93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
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/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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** Modified to support SQLite extensions by the SQLite developers:
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** sqlite-dev@sqlite.org.
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*/
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#define LOG_TAG "SQLiteDebug"
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#include <jni.h>
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#include <JNIHelp.h>
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#include <ALog-priv.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sqlite3.h>
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namespace android {
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static struct {
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jfieldID memoryUsed;
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jfieldID pageCacheOverflow;
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jfieldID largestMemAlloc;
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} gSQLiteDebugPagerStatsClassInfo;
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static void nativeGetPagerStats(JNIEnv *env, jobject clazz, jobject statsObj)
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{
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int memoryUsed;
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int pageCacheOverflow;
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int largestMemAlloc;
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int unused;
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sqlite3_status(SQLITE_STATUS_MEMORY_USED, &memoryUsed, &unused, 0);
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sqlite3_status(SQLITE_STATUS_MALLOC_SIZE, &unused, &largestMemAlloc, 0);
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sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &pageCacheOverflow, &unused, 0);
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env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.memoryUsed, memoryUsed);
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env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow,
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pageCacheOverflow);
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env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, largestMemAlloc);
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}
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/*
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* JNI registration.
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*/
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static JNINativeMethod gMethods[] =
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{
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{ "nativeGetPagerStats", "(Lorg/sqlite/database/sqlite/SQLiteDebug$PagerStats;)V",
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(void*) nativeGetPagerStats },
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};
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#define FIND_CLASS(var, className) \
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var = env->FindClass(className); \
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LOG_FATAL_IF(! var, "Unable to find class " className);
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#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
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var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
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LOG_FATAL_IF(! var, "Unable to find field " fieldName);
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int register_android_database_SQLiteDebug(JNIEnv *env)
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{
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jclass clazz;
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FIND_CLASS(clazz, "org/sqlite/database/sqlite/SQLiteDebug$PagerStats");
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GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.memoryUsed, clazz,
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"memoryUsed", "I");
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GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, clazz,
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"largestMemAlloc", "I");
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GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow, clazz,
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"pageCacheOverflow", "I");
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return jniRegisterNativeMethods(env, "org/sqlite/database/sqlite/SQLiteDebug",
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gMethods, NELEM(gMethods));
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}
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} // namespace android
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