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; 28 static bool autosuspend_enabled; 29 static bool autosuspend_inited; 30 31 static int autosuspend_init(void) 32 { 33 if (autosuspend_inited) { 34 return 0; 35 } 36 37 autosuspend_ops = autosuspend_wakeup_count_init(); 38 if (autosuspend_ops) { 39 goto out; 40 } 41 42 if (!autosuspend_ops) { 43 ALOGE("failed to initialize autosuspend\n"); 44 return -1; 45 } 46 47 out: 48 autosuspend_inited = true; 49 50 ALOGV("autosuspend initialized\n"); 51 return 0; 52 } 53 54 int autosuspend_enable(void) 55 { 56 int ret; 57 58 ret = autosuspend_init(); 59 if (ret) { 60 return ret; 61 } 62 63 ALOGV("autosuspend_enable\n"); 64 65 if (autosuspend_enabled) { 66 return 0; 67 } 68 69 ret = autosuspend_ops->enable(); 70 if (ret) { 71 return ret; 72 } 73 74 autosuspend_enabled = true; 75 return 0; 76 } 77 78 int autosuspend_disable(void) 79 { 80 int ret; 81 82 ret = autosuspend_init(); 83 if (ret) { 84 return ret; 85 } 86 87 ALOGV("autosuspend_disable\n"); 88 89 if (!autosuspend_enabled) { 90 return 0; 91 } 92 93 ret = autosuspend_ops->disable(); 94 if (ret) { 95 return ret; 96 } 97 98 autosuspend_enabled = false; 99 return 0; 100 } 101
