249 lines
9.7 KiB
C
249 lines
9.7 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2005 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef ANDROID_PARCEL_H
|
||
|
|
#define ANDROID_PARCEL_H
|
||
|
|
|
||
|
|
#include <cutils/native_handle.h>
|
||
|
|
#include <utils/Errors.h>
|
||
|
|
#include <utils/RefBase.h>
|
||
|
|
#include <utils/String16.h>
|
||
|
|
#include <utils/Vector.h>
|
||
|
|
|
||
|
|
// ---------------------------------------------------------------------------
|
||
|
|
namespace android {
|
||
|
|
|
||
|
|
class Flattenable;
|
||
|
|
class IBinder;
|
||
|
|
class IPCThreadState;
|
||
|
|
class ProcessState;
|
||
|
|
class String8;
|
||
|
|
class TextOutput;
|
||
|
|
|
||
|
|
struct flat_binder_object; // defined in support_p/binder_module.h
|
||
|
|
|
||
|
|
class Parcel
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
Parcel();
|
||
|
|
~Parcel();
|
||
|
|
|
||
|
|
const uint8_t* data() const;
|
||
|
|
size_t dataSize() const;
|
||
|
|
size_t dataAvail() const;
|
||
|
|
size_t dataPosition() const;
|
||
|
|
size_t dataCapacity() const;
|
||
|
|
|
||
|
|
status_t setDataSize(size_t size);
|
||
|
|
void setDataPosition(size_t pos) const;
|
||
|
|
status_t setDataCapacity(size_t size);
|
||
|
|
|
||
|
|
status_t setData(const uint8_t* buffer, size_t len);
|
||
|
|
|
||
|
|
status_t appendFrom(Parcel *parcel, size_t start, size_t len);
|
||
|
|
|
||
|
|
bool hasFileDescriptors() const;
|
||
|
|
|
||
|
|
// Writes the RPC header.
|
||
|
|
status_t writeInterfaceToken(const String16& interface);
|
||
|
|
|
||
|
|
// Parses the RPC header, returning true if the interface name
|
||
|
|
// in the header matches the expected interface from the caller.
|
||
|
|
//
|
||
|
|
// Additionally, enforceInterface does part of the work of
|
||
|
|
// propagating the StrictMode policy mask, populating the current
|
||
|
|
// IPCThreadState, which as an optimization may optionally be
|
||
|
|
// passed in.
|
||
|
|
bool enforceInterface(const String16& interface,
|
||
|
|
IPCThreadState* threadState = NULL) const;
|
||
|
|
bool checkInterface(IBinder*) const;
|
||
|
|
|
||
|
|
void freeData();
|
||
|
|
|
||
|
|
const size_t* objects() const;
|
||
|
|
size_t objectsCount() const;
|
||
|
|
|
||
|
|
status_t errorCheck() const;
|
||
|
|
void setError(status_t err);
|
||
|
|
|
||
|
|
status_t write(const void* data, size_t len);
|
||
|
|
void* writeInplace(size_t len);
|
||
|
|
status_t writeUnpadded(const void* data, size_t len);
|
||
|
|
status_t writeInt32(int32_t val);
|
||
|
|
status_t writeInt64(int64_t val);
|
||
|
|
status_t writeFloat(float val);
|
||
|
|
status_t writeDouble(double val);
|
||
|
|
status_t writeIntPtr(intptr_t val);
|
||
|
|
status_t writeCString(const char* str);
|
||
|
|
status_t writeString8(const String8& str);
|
||
|
|
status_t writeString16(const String16& str);
|
||
|
|
status_t writeString16(const char16_t* str, size_t len);
|
||
|
|
status_t writeStrongBinder(const sp<IBinder>& val);
|
||
|
|
status_t writeWeakBinder(const wp<IBinder>& val);
|
||
|
|
status_t write(const Flattenable& val);
|
||
|
|
|
||
|
|
// Place a native_handle into the parcel (the native_handle's file-
|
||
|
|
// descriptors are dup'ed, so it is safe to delete the native_handle
|
||
|
|
// when this function returns).
|
||
|
|
// Doesn't take ownership of the native_handle.
|
||
|
|
status_t writeNativeHandle(const native_handle* handle);
|
||
|
|
|
||
|
|
// Place a file descriptor into the parcel. The given fd must remain
|
||
|
|
// valid for the lifetime of the parcel.
|
||
|
|
status_t writeFileDescriptor(int fd);
|
||
|
|
|
||
|
|
// Place a file descriptor into the parcel. A dup of the fd is made, which
|
||
|
|
// will be closed once the parcel is destroyed.
|
||
|
|
status_t writeDupFileDescriptor(int fd);
|
||
|
|
|
||
|
|
status_t writeObject(const flat_binder_object& val, bool nullMetaData);
|
||
|
|
|
||
|
|
// Like Parcel.java's writeNoException(). Just writes a zero int32.
|
||
|
|
// Currently the native implementation doesn't do any of the StrictMode
|
||
|
|
// stack gathering and serialization that the Java implementation does.
|
||
|
|
status_t writeNoException();
|
||
|
|
|
||
|
|
void remove(size_t start, size_t amt);
|
||
|
|
|
||
|
|
status_t read(void* outData, size_t len) const;
|
||
|
|
const void* readInplace(size_t len) const;
|
||
|
|
int32_t readInt32() const;
|
||
|
|
status_t readInt32(int32_t *pArg) const;
|
||
|
|
int64_t readInt64() const;
|
||
|
|
status_t readInt64(int64_t *pArg) const;
|
||
|
|
float readFloat() const;
|
||
|
|
status_t readFloat(float *pArg) const;
|
||
|
|
double readDouble() const;
|
||
|
|
status_t readDouble(double *pArg) const;
|
||
|
|
intptr_t readIntPtr() const;
|
||
|
|
status_t readIntPtr(intptr_t *pArg) const;
|
||
|
|
|
||
|
|
const char* readCString() const;
|
||
|
|
String8 readString8() const;
|
||
|
|
String16 readString16() const;
|
||
|
|
const char16_t* readString16Inplace(size_t* outLen) const;
|
||
|
|
sp<IBinder> readStrongBinder() const;
|
||
|
|
wp<IBinder> readWeakBinder() const;
|
||
|
|
status_t read(Flattenable& val) const;
|
||
|
|
|
||
|
|
// Like Parcel.java's readExceptionCode(). Reads the first int32
|
||
|
|
// off of a Parcel's header, returning 0 or the negative error
|
||
|
|
// code on exceptions, but also deals with skipping over rich
|
||
|
|
// response headers. Callers should use this to read & parse the
|
||
|
|
// response headers rather than doing it by hand.
|
||
|
|
int32_t readExceptionCode() const;
|
||
|
|
|
||
|
|
// Retrieve native_handle from the parcel. This returns a copy of the
|
||
|
|
// parcel's native_handle (the caller takes ownership). The caller
|
||
|
|
// must free the native_handle with native_handle_close() and
|
||
|
|
// native_handle_delete().
|
||
|
|
native_handle* readNativeHandle() const;
|
||
|
|
|
||
|
|
|
||
|
|
// Retrieve a file descriptor from the parcel. This returns the raw fd
|
||
|
|
// in the parcel, which you do not own -- use dup() to get your own copy.
|
||
|
|
int readFileDescriptor() const;
|
||
|
|
|
||
|
|
const flat_binder_object* readObject(bool nullMetaData) const;
|
||
|
|
|
||
|
|
// Explicitly close all file descriptors in the parcel.
|
||
|
|
void closeFileDescriptors();
|
||
|
|
|
||
|
|
typedef void (*release_func)(Parcel* parcel,
|
||
|
|
const uint8_t* data, size_t dataSize,
|
||
|
|
const size_t* objects, size_t objectsSize,
|
||
|
|
void* cookie);
|
||
|
|
|
||
|
|
const uint8_t* ipcData() const;
|
||
|
|
size_t ipcDataSize() const;
|
||
|
|
const size_t* ipcObjects() const;
|
||
|
|
size_t ipcObjectsCount() const;
|
||
|
|
void ipcSetDataReference(const uint8_t* data, size_t dataSize,
|
||
|
|
const size_t* objects, size_t objectsCount,
|
||
|
|
release_func relFunc, void* relCookie);
|
||
|
|
|
||
|
|
void print(TextOutput& to, uint32_t flags = 0) const;
|
||
|
|
|
||
|
|
private:
|
||
|
|
Parcel(const Parcel& o);
|
||
|
|
Parcel& operator=(const Parcel& o);
|
||
|
|
|
||
|
|
status_t finishWrite(size_t len);
|
||
|
|
void releaseObjects();
|
||
|
|
void acquireObjects();
|
||
|
|
status_t growData(size_t len);
|
||
|
|
status_t restartWrite(size_t desired);
|
||
|
|
status_t continueWrite(size_t desired);
|
||
|
|
void freeDataNoInit();
|
||
|
|
void initState();
|
||
|
|
void scanForFds() const;
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
status_t readAligned(T *pArg) const;
|
||
|
|
|
||
|
|
template<class T> T readAligned() const;
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
status_t writeAligned(T val);
|
||
|
|
|
||
|
|
status_t mError;
|
||
|
|
uint8_t* mData;
|
||
|
|
size_t mDataSize;
|
||
|
|
size_t mDataCapacity;
|
||
|
|
mutable size_t mDataPos;
|
||
|
|
size_t* mObjects;
|
||
|
|
size_t mObjectsSize;
|
||
|
|
size_t mObjectsCapacity;
|
||
|
|
mutable size_t mNextObjectHint;
|
||
|
|
|
||
|
|
mutable bool mFdsKnown;
|
||
|
|
mutable bool mHasFds;
|
||
|
|
|
||
|
|
release_func mOwner;
|
||
|
|
void* mOwnerCookie;
|
||
|
|
};
|
||
|
|
|
||
|
|
// ---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
inline TextOutput& operator<<(TextOutput& to, const Parcel& parcel)
|
||
|
|
{
|
||
|
|
parcel.print(to);
|
||
|
|
return to;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
// Generic acquire and release of objects.
|
||
|
|
void acquire_object(const sp<ProcessState>& proc,
|
||
|
|
const flat_binder_object& obj, const void* who);
|
||
|
|
void release_object(const sp<ProcessState>& proc,
|
||
|
|
const flat_binder_object& obj, const void* who);
|
||
|
|
|
||
|
|
void flatten_binder(const sp<ProcessState>& proc,
|
||
|
|
const sp<IBinder>& binder, flat_binder_object* out);
|
||
|
|
void flatten_binder(const sp<ProcessState>& proc,
|
||
|
|
const wp<IBinder>& binder, flat_binder_object* out);
|
||
|
|
status_t unflatten_binder(const sp<ProcessState>& proc,
|
||
|
|
const flat_binder_object& flat, sp<IBinder>* out);
|
||
|
|
status_t unflatten_binder(const sp<ProcessState>& proc,
|
||
|
|
const flat_binder_object& flat, wp<IBinder>* out);
|
||
|
|
|
||
|
|
}; // namespace android
|
||
|
|
|
||
|
|
// ---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#endif // ANDROID_PARCEL_H
|