blob: 560910e403bf9de2cfd9f4bfcc4a6e5f2107af09 [file] [log] [blame]
// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <lib/ui/scenic/cpp/view_ref_pair.h>
#include <zircon/assert.h>
namespace scenic {
ViewRefPair ViewRefPair::New() {
ViewRefPair ref_pair;
auto status = zx::eventpair::create(/*options*/ 0u, &ref_pair.control_ref.reference,
// Assert even in non-debug builds, because eventpair creation can fail under
// normal operation. Failure can occur for example, if the job creation
// policy governing this process forbids eventpair creation.
// It is unlikely that a well-behaved Scenic client would crash here; if you
// hit this, it means something is very abnormal.
ZX_ASSERT(status == ZX_OK);
// Remove duplication from control_ref; Scenic requires it.
ref_pair.control_ref.reference.replace(ZX_DEFAULT_EVENTPAIR_RIGHTS & (~ZX_RIGHT_DUPLICATE),
// Remove signaling from view_ref; Scenic requires it.
ref_pair.view_ref.reference.replace(ZX_RIGHTS_BASIC, &ref_pair.view_ref.reference);
return ref_pair;
} // namespace scenic