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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [posix/] [src/] [semaphorewaitsupp.c] - Blame information for rev 593

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Line No. Rev Author Line
1 30 unneback
/*
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 *  $Id: semaphorewaitsupp.c,v 1.2 2001-09-27 11:59:17 chris Exp $
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 */
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#include <stdarg.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include <limits.h>
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#include <rtems/system.h>
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#include <rtems/score/object.h>
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#include <rtems/posix/semaphore.h>
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#include <rtems/posix/time.h>
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#include <rtems/posix/seterr.h>
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/*PAGE
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 *
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 *  _POSIX_Semaphore_Wait_support
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 */
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int _POSIX_Semaphore_Wait_support(
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  sem_t              *sem,
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  boolean             blocking,
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  Watchdog_Interval   timeout
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)
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{
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  register POSIX_Semaphore_Control *the_semaphore;
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  Objects_Locations                 location;
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  the_semaphore = _POSIX_Semaphore_Get( sem, &location );
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  switch ( location ) {
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    case OBJECTS_ERROR:
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      set_errno_and_return_minus_one( EINVAL );
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    case OBJECTS_REMOTE:
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      _Thread_Dispatch();
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      set_errno_and_return_minus_one( EINVAL );
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    case OBJECTS_LOCAL:
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      _CORE_semaphore_Seize(
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        &the_semaphore->Semaphore,
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        the_semaphore->Object.id,
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        blocking,
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        timeout
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      );
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      _Thread_Enable_dispatch();
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      switch ( _Thread_Executing->Wait.return_code ) {
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        case CORE_SEMAPHORE_STATUS_SUCCESSFUL:
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          break;
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        case CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT:
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          set_errno_and_return_minus_one( EAGAIN );
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        case CORE_SEMAPHORE_WAS_DELETED:
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          set_errno_and_return_minus_one( EAGAIN );
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        case CORE_SEMAPHORE_TIMEOUT:
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          set_errno_and_return_minus_one( ETIMEDOUT );
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          break;
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        case CORE_SEMAPHORE_MAXIMUM_COUNT_EXCEEDED:
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          /*
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           *  This error can not occur since we set the maximum
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           *  count to the largest value the count can hold.
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           */
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          break;
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      }
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  }
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  return 0;
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}

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