| // 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, |
| &ref_pair.view_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), |
| &ref_pair.control_ref.reference); |
| |
| // 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 |
