diff options
Diffstat (limited to 'kern/sleepq.h')
| -rw-r--r-- | kern/sleepq.h | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/kern/sleepq.h b/kern/sleepq.h index 007e3f2..213925c 100644 --- a/kern/sleepq.h +++ b/kern/sleepq.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017 Richard Braun. + * Copyright (c) 2017-2018 Richard Braun. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -125,25 +125,12 @@ int sleepq_timedwait(struct sleepq *sleepq, const char *wchan, uint64_t ticks); * At least one thread is awaken if any threads are waiting on the sleep * queue. * - * A broadcast differs only by also making all currently waiting threads - * pending for wake-up. As with sleepq_signal, a single thread may be - * awaken. The rationale is to force users to implement "chained waking" - * in order to avoid the thundering herd effect. + * Broadcasting a sleep queue wakes up all waiting threads. */ void sleepq_signal(struct sleepq *sleepq); void sleepq_broadcast(struct sleepq *sleepq); /* - * Wake up a pending thread. - * - * This function may only wake up a thread pending for wake-up after a - * broadcast. It is used to chain wake-ups to avoid the thundering herd - * effect. If there are no threads pending for wake-up, this function - * does nothing. - */ -void sleepq_wakeup(struct sleepq *sleepq); - -/* * This init operation provides : * - sleepq creation * - module fully initialized |