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
33namespace android {
34
35static struct {
36    jfieldID memoryUsed;
37    jfieldID pageCacheOverflow;
38    jfieldID largestMemAlloc;
39} gSQLiteDebugPagerStatsClassInfo;
40
41static 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
61static const JNINativeMethod gMethods[] =
62{
63    { "nativeGetPagerStats", "(Landroid/database/sqlite/SQLiteDebug$PagerStats;)V",
64            (void*) nativeGetPagerStats },
65};
66
67int register_android_database_SQLiteDebug(JNIEnv *env)
68{
69    jclass clazz = FindClassOrDie(env, "android/database/sqlite/SQLiteDebug$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