diff options
Diffstat (limited to '')
| -rw-r--r-- | c/src/exec/posix/src/mutexinit.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/c/src/exec/posix/src/mutexinit.c b/c/src/exec/posix/src/mutexinit.c deleted file mode 100644 index 97882040f9..0000000000 --- a/c/src/exec/posix/src/mutexinit.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * $Id$ - */ - -#if HAVE_CONFIG_H -#include "config.h" -#endif - -#include <assert.h> -#include <errno.h> -#include <pthread.h> - -#include <rtems/system.h> -#include <rtems/score/coremutex.h> -#include <rtems/score/watchdog.h> -#if defined(RTEMS_MULTIPROCESSING) -#include <rtems/score/mpci.h> -#endif -#include <rtems/posix/mutex.h> -#include <rtems/posix/priority.h> -#include <rtems/posix/time.h> - -/*PAGE - * - * 11.3.2 Initializing and Destroying a Mutex, P1003.1c/Draft 10, p. 87 - * - * NOTE: XXX Could be optimized so all the attribute error checking - * is not performed when attr is NULL. - */ - -int pthread_mutex_init( - pthread_mutex_t *mutex, - const pthread_mutexattr_t *attr -) -{ - POSIX_Mutex_Control *the_mutex; - CORE_mutex_Attributes *the_mutex_attr; - const pthread_mutexattr_t *the_attr; - CORE_mutex_Disciplines the_discipline; -#if 0 - register POSIX_Mutex_Control *mutex_in_use; - Objects_Locations location; -#endif - - if ( attr ) the_attr = attr; - else the_attr = &_POSIX_Mutex_Default_attributes; - - /* Check for NULL mutex */ - - if ( !mutex ) - return EINVAL; - - /* - * This code should eventually be removed. - * - * Although the POSIX specification says: - * - * "Attempting to initialize an already initialized mutex results - * in undefined behavior." - * - * Trying to keep the caller from doing the create when *mutex - * is actually a valid ID causes grief. All it takes is the wrong - * value in an uninitialized variable to make this fail. As best - * I can tell, RTEMS was the only pthread implementation to choose - * this option for "undefined behavior" and doing so has created - * portability problems. In particular, Rosimildo DaSilva - * <rdasilva@connecttel.com> saw seemingly random failures in the - * RTEMS port of omniORB2 when this code was enabled. - * - * Joel Sherrill <joel@OARcorp.com> 14 May 1999 - */ - - -#if 0 - /* avoid infinite recursion on call to this routine in _POSIX_Mutex_Get */ - - if ( *mutex != PTHREAD_MUTEX_INITIALIZER ) { - - /* EBUSY if *mutex is a valid id */ - - mutex_in_use = _POSIX_Mutex_Get( mutex, &location ); - switch ( location ) { - case OBJECTS_REMOTE: - case OBJECTS_ERROR: - break; - case OBJECTS_LOCAL: - _Thread_Enable_dispatch(); - return EBUSY; - } - } -#endif - - if ( !the_attr->is_initialized ) - return EINVAL; - - /* - * XXX: Be careful about attributes when global!!! - */ - - assert( the_attr->process_shared == PTHREAD_PROCESS_PRIVATE ); - -#if defined(RTEMS_MULTIPROCESSING) - if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED ) - return POSIX_MP_NOT_IMPLEMENTED(); -#endif - - /* - * Determine the discipline of the mutex - */ - - switch ( the_attr->protocol ) { - case PTHREAD_PRIO_NONE: - the_discipline = CORE_MUTEX_DISCIPLINES_FIFO; - break; - case PTHREAD_PRIO_INHERIT: - the_discipline = CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT; - break; - case PTHREAD_PRIO_PROTECT: - the_discipline = CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING; - break; - default: - return EINVAL; - } - - if ( !_POSIX_Priority_Is_valid( the_attr->prio_ceiling ) ) - return EINVAL; - - _Thread_Disable_dispatch(); - - the_mutex = _POSIX_Mutex_Allocate(); - - if ( !the_mutex ) { - _Thread_Enable_dispatch(); - return EAGAIN; - } - -#if defined(RTEMS_MULTIPROCESSING) - if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED && - !( _Objects_MP_Allocate_and_open( &_POSIX_Mutex_Information, 0, - the_mutex->Object.id, FALSE ) ) ) { - _POSIX_Mutex_Free( the_mutex ); - _Thread_Enable_dispatch(); - return EAGAIN; - } -#endif - - the_mutex->process_shared = the_attr->process_shared; - - the_mutex_attr = &the_mutex->Mutex.Attributes; - - if ( the_attr->recursive ) - the_mutex_attr->lock_nesting_behavior = CORE_MUTEX_NESTING_ACQUIRES; - else - the_mutex_attr->lock_nesting_behavior = CORE_MUTEX_NESTING_IS_ERROR; - the_mutex_attr->only_owner_release = TRUE; - the_mutex_attr->priority_ceiling = - _POSIX_Priority_To_core( the_attr->prio_ceiling ); - the_mutex_attr->discipline = the_discipline; - - /* - * Must be initialized to unlocked. - */ - - _CORE_mutex_Initialize( - &the_mutex->Mutex, - the_mutex_attr, - CORE_MUTEX_UNLOCKED - ); - - _Objects_Open( &_POSIX_Mutex_Information, &the_mutex->Object, 0 ); - - *mutex = the_mutex->Object.id; - -#if defined(RTEMS_MULTIPROCESSING) - if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED ) - _POSIX_Mutex_MP_Send_process_packet( - POSIX_MUTEX_MP_ANNOUNCE_CREATE, - the_mutex->Object.id, - 0, /* Name not used */ - 0 /* Not used */ - ); -#endif - - _Thread_Enable_dispatch(); - return 0; -} |