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yap-6.3/packages/swig/android/jni/sqlite/android_database_SQLiteDebug.cpp

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2014-07-16 00:57:48 +01:00
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
** Modified to support SQLite extensions by the SQLite developers:
** sqlite-dev@sqlite.org.
*/
#define LOG_TAG "SQLiteDebug"
#include <jni.h>
#include <JNIHelp.h>
#include <ALog-priv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sqlite3.h>
namespace android {
static struct {
jfieldID memoryUsed;
jfieldID pageCacheOverflow;
jfieldID largestMemAlloc;
} gSQLiteDebugPagerStatsClassInfo;
static void nativeGetPagerStats(JNIEnv *env, jobject clazz, jobject statsObj)
{
int memoryUsed;
int pageCacheOverflow;
int largestMemAlloc;
int unused;
sqlite3_status(SQLITE_STATUS_MEMORY_USED, &memoryUsed, &unused, 0);
sqlite3_status(SQLITE_STATUS_MALLOC_SIZE, &unused, &largestMemAlloc, 0);
sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &pageCacheOverflow, &unused, 0);
env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.memoryUsed, memoryUsed);
env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow,
pageCacheOverflow);
env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, largestMemAlloc);
}
/*
* JNI registration.
*/
static JNINativeMethod gMethods[] =
{
{ "nativeGetPagerStats", "(Lorg/sqlite/database/sqlite/SQLiteDebug$PagerStats;)V",
(void*) nativeGetPagerStats },
};
#define FIND_CLASS(var, className) \
var = env->FindClass(className); \
LOG_FATAL_IF(! var, "Unable to find class " className);
#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
LOG_FATAL_IF(! var, "Unable to find field " fieldName);
int register_android_database_SQLiteDebug(JNIEnv *env)
{
jclass clazz;
FIND_CLASS(clazz, "org/sqlite/database/sqlite/SQLiteDebug$PagerStats");
GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.memoryUsed, clazz,
"memoryUsed", "I");
GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, clazz,
"largestMemAlloc", "I");
GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow, clazz,
"pageCacheOverflow", "I");
return jniRegisterNativeMethods(env, "org/sqlite/database/sqlite/SQLiteDebug",
gMethods, NELEM(gMethods));
}
} // namespace android