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/*
* Copyright (C) 2016 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.
*/
#define LOG_TAG "EphemeralStorage"
//#define LOG_NDEBUG 0
#include <android-base/logging.h>
#include "EphemeralStorage.h"
using ::android::hardware::hidl_string;
using ::android::hardware::hidl_vec;
namespace android {
EphemeralStorage::EphemeralStorage() {
}
EphemeralStorage::~EphemeralStorage() {
CHECK(mItems.empty())
<< "All item storage should have been released by now.";
}
hidl_string *EphemeralStorage::allocStringArray(size_t size) {
Item item;
item.mType = TYPE_STRING_ARRAY;
item.mObj = NULL;
item.mPtr = new hidl_string[size];
mItems.push_back(item);
return static_cast<hidl_string *>(item.mPtr);
}
void *EphemeralStorage::allocTemporaryStorage(size_t size) {
Item item;
item.mType = TYPE_STORAGE;
item.mObj = NULL;
item.mPtr = malloc(size);
mItems.push_back(item);
return item.mPtr;
}
const hidl_string *EphemeralStorage::allocTemporaryString(
JNIEnv *env, jstring stringObj) {
jstring obj = (jstring)env->NewGlobalRef(stringObj);
const char *val = env->GetStringUTFChars(obj, NULL);
Item item;
item.mType = TYPE_STRING;
item.mObj = obj;
item.mPtr = (void *)val;
mItems.push_back(item);
hidl_string *s = allocStringArray(1 /* size */);
s->setToExternal((char *)val, strlen(val));
return s;
}
native_handle_t *EphemeralStorage::allocTemporaryNativeHandle(
int numFds, int numInts) {
Item item;
item.mType = TYPE_NATIVE_HANDLE;
item.mObj = nullptr;
item.mPtr = native_handle_create(numFds, numInts);
mItems.push_back(item);
return static_cast<native_handle_t*>(item.mPtr);
}
#define DEFINE_ALLOC_VECTOR_METHODS(Suffix,Type,NewType) \
const hidl_vec<Type> *EphemeralStorage::allocTemporary ## Suffix ## Vector( \
JNIEnv *env, Type ## Array arrayObj) { \
Type ## Array obj = (Type ## Array)env->NewGlobalRef(arrayObj); \
jsize len = env->GetArrayLength(obj); \
const Type *val = env->Get ## NewType ## ArrayElements(obj, NULL); \
\
Item item; \
item.mType = TYPE_ ## Suffix ## _ARRAY; \
item.mObj = obj; \
item.mPtr = (void *)val; \
mItems.push_back(item); \
\
void *vecPtr = allocTemporaryStorage(sizeof(hidl_vec<Type>)); \
\
hidl_vec<Type> *vec = new (vecPtr) hidl_vec<Type>; \
vec->setToExternal(const_cast<Type *>(val), len); \
\
return vec; \
}
DEFINE_ALLOC_VECTOR_METHODS(Int8,jbyte,Byte)
DEFINE_ALLOC_VECTOR_METHODS(Int16,jshort,Short)
DEFINE_ALLOC_VECTOR_METHODS(Int32,jint,Int)
DEFINE_ALLOC_VECTOR_METHODS(Int64,jlong,Long)
DEFINE_ALLOC_VECTOR_METHODS(Float,jfloat,Float)
DEFINE_ALLOC_VECTOR_METHODS(Double,jdouble,Double)
#define DEFINE_RELEASE_ARRAY_CASE(Suffix,Type,NewType) \
case TYPE_ ## Suffix ## _ARRAY: \
{ \
env->Release ## NewType ## ArrayElements( \
(Type ## Array)item.mObj, \
(Type *)item.mPtr, \
0 /* mode */); \
\
env->DeleteGlobalRef(item.mObj); \
break; \
}
__attribute__((no_sanitize("unsigned-integer-overflow")))
void EphemeralStorage::release(JNIEnv *env) {
for (size_t i = mItems.size(); i--;) {
const Item &item = mItems[i];
switch (item.mType) {
case TYPE_STRING_ARRAY:
{
delete[] static_cast<hidl_string *>(item.mPtr);
break;
}
case TYPE_STORAGE:
{
free(item.mPtr);
break;
}
case TYPE_STRING:
{
env->ReleaseStringUTFChars(
(jstring)item.mObj, (const char *)item.mPtr);
env->DeleteGlobalRef(item.mObj);
break;
}
DEFINE_RELEASE_ARRAY_CASE(Int8,jbyte,Byte)
DEFINE_RELEASE_ARRAY_CASE(Int16,jshort,Short)
DEFINE_RELEASE_ARRAY_CASE(Int32,jint,Int)
DEFINE_RELEASE_ARRAY_CASE(Int64,jlong,Long)
DEFINE_RELEASE_ARRAY_CASE(Float,jfloat,Float)
DEFINE_RELEASE_ARRAY_CASE(Double,jdouble,Double)
case TYPE_NATIVE_HANDLE:
{
int err = native_handle_delete(static_cast<native_handle_t *>(item.mPtr));
CHECK(err == 0);
break;
}
default:
CHECK(!"Should not be here");
}
}
mItems.clear();
}
} // namespace android
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