The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* //device/libs/android_runtime/android_server_AlarmManagerService.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #define LOG_TAG "AlarmManagerService" |
| 19 | |
| 20 | #include "JNIHelp.h" |
| 21 | #include "jni.h" |
| 22 | #include "utils/Log.h" |
| 23 | #include "utils/misc.h" |
| 24 | |
| 25 | #include <fcntl.h> |
| 26 | #include <stdio.h> |
| 27 | #include <string.h> |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/socket.h> |
| 30 | #include <arpa/inet.h> |
| 31 | #include <netinet/in.h> |
| 32 | #include <stdlib.h> |
| 33 | #include <errno.h> |
| 34 | #include <unistd.h> |
| 35 | |
| 36 | #if HAVE_ANDROID_OS |
| 37 | #include <linux/ioctl.h> |
| 38 | #include <linux/android_alarm.h> |
| 39 | #endif |
| 40 | |
| 41 | #define ONE_NANOSECOND 1000000000LL |
| 42 | #define NANOSECONDS_TO_SECONDS(x) (x / ONE_NANOSECOND) |
| 43 | #define SECONDS_TO_NANOSECONDS(x) (x * ONE_NANOSECOND) |
| 44 | |
| 45 | namespace android { |
| 46 | |
| 47 | static jint android_server_AlarmManagerService_setKernelTimezone(JNIEnv* env, jobject obj, jint fd, jint minswest) |
| 48 | { |
| 49 | #if HAVE_ANDROID_OS |
| 50 | struct timezone tz; |
| 51 | |
| 52 | tz.tz_minuteswest = minswest; |
| 53 | tz.tz_dsttime = 0; |
| 54 | |
| 55 | int result = settimeofday(NULL, &tz); |
| 56 | if (result < 0) { |
| 57 | LOGE("Unable to set kernel timezone to %d: %s\n", minswest, strerror(errno)); |
| 58 | return -1; |
| 59 | } else { |
| 60 | LOGD("Kernel timezone updated to %d minutes west of GMT\n", minswest); |
| 61 | } |
| 62 | |
| 63 | return 0; |
| 64 | #else |
| 65 | return -ENOSYS; |
| 66 | #endif |
| 67 | } |
| 68 | |
| 69 | static jint android_server_AlarmManagerService_init(JNIEnv* env, jobject obj) |
| 70 | { |
| 71 | #if HAVE_ANDROID_OS |
| 72 | return open("/dev/alarm", O_RDWR); |
| 73 | #else |
| 74 | return -1; |
| 75 | #endif |
| 76 | } |
| 77 | |
| 78 | static void android_server_AlarmManagerService_close(JNIEnv* env, jobject obj, jint fd) |
| 79 | { |
| 80 | #if HAVE_ANDROID_OS |
| 81 | close(fd); |
| 82 | #endif |
| 83 | } |
| 84 | |
| 85 | static void android_server_AlarmManagerService_set(JNIEnv* env, jobject obj, jint fd, jint type, jlong nanoseconds) |
| 86 | { |
| 87 | #if HAVE_ANDROID_OS |
| 88 | struct timespec ts; |
| 89 | ts.tv_sec = NANOSECONDS_TO_SECONDS(nanoseconds); |
| 90 | ts.tv_nsec = nanoseconds - SECONDS_TO_NANOSECONDS(ts.tv_sec); |
| 91 | |
| 92 | int result = ioctl(fd, ANDROID_ALARM_SET(type), &ts); |
| 93 | if (result < 0) |
| 94 | { |
| 95 | LOGE("Unable to set alarm to %lld: %s\n", nanoseconds, strerror(errno)); |
| 96 | } |
| 97 | #endif |
| 98 | } |
| 99 | |
| 100 | static jint android_server_AlarmManagerService_waitForAlarm(JNIEnv* env, jobject obj, jint fd) |
| 101 | { |
| 102 | #if HAVE_ANDROID_OS |
| 103 | int result = 0; |
| 104 | |
| 105 | do |
| 106 | { |
| 107 | result = ioctl(fd, ANDROID_ALARM_WAIT); |
| 108 | } while (result < 0 && errno == EINTR); |
| 109 | |
| 110 | if (result < 0) |
| 111 | { |
| 112 | LOGE("Unable to wait on alarm: %s\n", strerror(errno)); |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | return result; |
| 117 | #endif |
| 118 | } |
| 119 | |
| 120 | static JNINativeMethod sMethods[] = { |
| 121 | /* name, signature, funcPtr */ |
| 122 | {"init", "()I", (void*)android_server_AlarmManagerService_init}, |
| 123 | {"close", "(I)V", (void*)android_server_AlarmManagerService_close}, |
| 124 | {"set", "(IIJ)V", (void*)android_server_AlarmManagerService_set}, |
| 125 | {"waitForAlarm", "(I)I", (void*)android_server_AlarmManagerService_waitForAlarm}, |
| 126 | {"setKernelTimezone", "(II)I", (void*)android_server_AlarmManagerService_setKernelTimezone}, |
| 127 | }; |
| 128 | |
| 129 | int register_android_server_AlarmManagerService(JNIEnv* env) |
| 130 | { |
| 131 | jclass clazz = env->FindClass("com/android/server/AlarmManagerService"); |
| 132 | |
| 133 | if (clazz == NULL) |
| 134 | { |
| 135 | LOGE("Can't find com/android/server/AlarmManagerService"); |
| 136 | return -1; |
| 137 | } |
| 138 | |
| 139 | return jniRegisterNativeMethods(env, "com/android/server/AlarmManagerService", |
| 140 | sMethods, NELEM(sMethods)); |
| 141 | } |
| 142 | |
| 143 | } /* namespace android */ |