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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "libsuspend"
     18 
     19 #include <stdbool.h>
     20 
     21 #include <log/log.h>
     22 
     23 #include <suspend/autosuspend.h>
     24 
     25 #include "autosuspend_ops.h"
     26 
     27 static struct autosuspend_ops* autosuspend_ops = NULL;
     28 static bool autosuspend_enabled;
     29 
     30 static int autosuspend_init(void) {
     31     if (autosuspend_ops != NULL) {
     32         return 0;
     33     }
     34 
     35     autosuspend_ops = autosuspend_wakeup_count_init();
     36     if (autosuspend_ops == NULL) {
     37         ALOGE("failed to initialize autosuspend");
     38         return -1;
     39     }
     40 
     41     ALOGV("autosuspend initialized");
     42     return 0;
     43 }
     44 
     45 int autosuspend_enable(void) {
     46     int ret;
     47 
     48     ret = autosuspend_init();
     49     if (ret) {
     50         return ret;
     51     }
     52 
     53     ALOGV("autosuspend_enable");
     54 
     55     if (autosuspend_enabled) {
     56         return 0;
     57     }
     58 
     59     ret = autosuspend_ops->enable();
     60     if (ret) {
     61         return ret;
     62     }
     63 
     64     autosuspend_enabled = true;
     65     return 0;
     66 }
     67 
     68 int autosuspend_disable(void) {
     69     int ret;
     70 
     71     ret = autosuspend_init();
     72     if (ret) {
     73         return ret;
     74     }
     75 
     76     ALOGV("autosuspend_disable");
     77 
     78     if (!autosuspend_enabled) {
     79         return 0;
     80     }
     81 
     82     ret = autosuspend_ops->disable();
     83     if (ret) {
     84         return ret;
     85     }
     86 
     87     autosuspend_enabled = false;
     88     return 0;
     89 }
     90 
     91 int autosuspend_force_suspend(int timeout_ms) {
     92     int ret;
     93 
     94     ret = autosuspend_init();
     95     if (ret) {
     96         return ret;
     97     }
     98 
     99     ALOGV("autosuspend_force_suspend");
    100 
    101     return autosuspend_ops->force_suspend(timeout_ms);
    102 }
    103 
    104 void autosuspend_set_wakeup_callback(void (*func)(bool success)) {
    105     int ret;
    106 
    107     ret = autosuspend_init();
    108     if (ret) {
    109         return;
    110     }
    111 
    112     ALOGV("set_wakeup_callback");
    113 
    114     autosuspend_ops->set_wakeup_callback(func);
    115 }
    116