary forms, with or without 6144518Sdavidxu * modification, are permitted provided that the following conditions 7144518Sdavidxu * are met: 8144518Sdavidxu * 9144518Sdavidxu * 1. Redistributions of source code must retain the above copyright 10144518Sdavidxu * notice, this list of conditions and the following disclaimer. 11144518Sdavidxu * 2. Redistributions in binary form must reproduce the above copyright 12144518Sdavidxu * notice, this list of conditions and the following disclaimer in the 13144518Sdavidxu * documentation and/or other materials provided with the distribution. 14144518Sdavidxu * 15144518Sdavidxu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16144518Sdavidxu * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17144518Sdavidxu * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18144518Sdavidxu * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19144518Sdavidxu * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20144518Sdavidxu * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21144518Sdavidxu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22144518Sdavidxu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23144518Sdavidxu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24144518Sdavidxu * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25144518Sdavidxu * 26144518Sdavidxu * $FreeBSD: head/lib/libthr/arch/arm/include/pthread_md.h 165241 2006-12-15 11:52:01Z davidxu $ 27144518Sdavidxu */ 28144518Sdavidxu 29144518Sdavidxu/* 30144518Sdavidxu * Machine-dependent thread prototypes/definitions. 31144518Sdavidxu */ 32144518Sdavidxu#ifndef _PTHREAD_MD_H_ 33144518Sdavidxu#define _PTHREAD_MD_H_ 34144518Sdavidxu 35144518Sdavidxu#include <sys/types.h> 36144518Sdavidxu#include <machine/sysarch.h> 37144518Sdavidxu#include <stddef.h> 38144518Sdavidxu 39165241Sdavidxu#define CPU_SPINWAIT 40144518Sdavidxu#define DTV_OFFSET offsetof(struct tcb, tcb_dtv) 41144518Sdavidxu 42144518Sdavidxu/* 43144518Sdavidxu * Variant II tcb, first two members are required by rtld. 44144518Sdavidxu */ 45144518Sdavidxustruct tcb { 46144518Sdavidxu struct tcb *tcb_self; /* required by rtld */ 47144518Sdavidxu void *tcb_dtv; /* required by rtld */ 48144518Sdavidxu struct pthread *tcb_thread; /* our hook */ 49144518Sdavidxu void *tcb_spare[1]; 50144518Sdavidxu}; 51144518Sdavidxu 52144518Sdavidxu/* 53144518Sdavidxu * The tcb constructors. 54144518Sdavidxu */ 55144518Sdavidxustruct tcb *_tcb_ctor(struct pthread *, int); 56144518Sdavidxuvoid _tcb_dtor(struct tcb *); 57144518Sdavidxu 58144518Sdavidxu/* Called from the thread to set its private data. */ 59144518Sdavidxustatic __inline void 60144518Sdavidxu_tcb_set(struct tcb *tcb) 61144518Sdavidxu{ 62144518Sdavidxu *((struct tcb **)ARM_TP_ADDRESS) = tcb; 63144518Sdavidxu} 64144518Sdavidxu 65144518Sdavidxu/* 66144518Sdavidxu * Get the current tcb. 67144518Sdavidxu */ 68144518Sdavidxustatic __inline struct tcb * 69144518Sdavidxu_tcb_get(void) 70144518Sdavidxu{ 71144518Sdavidxu return (*((struct tcb **)ARM_TP_ADDRESS)); 72144518Sdavidxu} 73144518Sdavidxu 74144518Sdavidxuextern struct pthread *_thr_initial; 75144518Sdavidxu 76144518Sdavidxustatic __inline struct pthread * 77144518Sdavidxu_get_curthread(void) 78144518Sdavidxu{ 79144518Sdavidxu if (_thr_initial) 80144518Sdavidxu return (_tcb_get()->tcb_thread); 81144518Sdavidxu return (NULL); 82144518Sdavidxu} 83144518Sdavidxu 84144518Sdavidxu#endif /* _PTHREAD_MD_H_ */ 85