diff options
Diffstat (limited to 'nuttx/sched/sem_post.c')
| -rw-r--r-- | nuttx/sched/sem_post.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/nuttx/sched/sem_post.c b/nuttx/sched/sem_post.c index 186c3b87e1..ca20475989 100644 --- a/nuttx/sched/sem_post.c +++ b/nuttx/sched/sem_post.c @@ -1,7 +1,7 @@ /**************************************************************************** * sched/sem_post.c * - * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. + * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <spudmonkey@racsa.co.cr> * * Redistribution and use in source and binary forms, with or without @@ -104,6 +104,9 @@ int sem_post(FAR sem_t *sem) { +#ifdef CONFIG_PRIORITY_INHERITANCE + FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; +#endif FAR _TCB *stcb; STATUS ret = ERROR; irqstate_t saved_state; @@ -122,6 +125,9 @@ int sem_post(FAR sem_t *sem) /* Perform the semaphore unlock operation. */ ASSERT(sem->semcount < SEM_VALUE_MAX); +#ifdef CONFIG_PRIORITY_INHERITANCE + sem->holder = NULL; +#endif sem->semcount++; /* If the result of of semaphore unlock is non-positive, then @@ -151,6 +157,18 @@ int sem_post(FAR sem_t *sem) up_unblock_task(stcb); } } + + /* Check if we need to drop our priority. Our priority could have + * been boosted while we held the semaphore. + */ + +#ifdef CONFIG_PRIORITY_INHERITANCE + if (rtcb->sched_priority != rtcb->base_priority) + { + up_reprioritize_rtr(rtcb, rtcb->base_priority); + } +#endif + ret = OK; /* Interrupts may now be enabled. */ |