Export of internal Abseil changes

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d8ddeda8e52132b908fae89b25f117a055d78c04 by Abseil Team <absl-team@google.com>:

Improve performance of ByteStringFromAscii by changing kHexValue to have -1 in invalid value slots. This way a single load can do both the validation and conversion.

PiperOrigin-RevId: 284167344

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5037e97e2eaaac8ced9a5290949deda4b43b9ceb by Mark Barolak <mbar@google.com>:

Change the underlying symbol name of Cord to absl::Cord.

PiperOrigin-RevId: 284005429

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4ef66c72aedf135f2b4fd0ba7a73de6642decfff by Abseil Team <absl-team@google.com>:

Eliminate an unnecessary load when futex is contended in Waiter::Wait()

The first argument to compare_exchange_weak() is a reference and will be
updated upon failure.  There is no need to do an additional load on the
same variable.

PiperOrigin-RevId: 284002752
GitOrigin-RevId: d8ddeda8e52132b908fae89b25f117a055d78c04
Change-Id: Idac68a1901eb8c30050adc3860765b1a6fa085c7

3 files changed, 7 insertions, 6 deletions

diff --git a/absl/strings/internal/str_format/arg.h b/absl/strings/internal/str_format/arg.h
index 2119ca0036e5..79416cc8bc62 100644
--- a/absl/strings/internal/str_format/arg.h
+++ b/absl/strings/internal/str_format/arg.h
@@ -18,11 +18,11 @@
 #include "absl/strings/internal/str_format/extension.h"
 #include "absl/strings/string_view.h"
 
-class Cord;
 class CordReader;
 
 namespace absl {
 
+class Cord;
 class FormatCountCapture;
 class FormatSink;
 
@@ -67,7 +67,7 @@ ConvertResult<Conv::s | Conv::p> FormatConvertImpl(const char* v,
                                                    FormatSinkImpl* sink);
 template <class AbslCord,
           typename std::enable_if<
-              std::is_same<AbslCord, ::Cord>::value>::type* = nullptr,
+              std::is_same<AbslCord, absl::Cord>::value>::type* = nullptr,
           class AbslCordReader = ::CordReader>
 ConvertResult<Conv::s> FormatConvertImpl(const AbslCord& value,
                                          ConversionSpec conv,
diff --git a/absl/strings/internal/str_format/extension.h b/absl/strings/internal/str_format/extension.h
index eb81f8a17ca4..3f4788c9f502 100644
--- a/absl/strings/internal/str_format/extension.h
+++ b/absl/strings/internal/str_format/extension.h
@@ -25,10 +25,10 @@
 #include "absl/strings/internal/str_format/output.h"
 #include "absl/strings/string_view.h"
 
-class Cord;
-
 namespace absl {
 
+class Cord;
+
 namespace str_format_internal {
 
 class FormatRawSinkImpl {
diff --git a/absl/strings/internal/str_format/output.h b/absl/strings/internal/str_format/output.h
index 42da6417be07..6dc2f3f721f6 100644
--- a/absl/strings/internal/str_format/output.h
+++ b/absl/strings/internal/str_format/output.h
@@ -28,9 +28,10 @@
 #include "absl/base/port.h"
 #include "absl/strings/string_view.h"
 
+namespace absl {
+
 class Cord;
 
-namespace absl {
 namespace str_format_internal {
 
 // RawSink implementation that writes into a char* buffer.
@@ -76,7 +77,7 @@ inline void AbslFormatFlush(std::ostream* out, string_view s) {
 }
 
 template <class AbslCord, typename = typename std::enable_if<
-                              std::is_same<AbslCord, ::Cord>::value>::type>
+                              std::is_same<AbslCord, absl::Cord>::value>::type>
 inline void AbslFormatFlush(AbslCord* out, string_view s) {
   out->Append(s);
 }