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
37 namespace android {
38
39 /*
40 * native public static long uptimeMillis();
41 */
android_os_SystemClock_uptimeMillis(JNIEnv * env,jobject clazz)42 static 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 */
android_os_SystemClock_elapsedRealtime(JNIEnv * env,jobject clazz)51 static 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 */
android_os_SystemClock_currentThreadTimeMillis(JNIEnv * env,jobject clazz)60 static 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 */
android_os_SystemClock_currentThreadTimeMicro(JNIEnv * env,jobject clazz)73 static 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 */
android_os_SystemClock_currentTimeMicro(JNIEnv * env,jobject clazz)86 static 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 */
android_os_SystemClock_elapsedRealtimeNano(JNIEnv * env,jobject clazz)98 static jlong android_os_SystemClock_elapsedRealtimeNano(JNIEnv* env,
99 jobject clazz)
100 {
101 return (jlong)elapsedRealtimeNano();
102 }
103
104 /*
105 * JNI registration.
106 */
107 static 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 };
register_android_os_SystemClock(JNIEnv * env)122 int register_android_os_SystemClock(JNIEnv* env)
123 {
124 return RegisterMethodsOrDie(env, "android/os/SystemClock", gMethods, NELEM(gMethods));
125 }
126
127 }; // namespace android
128
129