X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fgthr-vxworks.h;h=0f3ad23412ad6c81e8cad6fc3859c55883c38e9d;hb=e551bd1a627721943b25c270a38b7f3e7df8f647;hp=1474853edb319378cc7d6e898c5c4f763635ba62;hpb=5a54c45ed5c603e6fc35b444d37d52b6f076d5d2;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/gthr-vxworks.h b/gcc/gthr-vxworks.h index 1474853edb3..0f3ad23412a 100644 --- a/gcc/gthr-vxworks.h +++ b/gcc/gthr-vxworks.h @@ -32,279 +32,99 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #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 */ +#else -/* 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; -} - -/* Sets the thread's local storage pointer. */ -int -__gthread_objc_thread_set_data(void *value) -{ - thread_local_storage = value; - return 0; -} - -/* Returns the thread's local storage pointer. */ -void * -__gthread_objc_thread_get_data(void) -{ - return thread_local_storage; -} - -/* Backend mutex functions */ - -/* Allocate a mutex. */ -int -__gthread_objc_mutex_allocate(objc_mutex_t mutex) -{ - return 0; -} - -/* Deallocate a mutex. */ -int -__gthread_objc_mutex_deallocate(objc_mutex_t mutex) -{ - return 0; -} +#define __GTHREADS 1 +#define __gthread_active_p() 1 -/* Grab a lock on a mutex. */ -int -__gthread_objc_mutex_lock(objc_mutex_t mutex) -{ - /* There can only be one thread, so we always get the lock */ - return 0; -} +/* Mutexes are easy, except that they need to be initialized at runtime. */ -/* Try to grab a lock on a mutex. */ -int -__gthread_objc_mutex_trylock(objc_mutex_t 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) -{ - return 0; -} +#include -/* Backend condition mutex functions */ +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 -/* Allocate a condition. */ -int -__gthread_objc_condition_allocate(objc_condition_t condition) +static inline void +__gthread_mutex_init_function (__gthread_mutex_t *mutex) { - return 0; + *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); } -/* Deallocate a condition. */ -int -__gthread_objc_condition_deallocate(objc_condition_t condition) +static inline int +__gthread_mutex_lock (__gthread_mutex_t *mutex) { - return 0; + return semTake (*mutex, WAIT_FOREVER); } -/* Wait on the condition */ -int -__gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex) +static inline int +__gthread_mutex_trylock (__gthread_mutex_t *mutex) { - return 0; + return semTake (*mutex, NO_WAIT); } -/* Wake up all threads waiting on this condition. */ -int -__gthread_objc_condition_broadcast(objc_condition_t condition) +static inline int +__gthread_mutex_unlock (__gthread_mutex_t *mutex) { - return 0; + return semGive (*mutex); } -/* Wake up one thread waiting on this condition. */ -int -__gthread_objc_condition_signal(objc_condition_t condition) +static inline void +__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) { - return 0; + __gthread_mutex_init_function (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_lock (__gthread_recursive_mutex_t *mutex) { - (*func)(); - return 0; + return __gthread_mutex_lock (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. */ - -static void -__ehdtor (void *pTcb) +static inline int +__gthread_recursive_mutex_trylock (__gthread_recursive_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 __gthread_mutex_trylock (mutex); } -/* This only works for the code in libgcc2.c. */ - static inline int -__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) +__gthread_recursive_mutex_unlock (__gthread_recursive_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 __gthread_mutex_unlock (mutex); } -#define __gthread_setspecific(key, ptr) \ - (key = (int) ptr, 0) +/* pthread_once is complicated enough that it's implemented + out-of-line. See config/vxlib.c. */ -static inline int -__gthread_key_dtor (__gthread_key_t key, void *ptr) +typedef struct { - /* Just reset the key value to zero. */ - if (ptr) - return __gthread_setspecific (key, 0); - else - return 0; + volatile unsigned char busy; + volatile unsigned char done; } +__gthread_once_t; -#define __gthread_key_delete(key) \ - taskVarDelete (taskIdSelf (), &key) +#define __GTHREAD_ONCE_INIT { 0, 0 } -#define __gthread_getspecific(key) \ - ((key == 0) \ - ? ((taskVarAdd (taskIdSelf (), &key) != OK) \ - ? (__terminate (), (void*)0) \ - : (void*)0) \ - : (void*)key) -#endif +extern int __gthread_once (__gthread_once_t *once, void (*func)(void)); -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); -} +/* 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. */ -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); -} +typedef unsigned int __gthread_key_t; -static inline int -__gthread_mutex_unlock (__gthread_mutex_t *mutex) -{ - /* We could return the */ - return semGive (*mutex); -} +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); -#endif /* _LIBOBJC */ +#endif /* not _LIBOBJC */ -#endif /* ! GCC_GTHR_VXWORKS_H */ +#endif /* gthr-vxworks.h */