Export of internal Abseil changes

--
873b52b0a691e759413c5db27dafc541a5da5263 by Andy Getzendanner <durandal@google.com>:

Introduce an internal-only thread-local caching wrapper around GetTID.

PiperOrigin-RevId: 323055682

--
091a4537f1ef6e158acbf4261cfae1af7a3bdb7f by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 322864497

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c80ccfff2a825819f31826a30f48cca3297699f8 by Evan Brown <ezb@google.com>:

Roll forward b-tree changes simplifying deletion and getting rid of recursion in clear_and_delete().

We also change clear_and_delete() to avoid some unnecessary comparisons by restructuring the loops.

PiperOrigin-RevId: 322658938

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81464c0fb9c8c6268dca2e530aba99e75e1e59ae by Gennadiy Rozental <rogeeff@google.com>:

Eliminate definition of RunningOnValgrind inside the library.

Fixes #674
Fixes #657

PiperOrigin-RevId: 322508440
GitOrigin-RevId: 873b52b0a691e759413c5db27dafc541a5da5263
Change-Id: I20b40c9e8fc62edcf981caab467cca33cf6fd2ba

1 files changed, 29 insertions, 35 deletions

diff --git a/absl/base/dynamic_annotations.h b/absl/base/dynamic_annotations.h
index 5ea697b7..c470c747 100644
--- a/absl/base/dynamic_annotations.h
+++ b/absl/base/dynamic_annotations.h
@@ -47,7 +47,11 @@
 
 #include <stddef.h>
 
+#include "absl/base/attributes.h"
 #include "absl/base/config.h"
+#ifdef __cplusplus
+#include "absl/base/macros.h"
+#endif
 
 // TODO(rogeeff): Remove after the backward compatibility period.
 #include "absl/base/internal/dynamic_annotations.h"  // IWYU pragma: export
@@ -90,7 +94,8 @@
 // Read/write annotations are enabled in Annotalysis mode; disabled otherwise.
 #define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED \
   ABSL_INTERNAL_ANNOTALYSIS_ENABLED
-#endif
+
+#endif  // ABSL_HAVE_THREAD_SANITIZER
 
 #ifdef __cplusplus
 #define ABSL_INTERNAL_BEGIN_EXTERN_C extern "C" {
@@ -152,7 +157,7 @@
   ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreate)(__FILE__, __LINE__, lock)
 
 // Report that a linker initialized lock has been created at address `lock`.
-#ifdef THREAD_SANITIZER
+#ifdef ABSL_HAVE_THREAD_SANITIZER
 #define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock)          \
   ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreateStatic) \
   (__FILE__, __LINE__, lock)
@@ -417,41 +422,30 @@ ABSL_NAMESPACE_END
 
 #endif
 
+#ifdef __cplusplus
+#ifdef ABSL_HAVE_THREAD_SANITIZER
 ABSL_INTERNAL_BEGIN_EXTERN_C
-
-// -------------------------------------------------------------------------
-// Return non-zero value if running under valgrind.
-//
-//  If "valgrind.h" is included into dynamic_annotations.cc,
-//  the regular valgrind mechanism will be used.
-//  See http://valgrind.org/docs/manual/manual-core-adv.html about
-//  RUNNING_ON_VALGRIND and other valgrind "client requests".
-//  The file "valgrind.h" may be obtained by doing
-//     svn co svn://svn.valgrind.org/valgrind/trunk/include
-//
-//  If for some reason you can't use "valgrind.h" or want to fake valgrind,
-//  there are two ways to make this function return non-zero:
-//    - Use environment variable: export RUNNING_ON_VALGRIND=1
-//    - Make your tool intercept the function RunningOnValgrind() and
-//      change its return value.
-//
-int RunningOnValgrind(void);
-
-// ValgrindSlowdown returns:
-//    * 1.0, if (RunningOnValgrind() == 0)
-//    * 50.0, if (RunningOnValgrind() != 0 && getenv("VALGRIND_SLOWDOWN") ==
-//    NULL)
-//    * atof(getenv("VALGRIND_SLOWDOWN")) otherwise
-//   This function can be used to scale timeout values:
-//   EXAMPLE:
-//   for (;;) {
-//     DoExpensiveBackgroundTask();
-//     SleepForSeconds(5 * ValgrindSlowdown());
-//   }
-//
-double ValgrindSlowdown(void);
-
+int RunningOnValgrind();
+double ValgrindSlowdown();
 ABSL_INTERNAL_END_EXTERN_C
+#else
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace base_internal {
+ABSL_DEPRECATED(
+    "Don't use this interface. It is misleading and is being deleted.")
+ABSL_ATTRIBUTE_ALWAYS_INLINE inline int RunningOnValgrind() { return 0; }
+ABSL_DEPRECATED(
+    "Don't use this interface. It is misleading and is being deleted.")
+ABSL_ATTRIBUTE_ALWAYS_INLINE inline double ValgrindSlowdown() { return 1.0; }
+}  // namespace base_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+using absl::base_internal::RunningOnValgrind;
+using absl::base_internal::ValgrindSlowdown;
+#endif
+#endif
 
 // -------------------------------------------------------------------------
 // Address sanitizer annotations