12bc53e031
-- c99f979ad34f155fbeeea69b88bdc7458d89a21c by Derek Mauro <dmauro@google.com>: Remove a floating point division by zero test. This isn't testing behavior related to the library, and MSVC warns about it in opt mode. PiperOrigin-RevId: 285220804 -- 68b015491f0dbf1ab547994673281abd1f34cd4b by Gennadiy Rozental <rogeeff@google.com>: This CL introduces following changes to the class FlagImpl: * We eliminate the CommandLineFlagLocks struct. Instead callback guard and callback function are combined into a single CallbackData struct, while primary data lock is stored separately. * CallbackData member of class FlagImpl is initially set to be nullptr and is only allocated and initialized when a flag's callback is being set. For most flags we do not pay for the extra space and extra absl::Mutex now. * Primary data guard is stored in data_guard_ data member. This is a properly aligned character buffer of necessary size. During initialization of the flag we construct absl::Mutex in this space using placement new call. * We now avoid extra value copy after successful attempt to parse value out of string. Instead we swap flag's current value with tentative value we just produced. PiperOrigin-RevId: 285132636 -- ed45d118fb818969eb13094cf7827c885dfc562c by Tom Manshreck <shreck@google.com>: Change null-term* (and nul-term*) to NUL-term* in comments PiperOrigin-RevId: 285036610 -- 729619017944db895ce8d6d29c1995aa2e5628a5 by Derek Mauro <dmauro@google.com>: Use the Posix implementation of thread identity on MinGW. Some versions of MinGW suffer from thread_local bugs. PiperOrigin-RevId: 285022920 -- 39a25493503c76885bc3254c28f66a251c5b5bb0 by Greg Falcon <gfalcon@google.com>: Implementation detail change. Add further ABSL_NAMESPACE_BEGIN and _END annotation macros to files in Abseil. PiperOrigin-RevId: 285012012 GitOrigin-RevId: c99f979ad34f155fbeeea69b88bdc7458d89a21c Change-Id: I4c85d3704e45d11a9ac50d562f39640a6adbedc1
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// -----------------------------------------------------------------------------
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// File: clock.h
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// -----------------------------------------------------------------------------
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//
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// This header file contains utility functions for working with the system-wide
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// realtime clock. For descriptions of the main time abstractions used within
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// this header file, consult the time.h header file.
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#ifndef ABSL_TIME_CLOCK_H_
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#define ABSL_TIME_CLOCK_H_
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#include "absl/base/macros.h"
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#include "absl/time/time.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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// Now()
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//
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// Returns the current time, expressed as an `absl::Time` absolute time value.
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absl::Time Now();
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// GetCurrentTimeNanos()
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//
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// Returns the current time, expressed as a count of nanoseconds since the Unix
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// Epoch (https://en.wikipedia.org/wiki/Unix_time). Prefer `absl::Now()` instead
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// for all but the most performance-sensitive cases (i.e. when you are calling
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// this function hundreds of thousands of times per second).
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int64_t GetCurrentTimeNanos();
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// SleepFor()
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//
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// Sleeps for the specified duration, expressed as an `absl::Duration`.
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//
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// Notes:
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// * Signal interruptions will not reduce the sleep duration.
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// * Returns immediately when passed a nonpositive duration.
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void SleepFor(absl::Duration duration);
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ABSL_NAMESPACE_END
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} // namespace absl
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// -----------------------------------------------------------------------------
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// Implementation Details
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// -----------------------------------------------------------------------------
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// In some build configurations we pass --detect-odr-violations to the
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// gold linker. This causes it to flag weak symbol overrides as ODR
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// violations. Because ODR only applies to C++ and not C,
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// --detect-odr-violations ignores symbols not mangled with C++ names.
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// By changing our extension points to be extern "C", we dodge this
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// check.
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extern "C" {
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void AbslInternalSleepFor(absl::Duration duration);
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} // extern "C"
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inline void absl::SleepFor(absl::Duration duration) {
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AbslInternalSleepFor(duration);
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}
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#endif // ABSL_TIME_CLOCK_H_
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