Export of internal Abseil changes

--
b548087c24ae7c2c709e8040a118b5e312d18e2e by Derek Mauro <dmauro@google.com>:

Remove the static initialization of global variables used by absl::Mutex
as requested by Chromium

PiperOrigin-RevId: 317676541

--
f198f5da1e966772efa978ba019bd23576899794 by Greg Miller <jgm@google.com>:

fix: work around gcc-4.8 bug in disjunction

See https://godbolt.org/z/i7-AmM for a repro of the bug.

I realize that Abseil no longer supports gcc 4.8 officially
(https://abseil.io/docs/cpp/platforms/platforms), but Cloud C++ still supports
gcc 4.8 officially, and so it would be nice to get this simple fix in.

fixes https://github.com/abseil/abseil-cpp/issues/718

PiperOrigin-RevId: 317484459

--
ed233f646530c6c0948213b643cc6919db1bee90 by Chris Kennelly <ckennelly@google.com>:

Avoid determining the size of the duration unit at runtime.

PiperOrigin-RevId: 317376300

--
73d4011c17fcf747a990176924a7adc69d443533 by Greg Falcon <gfalcon@google.com>:

Change spelling of internal detail from `Invoke`/`InvokeT` to `invoke`/`invoke_result_t`.

This matches the spelling of the C++17 standard library names that perform the same operations.

PiperOrigin-RevId: 317311527
GitOrigin-RevId: b548087c24ae7c2c709e8040a118b5e312d18e2e
Change-Id: I131809ff0b92cfdb0d96dc94e94d9c6f751cb0ac

1 files changed, 11 insertions, 9 deletions

diff --git a/absl/time/duration.cc b/absl/time/duration.cc
index d0f1aadb..952cc093 100644
--- a/absl/time/duration.cc
+++ b/absl/time/duration.cc
@@ -69,6 +69,7 @@
 #include "absl/base/casts.h"
 #include "absl/base/macros.h"
 #include "absl/numeric/int128.h"
+#include "absl/strings/string_view.h"
 #include "absl/strings/strip.h"
 #include "absl/time/time.h"
 
@@ -710,16 +711,17 @@ char* Format64(char* ep, int width, int64_t v) {
 // fractional digits, because it is in the noise of what a Duration can
 // represent.
 struct DisplayUnit {
-  const char* abbr;
+  absl::string_view abbr;
   int prec;
   double pow10;
 };
-const DisplayUnit kDisplayNano = {"ns", 2, 1e2};
-const DisplayUnit kDisplayMicro = {"us", 5, 1e5};
-const DisplayUnit kDisplayMilli = {"ms", 8, 1e8};
-const DisplayUnit kDisplaySec = {"s", 11, 1e11};
-const DisplayUnit kDisplayMin = {"m", -1, 0.0};   // prec ignored
-const DisplayUnit kDisplayHour = {"h", -1, 0.0};  // prec ignored
+ABSL_CONST_INIT const DisplayUnit kDisplayNano = {"ns", 2, 1e2};
+ABSL_CONST_INIT const DisplayUnit kDisplayMicro = {"us", 5, 1e5};
+ABSL_CONST_INIT const DisplayUnit kDisplayMilli = {"ms", 8, 1e8};
+ABSL_CONST_INIT const DisplayUnit kDisplaySec = {"s", 11, 1e11};
+ABSL_CONST_INIT const DisplayUnit kDisplayMin = {"m", -1, 0.0};  // prec ignored
+ABSL_CONST_INIT const DisplayUnit kDisplayHour = {"h", -1,
+                                                  0.0};  // prec ignored
 
 void AppendNumberUnit(std::string* out, int64_t n, DisplayUnit unit) {
   char buf[sizeof("2562047788015216")];  // hours in max duration
@@ -727,7 +729,7 @@ void AppendNumberUnit(std::string* out, int64_t n, DisplayUnit unit) {
   char* bp = Format64(ep, 0, n);
   if (*bp != '0' || bp + 1 != ep) {
     out->append(bp, ep - bp);
-    out->append(unit.abbr);
+    out->append(unit.abbr.data(), unit.abbr.size());
   }
 }
 
@@ -750,7 +752,7 @@ void AppendNumberUnit(std::string* out, double n, DisplayUnit unit) {
       while (ep[-1] == '0') --ep;
       out->append(bp, ep - bp);
     }
-    out->append(unit.abbr);
+    out->append(unit.abbr.data(), unit.abbr.size());
   }
 }