diff options
Diffstat (limited to 'contrib/gcc/gthr-vxworks.h')
-rw-r--r-- | contrib/gcc/gthr-vxworks.h | 285 |
1 files changed, 39 insertions, 246 deletions
diff --git a/contrib/gcc/gthr-vxworks.h b/contrib/gcc/gthr-vxworks.h index c85b5e5..4fb3b09 100644 --- a/contrib/gcc/gthr-vxworks.h +++ b/contrib/gcc/gthr-vxworks.h @@ -32,279 +32,72 @@ 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 */ - -/* 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; -} - -/* 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; -} - -/* 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; -} - -/* Backend condition mutex functions */ - -/* Allocate a condition. */ -int -__gthread_objc_condition_allocate (objc_condition_t condition) -{ - return 0; -} - -/* Deallocate a condition. */ -int -__gthread_objc_condition_deallocate (objc_condition_t condition) -{ - return 0; -} - -/* Wait on the condition */ -int -__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) -{ - return 0; -} - -/* Wake up all threads waiting on this condition. */ -int -__gthread_objc_condition_broadcast (objc_condition_t condition) -{ - return 0; -} - -/* Wake up one thread waiting on this condition. */ -int -__gthread_objc_condition_signal (objc_condition_t condition) -{ - return 0; -} - -#else /* _LIBOBJC */ - -/* POSIX threads specific definitions. - Easy, since the interface is just one-to-one mapping. */ +#else #define __GTHREADS 1 +#define __gthread_active_p() 1 + +/* Mutexes are easy, except that they need to be initialized at runtime. */ -#include <vxWorks.h> #include <semLib.h> -/* typedef void *SEM_ID; */ -typedef int __gthread_key_t; -typedef char __gthread_once_t; typedef SEM_ID __gthread_mutex_t; +#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function -#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)) -{ - (*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) -{ - 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); - } -} - -/* This only works for the code in libgcc2.c. */ - -static inline int -__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) +static inline void +__gthread_mutex_init_function (__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; + *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); } -#define __gthread_setspecific(key, ptr) \ - (key = (int) ptr, 0) - -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; -} - -#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 */ +/* pthread_once is complicated enough that it's implemented + out-of-line. See config/vxlib.c. */ + +typedef struct +{ + volatile unsigned char busy; + volatile unsigned char done; +} +__gthread_once_t; + +#define __GTHREAD_ONCE_INIT { 0, 0 } + +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); + +#endif /* not _LIBOBJC */ -#endif /* ! GCC_GTHR_VXWORKS_H */ +#endif /* gthr-vxworks.h */ |