mirror of
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7f89fb24f2
MozReview-Commit-ID: HF27bYPH7Uq --HG-- extra : rebase_source : 3b919d462068d76862e38401be1db9add1aebd05
853 lines
22 KiB
C++
853 lines
22 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __IPC_GLUE_IPCMESSAGEUTILS_H__
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#define __IPC_GLUE_IPCMESSAGEUTILS_H__
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#include "base/process_util.h"
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#include "chrome/common/ipc_message_utils.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/dom/ipc/StructuredCloneData.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/net/WebSocketFrame.h"
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#include "mozilla/TimeStamp.h"
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#ifdef XP_WIN
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#include "mozilla/TimeStamp_windows.h"
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#endif
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#include "mozilla/TypeTraits.h"
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#include "mozilla/IntegerTypeTraits.h"
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#include <stdint.h>
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#ifdef MOZ_CRASHREPORTER
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#include "nsExceptionHandler.h"
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#endif
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#include "nsID.h"
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#include "nsIWidget.h"
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#include "nsMemory.h"
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#include "nsString.h"
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#include "nsTArray.h"
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#include "js/StructuredClone.h"
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#include "nsCSSPropertyID.h"
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#ifdef _MSC_VER
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#pragma warning( disable : 4800 )
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#endif
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#if !defined(OS_POSIX)
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// This condition must be kept in sync with the one in
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// ipc_message_utils.h, but this dummy definition of
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// base::FileDescriptor acts as a static assert that we only get one
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// def or the other (or neither, in which case code using
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// FileDescriptor fails to build)
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namespace base { struct FileDescriptor { }; }
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#endif
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namespace mozilla {
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// This is a cross-platform approximation to HANDLE, which we expect
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// to be typedef'd to void* or thereabouts.
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typedef uintptr_t WindowsHandle;
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// XXX there are out of place and might be generally useful. Could
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// move to nscore.h or something.
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struct void_t {
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bool operator==(const void_t&) const { return true; }
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};
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struct null_t {
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bool operator==(const null_t&) const { return true; }
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};
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struct SerializedStructuredCloneBuffer final
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{
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SerializedStructuredCloneBuffer&
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operator=(const SerializedStructuredCloneBuffer& aOther)
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{
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data.Clear();
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auto iter = aOther.data.Iter();
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while (!iter.Done()) {
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data.WriteBytes(iter.Data(), iter.RemainingInSegment());
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iter.Advance(aOther.data, iter.RemainingInSegment());
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}
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return *this;
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}
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bool
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operator==(const SerializedStructuredCloneBuffer& aOther) const
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{
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// The copy assignment operator and the equality operator are
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// needed by the IPDL generated code. We relied on the copy
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// assignment operator at some places but we never use the
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// equality operator.
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return false;
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}
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JSStructuredCloneData data;
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};
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} // namespace mozilla
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namespace IPC {
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/**
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* Maximum size, in bytes, of a single IPC message.
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*/
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static const uint32_t MAX_MESSAGE_SIZE = 65536;
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/**
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* Generic enum serializer.
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*
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* Consider using the specializations below, such as ContiguousEnumSerializer.
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*
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* This is a generic serializer for any enum type used in IPDL.
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* Programmers can define ParamTraits<E> for enum type E by deriving
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* EnumSerializer<E, MyEnumValidator> where MyEnumValidator is a struct
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* that has to define a static IsLegalValue function returning whether
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* a given value is a legal value of the enum type at hand.
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*
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* \sa https://developer.mozilla.org/en/IPDL/Type_Serialization
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*/
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template <typename E, typename EnumValidator>
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struct EnumSerializer {
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typedef E paramType;
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typedef typename mozilla::UnsignedStdintTypeForSize<sizeof(paramType)>::Type
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uintParamType;
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static void Write(Message* aMsg, const paramType& aValue) {
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MOZ_ASSERT(EnumValidator::IsLegalValue(aValue));
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WriteParam(aMsg, uintParamType(aValue));
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult) {
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uintParamType value;
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if (!ReadParam(aMsg, aIter, &value)) {
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#ifdef MOZ_CRASHREPORTER
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CrashReporter::AnnotateCrashReport(NS_LITERAL_CSTRING("IPCReadErrorReason"),
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NS_LITERAL_CSTRING("Bad iter"));
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#endif
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return false;
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} else if (!EnumValidator::IsLegalValue(paramType(value))) {
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#ifdef MOZ_CRASHREPORTER
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CrashReporter::AnnotateCrashReport(NS_LITERAL_CSTRING("IPCReadErrorReason"),
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NS_LITERAL_CSTRING("Illegal value"));
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#endif
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return false;
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}
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*aResult = paramType(value);
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return true;
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}
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};
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template <typename E,
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E MinLegal,
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E HighBound>
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class ContiguousEnumValidator
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{
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// Silence overzealous -Wtype-limits bug in GCC fixed in GCC 4.8:
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// "comparison of unsigned expression >= 0 is always true"
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// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11856
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template <typename T>
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static bool IsLessThanOrEqual(T a, T b) { return a <= b; }
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public:
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static bool IsLegalValue(E e)
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{
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return IsLessThanOrEqual(MinLegal, e) && e < HighBound;
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}
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};
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template <typename E,
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E AllBits>
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struct BitFlagsEnumValidator
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{
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static bool IsLegalValue(E e)
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{
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return (e & AllBits) == e;
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}
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};
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/**
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* Specialization of EnumSerializer for enums with contiguous enum values.
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*
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* Provide two values: MinLegal, HighBound. An enum value x will be
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* considered legal if MinLegal <= x < HighBound.
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*
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* For example, following is definition of serializer for enum type FOO.
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* \code
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* enum FOO { FOO_FIRST, FOO_SECOND, FOO_LAST, NUM_FOO };
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*
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* template <>
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* struct ParamTraits<FOO>:
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* public ContiguousEnumSerializer<FOO, FOO_FIRST, NUM_FOO> {};
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* \endcode
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* FOO_FIRST, FOO_SECOND, and FOO_LAST are valid value.
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*/
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template <typename E,
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E MinLegal,
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E HighBound>
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struct ContiguousEnumSerializer
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: EnumSerializer<E,
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ContiguousEnumValidator<E, MinLegal, HighBound>>
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{};
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/**
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* Specialization of EnumSerializer for enums representing bit flags.
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*
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* Provide one value: AllBits. An enum value x will be
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* considered legal if (x & AllBits) == x;
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*
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* Example:
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* \code
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* enum FOO {
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* FOO_FIRST = 1 << 0,
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* FOO_SECOND = 1 << 1,
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* FOO_LAST = 1 << 2,
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* ALL_BITS = (1 << 3) - 1
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* };
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*
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* template <>
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* struct ParamTraits<FOO>:
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* public BitFlagsEnumSerializer<FOO, FOO::ALL_BITS> {};
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* \endcode
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*/
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template <typename E,
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E AllBits>
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struct BitFlagsEnumSerializer
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: EnumSerializer<E,
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BitFlagsEnumValidator<E, AllBits>>
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{};
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template <>
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struct ParamTraits<base::ChildPrivileges>
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: public ContiguousEnumSerializer<base::ChildPrivileges,
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base::PRIVILEGES_DEFAULT,
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base::PRIVILEGES_LAST>
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{ };
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template<>
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struct ParamTraits<int8_t>
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{
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typedef int8_t paramType;
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static void Write(Message* aMsg, const paramType& aParam)
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{
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aMsg->WriteBytes(&aParam, sizeof(aParam));
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
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{
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return aMsg->ReadBytesInto(aIter, aResult, sizeof(*aResult));
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}
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};
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template<>
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struct ParamTraits<uint8_t>
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{
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typedef uint8_t paramType;
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static void Write(Message* aMsg, const paramType& aParam)
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{
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aMsg->WriteBytes(&aParam, sizeof(aParam));
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
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{
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return aMsg->ReadBytesInto(aIter, aResult, sizeof(*aResult));
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}
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};
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#if !defined(OS_POSIX)
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// See above re: keeping definitions in sync
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template<>
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struct ParamTraits<base::FileDescriptor>
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{
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typedef base::FileDescriptor paramType;
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static void Write(Message* aMsg, const paramType& aParam) {
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MOZ_CRASH("FileDescriptor isn't meaningful on this platform");
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult) {
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MOZ_CRASH("FileDescriptor isn't meaningful on this platform");
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return false;
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}
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};
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#endif // !defined(OS_POSIX)
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template <>
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struct ParamTraits<nsACString>
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{
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typedef nsACString paramType;
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static void Write(Message* aMsg, const paramType& aParam)
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{
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bool isVoid = aParam.IsVoid();
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aMsg->WriteBool(isVoid);
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if (isVoid)
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// represents a nullptr pointer
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return;
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uint32_t length = aParam.Length();
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WriteParam(aMsg, length);
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aMsg->WriteBytes(aParam.BeginReading(), length);
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
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{
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bool isVoid;
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if (!aMsg->ReadBool(aIter, &isVoid))
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return false;
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if (isVoid) {
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aResult->SetIsVoid(true);
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return true;
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}
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uint32_t length;
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if (!ReadParam(aMsg, aIter, &length)) {
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return false;
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}
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aResult->SetLength(length);
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return aMsg->ReadBytesInto(aIter, aResult->BeginWriting(), length);
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}
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static void Log(const paramType& aParam, std::wstring* aLog)
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{
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if (aParam.IsVoid())
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aLog->append(L"(NULL)");
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else
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aLog->append(UTF8ToWide(aParam.BeginReading()));
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}
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};
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template <>
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struct ParamTraits<nsAString>
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{
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typedef nsAString paramType;
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static void Write(Message* aMsg, const paramType& aParam)
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{
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bool isVoid = aParam.IsVoid();
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aMsg->WriteBool(isVoid);
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if (isVoid)
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// represents a nullptr pointer
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return;
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uint32_t length = aParam.Length();
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WriteParam(aMsg, length);
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aMsg->WriteBytes(aParam.BeginReading(), length * sizeof(char16_t));
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}
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
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{
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bool isVoid;
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if (!aMsg->ReadBool(aIter, &isVoid))
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return false;
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if (isVoid) {
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aResult->SetIsVoid(true);
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return true;
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}
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uint32_t length;
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if (!ReadParam(aMsg, aIter, &length)) {
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return false;
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}
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aResult->SetLength(length);
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return aMsg->ReadBytesInto(aIter, aResult->BeginWriting(), length * sizeof(char16_t));
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}
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static void Log(const paramType& aParam, std::wstring* aLog)
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{
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if (aParam.IsVoid())
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aLog->append(L"(NULL)");
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else {
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#ifdef WCHAR_T_IS_UTF16
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aLog->append(reinterpret_cast<const wchar_t*>(aParam.BeginReading()));
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#else
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uint32_t length = aParam.Length();
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for (uint32_t index = 0; index < length; index++) {
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aLog->push_back(std::wstring::value_type(aParam[index]));
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}
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#endif
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}
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}
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};
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template <>
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struct ParamTraits<nsCString> : ParamTraits<nsACString>
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{
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typedef nsCString paramType;
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};
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template <>
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struct ParamTraits<nsLiteralCString> : ParamTraits<nsACString>
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{
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typedef nsLiteralCString paramType;
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};
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#ifdef MOZILLA_INTERNAL_API
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template<>
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struct ParamTraits<nsAutoCString> : ParamTraits<nsCString>
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{
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typedef nsAutoCString paramType;
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};
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#endif // MOZILLA_INTERNAL_API
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template <>
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struct ParamTraits<nsString> : ParamTraits<nsAString>
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{
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typedef nsString paramType;
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};
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template <>
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struct ParamTraits<nsLiteralString> : ParamTraits<nsAString>
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{
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typedef nsLiteralString paramType;
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};
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template <>
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struct ParamTraits<nsDependentSubstring> : ParamTraits<nsAString>
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{
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typedef nsDependentSubstring paramType;
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};
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template <>
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struct ParamTraits<nsDependentCSubstring> : ParamTraits<nsACString>
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{
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typedef nsDependentCSubstring paramType;
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};
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#ifdef MOZILLA_INTERNAL_API
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template<>
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struct ParamTraits<nsAutoString> : ParamTraits<nsString>
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{
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typedef nsAutoString paramType;
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};
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#endif // MOZILLA_INTERNAL_API
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// Pickle::ReadBytes and ::WriteBytes take the length in ints, so we must
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// ensure there is no overflow. This returns |false| if it would overflow.
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// Otherwise, it returns |true| and places the byte length in |aByteLength|.
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bool ByteLengthIsValid(uint32_t aNumElements, size_t aElementSize, int* aByteLength);
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// Note: IPDL will sometimes codegen specialized implementations of
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// nsTArray serialization and deserialization code in
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// implementSpecialArrayPickling(). This is needed when ParamTraits<E>
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// is not defined.
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template <typename E>
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struct ParamTraits<nsTArray<E>>
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{
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typedef nsTArray<E> paramType;
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// We write arrays of integer or floating-point data using a single pickling
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// call, rather than writing each element individually. We deliberately do
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// not use mozilla::IsPod here because it is perfectly reasonable to have
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// a data structure T for which IsPod<T>::value is true, yet also have a
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// ParamTraits<T> specialization.
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static const bool sUseWriteBytes = (mozilla::IsIntegral<E>::value ||
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mozilla::IsFloatingPoint<E>::value);
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static void Write(Message* aMsg, const paramType& aParam)
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{
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uint32_t length = aParam.Length();
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WriteParam(aMsg, length);
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if (sUseWriteBytes) {
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int pickledLength = 0;
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MOZ_RELEASE_ASSERT(ByteLengthIsValid(length, sizeof(E), &pickledLength));
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aMsg->WriteBytes(aParam.Elements(), pickledLength);
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} else {
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const E* elems = aParam.Elements();
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for (uint32_t index = 0; index < length; index++) {
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WriteParam(aMsg, elems[index]);
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}
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}
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}
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// This method uses infallible allocation so that an OOM failure will
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// show up as an OOM crash rather than an IPC FatalError.
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
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{
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uint32_t length;
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if (!ReadParam(aMsg, aIter, &length)) {
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return false;
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}
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if (sUseWriteBytes) {
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int pickledLength = 0;
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if (!ByteLengthIsValid(length, sizeof(E), &pickledLength)) {
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return false;
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}
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E* elements = aResult->AppendElements(length);
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return aMsg->ReadBytesInto(aIter, elements, pickledLength);
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} else {
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aResult->SetCapacity(length);
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for (uint32_t index = 0; index < length; index++) {
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E* element = aResult->AppendElement();
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if (!ReadParam(aMsg, aIter, element)) {
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return false;
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}
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}
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return true;
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}
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}
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static void Log(const paramType& aParam, std::wstring* aLog)
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{
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for (uint32_t index = 0; index < aParam.Length(); index++) {
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if (index) {
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aLog->append(L" ");
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}
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LogParam(aParam[index], aLog);
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}
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}
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};
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template<typename E>
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struct ParamTraits<FallibleTArray<E>>
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{
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typedef FallibleTArray<E> paramType;
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static void Write(Message* aMsg, const paramType& aParam)
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{
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WriteParam(aMsg, static_cast<const nsTArray<E>&>(aParam));
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}
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// Deserialize the array infallibly, but return a FallibleTArray.
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static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
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{
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nsTArray<E> temp;
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if (!ReadParam(aMsg, aIter, &temp))
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return false;
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aResult->SwapElements(temp);
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return true;
|
|
}
|
|
|
|
static void Log(const paramType& aParam, std::wstring* aLog)
|
|
{
|
|
LogParam(static_cast<const nsTArray<E>&>(aParam), aLog);
|
|
}
|
|
};
|
|
|
|
template<typename E, size_t N>
|
|
struct ParamTraits<AutoTArray<E, N>> : ParamTraits<nsTArray<E>>
|
|
{
|
|
typedef AutoTArray<E, N> paramType;
|
|
};
|
|
|
|
template<>
|
|
struct ParamTraits<float>
|
|
{
|
|
typedef float paramType;
|
|
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
aMsg->WriteBytes(&aParam, sizeof(paramType));
|
|
}
|
|
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
return aMsg->ReadBytesInto(aIter, aResult, sizeof(*aResult));
|
|
}
|
|
|
|
static void Log(const paramType& aParam, std::wstring* aLog)
|
|
{
|
|
aLog->append(StringPrintf(L"%g", aParam));
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct ParamTraits<nsCSSPropertyID>
|
|
: public ContiguousEnumSerializer<nsCSSPropertyID,
|
|
eCSSProperty_UNKNOWN,
|
|
eCSSProperty_COUNT>
|
|
{};
|
|
|
|
template<>
|
|
struct ParamTraits<mozilla::void_t>
|
|
{
|
|
typedef mozilla::void_t paramType;
|
|
static void Write(Message* aMsg, const paramType& aParam) { }
|
|
static bool
|
|
Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
*aResult = paramType();
|
|
return true;
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct ParamTraits<mozilla::null_t>
|
|
{
|
|
typedef mozilla::null_t paramType;
|
|
static void Write(Message* aMsg, const paramType& aParam) { }
|
|
static bool
|
|
Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
*aResult = paramType();
|
|
return true;
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct ParamTraits<nsID>
|
|
{
|
|
typedef nsID paramType;
|
|
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
WriteParam(aMsg, aParam.m0);
|
|
WriteParam(aMsg, aParam.m1);
|
|
WriteParam(aMsg, aParam.m2);
|
|
for (unsigned int i = 0; i < mozilla::ArrayLength(aParam.m3); i++) {
|
|
WriteParam(aMsg, aParam.m3[i]);
|
|
}
|
|
}
|
|
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
if(!ReadParam(aMsg, aIter, &(aResult->m0)) ||
|
|
!ReadParam(aMsg, aIter, &(aResult->m1)) ||
|
|
!ReadParam(aMsg, aIter, &(aResult->m2)))
|
|
return false;
|
|
|
|
for (unsigned int i = 0; i < mozilla::ArrayLength(aResult->m3); i++)
|
|
if (!ReadParam(aMsg, aIter, &(aResult->m3[i])))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void Log(const paramType& aParam, std::wstring* aLog)
|
|
{
|
|
aLog->append(L"{");
|
|
aLog->append(StringPrintf(L"%8.8X-%4.4X-%4.4X-",
|
|
aParam.m0,
|
|
aParam.m1,
|
|
aParam.m2));
|
|
for (unsigned int i = 0; i < mozilla::ArrayLength(aParam.m3); i++)
|
|
aLog->append(StringPrintf(L"%2.2X", aParam.m3[i]));
|
|
aLog->append(L"}");
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct ParamTraits<mozilla::TimeDuration>
|
|
{
|
|
typedef mozilla::TimeDuration paramType;
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
WriteParam(aMsg, aParam.mValue);
|
|
}
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
return ReadParam(aMsg, aIter, &aResult->mValue);
|
|
};
|
|
};
|
|
|
|
template<>
|
|
struct ParamTraits<mozilla::TimeStamp>
|
|
{
|
|
typedef mozilla::TimeStamp paramType;
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
WriteParam(aMsg, aParam.mValue);
|
|
}
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
return ReadParam(aMsg, aIter, &aResult->mValue);
|
|
};
|
|
};
|
|
|
|
#ifdef XP_WIN
|
|
|
|
template<>
|
|
struct ParamTraits<mozilla::TimeStampValue>
|
|
{
|
|
typedef mozilla::TimeStampValue paramType;
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
WriteParam(aMsg, aParam.mGTC);
|
|
WriteParam(aMsg, aParam.mQPC);
|
|
WriteParam(aMsg, aParam.mHasQPC);
|
|
WriteParam(aMsg, aParam.mIsNull);
|
|
}
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
return (ReadParam(aMsg, aIter, &aResult->mGTC) &&
|
|
ReadParam(aMsg, aIter, &aResult->mQPC) &&
|
|
ReadParam(aMsg, aIter, &aResult->mHasQPC) &&
|
|
ReadParam(aMsg, aIter, &aResult->mIsNull));
|
|
}
|
|
};
|
|
|
|
#endif
|
|
|
|
template <>
|
|
struct ParamTraits<mozilla::dom::ipc::StructuredCloneData>
|
|
{
|
|
typedef mozilla::dom::ipc::StructuredCloneData paramType;
|
|
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
aParam.WriteIPCParams(aMsg);
|
|
}
|
|
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
return aResult->ReadIPCParams(aMsg, aIter);
|
|
}
|
|
|
|
static void Log(const paramType& aParam, std::wstring* aLog)
|
|
{
|
|
LogParam(aParam.DataLength(), aLog);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct ParamTraits<mozilla::net::WebSocketFrameData>
|
|
{
|
|
typedef mozilla::net::WebSocketFrameData paramType;
|
|
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
aParam.WriteIPCParams(aMsg);
|
|
}
|
|
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
return aResult->ReadIPCParams(aMsg, aIter);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct ParamTraits<JSStructuredCloneData>
|
|
{
|
|
typedef JSStructuredCloneData paramType;
|
|
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
MOZ_ASSERT(!(aParam.Size() % sizeof(uint64_t)));
|
|
WriteParam(aMsg, aParam.Size());
|
|
auto iter = aParam.Iter();
|
|
while (!iter.Done()) {
|
|
aMsg->WriteBytes(iter.Data(), iter.RemainingInSegment(), sizeof(uint64_t));
|
|
iter.Advance(aParam, iter.RemainingInSegment());
|
|
}
|
|
}
|
|
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
size_t length = 0;
|
|
if (!ReadParam(aMsg, aIter, &length)) {
|
|
return false;
|
|
}
|
|
MOZ_ASSERT(!(length % sizeof(uint64_t)));
|
|
|
|
mozilla::BufferList<InfallibleAllocPolicy> buffers(0, 0, 4096);
|
|
|
|
// Borrowing is not suitable to use for IPC to hand out data
|
|
// because we often want to store the data somewhere for
|
|
// processing after IPC has released the underlying buffers. One
|
|
// case is PContentChild::SendGetXPCOMProcessAttributes. We can't
|
|
// return a borrowed buffer because the out param outlives the
|
|
// IPDL callback.
|
|
if (length && !aMsg->ExtractBuffers(aIter, length, &buffers, sizeof(uint64_t))) {
|
|
return false;
|
|
}
|
|
|
|
bool success;
|
|
mozilla::BufferList<js::SystemAllocPolicy> out =
|
|
buffers.MoveFallible<js::SystemAllocPolicy>(&success);
|
|
if (!success) {
|
|
return false;
|
|
}
|
|
|
|
*aResult = JSStructuredCloneData(Move(out));
|
|
|
|
return true;
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct ParamTraits<mozilla::SerializedStructuredCloneBuffer>
|
|
{
|
|
typedef mozilla::SerializedStructuredCloneBuffer paramType;
|
|
|
|
static void Write(Message* aMsg, const paramType& aParam)
|
|
{
|
|
WriteParam(aMsg, aParam.data);
|
|
}
|
|
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
|
|
{
|
|
return ReadParam(aMsg, aIter, &aResult->data);
|
|
}
|
|
|
|
static void Log(const paramType& aParam, std::wstring* aLog)
|
|
{
|
|
LogParam(aParam.data.Size(), aLog);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct ParamTraits<nsIWidget::TouchPointerState>
|
|
: public BitFlagsEnumSerializer<nsIWidget::TouchPointerState,
|
|
nsIWidget::TouchPointerState::ALL_BITS>
|
|
{
|
|
};
|
|
|
|
template<class T>
|
|
struct ParamTraits<mozilla::Maybe<T>>
|
|
{
|
|
typedef mozilla::Maybe<T> paramType;
|
|
|
|
static void Write(Message* msg, const paramType& param)
|
|
{
|
|
if (param.isSome()) {
|
|
WriteParam(msg, true);
|
|
WriteParam(msg, param.value());
|
|
} else {
|
|
WriteParam(msg, false);
|
|
}
|
|
}
|
|
|
|
static bool Read(const Message* msg, PickleIterator* iter, paramType* result)
|
|
{
|
|
bool isSome;
|
|
if (!ReadParam(msg, iter, &isSome)) {
|
|
return false;
|
|
}
|
|
if (isSome) {
|
|
T tmp;
|
|
if (!ReadParam(msg, iter, &tmp)) {
|
|
return false;
|
|
}
|
|
*result = mozilla::Some(mozilla::Move(tmp));
|
|
} else {
|
|
*result = mozilla::Nothing();
|
|
}
|
|
return true;
|
|
}
|
|
};
|
|
|
|
} /* namespace IPC */
|
|
|
|
#endif /* __IPC_GLUE_IPCMESSAGEUTILS_H__ */
|