mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-01 00:32:11 +00:00
265e672179
# ignore-this-changeset --HG-- extra : amend_source : 4d301d3b0b8711c4692392aa76088ba7fd7d1022
109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_ipc_Transport_win_h
|
|
#define mozilla_ipc_Transport_win_h 1
|
|
|
|
#include <string>
|
|
|
|
#include "base/process.h"
|
|
#include "ipc/IPCMessageUtils.h"
|
|
#include "nsWindowsHelpers.h"
|
|
|
|
namespace mozilla {
|
|
namespace ipc {
|
|
|
|
struct TransportDescriptor {
|
|
std::wstring mPipeName;
|
|
HANDLE mServerPipeHandle;
|
|
base::ProcessId mDestinationProcessId;
|
|
};
|
|
|
|
HANDLE
|
|
TransferHandleToProcess(HANDLE source, base::ProcessId pid);
|
|
|
|
} // namespace ipc
|
|
} // namespace mozilla
|
|
|
|
namespace IPC {
|
|
|
|
template <>
|
|
struct ParamTraits<mozilla::ipc::TransportDescriptor> {
|
|
typedef mozilla::ipc::TransportDescriptor paramType;
|
|
static void Write(Message* aMsg, const paramType& aParam) {
|
|
HANDLE pipe = mozilla::ipc::TransferHandleToProcess(
|
|
aParam.mServerPipeHandle, aParam.mDestinationProcessId);
|
|
DWORD duplicateFromProcessId = 0;
|
|
if (!pipe) {
|
|
if (XRE_IsParentProcess()) {
|
|
// If we are the parent and failed to transfer then there is no hope,
|
|
// just close the handle.
|
|
::CloseHandle(aParam.mServerPipeHandle);
|
|
} else {
|
|
// We are probably sending to parent so it should be able to duplicate.
|
|
pipe = aParam.mServerPipeHandle;
|
|
duplicateFromProcessId = ::GetCurrentProcessId();
|
|
}
|
|
}
|
|
|
|
WriteParam(aMsg, aParam.mPipeName);
|
|
WriteParam(aMsg, pipe);
|
|
WriteParam(aMsg, duplicateFromProcessId);
|
|
WriteParam(aMsg, aParam.mDestinationProcessId);
|
|
}
|
|
static bool Read(const Message* aMsg, PickleIterator* aIter,
|
|
paramType* aResult) {
|
|
DWORD duplicateFromProcessId;
|
|
bool r = (ReadParam(aMsg, aIter, &aResult->mPipeName) &&
|
|
ReadParam(aMsg, aIter, &aResult->mServerPipeHandle) &&
|
|
ReadParam(aMsg, aIter, &duplicateFromProcessId) &&
|
|
ReadParam(aMsg, aIter, &aResult->mDestinationProcessId));
|
|
if (!r) {
|
|
return r;
|
|
}
|
|
|
|
MOZ_RELEASE_ASSERT(
|
|
aResult->mServerPipeHandle,
|
|
"Main process failed to duplicate pipe handle to child.");
|
|
|
|
// If this is a not the "server" side descriptor, we have finished.
|
|
if (aResult->mServerPipeHandle == INVALID_HANDLE_VALUE) {
|
|
return true;
|
|
}
|
|
|
|
MOZ_RELEASE_ASSERT(aResult->mDestinationProcessId ==
|
|
base::GetCurrentProcId());
|
|
|
|
// If the pipe has already been duplicated to us, we have finished.
|
|
if (!duplicateFromProcessId) {
|
|
return true;
|
|
}
|
|
|
|
// Otherwise duplicate the handle to us.
|
|
nsAutoHandle sourceProcess(
|
|
::OpenProcess(PROCESS_DUP_HANDLE, FALSE, duplicateFromProcessId));
|
|
if (!sourceProcess) {
|
|
return false;
|
|
}
|
|
|
|
HANDLE ourHandle;
|
|
BOOL duped = ::DuplicateHandle(
|
|
sourceProcess, aResult->mServerPipeHandle, ::GetCurrentProcess(),
|
|
&ourHandle, 0, FALSE, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
|
|
if (!duped) {
|
|
aResult->mServerPipeHandle = INVALID_HANDLE_VALUE;
|
|
return false;
|
|
}
|
|
|
|
aResult->mServerPipeHandle = ourHandle;
|
|
return true;
|
|
}
|
|
};
|
|
|
|
} // namespace IPC
|
|
|
|
#endif // mozilla_ipc_Transport_win_h
|