diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-17 15:24:11 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-11-17 15:24:11 +0000 |
commit | 5e96e917578509149814e300d56d2a7d47b7f268 (patch) | |
tree | 9d5057fdaa5b220839a7c7d6c426e207878949fd /c/src/exec/itron/src/ref_mbx.c | |
parent | Corrected spacing. (diff) | |
download | rtems-5e96e917578509149814e300d56d2a7d47b7f268.tar.bz2 |
Updated Mailbox Manager submitted and split into multiple files.
Diffstat (limited to 'c/src/exec/itron/src/ref_mbx.c')
-rw-r--r-- | c/src/exec/itron/src/ref_mbx.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/c/src/exec/itron/src/ref_mbx.c b/c/src/exec/itron/src/ref_mbx.c new file mode 100644 index 0000000000..ac148c89bf --- /dev/null +++ b/c/src/exec/itron/src/ref_mbx.c @@ -0,0 +1,59 @@ +/* + * ITRON 3.0 Mailbox Manager + * + * 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 <itron.h> + +#include <rtems/itron/mbox.h> +#include <rtems/itron/task.h> + +/* + * ref_mbx - Reference Mailbox Status + */ + +ER ref_mbx( + T_RMBX *pk_rmbx, + ID mbxid +) +{ + register ITRON_Mailbox_Control *the_mailbox; + Objects_Locations location; + Chain_Control *pending; + + if ( !pk_rmbx ) + return E_PAR; + + the_mailbox = _ITRON_Mailbox_Get( mbxid, &location ); + switch ( location ) { + case OBJECTS_REMOTE: + case OBJECTS_ERROR: + return _ITRON_Mailbox_Clarify_get_id_error( mbxid ); + + case OBJECTS_LOCAL: + + pending = &the_mailbox->message_queue.Pending_messages; + if ( _Chain_Is_empty( pending ) ) + pk_rmbx->pk_msg = NULL; + else + pk_rmbx->pk_msg = (T_MSG *) pending->first; + + /* + * Fill in whether or not there is a waiting task + */ + + if ( !_Thread_queue_First( &the_mailbox->message_queue.Wait_queue ) ) + pk_rmbx->wtsk = FALSE; + else + pk_rmbx->wtsk = TRUE; + + break; + } + _ITRON_return_errorno( E_OK ); +} + |