X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fgthr-vxworks.h;h=d4da14ef49295674f6dfc9fd87436223764f5f49;hb=54c0191177db8bc27fb599a7d0d7a5866c5046fb;hp=6d51ded2cdadd031c512887d209f6a19a28eef7b;hpb=5483d6d391f65ecc899f7f74ec5d0f3e791530b1;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/gthr-vxworks.h b/gcc/gthr-vxworks.h index 6d51ded2cda..d4da14ef492 100644 --- a/gcc/gthr-vxworks.h +++ b/gcc/gthr-vxworks.h @@ -1,142 +1,169 @@ -/* Threads compatibily routines for libgcc2 for VxWorks. */ +/* Threads compatibility routines for libgcc2 and libobjc for VxWorks. */ /* Compile this one with gcc. */ -/* Copyright (C) 1997 Free Software Foundation, Inc. +/* Copyright (C) 1997, 1999, 2000, 2008, 2009 Free Software Foundation, Inc. Contributed by Mike Stump . -This file is part of GNU CC. +This file is part of GCC. -GNU CC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. -GNU CC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. -You should have received a copy of the GNU General Public License -along with GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. -/* As a special exception, if you link this library with other files, - some of which are compiled with GCC, to produce an executable, - this library does not by itself cause the resulting executable - to be covered by the GNU General Public License. - This exception does not however invalidate any other reasons why - the executable file might be covered by the GNU General Public License. */ +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +. */ -#ifndef __gthr_vxworks_h -#define __gthr_vxworks_h +#ifndef GCC_GTHR_VXWORKS_H +#define GCC_GTHR_VXWORKS_H -/* POSIX threads specific definitions. - Easy, since the interface is just one-to-one mapping. */ +#ifdef _LIBOBJC + +/* libobjc requires the optional pthreads component. */ +#include "gthr-posix.h" + +#else +#ifdef __cplusplus +#define UNUSED(x) +#else +#define UNUSED(x) x __attribute__((unused)) +#endif + +#ifdef __cplusplus +extern "C" { +#endif #define __GTHREADS 1 +#define __gthread_active_p() 1 + +/* Mutexes are easy, except that they need to be initialized at runtime. */ -#include #include -/* typedef void *SEM_ID; */ -typedef int __gthread_key_t; -typedef char __gthread_once_t; typedef SEM_ID __gthread_mutex_t; +/* All VxWorks mutexes are recursive. */ +typedef SEM_ID __gthread_recursive_mutex_t; +#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function +#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function -#define __GTHREAD_MUTEX_INIT 0 -#define __GTHREAD_ONCE_INIT 0 +static inline void +__gthread_mutex_init_function (__gthread_mutex_t *mutex) +{ + *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); +} -#ifndef REG_SAVED_REG static inline int -__gthread_once (__gthread_once_t *once, void (*func) ()) +__gthread_mutex_destroy (__gthread_mutex_t * UNUSED(mutex)) { - (*func)(); return 0; } -extern __gthread_key_t eh_context_key; - -/* This is not the right way to do it, but the semantic of pthreads - don't map well enough onto VxWorks. */ - -static void -__ehdtor (void *pTcb) +static inline int +__gthread_mutex_lock (__gthread_mutex_t *mutex) { - int tid = (int) pTcb; - void *p = (void*)taskVarGet(tid, &eh_context_key); - if (p != (void*)-1) - { - if (p) - free (p); - taskVarSet(tid, &eh_context_key, 0); - } + return semTake (*mutex, WAIT_FOREVER); } -/* This only works for the code in libgcc2.c. */ - static inline int -__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) +__gthread_mutex_trylock (__gthread_mutex_t *mutex) { - *key = 0; - - /* Do this first so that the task variables are visible during the - running of the delete hook. */ - - taskVarInit(); - - /* We don't have a way to track dtor here, so instead, we - register a generic routine that can cleanup any task. */ - - taskDeleteHookAdd (__ehdtor); - - return 0; + return semTake (*mutex, NO_WAIT); } -#define __gthread_setspecific(key, ptr) \ - (key = (int) ptr, 0) - static inline int -__gthread_key_dtor (__gthread_key_t key, void *ptr) +__gthread_mutex_unlock (__gthread_mutex_t *mutex) { - /* Just reset the key value to zero. */ - if (ptr) - return __gthread_setspecific (key, 0); - else - return 0; + return semGive (*mutex); } -#define __gthread_key_delete(key) \ - taskVarDelete (taskIdSelf (), &key) - -#define __gthread_getspecific(key) \ - ((key == 0) \ - ? ((taskVarAdd (taskIdSelf (), &key) != OK) \ - ? (__terminate (), (void*)0) \ - : (void*)0) \ - : (void*)key) -#endif +static inline void +__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) +{ + __gthread_mutex_init_function (mutex); +} static inline int -__gthread_mutex_lock (__gthread_mutex_t *mutex) +__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) { - if (*mutex == 0) - *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); - return semTake (*mutex, WAIT_FOREVER); + return __gthread_mutex_lock (mutex); } static inline int -__gthread_mutex_trylock (__gthread_mutex_t *mutex) +__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) { - if (*mutex == 0) - *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); - return semTake (*mutex, NO_WAIT); + return __gthread_mutex_trylock (mutex); } static inline int -__gthread_mutex_unlock (__gthread_mutex_t *mutex) +__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) { - /* We could return the */ - return semGive (*mutex); + return __gthread_mutex_unlock (mutex); +} + +/* pthread_once is complicated enough that it's implemented + out-of-line. See config/vxlib.c. */ + +typedef struct +{ +#if !defined(__RTP__) +#if defined(__PPC__) + __attribute ((aligned (__alignof (unsigned)))) +#endif + volatile unsigned char busy; +#endif + volatile unsigned char done; +#if !defined(__RTP__) && defined(__PPC__) + /* PPC's test-and-set implementation requires a 4 byte aligned + object, of which it only sets the first byte. We use padding + here, in order to maintain some amount of backwards + compatibility. Without this padding, gthread_once objects worked + by accident because they happen to be static objects and the ppc + port automatically increased their alignment to 4 bytes. */ + unsigned char pad1; + unsigned char pad2; +#endif } +__gthread_once_t; + +#if defined (__RTP__) +# define __GTHREAD_ONCE_INIT { 0 } +#elif defined (__PPC__) +# define __GTHREAD_ONCE_INIT { 0, 0, 0, 0 } +#else +# define __GTHREAD_ONCE_INIT { 0, 0 } +#endif + +extern int __gthread_once (__gthread_once_t *__once, void (*__func)(void)); + +/* Thread-specific data requires a great deal of effort, since VxWorks + is not really set up for it. See config/vxlib.c for the gory + details. All the TSD routines are sufficiently complex that they + need to be implemented out of line. */ + +typedef unsigned int __gthread_key_t; + +extern int __gthread_key_create (__gthread_key_t *__keyp, void (*__dtor)(void *)); +extern int __gthread_key_delete (__gthread_key_t __key); + +extern void *__gthread_getspecific (__gthread_key_t __key); +extern int __gthread_setspecific (__gthread_key_t __key, void *__ptr); + +#undef UNUSED + +#ifdef __cplusplus +} +#endif + +#endif /* not _LIBOBJC */ -#endif /* not __gthr_vxworks_h */ +#endif /* gthr-vxworks.h */