firefox-main/gfx/layers/ipc/IOSurfacePort.h (file symbol)

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/* 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_gfx_IOSurfacePort_h_
#define mozilla_gfx_IOSurfacePort_h_
#include "chrome/common/ipc_message_utils.h"
#ifdef XP_DARWIN
# include "mozilla/UniquePtrExtensions.h"
template <typename T>
class CFTypeRefPtr;
struct __IOSurface;
typedef __IOSurface* IOSurfaceRef;
#endif
// This header file defines an IOSurface struct.
//
// It is a separate file for the following reasons:
// - Forward-declaring CFTypeRefPtr<IOSurfaceRef> correctly is tricky.
// - IOSurfaceRef.h defines global types like "Point" which can interfere with
// name resolution.
// - Smaller header files allow limiting the scope of the name pollution.
namespace mozilla::layers {
// The IPC descriptor for an IOSurface.
// As long as the port is alive, the IOSurface is automatically marked as "in
// use", including while the port is in IPC transit.
struct IOSurfacePort {
#ifdef XP_DARWIN
UniqueMachSendRight mPort;
CFTypeRefPtr<IOSurfaceRef> GetSurface() const;
static IOSurfacePort FromSurface(const CFTypeRefPtr<IOSurfaceRef>& aSurface);
bool operator==(const IOSurfacePort& aOther) const;
#endif
};
} // namespace mozilla::layers
namespace IPC {
template <>
struct ParamTraits<mozilla::layers::IOSurfacePort> {
using paramType = mozilla::layers::IOSurfacePort;
static void Write(MessageWriter* writer, paramType&& param) {
#ifdef XP_DARWIN
WriteParam(writer, std::move(param.mPort));
#endif
}
static bool Read(MessageReader* reader, paramType* result) {
#ifdef XP_DARWIN
return ReadParam(reader, &result->mPort);
#else
return true;
#endif
}
};
} // namespace IPC
#endif /* mozilla_gfx_IOSurfacePort_h_ */