210 lines
7.9 KiB
C++
210 lines
7.9 KiB
C++
/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_PARCEL_H
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#define ANDROID_PARCEL_H
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#include <cutils/native_handle.h>
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#include <utils/Errors.h>
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#include <utils/RefBase.h>
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#include <utils/String16.h>
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#include <utils/Vector.h>
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// ---------------------------------------------------------------------------
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namespace android {
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class IBinder;
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class ProcessState;
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class String8;
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class TextOutput;
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struct flat_binder_object; // defined in support_p/binder_module.h
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class Parcel
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{
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public:
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Parcel();
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~Parcel();
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const uint8_t* data() const;
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size_t dataSize() const;
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size_t dataAvail() const;
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size_t dataPosition() const;
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size_t dataCapacity() const;
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status_t setDataSize(size_t size);
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void setDataPosition(size_t pos) const;
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status_t setDataCapacity(size_t size);
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status_t setData(const uint8_t* buffer, size_t len);
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status_t appendFrom(Parcel *parcel, size_t start, size_t len);
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bool hasFileDescriptors() const;
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status_t writeInterfaceToken(const String16& interface);
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bool enforceInterface(const String16& interface) const;
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void freeData();
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const size_t* objects() const;
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size_t objectsCount() const;
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status_t errorCheck() const;
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void setError(status_t err);
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status_t write(const void* data, size_t len);
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void* writeInplace(size_t len);
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status_t writeUnpadded(const void* data, size_t len);
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status_t writeInt32(int32_t val);
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status_t writeInt64(int64_t val);
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status_t writeFloat(float val);
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status_t writeDouble(double val);
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status_t writeCString(const char* str);
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status_t writeString8(const String8& str);
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status_t writeString16(const String16& str);
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status_t writeString16(const char16_t* str, size_t len);
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status_t writeStrongBinder(const sp<IBinder>& val);
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status_t writeWeakBinder(const wp<IBinder>& val);
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// doesn't take ownership of the native_handle
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status_t writeNativeHandle(const native_handle& handle);
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// Place a file descriptor into the parcel. The given fd must remain
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// valid for the lifetime of the parcel.
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status_t writeFileDescriptor(int fd);
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// Place a file descriptor into the parcel. A dup of the fd is made, which
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// will be closed once the parcel is destroyed.
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status_t writeDupFileDescriptor(int fd);
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status_t writeObject(const flat_binder_object& val, bool nullMetaData);
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void remove(size_t start, size_t amt);
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status_t read(void* outData, size_t len) const;
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const void* readInplace(size_t len) const;
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int32_t readInt32() const;
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status_t readInt32(int32_t *pArg) const;
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int64_t readInt64() const;
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status_t readInt64(int64_t *pArg) const;
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float readFloat() const;
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status_t readFloat(float *pArg) const;
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double readDouble() const;
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status_t readDouble(double *pArg) const;
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const char* readCString() const;
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String8 readString8() const;
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String16 readString16() const;
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const char16_t* readString16Inplace(size_t* outLen) const;
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sp<IBinder> readStrongBinder() const;
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wp<IBinder> readWeakBinder() const;
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// if alloc is NULL, native_handle is allocated with malloc(), otherwise
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// alloc is used. If the function fails, the effects of alloc() must be
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// reverted by the caller.
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native_handle* readNativeHandle(
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native_handle* (*alloc)(void* cookie, int numFds, int ints),
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void* cookie) const;
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// Retrieve a file descriptor from the parcel. This returns the raw fd
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// in the parcel, which you do not own -- use dup() to get your own copy.
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int readFileDescriptor() const;
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const flat_binder_object* readObject(bool nullMetaData) const;
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// Explicitly close all file descriptors in the parcel.
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void closeFileDescriptors();
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typedef void (*release_func)(Parcel* parcel,
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const uint8_t* data, size_t dataSize,
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const size_t* objects, size_t objectsSize,
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void* cookie);
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const uint8_t* ipcData() const;
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size_t ipcDataSize() const;
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const size_t* ipcObjects() const;
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size_t ipcObjectsCount() const;
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void ipcSetDataReference(const uint8_t* data, size_t dataSize,
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const size_t* objects, size_t objectsCount,
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release_func relFunc, void* relCookie);
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void print(TextOutput& to, uint32_t flags = 0) const;
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private:
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Parcel(const Parcel& o);
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Parcel& operator=(const Parcel& o);
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status_t finishWrite(size_t len);
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void releaseObjects();
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void acquireObjects();
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status_t growData(size_t len);
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status_t restartWrite(size_t desired);
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status_t continueWrite(size_t desired);
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void freeDataNoInit();
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void initState();
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void scanForFds() const;
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status_t mError;
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uint8_t* mData;
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size_t mDataSize;
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size_t mDataCapacity;
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mutable size_t mDataPos;
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size_t* mObjects;
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size_t mObjectsSize;
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size_t mObjectsCapacity;
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mutable size_t mNextObjectHint;
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mutable bool mFdsKnown;
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mutable bool mHasFds;
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release_func mOwner;
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void* mOwnerCookie;
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};
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// ---------------------------------------------------------------------------
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inline TextOutput& operator<<(TextOutput& to, const Parcel& parcel)
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{
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parcel.print(to);
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return to;
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}
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// ---------------------------------------------------------------------------
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// Generic acquire and release of objects.
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void acquire_object(const sp<ProcessState>& proc,
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const flat_binder_object& obj, const void* who);
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void release_object(const sp<ProcessState>& proc,
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const flat_binder_object& obj, const void* who);
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void flatten_binder(const sp<ProcessState>& proc,
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const sp<IBinder>& binder, flat_binder_object* out);
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void flatten_binder(const sp<ProcessState>& proc,
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const wp<IBinder>& binder, flat_binder_object* out);
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status_t unflatten_binder(const sp<ProcessState>& proc,
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const flat_binder_object& flat, sp<IBinder>* out);
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status_t unflatten_binder(const sp<ProcessState>& proc,
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const flat_binder_object& flat, wp<IBinder>* out);
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}; // namespace android
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// ---------------------------------------------------------------------------
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#endif // ANDROID_PARCEL_H
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