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 // Copyright 2022 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.
 //
 // -----------------------------------------------------------------------------
 // File: log/internal/globals.h
 // -----------------------------------------------------------------------------
 //
 // This header file contains various global objects and static helper routines
 // use in logging implementation.
 
 #ifndef ABSL_LOG_INTERNAL_GLOBALS_H_
 #define ABSL_LOG_INTERNAL_GLOBALS_H_
 
 #include "absl/base/config.h"
 #include "absl/base/log_severity.h"
 #include "absl/strings/string_view.h"
 #include "absl/time/time.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace log_internal {
 
 // IsInitialized returns true if the logging library is initialized.
 // This function is async-signal-safe
 bool IsInitialized();
 
 // SetLoggingInitialized is called once after logging initialization is done.
 void SetInitialized();
 
 // Unconditionally write a `message` to stderr. If `severity` exceeds kInfo
 // we also flush the stderr stream.
 void WriteToStderr(absl::string_view message, absl::LogSeverity severity);
 
 // Set the TimeZone used for human-friendly times (for example, the log message
 // prefix) printed by the logging library. This may only be called once.
 void SetTimeZone(absl::TimeZone tz);
 
 // Returns the TimeZone used for human-friendly times (for example, the log
 // message prefix) printed by the logging library Returns nullptr prior to
 // initialization.
 const absl::TimeZone* TimeZone();
 
 // Returns true if stack traces emitted by the logging library should be
 // symbolized. This function is async-signal-safe.
 bool ShouldSymbolizeLogStackTrace();
 
 // Enables or disables symbolization of stack traces emitted by the
 // logging library. This function is async-signal-safe.
 void EnableSymbolizeLogStackTrace(bool on_off);
 
 // Returns the maximum number of frames that appear in stack traces
 // emitted by the logging library. This function is async-signal-safe.
 int MaxFramesInLogStackTrace();
 
 // Sets the maximum number of frames that appear in stack traces emitted by
 // the logging library. This function is async-signal-safe.
 void SetMaxFramesInLogStackTrace(int max_num_frames);
 
 // Determines whether we exit the program for a LOG(DFATAL) message in
 // debug mode.  It does this by skipping the call to Fail/FailQuietly.
 // This is intended for testing only.
 //
 // This can have some effects on LOG(FATAL) as well. Failure messages
 // are always allocated (rather than sharing a buffer), the crash
 // reason is not recorded, the "gwq" status message is not updated,
 // and the stack trace is not recorded.  The LOG(FATAL) *will* still
 // exit the program. Since this function is used only in testing,
 // these differences are acceptable.
 //
 // Additionally, LOG(LEVEL(FATAL)) is indistinguishable from LOG(DFATAL) and
 // will not terminate the program if SetExitOnDFatal(false) has been called.
 bool ExitOnDFatal();
 
 // SetExitOnDFatal() sets the ExitOnDFatal() status
 void SetExitOnDFatal(bool on_off);
 
 // Determines if the logging library should suppress logging of stacktraces in
 // the `SIGABRT` handler, typically because we just logged a stacktrace as part
 // of `LOG(FATAL)` and are about to send ourselves a `SIGABRT` to end the
 // program.
 bool SuppressSigabortTrace();
 
 // Sets the SuppressSigabortTrace() status and returns the previous state.
 bool SetSuppressSigabortTrace(bool on_off);
 
 }  // namespace log_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
 
 #endif  // ABSL_LOG_INTERNAL_GLOBALS_H_

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