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Diffstat (limited to 'c/src/exec/rtems/src/semcreate.c')
| -rw-r--r-- | c/src/exec/rtems/src/semcreate.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/c/src/exec/rtems/src/semcreate.c b/c/src/exec/rtems/src/semcreate.c deleted file mode 100644 index 5d0fffb575..0000000000 --- a/c/src/exec/rtems/src/semcreate.c +++ /dev/null @@ -1,219 +0,0 @@ -/* - * Semaphore Manager - * - * DESCRIPTION: - * - * This package is the implementation of the Semaphore Manager. - * This manager utilizes standard Dijkstra counting semaphores to provide - * synchronization and mutual exclusion capabilities. - * - * Directives provided are: - * - * + create a semaphore - * + get an ID of a semaphore - * + delete a semaphore - * + acquire a semaphore - * + release a semaphore - * - * COPYRIGHT (c) 1989-1999. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#include <rtems/system.h> -#include <rtems/rtems/status.h> -#include <rtems/rtems/support.h> -#include <rtems/rtems/attr.h> -#include <rtems/score/isr.h> -#include <rtems/score/object.h> -#include <rtems/rtems/options.h> -#include <rtems/rtems/sem.h> -#include <rtems/score/coremutex.h> -#include <rtems/score/coresem.h> -#include <rtems/score/states.h> -#include <rtems/score/thread.h> -#include <rtems/score/threadq.h> -#if defined(RTEMS_MULTIPROCESSING) -#include <rtems/score/mpci.h> -#endif -#include <rtems/score/sysstate.h> - -#include <rtems/score/interr.h> - -/*PAGE - * - * rtems_semaphore_create - * - * This directive creates a semaphore and sets the initial value based - * on the given count. A semaphore id is returned. - * - * Input parameters: - * name - user defined semaphore name - * count - initial count of semaphore - * attribute_set - semaphore attributes - * priority_ceiling - semaphore's ceiling priority - * id - pointer to semaphore id - * - * Output parameters: - * id - semaphore id - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_semaphore_create( - rtems_name name, - unsigned32 count, - rtems_attribute attribute_set, - rtems_task_priority priority_ceiling, - Objects_Id *id -) -{ - register Semaphore_Control *the_semaphore; - CORE_mutex_Attributes the_mutex_attributes; - CORE_semaphore_Attributes the_semaphore_attributes; - unsigned32 lock; - - if ( !rtems_is_name_valid( name ) ) - return RTEMS_INVALID_NAME; - -#if defined(RTEMS_MULTIPROCESSING) - if ( _Attributes_Is_global( attribute_set ) ) { - - if ( !_System_state_Is_multiprocessing ) - return RTEMS_MP_NOT_CONFIGURED; - - if ( _Attributes_Is_inherit_priority( attribute_set ) ) - return RTEMS_NOT_DEFINED; - - } else -#endif - - if ( _Attributes_Is_inherit_priority( attribute_set ) || - _Attributes_Is_priority_ceiling( attribute_set ) ) { - - if ( ! ( (_Attributes_Is_binary_semaphore( attribute_set ) || - _Attributes_Is_simple_binary_semaphore( attribute_set )) && - - _Attributes_Is_priority( attribute_set ) ) ) - return RTEMS_NOT_DEFINED; - - } - - if ( !_Attributes_Is_counting_semaphore( attribute_set ) && ( count > 1 ) ) - return RTEMS_INVALID_NUMBER; - - _Thread_Disable_dispatch(); /* prevents deletion */ - - the_semaphore = _Semaphore_Allocate(); - - if ( !the_semaphore ) { - _Thread_Enable_dispatch(); - return RTEMS_TOO_MANY; - } - -#if defined(RTEMS_MULTIPROCESSING) - if ( _Attributes_Is_global( attribute_set ) && - ! ( _Objects_MP_Allocate_and_open( &_Semaphore_Information, name, - the_semaphore->Object.id, FALSE ) ) ) { - _Semaphore_Free( the_semaphore ); - _Thread_Enable_dispatch(); - return RTEMS_TOO_MANY; - } -#endif - - the_semaphore->attribute_set = attribute_set; - - /* - * If it is not a counting semaphore, then it is either a - * simple binary semaphore or a more powerful mutex style binary - * semaphore. - */ - - if ( !_Attributes_Is_counting_semaphore( attribute_set ) ) { - if ( _Attributes_Is_inherit_priority( attribute_set ) ) - the_mutex_attributes.discipline = CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT; - else if ( _Attributes_Is_priority_ceiling( attribute_set ) ) - the_mutex_attributes.discipline = CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING; - else if ( _Attributes_Is_priority( attribute_set ) ) - the_mutex_attributes.discipline = CORE_MUTEX_DISCIPLINES_PRIORITY; - else - the_mutex_attributes.discipline = CORE_MUTEX_DISCIPLINES_FIFO; - - - if ( _Attributes_Is_binary_semaphore( attribute_set ) ) { - the_mutex_attributes.lock_nesting_behavior = CORE_MUTEX_NESTING_ACQUIRES; - - switch ( the_mutex_attributes.discipline ) { - case CORE_MUTEX_DISCIPLINES_FIFO: - case CORE_MUTEX_DISCIPLINES_PRIORITY: - the_mutex_attributes.only_owner_release = FALSE; - break; - case CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING: - case CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT: - the_mutex_attributes.only_owner_release = TRUE; - break; - } - } else { - the_mutex_attributes.lock_nesting_behavior = CORE_MUTEX_NESTING_BLOCKS; - the_mutex_attributes.only_owner_release = FALSE; - } - - the_mutex_attributes.priority_ceiling = priority_ceiling; - - if ( count == 1 ) - lock = CORE_MUTEX_UNLOCKED; - else - lock = CORE_MUTEX_LOCKED; - - _CORE_mutex_Initialize( - &the_semaphore->Core_control.mutex, - &the_mutex_attributes, - lock - ); - } else { - if ( _Attributes_Is_priority( attribute_set ) ) - the_semaphore_attributes.discipline = CORE_SEMAPHORE_DISCIPLINES_PRIORITY; - else - the_semaphore_attributes.discipline = CORE_SEMAPHORE_DISCIPLINES_FIFO; - - /* - * This effectively disables limit checking. - */ - - the_semaphore_attributes.maximum_count = 0xFFFFFFFF; - - /* - * The following are just to make Purify happy. - */ - - the_mutex_attributes.lock_nesting_behavior = CORE_MUTEX_NESTING_ACQUIRES; - the_mutex_attributes.priority_ceiling = PRIORITY_MINIMUM; - - _CORE_semaphore_Initialize( - &the_semaphore->Core_control.semaphore, - &the_semaphore_attributes, - count - ); - } - - _Objects_Open( &_Semaphore_Information, &the_semaphore->Object, name ); - - *id = the_semaphore->Object.id; - -#if defined(RTEMS_MULTIPROCESSING) - if ( _Attributes_Is_global( attribute_set ) ) - _Semaphore_MP_Send_process_packet( - SEMAPHORE_MP_ANNOUNCE_CREATE, - the_semaphore->Object.id, - name, - 0 /* Not used */ - ); -#endif - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; -} |