Snap for 8451755 from 7563023510bf04108a954596ea9393a4c11ac279 to tm-releaseandroid-vts-13.0_r8android-vts-13.0_r7android-vts-13.0_r6android-vts-13.0_r5android-vts-13.0_r4android-vts-13.0_r3android-vts-13.0_r2android-vts-13.0_r1android-security-13.0.0_r9android-security-13.0.0_r8android-security-13.0.0_r7android-security-13.0.0_r6android-security-13.0.0_r5android-security-13.0.0_r4android-security-13.0.0_r3android-security-13.0.0_r2android-security-13.0.0_r17android-security-13.0.0_r16android-security-13.0.0_r15android-security-13.0.0_r14android-security-13.0.0_r13android-security-13.0.0_r12android-security-13.0.0_r11android-security-13.0.0_r10android-security-13.0.0_r1android-platform-13.0.0_r2android-platform-13.0.0_r1android-cts-13.0_r8android-cts-13.0_r7android-cts-13.0_r6android-cts-13.0_r5android-cts-13.0_r4android-cts-13.0_r3android-cts-13.0_r2android-cts-13.0_r1android-13.0.0_r8android-13.0.0_r7android-13.0.0_r6android-13.0.0_r5android-13.0.0_r4android-13.0.0_r31android-13.0.0_r3android-13.0.0_r2android-13.0.0_r12android-13.0.0_r1android13-tests-releaseandroid13-security-releaseandroid13-s3-releaseandroid13-s2-releaseandroid13-s1-releaseandroid13-release

Change-Id: Ie91f8b8b9ff715203282c2c4b2072b0f702d0631

1 files changed, 71 insertions, 0 deletions

diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_update_scope.h b/third_party/abseil-cpp/absl/strings/internal/cordz_update_scope.h
new file mode 100644
index 0000000000..57ba75de93
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_update_scope.h
@@ -0,0 +1,71 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_STRINGS_INTERNAL_CORDZ_UPDATE_SCOPE_H_
+#define ABSL_STRINGS_INTERNAL_CORDZ_UPDATE_SCOPE_H_
+
+#include "absl/base/config.h"
+#include "absl/base/optimization.h"
+#include "absl/base/thread_annotations.h"
+#include "absl/strings/internal/cord_internal.h"
+#include "absl/strings/internal/cordz_info.h"
+#include "absl/strings/internal/cordz_update_tracker.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+
+// CordzUpdateScope scopes an update to the provided CordzInfo.
+// The class invokes `info->Lock(method)` and `info->Unlock()` to guard
+// cordrep updates. This class does nothing if `info` is null.
+// See also the 'Lock`, `Unlock` and `SetCordRep` methods in `CordzInfo`.
+class ABSL_SCOPED_LOCKABLE CordzUpdateScope {
+ public:
+  CordzUpdateScope(CordzInfo* info, CordzUpdateTracker::MethodIdentifier method)
+      ABSL_EXCLUSIVE_LOCK_FUNCTION(info)
+      : info_(info) {
+    if (ABSL_PREDICT_FALSE(info_)) {
+      info->Lock(method);
+    }
+  }
+
+  // CordzUpdateScope can not be copied or assigned to.
+  CordzUpdateScope(CordzUpdateScope&& rhs) = delete;
+  CordzUpdateScope(const CordzUpdateScope&) = delete;
+  CordzUpdateScope& operator=(CordzUpdateScope&& rhs) = delete;
+  CordzUpdateScope& operator=(const CordzUpdateScope&) = delete;
+
+  ~CordzUpdateScope() ABSL_UNLOCK_FUNCTION() {
+    if (ABSL_PREDICT_FALSE(info_)) {
+      info_->Unlock();
+    }
+  }
+
+  void SetCordRep(CordRep* rep) const {
+    if (ABSL_PREDICT_FALSE(info_)) {
+      info_->SetCordRep(rep);
+    }
+  }
+
+  CordzInfo* info() const { return info_; }
+
+ private:
+  CordzInfo* info_;
+};
+
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_STRINGS_INTERNAL_CORDZ_UPDATE_SCOPE_H_