1 /*
2 * Copyright (C) 2007 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 #define LOG_TAG "SQLiteDebug"
18
19 #include <jni.h>
20 #include <JNIHelp.h>
21 #include <android_runtime/AndroidRuntime.h>
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <unistd.h>
27 #include <utils/Log.h>
28
29 #include <sqlite3.h>
30
31 #include "core_jni_helpers.h"
32
33 namespace android {
34
35 static struct {
36 jfieldID memoryUsed;
37 jfieldID pageCacheOverflow;
38 jfieldID largestMemAlloc;
39 } gSQLiteDebugPagerStatsClassInfo;
40
nativeGetPagerStats(JNIEnv * env,jobject clazz,jobject statsObj)41 static void nativeGetPagerStats(JNIEnv *env, jobject clazz, jobject statsObj)
42 {
43 int memoryUsed;
44 int pageCacheOverflow;
45 int largestMemAlloc;
46 int unused;
47
48 sqlite3_status(SQLITE_STATUS_MEMORY_USED, &memoryUsed, &unused, 0);
49 sqlite3_status(SQLITE_STATUS_MALLOC_SIZE, &unused, &largestMemAlloc, 0);
50 sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &pageCacheOverflow, &unused, 0);
51 env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.memoryUsed, memoryUsed);
52 env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow,
53 pageCacheOverflow);
54 env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, largestMemAlloc);
55 }
56
57 /*
58 * JNI registration.
59 */
60
61 static const JNINativeMethod gMethods[] =
62 {
63 { "nativeGetPagerStats", "(Landroid/database/sqlite/SQLiteDebug$PagerStats;)V",
64 (void*) nativeGetPagerStats },
65 };
66
register_android_database_SQLiteDebug(JNIEnv * env)67 int register_android_database_SQLiteDebug(JNIEnv *env)
68 {
69 jclass clazz = FindClassOrDie(env, "android/database/sqlite/SQLiteDebug$PagerStats");
70
71 gSQLiteDebugPagerStatsClassInfo.memoryUsed = GetFieldIDOrDie(env, clazz, "memoryUsed", "I");
72 gSQLiteDebugPagerStatsClassInfo.largestMemAlloc = GetFieldIDOrDie(env, clazz,
73 "largestMemAlloc", "I");
74 gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow = GetFieldIDOrDie(env, clazz,
75 "pageCacheOverflow", "I");
76
77 return RegisterMethodsOrDie(env, "android/database/sqlite/SQLiteDebug",
78 gMethods, NELEM(gMethods));
79 }
80
81 } // namespace android
82