1/*
2 * Copyright (C) 2008 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
18/*
19 * System clock functions.
20 */
21
22#include <sys/time.h>
23#include <limits.h>
24#include <fcntl.h>
25#include <errno.h>
26#include <string.h>
27
28#include "JNIHelp.h"
29#include "jni.h"
30#include "core_jni_helpers.h"
31
32#include <sys/time.h>
33#include <time.h>
34
35#include <utils/SystemClock.h>
36
37namespace android {
38
39/*
40 * native public static long uptimeMillis();
41 */
42static jlong android_os_SystemClock_uptimeMillis(JNIEnv* env,
43        jobject clazz)
44{
45    return (jlong)uptimeMillis();
46}
47
48/*
49 * native public static long elapsedRealtime();
50 */
51static jlong android_os_SystemClock_elapsedRealtime(JNIEnv* env,
52        jobject clazz)
53{
54    return (jlong)elapsedRealtime();
55}
56
57/*
58 * native public static long currentThreadTimeMillis();
59 */
60static jlong android_os_SystemClock_currentThreadTimeMillis(JNIEnv* env,
61        jobject clazz)
62{
63    struct timespec tm;
64
65    clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tm);
66
67    return tm.tv_sec * 1000LL + tm.tv_nsec / 1000000;
68}
69
70/*
71 * native public static long currentThreadTimeMicro();
72 */
73static jlong android_os_SystemClock_currentThreadTimeMicro(JNIEnv* env,
74        jobject clazz)
75{
76    struct timespec tm;
77
78    clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tm);
79
80    return tm.tv_sec * 1000000LL + tm.tv_nsec / 1000;
81}
82
83/*
84 * native public static long currentTimeMicro();
85 */
86static jlong android_os_SystemClock_currentTimeMicro(JNIEnv* env,
87        jobject clazz)
88{
89    struct timeval tv;
90
91    gettimeofday(&tv, NULL);
92    return tv.tv_sec * 1000000LL + tv.tv_usec;
93}
94
95/*
96 * public static native long elapsedRealtimeNano();
97 */
98static jlong android_os_SystemClock_elapsedRealtimeNano(JNIEnv* env,
99        jobject clazz)
100{
101    return (jlong)elapsedRealtimeNano();
102}
103
104/*
105 * JNI registration.
106 */
107static const JNINativeMethod gMethods[] = {
108    /* name, signature, funcPtr */
109    { "uptimeMillis",      "()J",
110            (void*) android_os_SystemClock_uptimeMillis },
111    { "elapsedRealtime",      "()J",
112            (void*) android_os_SystemClock_elapsedRealtime },
113    { "currentThreadTimeMillis",      "()J",
114            (void*) android_os_SystemClock_currentThreadTimeMillis },
115    { "currentThreadTimeMicro",       "()J",
116            (void*) android_os_SystemClock_currentThreadTimeMicro },
117    { "currentTimeMicro",             "()J",
118            (void*) android_os_SystemClock_currentTimeMicro },
119    { "elapsedRealtimeNanos",      "()J",
120            (void*) android_os_SystemClock_elapsedRealtimeNano },
121};
122int register_android_os_SystemClock(JNIEnv* env)
123{
124    return RegisterMethodsOrDie(env, "android/os/SystemClock", gMethods, NELEM(gMethods));
125}
126
127}; // namespace android
128
129