From: Keith Packard <keithp@keithp.com>
Date: Wed, 29 Jun 2016 19:52:37 +0000 (-0700)
Subject: altos: Make ao_delay(0) not wait forever
X-Git-Tag: 1.6.5~1^2~10
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=349a63aeed6cdeb89bf18c7b2e2c40782c79cc00

altos: Make ao_delay(0) not wait forever

ao_delay() is implemented on top of ao_sleep_for, and ao_sleep_for
uses the timeout value of 0 to indicate an infinite timeout. Calls to
ao_delay for 0 ticks would unintentionally hit this case and end up
waiting forever.x

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/kernel/ao_task.c b/src/kernel/ao_task.c
index 47352fc1..0a790ccd 100644
--- a/src/kernel/ao_task.c
+++ b/src/kernel/ao_task.c
@@ -504,6 +504,8 @@ static __xdata uint8_t ao_forever;
 void
 ao_delay(uint16_t ticks)
 {
+	if (!ticks)
+		ticks = 1;
 	ao_sleep_for(&ao_forever, ticks);
 }