| /* |
| * 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 |