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 "android_runtime/AndroidRuntime.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 #if defined(HAVE_POSIX_CLOCKS)
64 struct timespec tm;
65
66 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tm);
67
68 return tm.tv_sec * 1000LL + tm.tv_nsec / 1000000;
69 #else
70 struct timeval tv;
71
72 gettimeofday(&tv, NULL);
73 return tv.tv_sec * 1000LL + tv.tv_usec / 1000;
74 #endif
75 }
76
77 /*
78 * native public static long currentThreadTimeMicro();
79 */
android_os_SystemClock_currentThreadTimeMicro(JNIEnv * env,jobject clazz)80 static jlong android_os_SystemClock_currentThreadTimeMicro(JNIEnv* env,
81 jobject clazz)
82 {
83 #if defined(HAVE_POSIX_CLOCKS)
84 struct timespec tm;
85
86 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tm);
87
88 return tm.tv_sec * 1000000LL + tm.tv_nsec / 1000;
89 #else
90 struct timeval tv;
91
92 gettimeofday(&tv, NULL);
93 return tv.tv_sec * 1000000LL + tv.tv_nsec / 1000;
94 #endif
95 }
96
97 /*
98 * native public static long currentTimeMicro();
99 */
android_os_SystemClock_currentTimeMicro(JNIEnv * env,jobject clazz)100 static jlong android_os_SystemClock_currentTimeMicro(JNIEnv* env,
101 jobject clazz)
102 {
103 struct timeval tv;
104
105 gettimeofday(&tv, NULL);
106 return tv.tv_sec * 1000000LL + tv.tv_usec;
107 }
108
109 /*
110 * public static native long elapsedRealtimeNano();
111 */
android_os_SystemClock_elapsedRealtimeNano(JNIEnv * env,jobject clazz)112 static jlong android_os_SystemClock_elapsedRealtimeNano(JNIEnv* env,
113 jobject clazz)
114 {
115 return (jlong)elapsedRealtimeNano();
116 }
117
118 /*
119 * JNI registration.
120 */
121 static JNINativeMethod gMethods[] = {
122 /* name, signature, funcPtr */
123 { "uptimeMillis", "()J",
124 (void*) android_os_SystemClock_uptimeMillis },
125 { "elapsedRealtime", "()J",
126 (void*) android_os_SystemClock_elapsedRealtime },
127 { "currentThreadTimeMillis", "()J",
128 (void*) android_os_SystemClock_currentThreadTimeMillis },
129 { "currentThreadTimeMicro", "()J",
130 (void*) android_os_SystemClock_currentThreadTimeMicro },
131 { "currentTimeMicro", "()J",
132 (void*) android_os_SystemClock_currentTimeMicro },
133 { "elapsedRealtimeNanos", "()J",
134 (void*) android_os_SystemClock_elapsedRealtimeNano },
135 };
register_android_os_SystemClock(JNIEnv * env)136 int register_android_os_SystemClock(JNIEnv* env)
137 {
138 return AndroidRuntime::registerNativeMethods(env,
139 "android/os/SystemClock", gMethods, NELEM(gMethods));
140 }
141
142 }; // namespace android
143
144