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 #include <stdbool.h> 18 19 #define LOG_TAG "libsuspend" 20 #include <cutils/log.h> 21 22 #include <suspend/autosuspend.h> 23 24 #include "autosuspend_ops.h" 25 26 static struct autosuspend_ops *autosuspend_ops; 27 static bool autosuspend_enabled; 28 static bool autosuspend_inited; 29 autosuspend_init(void)30static int autosuspend_init(void) 31 { 32 if (autosuspend_inited) { 33 return 0; 34 } 35 36 autosuspend_inited = true; 37 38 autosuspend_ops = autosuspend_earlysuspend_init(); 39 if (autosuspend_ops) { 40 goto out; 41 } 42 43 autosuspend_ops = autosuspend_autosleep_init(); 44 if (autosuspend_ops) { 45 goto out; 46 } 47 48 autosuspend_ops = autosuspend_wakeup_count_init(); 49 if (autosuspend_ops) { 50 goto out; 51 } 52 53 if (!autosuspend_ops) { 54 ALOGE("failed to initialize autosuspend\n"); 55 return -1; 56 } 57 58 out: 59 ALOGV("autosuspend initialized\n"); 60 return 0; 61 } 62 autosuspend_enable(void)63int autosuspend_enable(void) 64 { 65 int ret; 66 67 ret = autosuspend_init(); 68 if (ret) { 69 return ret; 70 } 71 72 ALOGV("autosuspend_enable\n"); 73 74 if (autosuspend_enabled) { 75 return 0; 76 } 77 78 ret = autosuspend_ops->enable(); 79 if (ret) { 80 return ret; 81 } 82 83 autosuspend_enabled = true; 84 return 0; 85 } 86 autosuspend_disable(void)87int autosuspend_disable(void) 88 { 89 int ret; 90 91 ret = autosuspend_init(); 92 if (ret) { 93 return ret; 94 } 95 96 ALOGV("autosuspend_disable\n"); 97 98 if (!autosuspend_enabled) { 99 return 0; 100 } 101 102 ret = autosuspend_ops->disable(); 103 if (ret) { 104 return ret; 105 } 106 107 autosuspend_enabled = false; 108 return 0; 109 } 110