diff options
Diffstat (limited to 'src/chthreads.c')
| -rw-r--r-- | src/chthreads.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/src/chthreads.c b/src/chthreads.c index 5b80687d6..58f2b46d5 100644 --- a/src/chthreads.c +++ b/src/chthreads.c @@ -189,29 +189,34 @@ Thread *chThdCreateFromMemoryPool(MemoryPool *mp, tprio_t prio, #endif /* CH_USE_DYNAMIC && CH_USE_WAITEXIT && CH_USE_MEMPOOLS */ /** - * @brief Changes the running thread priority then reschedules if necessary. + * @brief Changes the running thread priority level then reschedules if + * necessary. * - * @param newprio the new priority of the running thread + * @param newprio the new priority level of the running thread + * @return The old priority level. + * @note The function returns the real thread priority regardless of the + * actual priority that could be higher than the real priority because + * the priority inheritance mechanism. */ -void chThdSetPriority(tprio_t newprio) { +tprio_t chThdSetPriority(tprio_t newprio) { + tprio_t oldprio; chDbgAssert(newprio <= HIGHPRIO, "chthreads.c, chThdSetPriority()"); chSysLock(); #if CH_USE_MUTEXES - if (currp->p_prio != currp->p_realprio) { - if (newprio > currp->p_prio) - currp->p_prio = newprio; - } - else + oldprio = currp->p_realprio; + if ((currp->p_prio == currp->p_realprio) || (newprio > currp->p_prio)) currp->p_prio = newprio; currp->p_realprio = newprio; #else + oldprio = currp->p_prio; currp->p_prio = newprio; #endif chSchRescheduleS(); chSysUnlock(); + return oldprio; } /** |