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Bug 1440511 - Part 4: Add an IPDLParamTraits implementation for FileDescriptor, r=froydnj

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MozReview-Commit-ID: R1CiT5IvAi
This commit is contained in:
Nika Layzell 2018-02-22 16:54:35 -05:00
parent 36059eb187
commit 896117c019
2 changed files with 44 additions and 1 deletions
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35
ipc/glue/FileDescriptor.cpp
View File

@ -29,7 +29,8 @@
#endif // XP_WIN
using mozilla::ipc::FileDescriptor;
namespace mozilla {
namespace ipc {
FileDescriptor::FileDescriptor()
: mHandle(INVALID_HANDLE)
@ -224,3 +225,35 @@ FileDescriptor::PlatformHandleDeleter::operator()(FileDescriptor::PlatformHandle
{
FileDescriptor::Close(aHelper);
}
void
IPDLParamTraits<FileDescriptor>::Write(IPC::Message* aMsg,
IProtocol* aActor,
const FileDescriptor& aParam)
{
FileDescriptor::PickleType pfd =
aParam.ShareTo(FileDescriptor::IPDLPrivate(), aActor->OtherPid());
WriteIPDLParam(aMsg, aActor, pfd);
}
bool
IPDLParamTraits<FileDescriptor>::Read(const IPC::Message* aMsg,
PickleIterator* aIter,
IProtocol* aActor,
FileDescriptor* aResult)
{
FileDescriptor::PickleType pfd;
if (!ReadIPDLParam(aMsg, aIter, aActor, &pfd)) {
return false;
}
*aResult = FileDescriptor(FileDescriptor::IPDLPrivate(), pfd);
if (!aResult->IsValid()) {
printf_stderr("IPDL protocol Error: [%s] Received an invalid file descriptor\n",
aActor->ProtocolName());
}
return true;
}
} // namespace ipc
} // namespace mozilla

10
ipc/glue/FileDescriptor.h
View File

@ -10,6 +10,8 @@
#include "base/basictypes.h"
#include "base/process.h"
#include "mozilla/UniquePtr.h"
#include "ipc/IPCMessageUtils.h"
#include "mozilla/ipc/IPDLParamTraits.h"
#ifdef XP_WIN
// Need the HANDLE typedef.
@ -135,6 +137,14 @@ private:
PlatformHandleType mHandle;
};
template<>
struct IPDLParamTraits<FileDescriptor> {
typedef FileDescriptor paramType;
static void Write(IPC::Message* aMsg, IProtocol* aActor, const paramType& aParam);
static bool Read(const IPC::Message* aMsg, PickleIterator* aIter, IProtocol* aActor, paramType* aResult);
};
} // namespace ipc
} // namespace mozilla