| /* |
| * 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 <string> |
| #include <vector> |
| |
| #include <android-base/unique_fd.h> |
| #include <cutils/native_handle.h> |
| #include <utils/Errors.h> |
| #include <utils/RefBase.h> |
| #include <utils/String16.h> |
| #include <utils/Vector.h> |
| #include <utils/Flattenable.h> |
| |
| #include <binder/binder_kernel.h> |
| #include <binder/IInterface.h> |
| #include <binder/Parcelable.h> |
| #include <binder/Map.h> |
| |
| // --------------------------------------------------------------------------- |
| namespace android { |
| |
| template <typename T> class Flattenable; |
| template <typename T> class LightFlattenable; |
| class IBinder; |
| class IPCThreadState; |
| class ProcessState; |
| class String8; |
| class TextOutput; |
| |
| namespace binder { |
| class Value; |
| }; |
| |
| class Parcel { |
| friend class IPCThreadState; |
| public: |
| class ReadableBlob; |
| class WritableBlob; |
| |
| 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(const Parcel *parcel, |
| size_t start, size_t len); |
| |
| int compareData(const Parcel& other); |
| |
| bool allowFds() const; |
| bool pushAllowFds(bool allowFds); |
| void restoreAllowFds(bool lastValue); |
| |
| 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 = nullptr) const; |
| bool checkInterface(IBinder*) const; |
| |
| void freeData(); |
| |
| private: |
| const binder_size_t* objects() const; |
| |
| public: |
| 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 writeUint32(uint32_t val); |
| status_t writeInt64(int64_t val); |
| status_t writeUint64(uint64_t val); |
| status_t writeFloat(float val); |
| status_t writeDouble(double val); |
| status_t writeCString(const char* str); |
| status_t writeString8(const String8& str); |
| status_t writeString16(const String16& str); |
| status_t writeString16(const std::unique_ptr<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 writeInt32Array(size_t len, const int32_t *val); |
| status_t writeByteArray(size_t len, const uint8_t *val); |
| status_t writeBool(bool val); |
| status_t writeChar(char16_t val); |
| status_t writeByte(int8_t val); |
| |
| // Take a UTF8 encoded string, convert to UTF16, write it to the parcel. |
| status_t writeUtf8AsUtf16(const std::string& str); |
| status_t writeUtf8AsUtf16(const std::unique_ptr<std::string>& str); |
| |
| status_t writeByteVector(const std::unique_ptr<std::vector<int8_t>>& val); |
| status_t writeByteVector(const std::vector<int8_t>& val); |
| status_t writeByteVector(const std::unique_ptr<std::vector<uint8_t>>& val); |
| status_t writeByteVector(const std::vector<uint8_t>& val); |
| status_t writeInt32Vector(const std::unique_ptr<std::vector<int32_t>>& val); |
| status_t writeInt32Vector(const std::vector<int32_t>& val); |
| status_t writeInt64Vector(const std::unique_ptr<std::vector<int64_t>>& val); |
| status_t writeInt64Vector(const std::vector<int64_t>& val); |
| status_t writeUint64Vector(const std::unique_ptr<std::vector<uint64_t>>& val); |
| status_t writeUint64Vector(const std::vector<uint64_t>& val); |
| status_t writeFloatVector(const std::unique_ptr<std::vector<float>>& val); |
| status_t writeFloatVector(const std::vector<float>& val); |
| status_t writeDoubleVector(const std::unique_ptr<std::vector<double>>& val); |
| status_t writeDoubleVector(const std::vector<double>& val); |
| status_t writeBoolVector(const std::unique_ptr<std::vector<bool>>& val); |
| status_t writeBoolVector(const std::vector<bool>& val); |
| status_t writeCharVector(const std::unique_ptr<std::vector<char16_t>>& val); |
| status_t writeCharVector(const std::vector<char16_t>& val); |
| status_t writeString16Vector( |
| const std::unique_ptr<std::vector<std::unique_ptr<String16>>>& val); |
| status_t writeString16Vector(const std::vector<String16>& val); |
| status_t writeUtf8VectorAsUtf16Vector( |
| const std::unique_ptr<std::vector<std::unique_ptr<std::string>>>& val); |
| status_t writeUtf8VectorAsUtf16Vector(const std::vector<std::string>& val); |
| |
| status_t writeStrongBinderVector(const std::unique_ptr<std::vector<sp<IBinder>>>& val); |
| status_t writeStrongBinderVector(const std::vector<sp<IBinder>>& val); |
| |
| template<typename T> |
| status_t writeParcelableVector(const std::unique_ptr<std::vector<std::unique_ptr<T>>>& val); |
| template<typename T> |
| status_t writeParcelableVector(const std::shared_ptr<std::vector<std::unique_ptr<T>>>& val); |
| template<typename T> |
| status_t writeParcelableVector(const std::vector<T>& val); |
| |
| template<typename T> |
| status_t writeNullableParcelable(const std::unique_ptr<T>& parcelable); |
| |
| status_t writeParcelable(const Parcelable& parcelable); |
| |
| status_t writeValue(const binder::Value& value); |
| |
| template<typename T> |
| status_t write(const Flattenable<T>& val); |
| |
| template<typename T> |
| status_t write(const LightFlattenable<T>& val); |
| |
| template<typename T> |
| status_t writeVectorSize(const std::vector<T>& val); |
| template<typename T> |
| status_t writeVectorSize(const std::unique_ptr<std::vector<T>>& val); |
| |
| status_t writeMap(const binder::Map& map); |
| status_t writeNullableMap(const std::unique_ptr<binder::Map>& map); |
| |
| // 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. |
| // The Parcel does not take ownership of the given fd unless you ask it to. |
| status_t writeFileDescriptor(int fd, bool takeOwnership = false); |
| |
| // 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); |
| |
| // Place a Java "parcel file descriptor" into the parcel. The given fd must remain |
| // valid for the lifetime of the parcel. |
| // The Parcel does not take ownership of the given fd unless you ask it to. |
| status_t writeParcelFileDescriptor(int fd, bool takeOwnership = false); |
| |
| // Place a Java "parcel file descriptor" into the parcel. A dup of the fd is made, which will |
| // be closed once the parcel is destroyed. |
| status_t writeDupParcelFileDescriptor(int fd); |
| |
| // Place a file descriptor into the parcel. This will not affect the |
| // semantics of the smart file descriptor. A new descriptor will be |
| // created, and will be closed when the parcel is destroyed. |
| status_t writeUniqueFileDescriptor( |
| const base::unique_fd& fd); |
| |
| // Place a vector of file desciptors into the parcel. Each descriptor is |
| // dup'd as in writeDupFileDescriptor |
| status_t writeUniqueFileDescriptorVector( |
| const std::unique_ptr<std::vector<base::unique_fd>>& val); |
| status_t writeUniqueFileDescriptorVector( |
| const std::vector<base::unique_fd>& val); |
| |
| // Writes a blob to the parcel. |
| // If the blob is small, then it is stored in-place, otherwise it is |
| // transferred by way of an anonymous shared memory region. Prefer sending |
| // immutable blobs if possible since they may be subsequently transferred between |
| // processes without further copying whereas mutable blobs always need to be copied. |
| // The caller should call release() on the blob after writing its contents. |
| status_t writeBlob(size_t len, bool mutableCopy, WritableBlob* outBlob); |
| |
| // Write an existing immutable blob file descriptor to the parcel. |
| // This allows the client to send the same blob to multiple processes |
| // as long as it keeps a dup of the blob file descriptor handy for later. |
| status_t writeDupImmutableBlobFileDescriptor(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; |
| uint32_t readUint32() const; |
| status_t readUint32(uint32_t *pArg) const; |
| int64_t readInt64() const; |
| status_t readInt64(int64_t *pArg) const; |
| uint64_t readUint64() const; |
| status_t readUint64(uint64_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; |
| bool readBool() const; |
| status_t readBool(bool *pArg) const; |
| char16_t readChar() const; |
| status_t readChar(char16_t *pArg) const; |
| int8_t readByte() const; |
| status_t readByte(int8_t *pArg) const; |
| |
| // Read a UTF16 encoded string, convert to UTF8 |
| status_t readUtf8FromUtf16(std::string* str) const; |
| status_t readUtf8FromUtf16(std::unique_ptr<std::string>* str) const; |
| |
| const char* readCString() const; |
| String8 readString8() const; |
| status_t readString8(String8* pArg) const; |
| String16 readString16() const; |
| status_t readString16(String16* pArg) const; |
| status_t readString16(std::unique_ptr<String16>* pArg) const; |
| const char16_t* readString16Inplace(size_t* outLen) const; |
| sp<IBinder> readStrongBinder() const; |
| status_t readStrongBinder(sp<IBinder>* val) const; |
| status_t readNullableStrongBinder(sp<IBinder>* val) const; |
| wp<IBinder> readWeakBinder() const; |
| |
| template<typename T> |
| status_t readParcelableVector( |
| std::unique_ptr<std::vector<std::unique_ptr<T>>>* val) const; |
| template<typename T> |
| status_t readParcelableVector(std::vector<T>* val) const; |
| |
| status_t readParcelable(Parcelable* parcelable) const; |
| |
| template<typename T> |
| status_t readParcelable(std::unique_ptr<T>* parcelable) const; |
| |
| status_t readValue(binder::Value* value) const; |
| |
| template<typename T> |
| status_t readStrongBinder(sp<T>* val) const; |
| |
| template<typename T> |
| status_t readNullableStrongBinder(sp<T>* val) const; |
| |
| status_t readStrongBinderVector(std::unique_ptr<std::vector<sp<IBinder>>>* val) const; |
| status_t readStrongBinderVector(std::vector<sp<IBinder>>* val) const; |
| |
| status_t readByteVector(std::unique_ptr<std::vector<int8_t>>* val) const; |
| status_t readByteVector(std::vector<int8_t>* val) const; |
| status_t readByteVector(std::unique_ptr<std::vector<uint8_t>>* val) const; |
| status_t readByteVector(std::vector<uint8_t>* val) const; |
| status_t readInt32Vector(std::unique_ptr<std::vector<int32_t>>* val) const; |
| status_t readInt32Vector(std::vector<int32_t>* val) const; |
| status_t readInt64Vector(std::unique_ptr<std::vector<int64_t>>* val) const; |
| status_t readInt64Vector(std::vector<int64_t>* val) const; |
| status_t readUint64Vector(std::unique_ptr<std::vector<uint64_t>>* val) const; |
| status_t readUint64Vector(std::vector<uint64_t>* val) const; |
| status_t readFloatVector(std::unique_ptr<std::vector<float>>* val) const; |
| status_t readFloatVector(std::vector<float>* val) const; |
| status_t readDoubleVector(std::unique_ptr<std::vector<double>>* val) const; |
| status_t readDoubleVector(std::vector<double>* val) const; |
| status_t readBoolVector(std::unique_ptr<std::vector<bool>>* val) const; |
| status_t readBoolVector(std::vector<bool>* val) const; |
| status_t readCharVector(std::unique_ptr<std::vector<char16_t>>* val) const; |
| status_t readCharVector(std::vector<char16_t>* val) const; |
| status_t readString16Vector( |
| std::unique_ptr<std::vector<std::unique_ptr<String16>>>* val) const; |
| status_t readString16Vector(std::vector<String16>* val) const; |
| status_t readUtf8VectorFromUtf16Vector( |
| std::unique_ptr<std::vector<std::unique_ptr<std::string>>>* val) const; |
| status_t readUtf8VectorFromUtf16Vector(std::vector<std::string>* val) const; |
| |
| template<typename T> |
| status_t read(Flattenable<T>& val) const; |
| |
| template<typename T> |
| status_t read(LightFlattenable<T>& val) const; |
| |
| template<typename T> |
| status_t resizeOutVector(std::vector<T>* val) const; |
| template<typename T> |
| status_t resizeOutVector(std::unique_ptr<std::vector<T>>* val) const; |
| |
| status_t readMap(binder::Map* map)const; |
| status_t readNullableMap(std::unique_ptr<binder::Map>* map) 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; |
| |
| // Retrieve a Java "parcel 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 readParcelFileDescriptor() const; |
| |
| // Retrieve a smart file descriptor from the parcel. |
| status_t readUniqueFileDescriptor( |
| base::unique_fd* val) const; |
| |
| // Retrieve a Java "parcel file descriptor" from the parcel. |
| status_t readUniqueParcelFileDescriptor(base::unique_fd* val) const; |
| |
| |
| // Retrieve a vector of smart file descriptors from the parcel. |
| status_t readUniqueFileDescriptorVector( |
| std::unique_ptr<std::vector<base::unique_fd>>* val) const; |
| status_t readUniqueFileDescriptorVector( |
| std::vector<base::unique_fd>* val) const; |
| |
| // Reads a blob from the parcel. |
| // The caller should call release() on the blob after reading its contents. |
| status_t readBlob(size_t len, ReadableBlob* outBlob) const; |
| |
| const flat_binder_object* readObject(bool nullMetaData) const; |
| |
| // Explicitly close all file descriptors in the parcel. |
| void closeFileDescriptors(); |
| |
| // Debugging: get metrics on current allocations. |
| static size_t getGlobalAllocSize(); |
| static size_t getGlobalAllocCount(); |
| |
| bool replaceCallingWorkSourceUid(uid_t uid); |
| // Returns the work source provided by the caller. This can only be trusted for trusted calling |
| // uid. |
| uid_t readCallingWorkSourceUid(); |
| void readRequestHeaders() const; |
| |
| private: |
| typedef void (*release_func)(Parcel* parcel, |
| const uint8_t* data, size_t dataSize, |
| const binder_size_t* objects, size_t objectsSize, |
| void* cookie); |
| |
| uintptr_t ipcData() const; |
| size_t ipcDataSize() const; |
| uintptr_t ipcObjects() const; |
| size_t ipcObjectsCount() const; |
| void ipcSetDataReference(const uint8_t* data, size_t dataSize, |
| const binder_size_t* objects, size_t objectsCount, |
| release_func relFunc, void* relCookie); |
| |
| public: |
| 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); |
| status_t writePointer(uintptr_t val); |
| status_t readPointer(uintptr_t *pArg) const; |
| uintptr_t readPointer() const; |
| void freeDataNoInit(); |
| void initState(); |
| void scanForFds() const; |
| status_t validateReadData(size_t len) const; |
| void updateWorkSourceRequestHeaderPosition() 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 writeRawNullableParcelable(const Parcelable* |
| parcelable); |
| |
| template<typename T, typename U> |
| status_t unsafeReadTypedVector(std::vector<T>* val, |
| status_t(Parcel::*read_func)(U*) const) const; |
| template<typename T> |
| status_t readNullableTypedVector(std::unique_ptr<std::vector<T>>* val, |
| status_t(Parcel::*read_func)(T*) const) const; |
| template<typename T> |
| status_t readTypedVector(std::vector<T>* val, |
| status_t(Parcel::*read_func)(T*) const) const; |
| template<typename T, typename U> |
| status_t unsafeWriteTypedVector(const std::vector<T>& val, |
| status_t(Parcel::*write_func)(U)); |
| template<typename T> |
| status_t writeNullableTypedVector(const std::unique_ptr<std::vector<T>>& val, |
| status_t(Parcel::*write_func)(const T&)); |
| template<typename T> |
| status_t writeNullableTypedVector(const std::unique_ptr<std::vector<T>>& val, |
| status_t(Parcel::*write_func)(T)); |
| template<typename T> |
| status_t writeTypedVector(const std::vector<T>& val, |
| status_t(Parcel::*write_func)(const T&)); |
| template<typename T> |
| status_t writeTypedVector(const std::vector<T>& val, |
| status_t(Parcel::*write_func)(T)); |
| |
| status_t mError; |
| uint8_t* mData; |
| size_t mDataSize; |
| size_t mDataCapacity; |
| mutable size_t mDataPos; |
| binder_size_t* mObjects; |
| size_t mObjectsSize; |
| size_t mObjectsCapacity; |
| mutable size_t mNextObjectHint; |
| mutable bool mObjectsSorted; |
| |
| mutable bool mRequestHeaderPresent; |
| mutable size_t mWorkSourceRequestHeaderPosition; |
| |
| mutable bool mFdsKnown; |
| mutable bool mHasFds; |
| bool mAllowFds; |
| |
| release_func mOwner; |
| void* mOwnerCookie; |
| |
| class Blob { |
| public: |
| Blob(); |
| ~Blob(); |
| |
| void clear(); |
| void release(); |
| inline size_t size() const { return mSize; } |
| inline int fd() const { return mFd; } |
| inline bool isMutable() const { return mMutable; } |
| |
| protected: |
| void init(int fd, void* data, size_t size, bool isMutable); |
| |
| int mFd; // owned by parcel so not closed when released |
| void* mData; |
| size_t mSize; |
| bool mMutable; |
| }; |
| |
| #if defined(__clang__) |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Wweak-vtables" |
| #endif |
| |
| // FlattenableHelperInterface and FlattenableHelper avoid generating a vtable entry in objects |
| // following Flattenable template/protocol. |
| class FlattenableHelperInterface { |
| protected: |
| ~FlattenableHelperInterface() { } |
| public: |
| virtual size_t getFlattenedSize() const = 0; |
| virtual size_t getFdCount() const = 0; |
| virtual status_t flatten(void* buffer, size_t size, int* fds, size_t count) const = 0; |
| virtual status_t unflatten(void const* buffer, size_t size, int const* fds, size_t count) = 0; |
| }; |
| |
| #if defined(__clang__) |
| #pragma clang diagnostic pop |
| #endif |
| |
| // Concrete implementation of FlattenableHelperInterface that delegates virtual calls to the |
| // specified class T implementing the Flattenable protocol. It "virtualizes" a compile-time |
| // protocol. |
| template<typename T> |
| class FlattenableHelper : public FlattenableHelperInterface { |
| friend class Parcel; |
| const Flattenable<T>& val; |
| explicit FlattenableHelper(const Flattenable<T>& _val) : val(_val) { } |
| |
| protected: |
| ~FlattenableHelper() = default; |
| public: |
| virtual size_t getFlattenedSize() const { |
| return val.getFlattenedSize(); |
| } |
| virtual size_t getFdCount() const { |
| return val.getFdCount(); |
| } |
| virtual status_t flatten(void* buffer, size_t size, int* fds, size_t count) const { |
| return val.flatten(buffer, size, fds, count); |
| } |
| virtual status_t unflatten(void const* buffer, size_t size, int const* fds, size_t count) { |
| return const_cast<Flattenable<T>&>(val).unflatten(buffer, size, fds, count); |
| } |
| }; |
| status_t write(const FlattenableHelperInterface& val); |
| status_t read(FlattenableHelperInterface& val) const; |
| |
| public: |
| class ReadableBlob : public Blob { |
| friend class Parcel; |
| public: |
| inline const void* data() const { return mData; } |
| inline void* mutableData() { return isMutable() ? mData : nullptr; } |
| }; |
| |
| class WritableBlob : public Blob { |
| friend class Parcel; |
| public: |
| inline void* data() { return mData; } |
| }; |
| |
| private: |
| size_t mOpenAshmemSize; |
| |
| public: |
| // TODO: Remove once ABI can be changed. |
| size_t getBlobAshmemSize() const; |
| size_t getOpenAshmemSize() const; |
| }; |
| |
| // --------------------------------------------------------------------------- |
| |
| template<typename T> |
| status_t Parcel::write(const Flattenable<T>& val) { |
| const FlattenableHelper<T> helper(val); |
| return write(helper); |
| } |
| |
| template<typename T> |
| status_t Parcel::write(const LightFlattenable<T>& val) { |
| size_t size(val.getFlattenedSize()); |
| if (!val.isFixedSize()) { |
| if (size > INT32_MAX) { |
| return BAD_VALUE; |
| } |
| status_t err = writeInt32(static_cast<int32_t>(size)); |
| if (err != NO_ERROR) { |
| return err; |
| } |
| } |
| if (size) { |
| void* buffer = writeInplace(size); |
| if (buffer == nullptr) |
| return NO_MEMORY; |
| return val.flatten(buffer, size); |
| } |
| return NO_ERROR; |
| } |
| |
| template<typename T> |
| status_t Parcel::read(Flattenable<T>& val) const { |
| FlattenableHelper<T> helper(val); |
| return read(helper); |
| } |
| |
| template<typename T> |
| status_t Parcel::read(LightFlattenable<T>& val) const { |
| size_t size; |
| if (val.isFixedSize()) { |
| size = val.getFlattenedSize(); |
| } else { |
| int32_t s; |
| status_t err = readInt32(&s); |
| if (err != NO_ERROR) { |
| return err; |
| } |
| size = static_cast<size_t>(s); |
| } |
| if (size) { |
| void const* buffer = readInplace(size); |
| return buffer == nullptr ? NO_MEMORY : |
| val.unflatten(buffer, size); |
| } |
| return NO_ERROR; |
| } |
| |
| template<typename T> |
| status_t Parcel::writeVectorSize(const std::vector<T>& val) { |
| if (val.size() > INT32_MAX) { |
| return BAD_VALUE; |
| } |
| return writeInt32(static_cast<int32_t>(val.size())); |
| } |
| |
| template<typename T> |
| status_t Parcel::writeVectorSize(const std::unique_ptr<std::vector<T>>& val) { |
| if (!val) { |
| return writeInt32(-1); |
| } |
| |
| return writeVectorSize(*val); |
| } |
| |
| template<typename T> |
| status_t Parcel::resizeOutVector(std::vector<T>* val) const { |
| int32_t size; |
| status_t err = readInt32(&size); |
| if (err != NO_ERROR) { |
| return err; |
| } |
| |
| if (size < 0) { |
| return UNEXPECTED_NULL; |
| } |
| val->resize(size_t(size)); |
| return OK; |
| } |
| |
| template<typename T> |
| status_t Parcel::resizeOutVector(std::unique_ptr<std::vector<T>>* val) const { |
| int32_t size; |
| status_t err = readInt32(&size); |
| if (err != NO_ERROR) { |
| return err; |
| } |
| |
| val->reset(); |
| if (size >= 0) { |
| val->reset(new std::vector<T>(size_t(size))); |
| } |
| |
| return OK; |
| } |
| |
| template<typename T> |
| status_t Parcel::readStrongBinder(sp<T>* val) const { |
| sp<IBinder> tmp; |
| status_t ret = readStrongBinder(&tmp); |
| |
| if (ret == OK) { |
| *val = interface_cast<T>(tmp); |
| |
| if (val->get() == nullptr) { |
| return UNKNOWN_ERROR; |
| } |
| } |
| |
| return ret; |
| } |
| |
| template<typename T> |
| status_t Parcel::readNullableStrongBinder(sp<T>* val) const { |
| sp<IBinder> tmp; |
| status_t ret = readNullableStrongBinder(&tmp); |
| |
| if (ret == OK) { |
| *val = interface_cast<T>(tmp); |
| |
| if (val->get() == nullptr && tmp.get() != nullptr) { |
| ret = UNKNOWN_ERROR; |
| } |
| } |
| |
| return ret; |
| } |
| |
| template<typename T, typename U> |
| status_t Parcel::unsafeReadTypedVector( |
| std::vector<T>* val, |
| status_t(Parcel::*read_func)(U*) const) const { |
| int32_t size; |
| status_t status = this->readInt32(&size); |
| |
| if (status != OK) { |
| return status; |
| } |
| |
| if (size < 0) { |
| return UNEXPECTED_NULL; |
| } |
| |
| if (val->max_size() < static_cast<size_t>(size)) { |
| return NO_MEMORY; |
| } |
| |
| val->resize(static_cast<size_t>(size)); |
| |
| if (val->size() < static_cast<size_t>(size)) { |
| return NO_MEMORY; |
| } |
| |
| for (auto& v: *val) { |
| status = (this->*read_func)(&v); |
| |
| if (status != OK) { |
| return status; |
| } |
| } |
| |
| return OK; |
| } |
| |
| template<typename T> |
| status_t Parcel::readTypedVector(std::vector<T>* val, |
| status_t(Parcel::*read_func)(T*) const) const { |
| return unsafeReadTypedVector(val, read_func); |
| } |
| |
| template<typename T> |
| status_t Parcel::readNullableTypedVector(std::unique_ptr<std::vector<T>>* val, |
| status_t(Parcel::*read_func)(T*) const) const { |
| const size_t start = dataPosition(); |
| int32_t size; |
| status_t status = readInt32(&size); |
| val->reset(); |
| |
| if (status != OK || size < 0) { |
| return status; |
| } |
| |
| setDataPosition(start); |
| val->reset(new std::vector<T>()); |
| |
| status = unsafeReadTypedVector(val->get(), read_func); |
| |
| if (status != OK) { |
| val->reset(); |
| } |
| |
| return status; |
| } |
| |
| template<typename T, typename U> |
| status_t Parcel::unsafeWriteTypedVector(const std::vector<T>& val, |
| status_t(Parcel::*write_func)(U)) { |
| if (val.size() > std::numeric_limits<int32_t>::max()) { |
| return BAD_VALUE; |
| } |
| |
| status_t status = this->writeInt32(static_cast<int32_t>(val.size())); |
| |
| if (status != OK) { |
| return status; |
| } |
| |
| for (const auto& item : val) { |
| status = (this->*write_func)(item); |
| |
| if (status != OK) { |
| return status; |
| } |
| } |
| |
| return OK; |
| } |
| |
| template<typename T> |
| status_t Parcel::writeTypedVector(const std::vector<T>& val, |
| status_t(Parcel::*write_func)(const T&)) { |
| return unsafeWriteTypedVector(val, write_func); |
| } |
| |
| template<typename T> |
| status_t Parcel::writeTypedVector(const std::vector<T>& val, |
| status_t(Parcel::*write_func)(T)) { |
| return unsafeWriteTypedVector(val, write_func); |
| } |
| |
| template<typename T> |
| status_t Parcel::writeNullableTypedVector(const std::unique_ptr<std::vector<T>>& val, |
| status_t(Parcel::*write_func)(const T&)) { |
| if (val.get() == nullptr) { |
| return this->writeInt32(-1); |
| } |
| |
| return unsafeWriteTypedVector(*val, write_func); |
| } |
| |
| template<typename T> |
| status_t Parcel::writeNullableTypedVector(const std::unique_ptr<std::vector<T>>& val, |
| status_t(Parcel::*write_func)(T)) { |
| if (val.get() == nullptr) { |
| return this->writeInt32(-1); |
| } |
| |
| return unsafeWriteTypedVector(*val, write_func); |
| } |
| |
| template<typename T> |
| status_t Parcel::readParcelableVector(std::vector<T>* val) const { |
| return unsafeReadTypedVector<T, Parcelable>(val, &Parcel::readParcelable); |
| } |
| |
| template<typename T> |
| status_t Parcel::readParcelableVector(std::unique_ptr<std::vector<std::unique_ptr<T>>>* val) const { |
| const size_t start = dataPosition(); |
| int32_t size; |
| status_t status = readInt32(&size); |
| val->reset(); |
| |
| if (status != OK || size < 0) { |
| return status; |
| } |
| |
| setDataPosition(start); |
| val->reset(new std::vector<std::unique_ptr<T>>()); |
| |
| status = unsafeReadTypedVector(val->get(), &Parcel::readParcelable<T>); |
| |
| if (status != OK) { |
| val->reset(); |
| } |
| |
| return status; |
| } |
| |
| template<typename T> |
| status_t Parcel::readParcelable(std::unique_ptr<T>* parcelable) const { |
| const size_t start = dataPosition(); |
| int32_t present; |
| status_t status = readInt32(&present); |
| parcelable->reset(); |
| |
| if (status != OK || !present) { |
| return status; |
| } |
| |
| setDataPosition(start); |
| parcelable->reset(new T()); |
| |
| status = readParcelable(parcelable->get()); |
| |
| if (status != OK) { |
| parcelable->reset(); |
| } |
| |
| return status; |
| } |
| |
| template<typename T> |
| status_t Parcel::writeNullableParcelable(const std::unique_ptr<T>& parcelable) { |
| return writeRawNullableParcelable(parcelable.get()); |
| } |
| |
| template<typename T> |
| status_t Parcel::writeParcelableVector(const std::vector<T>& val) { |
| return unsafeWriteTypedVector<T,const Parcelable&>(val, &Parcel::writeParcelable); |
| } |
| |
| template<typename T> |
| status_t Parcel::writeParcelableVector(const std::unique_ptr<std::vector<std::unique_ptr<T>>>& val) { |
| if (val.get() == nullptr) { |
| return this->writeInt32(-1); |
| } |
| |
| return unsafeWriteTypedVector(*val, &Parcel::writeNullableParcelable<T>); |
| } |
| |
| template<typename T> |
| status_t Parcel::writeParcelableVector(const std::shared_ptr<std::vector<std::unique_ptr<T>>>& val) { |
| if (val.get() == nullptr) { |
| return this->writeInt32(-1); |
| } |
| |
| return unsafeWriteTypedVector(*val, &Parcel::writeNullableParcelable<T>); |
| } |
| |
| // --------------------------------------------------------------------------- |
| |
| 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 |