diff options
Diffstat (limited to 'src/sched.c')
| -rw-r--r-- | src/sched.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/sched.c b/src/sched.c index 44cce558..51d159bc 100644 --- a/src/sched.c +++ b/src/sched.c @@ -1,6 +1,6 @@ // Basic scheduling functions and startup/shutdown code. // -// Copyright (C) 2016-2021 Kevin O'Connor <kevin@koconnor.net> +// Copyright (C) 2016-2024 Kevin O'Connor <kevin@koconnor.net> // // This file may be distributed under the terms of the GNU GPLv3 license. @@ -19,7 +19,7 @@ static struct timer periodic_timer, sentinel_timer, deleted_timer; static struct { struct timer *timer_list, *last_insert; - int8_t tasks_status; + int8_t tasks_status, tasks_busy; uint8_t shutdown_status, shutdown_reason; } SchedStatus = {.timer_list = &periodic_timer, .last_insert = &periodic_timer}; @@ -205,11 +205,15 @@ sched_wake_tasks(void) SchedStatus.tasks_status = TS_REQUESTED; } -// Check if tasks need to be run +// Check if tasks busy (called from low-level timer dispatch code) uint8_t -sched_tasks_busy(void) +sched_check_set_tasks_busy(void) { - return SchedStatus.tasks_status >= TS_REQUESTED; + // Return busy if tasks never idle between two consecutive calls + if (SchedStatus.tasks_busy >= TS_REQUESTED) + return 1; + SchedStatus.tasks_busy = SchedStatus.tasks_status; + return 0; } // Note that a task is ready to run @@ -243,7 +247,7 @@ run_tasks(void) irq_disable(); if (SchedStatus.tasks_status != TS_REQUESTED) { // Sleep processor (only run timers) until tasks woken - SchedStatus.tasks_status = TS_IDLE; + SchedStatus.tasks_status = SchedStatus.tasks_busy = TS_IDLE; do { irq_wait(); } while (SchedStatus.tasks_status != TS_REQUESTED); |