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#!/bin/sh
# SPDX-License-Identifier: AGPL-3.0-only
# Copyright 2022 Sxmo Contributors
# include common definitions
# shellcheck source=scripts/core/sxmo_common.sh
. sxmo_common.sh
set -e
last_check=0
wait_can_suspend() {
# If we already checked recently, then there's nothing to do. This helps
# mitigate the chance that running all checks could take too long and
# cause suspend to fail.
if [ "$((last_check + 10))" -gt "$(date +%s)" ]; then
return
fi
sxmo_hook_block_suspend.sh
last_check="$(date +%s)"
}
while true; do
# Reading from wakeup_count blocks until there are no wakelocks
wakeup_count=$(cat /sys/power/wakeup_count)
wait_can_suspend
# If the wakeup count has changed since we read it, this will fail so we
# know to try again. If something takes a wake_lock after we do this, it
# will cause the kernel to abort suspend.
echo "$wakeup_count" > /sys/power/wakeup_count || continue
# If sxmo_suspend failed then we didn't enter suspend, it should be safe
# to retry immediately. There's a delay so we don't eat up all the
# system resoures if the kernel can't suspend.
if ! sxmo_suspend.sh; then
sleep 1
continue
fi
sleep 10
done
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