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/*
* Copyright 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.
*/
#if INCLUDE_SYS_MOUNT_FOR_STATFS
#include <sys/mount.h>
#else
#include <sys/statfs.h>
#endif
#include <errno.h>
#include "jni.h"
#include "JNIHelp.h"
#include "android_runtime/AndroidRuntime.h"
namespace android
{
// ----------------------------------------------------------------------------
struct fields_t {
jfieldID context;
};
static fields_t fields;
// ----------------------------------------------------------------------------
static jint
android_os_StatFs_getBlockSize(JNIEnv *env, jobject thiz)
{
struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
return stat->f_bsize;
}
static jint
android_os_StatFs_getBlockCount(JNIEnv *env, jobject thiz)
{
struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
return stat->f_blocks;
}
static jint
android_os_StatFs_getFreeBlocks(JNIEnv *env, jobject thiz)
{
struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
return stat->f_bfree;
}
static jint
android_os_StatFs_getAvailableBlocks(JNIEnv *env, jobject thiz)
{
struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
return stat->f_bavail;
}
static void
android_os_StatFs_native_restat(JNIEnv *env, jobject thiz, jstring path)
{
if (path == NULL) {
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
return;
}
// get the object handle
struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
if (stat == NULL) {
jniThrowException(env, "java/lang/NoSuchFieldException", NULL);
return;
}
const char* pathstr = env->GetStringUTFChars(path, NULL);
if (pathstr == NULL) {
jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
return;
}
// note that stat will contain the new file data corresponding to
// pathstr
if (statfs(pathstr, stat) != 0) {
LOGE("statfs %s failed, errno: %d", pathstr, errno);
delete stat;
env->SetIntField(thiz, fields.context, 0);
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
}
// Release pathstr
env->ReleaseStringUTFChars(path, pathstr);
}
static void
android_os_StatFs_native_setup(JNIEnv *env, jobject thiz, jstring path)
{
if (path == NULL) {
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
return;
}
struct statfs* stat = new struct statfs;
if (stat == NULL) {
jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
return;
}
env->SetIntField(thiz, fields.context, (int)stat);
android_os_StatFs_native_restat(env, thiz, path);
}
static void
android_os_StatFs_native_finalize(JNIEnv *env, jobject thiz)
{
struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
if (stat != NULL) {
delete stat;
env->SetIntField(thiz, fields.context, 0);
}
}
// ----------------------------------------------------------------------------
static JNINativeMethod gMethods[] = {
{"getBlockSize", "()I", (void *)android_os_StatFs_getBlockSize},
{"getBlockCount", "()I", (void *)android_os_StatFs_getBlockCount},
{"getFreeBlocks", "()I", (void *)android_os_StatFs_getFreeBlocks},
{"getAvailableBlocks", "()I", (void *)android_os_StatFs_getAvailableBlocks},
{"native_setup", "(Ljava/lang/String;)V", (void *)android_os_StatFs_native_setup},
{"native_finalize", "()V", (void *)android_os_StatFs_native_finalize},
{"native_restat", "(Ljava/lang/String;)V", (void *)android_os_StatFs_native_restat},
};
int register_android_os_StatFs(JNIEnv *env)
{
jclass clazz;
clazz = env->FindClass("android/os/StatFs");
if (clazz == NULL) {
LOGE("Can't find android/os/StatFs");
return -1;
}
fields.context = env->GetFieldID(clazz, "mNativeContext", "I");
if (fields.context == NULL) {
LOGE("Can't find StatFs.mNativeContext");
return -1;
}
return AndroidRuntime::registerNativeMethods(env,
"android/os/StatFs", gMethods, NELEM(gMethods));
}
} // namespace android
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