10b149f18f
This CL implements a simple force_suspend(). This function takes a timeoutMs argument that is currently ignored. It also uses a two-stage init process that spawns the suspend_thread when autosuspend is in use. Follow-up CLs will: - Implement file locking to prevent multiple libsuspend instances from starting multiple suspend threads in the system. - Fully implement timout for force_suspend. - Integrate force_suspend with suspend_thred. Bug: 70669809 Test: autosuspend still works Change-Id: I6b2c72d0c61d1bec6db0f0b28481ffe0e20ec615
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LIBSUSPEND_AUTOSUSPEND_H_
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#define _LIBSUSPEND_AUTOSUSPEND_H_
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#include <sys/cdefs.h>
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#include <stdbool.h>
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__BEGIN_DECLS
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/*
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* autosuspend_enable
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*
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* Turn on autosuspend in the kernel, allowing it to enter suspend if no
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* wakelocks/wakeup_sources are held.
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*
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*
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*
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* Returns 0 on success, -1 if autosuspend was not enabled.
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*/
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int autosuspend_enable(void);
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/*
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* autosuspend_disable
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*
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* Turn off autosuspend in the kernel, preventing suspend and synchronizing
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* with any in-progress resume.
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*
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* Returns 0 on success, -1 if autosuspend was not disabled.
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*/
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int autosuspend_disable(void);
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/*
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* force_suspend
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*
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* Forces suspend to happen. timeout_ms is used to give system a chance to suspend gracefully.
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* When timeout expires, suspend will be forced via mem --> /sys/power/state. timeout_ms of 0
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* will force suspend immediately.
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*
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* Returns 0 if system suspended, -1 if suspend did not occur.
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*/
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int autosuspend_force_suspend(int timeout_ms);
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/*
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* set_wakeup_callback
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*
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* Set a function to be called each time the device returns from suspend.
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* success is true if the suspend was sucessful and false if the suspend
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* aborted due to some reason.
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*/
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void autosuspend_set_wakeup_callback(void (*func)(bool success));
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__END_DECLS
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#endif
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