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#include <linux/ioctl.h>
36#include <linux/android_alarm.h>
37
38namespace android {
39
40static jint android_server_AlarmManagerService_setKernelTimezone(JNIEnv* env, jobject obj, jint fd, jint minswest)
41{
42    struct timezone tz;
43
44    tz.tz_minuteswest = minswest;
45    tz.tz_dsttime = 0;
46
47    int result = settimeofday(NULL, &tz);
48    if (result < 0) {
49        LOGE("Unable to set kernel timezone to %d: %s\n", minswest, strerror(errno));
50        return -1;
51    } else {
52        LOGD("Kernel timezone updated to %d minutes west of GMT\n", minswest);
53    }
54
55    return 0;
56}
57
58static jint android_server_AlarmManagerService_init(JNIEnv* env, jobject obj)
59{
60    return open("/dev/alarm", O_RDWR);
61}
62
63static void android_server_AlarmManagerService_close(JNIEnv* env, jobject obj, jint fd)
64{
65	close(fd);
66}
67
68static void android_server_AlarmManagerService_set(JNIEnv* env, jobject obj, jint fd, jint type, jlong seconds, jlong nanoseconds)
69{
70    struct timespec ts;
71    ts.tv_sec = seconds;
72    ts.tv_nsec = nanoseconds;
73
74	int result = ioctl(fd, ANDROID_ALARM_SET(type), &ts);
75	if (result < 0)
76	{
77        LOGE("Unable to set alarm to %lld.%09lld: %s\n", seconds, nanoseconds, strerror(errno));
78    }
79}
80
81static jint android_server_AlarmManagerService_waitForAlarm(JNIEnv* env, jobject obj, jint fd)
82{
83	int result = 0;
84
85	do
86	{
87		result = ioctl(fd, ANDROID_ALARM_WAIT);
88	} while (result < 0 && errno == EINTR);
89
90	if (result < 0)
91	{
92        LOGE("Unable to wait on alarm: %s\n", strerror(errno));
93        return 0;
94    }
95
96    return result;
97}
98
99static JNINativeMethod sMethods[] = {
100     /* name, signature, funcPtr */
101	{"init", "()I", (void*)android_server_AlarmManagerService_init},
102	{"close", "(I)V", (void*)android_server_AlarmManagerService_close},
103	{"set", "(IIJJ)V", (void*)android_server_AlarmManagerService_set},
104    {"waitForAlarm", "(I)I", (void*)android_server_AlarmManagerService_waitForAlarm},
105    {"setKernelTimezone", "(II)I", (void*)android_server_AlarmManagerService_setKernelTimezone},
106};
107
108int register_android_server_AlarmManagerService(JNIEnv* env)
109{
110    return jniRegisterNativeMethods(env, "com/android/server/AlarmManagerService",
111                                    sMethods, NELEM(sMethods));
112}
113
114} /* namespace android */
115