X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=blobdiff_plain;f=gcc%2Fgthr-vxworks.h;h=d4da14ef49295674f6dfc9fd87436223764f5f49;hp=c85b5e535f37ee1462eb70458b9a0b35ce75167a;hb=f3231e7d248b775b337f8fa56d81b296c03dfd77;hpb=ed6044da464d6dd03a689528ba72082dbb10309f diff --git a/gcc/gthr-vxworks.h b/gcc/gthr-vxworks.h index c85b5e535f3..d4da14ef492 100644 --- a/gcc/gthr-vxworks.h +++ b/gcc/gthr-vxworks.h @@ -1,13 +1,13 @@ /* Threads compatibility routines for libgcc2 and libobjc for VxWorks. */ /* Compile this one with gcc. */ -/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1997, 1999, 2000, 2008, 2009 Free Software Foundation, Inc. Contributed by Mike Stump . This file is part of GCC. 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 2, or (at your option) any later +Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY @@ -15,296 +15,155 @@ 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 GCC; 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 GCC_GTHR_VXWORKS_H #define GCC_GTHR_VXWORKS_H #ifdef _LIBOBJC -/* Thread local storage for a single thread */ -static void *thread_local_storage = NULL; +/* libobjc requires the optional pthreads component. */ +#include "gthr-posix.h" -/* Backend initialization functions */ - -/* Initialize the threads subsystem. */ -int -__gthread_objc_init_thread_system (void) -{ - /* No thread support available */ - return -1; -} - -/* Close the threads subsystem. */ -int -__gthread_objc_close_thread_system (void) -{ - /* No thread support available */ - return -1; -} - -/* Backend thread functions */ - -/* Create a new thread of execution. */ -objc_thread_t -__gthread_objc_thread_detach (void (*func)(void *arg), void *arg) -{ - /* No thread support available */ - return NULL; -} - -/* Set the current thread's priority. */ -int -__gthread_objc_thread_set_priority (int priority) -{ - /* No thread support available */ - return -1; -} - -/* Return the current thread's priority. */ -int -__gthread_objc_thread_get_priority (void) -{ - return OBJC_THREAD_INTERACTIVE_PRIORITY; -} - -/* Yield our process time to another thread. */ -void -__gthread_objc_thread_yield (void) -{ - return; -} - -/* Terminate the current thread. */ -int -__gthread_objc_thread_exit (void) -{ - /* No thread support available */ - /* Should we really exit the program */ - /* exit (&__objc_thread_exit_status); */ - return -1; -} - -/* Returns an integer value which uniquely describes a thread. */ -objc_thread_t -__gthread_objc_thread_id (void) -{ - /* No thread support, use 1. */ - return (objc_thread_t) 1; -} +#else +#ifdef __cplusplus +#define UNUSED(x) +#else +#define UNUSED(x) x __attribute__((unused)) +#endif -/* Sets the thread's local storage pointer. */ -int -__gthread_objc_thread_set_data (void *value) -{ - thread_local_storage = value; - return 0; -} +#ifdef __cplusplus +extern "C" { +#endif -/* Returns the thread's local storage pointer. */ -void * -__gthread_objc_thread_get_data (void) -{ - return thread_local_storage; -} +#define __GTHREADS 1 +#define __gthread_active_p() 1 -/* Backend mutex functions */ +/* Mutexes are easy, except that they need to be initialized at runtime. */ -/* Allocate a mutex. */ -int -__gthread_objc_mutex_allocate (objc_mutex_t mutex) -{ - return 0; -} +#include -/* Deallocate a mutex. */ -int -__gthread_objc_mutex_deallocate (objc_mutex_t mutex) -{ - return 0; -} +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 -/* Grab a lock on a mutex. */ -int -__gthread_objc_mutex_lock (objc_mutex_t mutex) +static inline void +__gthread_mutex_init_function (__gthread_mutex_t *mutex) { - /* There can only be one thread, so we always get the lock */ - return 0; + *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); } -/* Try to grab a lock on a mutex. */ -int -__gthread_objc_mutex_trylock (objc_mutex_t mutex) +static inline int +__gthread_mutex_destroy (__gthread_mutex_t * UNUSED(mutex)) { - /* There can only be one thread, so we always get the lock */ return 0; } -/* Unlock the mutex */ -int -__gthread_objc_mutex_unlock (objc_mutex_t mutex) +static inline int +__gthread_mutex_lock (__gthread_mutex_t *mutex) { - return 0; + return semTake (*mutex, WAIT_FOREVER); } -/* Backend condition mutex functions */ - -/* Allocate a condition. */ -int -__gthread_objc_condition_allocate (objc_condition_t condition) +static inline int +__gthread_mutex_trylock (__gthread_mutex_t *mutex) { - return 0; + return semTake (*mutex, NO_WAIT); } -/* Deallocate a condition. */ -int -__gthread_objc_condition_deallocate (objc_condition_t condition) +static inline int +__gthread_mutex_unlock (__gthread_mutex_t *mutex) { - return 0; + return semGive (*mutex); } -/* Wait on the condition */ -int -__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) +static inline void +__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) { - return 0; + __gthread_mutex_init_function (mutex); } -/* Wake up all threads waiting on this condition. */ -int -__gthread_objc_condition_broadcast (objc_condition_t condition) +static inline int +__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) { - return 0; + return __gthread_mutex_lock (mutex); } -/* Wake up one thread waiting on this condition. */ -int -__gthread_objc_condition_signal (objc_condition_t condition) +static inline int +__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) { - return 0; + return __gthread_mutex_trylock (mutex); } -#else /* _LIBOBJC */ - -/* POSIX threads specific definitions. - Easy, since the interface is just one-to-one mapping. */ - -#define __GTHREADS 1 - -#include -#include -/* typedef void *SEM_ID; */ - -typedef int __gthread_key_t; -typedef char __gthread_once_t; -typedef SEM_ID __gthread_mutex_t; - -#define __GTHREAD_MUTEX_INIT 0 -#define __GTHREAD_ONCE_INIT 0 - -#ifndef REG_SAVED_REG static inline int -__gthread_once (__gthread_once_t *once, void (*func) (void)) +__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) { - (*func)(); - return 0; + return __gthread_mutex_unlock (mutex); } -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. */ +/* pthread_once is complicated enough that it's implemented + out-of-line. See config/vxlib.c. */ -static void -__ehdtor (void *pTcb) +typedef struct { - 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); - } +#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; -/* This only works for the code in libgcc2.c. */ - -static inline int -__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) -{ - *key = 0; +#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 - /* Do this first so that the task variables are visible during the - running of the delete hook. */ +extern int __gthread_once (__gthread_once_t *__once, void (*__func)(void)); - taskVarInit (); +/* 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. */ - /* We don't have a way to track dtor here, so instead, we - register a generic routine that can cleanup any task. */ +typedef unsigned int __gthread_key_t; - taskDeleteHookAdd (__ehdtor); +extern int __gthread_key_create (__gthread_key_t *__keyp, void (*__dtor)(void *)); +extern int __gthread_key_delete (__gthread_key_t __key); - return 0; -} +extern void *__gthread_getspecific (__gthread_key_t __key); +extern int __gthread_setspecific (__gthread_key_t __key, void *__ptr); -#define __gthread_setspecific(key, ptr) \ - (key = (int) ptr, 0) +#undef UNUSED -static inline int -__gthread_key_dtor (__gthread_key_t key, void *ptr) -{ - /* Just reset the key value to zero. */ - if (ptr) - return __gthread_setspecific (key, 0); - else - return 0; +#ifdef __cplusplus } - -#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 int -__gthread_mutex_lock (__gthread_mutex_t *mutex) -{ - if (*mutex == 0) - *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); - return semTake (*mutex, WAIT_FOREVER); -} - -static inline int -__gthread_mutex_trylock (__gthread_mutex_t *mutex) -{ - if (*mutex == 0) - *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); - return semTake (*mutex, NO_WAIT); -} - -static inline int -__gthread_mutex_unlock (__gthread_mutex_t *mutex) -{ - /* We could return the */ - return semGive (*mutex); -} - -#endif /* _LIBOBJC */ +#endif /* not _LIBOBJC */ -#endif /* ! GCC_GTHR_VXWORKS_H */ +#endif /* gthr-vxworks.h */