Add a new QUIC platform API quic_aligned.h for the alignment macro definitions.

net/quic/core/quic_framer.cc

 // Copyright (c) 2012 The Chromium 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 "net/quic/core/quic_framer.h"
 
 #include <cstdint>
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "net/quic/core/crypto/crypto_framer.h"
 #include "net/quic/core/crypto/crypto_handshake_message.h"
 #include "net/quic/core/crypto/crypto_protocol.h"
 #include "net/quic/core/crypto/null_decrypter.h"
 #include "net/quic/core/crypto/null_encrypter.h"
 #include "net/quic/core/crypto/quic_decrypter.h"
 #include "net/quic/core/crypto/quic_encrypter.h"
 #include "net/quic/core/quic_bug_tracker.h"
 #include "net/quic/core/quic_data_reader.h"
 #include "net/quic/core/quic_data_writer.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_socket_address_coder.h"
 #include "net/quic/core/quic_utils.h"
+#include "net/quic/platform/api/quic_aligned.h"
 
 using base::ContainsKey;
 using base::StringPiece;
 using std::string;
 #define PREDICT_FALSE(x) (x)
 
 namespace net {
 
 namespace {
 
@@ skipping 487 matching lines @@
   }
 
   bool rv;
   if (perspective_ == Perspective::IS_CLIENT && public_header.version_flag) {
     rv = ProcessVersionNegotiationPacket(&reader, &public_header);
   } else if (public_header.reset_flag) {
     rv = ProcessPublicResetPacket(&reader, public_header);
   } else if (packet.length() <= kMaxPacketSize) {
     // The optimized decryption algorithm implementations run faster when
     // operating on aligned memory.
-    //
-    // TODO(rtenneti): Change the default 64 alignas value (used the default
-    // value from CACHELINE_SIZE).
-    ALIGNAS(64) char buffer[kMaxPacketSize];
+    QUIC_CACHELINE_ALIGNED char buffer[kMaxPacketSize];
     rv = ProcessDataPacket(&reader, public_header, packet, buffer,
                            kMaxPacketSize);
   } else {
     std::unique_ptr<char[]> large_buffer(new char[packet.length()]);
     rv = ProcessDataPacket(&reader, public_header, packet, large_buffer.get(),
                            packet.length());
     QUIC_BUG_IF(rv) << "QUIC should never successfully process packets larger"
                     << "than kMaxPacketSize. packet size:" << packet.length();
   }
 
@@ skipping 1654 matching lines @@
 
 bool QuicFramer::RaiseError(QuicErrorCode error) {
   DVLOG(1) << ENDPOINT << "Error: " << QuicErrorCodeToString(error)
            << " detail: " << detailed_error_;
   set_error(error);
   visitor_->OnError(this);
   return false;
 }
 
 }  // namespace net