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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-10-21 16:44:24 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-10-21 16:44:24 +0000 |
commit | e7264f070e6126bd1a409e82b49f854a8bcb2939 (patch) | |
tree | 22dc2b1dc574824aa97263b7a01638905ebfd0e2 /cpukit/rtems/src | |
parent | Renamed CONFIGURE_POSIX_INIT_TASK_STACK_SIZE to (diff) | |
download | rtems-e7264f070e6126bd1a409e82b49f854a8bcb2939.tar.bz2 |
Added rtems_semaphore_flush directive.
Diffstat (limited to 'cpukit/rtems/src')
-rw-r--r-- | cpukit/rtems/src/semflush.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/cpukit/rtems/src/semflush.c b/cpukit/rtems/src/semflush.c new file mode 100644 index 0000000000..85130998bf --- /dev/null +++ b/cpukit/rtems/src/semflush.c @@ -0,0 +1,93 @@ +/* + * rtems_semaphore_flush + * + * DESCRIPTION: + * + * This package is the implementation of the flush directive + * of the Semaphore Manager. + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * 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_flush + * + * This directive allows a thread to flush the threads + * pending on the semaphore. + * + * Input parameters: + * id - semaphore id + * + * Output parameters: + * RTEMS_SUCCESSFUL - if successful + * error code - if unsuccessful + */ + +rtems_status_code rtems_semaphore_flush( + Objects_Id id +) +{ + register Semaphore_Control *the_semaphore; + Objects_Locations location; + boolean wait; + + the_semaphore = _Semaphore_Get( id, &location ); + switch ( location ) { + + case OBJECTS_REMOTE: +#if defined(RTEMS_MULTIPROCESSING) + _Thread_Dispatch(); + return RTEMS_ILLEGAL_ON_REMOTE_OBJECT; +#endif + + case OBJECTS_ERROR: + return RTEMS_INVALID_ID; + + case OBJECTS_LOCAL: + if ( _Attributes_Is_binary_semaphore(the_semaphore->attribute_set) ) { + _CORE_mutex_Flush( + &the_semaphore->Core_control.mutex, + NULL, + CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT + ); + } else { + _CORE_semaphore_Flush( + &the_semaphore->Core_control.semaphore, + NULL, + CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT + ); + } + return RTEMS_SUCCESSFUL; + } + + return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ +} |