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Introduce RTC_NO_UNIQUE_ADDRESS.

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This macro introduces the possibility to suggest the compiler that a
data member doesn't need an address different from other non static
data members.

The usage of a macro is to maintain portability since at the moment
the attribute [[no_unique_address]] is only supported by clang
with at least -std=c++11 but it should be supported by all the
compilers starting from C++20.

Bug: webrtc:11495
Change-Id: I9f12b67b4422a2749649eaa6b004a67d5fd572d8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/173331
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32246}
This commit is contained in:
Mirko Bonadei
2020-09-30 10:04:20 +02:00
committed by Commit Bot
parent 1e4d4fdf88
commit f5e261aaf6
52 changed files with 138 additions and 42 deletions
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3
modules/video_coding/codecs/test/videoprocessor.h
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@ -37,6 +37,7 @@
#include "rtc_base/checks.h"
#include "rtc_base/constructor_magic.h"
#include "rtc_base/synchronization/sequence_checker.h"
#include "rtc_base/system/no_unique_address.h"
#include "rtc_base/thread_annotations.h"
#include "rtc_base/thread_checker.h"
#include "test/testsupport/frame_reader.h"
@ -249,7 +250,7 @@ class VideoProcessor {
int64_t post_encode_time_ns_ RTC_GUARDED_BY(sequence_checker_);
// This class must be operated on a TaskQueue.
SequenceChecker sequence_checker_;
RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;
RTC_DISALLOW_COPY_AND_ASSIGN(VideoProcessor);
};