mirror of
https://github.com/encounter/dawn-cmake.git
synced 2025-06-06 14:43:31 +00:00
d6cc1fe099
The existing implementation of Result with tagged pointers was not able to handle constant pointers for the result. This is required in follow-up CLs to return internal formats in a ResultOrError. This CL extracts the tagged pointer logic out of Result<T*, E*> so it can be shared with Result<const T*, E*>. Tests are also added to cover Result<const T*, E*>. BUG=dawn:128 Change-Id: Id19ae8e1153bcfcaf94d95ac314faf2b23af6f91 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/9100 Commit-Queue: Kai Ninomiya <kainino@chromium.org> Reviewed-by: Austin Eng <enga@chromium.org> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
31 lines
1.0 KiB
C++
31 lines
1.0 KiB
C++
// Copyright 2019 The Dawn Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "common/Result.h"
|
|
|
|
// Implementation details of the tagged pointer Results
|
|
namespace detail {
|
|
|
|
intptr_t MakePayload(const void* pointer, PayloadType type) {
|
|
intptr_t payload = reinterpret_cast<intptr_t>(pointer);
|
|
ASSERT((payload & 3) == 0);
|
|
return payload | type;
|
|
}
|
|
|
|
PayloadType GetPayloadType(intptr_t payload) {
|
|
return static_cast<PayloadType>(payload & 3);
|
|
}
|
|
|
|
} // namespace detail
|