diff options
Diffstat (limited to 'cpukit/score/include/rtems/score/coresem.h')
| -rw-r--r-- | cpukit/score/include/rtems/score/coresem.h | 38 |
1 files changed, 32 insertions, 6 deletions
diff --git a/cpukit/score/include/rtems/score/coresem.h b/cpukit/score/include/rtems/score/coresem.h index 7445151ecd..a146b1c1c2 100644 --- a/cpukit/score/include/rtems/score/coresem.h +++ b/cpukit/score/include/rtems/score/coresem.h @@ -82,7 +82,14 @@ typedef enum { /** This status indicates that an attempt was made to unlock the semaphore * and this would have made its count greater than that allowed. */ - CORE_SEMAPHORE_MAXIMUM_COUNT_EXCEEDED + CORE_SEMAPHORE_MAXIMUM_COUNT_EXCEEDED, + /** This status indicates that the semaphore was not immediately + * available and the caller passed a bad timeout value to the API + * routine. In this case, the API required that the validity check + * for the timeout occur after the check that the semaphore was immediately + * available. + */ + CORE_SEMAPHORE_BAD_TIMEOUT_VALUE } CORE_semaphore_Status; /** @@ -116,6 +123,25 @@ typedef struct { } CORE_semaphore_Control; /** + * The following enumerated type is the set of blocking options + * available to seize operation. + */ +typedef enum { + /** This value indicates that the caller does not wish to block. */ + CORE_SEMAPHORE_NO_WAIT, + /** This value indicates that the caller is willing to block forever. */ + CORE_SEMAPHORE_BLOCK_FOREVER, + /** This value indicates that the caller is blocking with a timeout. */ + CORE_SEMAPHORE_BLOCK_WITH_TIMEOUT, + /** This value indicates that the caller wanted to block but passed in + * a bad timeout value to the API. Unfortunately, this is a weird case + * where the timeout bad error is required to be generated only if + * the semaphore is not available. + */ + CORE_SEMAPHORE_BAD_TIMEOUT +} Core_semaphore_Blocking_option; + +/** * This routine initializes the semaphore based on the parameters passed. * * @param[in] the_semaphore is the semaphore to initialize @@ -137,15 +163,15 @@ void _CORE_semaphore_Initialize( * @param[in] the_semaphore is the semaphore to seize * @param[in] id is the Id of the API level Semaphore object associated * with this instance of a SuperCore Semaphore - * @param[in] wait is TRUE if the calling thread is willing to wait + * @param[in] wait is the blocking mode * @param[in] timeout is the number of ticks the calling thread is willing * to wait if @a wait is TRUE. */ void _CORE_semaphore_Seize( - CORE_semaphore_Control *the_semaphore, - Objects_Id id, - boolean wait, - Watchdog_Interval timeout + CORE_semaphore_Control *the_semaphore, + Objects_Id id, + Core_semaphore_Blocking_option wait, + Watchdog_Interval timeout ); /** |