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bca3cda284
Summary: std::chrono mostly covers the functionality of llvm::sys::TimeValue and lldb_private::TimeValue. This header adds a bit of utility functions and typedefs, which make the usage of the library and porting code from TimeValues easier. Rationale: - TimePoint typedef - precision of system_clock is implementation defined - using a well-defined precision helps maintain consistency between platforms, makes it interact better with existing TimeValue classes, and avoids cases there a time point is implicitly convertible to a specific precision on some platforms but not on others. - system_clock::to_time_t only accepts time_points with the default system precision (even though time_t has only second precision on all platforms we support). To avoid the need for explicit casts, I have added a toTimeT() wrapper function. toTimePoint(time_t) was not strictly necessary, but I have added it for symmetry. Reviewers: zturner, mehdi_amini Subscribers: beanz, mgorny, llvm-commits, modocache Differential Revision: https://reviews.llvm.org/D25416 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284590 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
//===- Support/Chrono.cpp - Utilities for Timing Manipulation ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Chrono.h"
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#include "llvm/Config/config.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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using namespace sys;
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static inline struct tm getStructTM(TimePoint<> TP) {
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struct tm Storage;
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std::time_t OurTime = toTimeT(TP);
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#if defined(LLVM_ON_UNIX)
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struct tm *LT = ::localtime_r(&OurTime, &Storage);
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assert(LT);
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(void)LT;
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#endif
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#if defined(LLVM_ON_WIN32)
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int Error = ::_localtime64_s(&Storage, &OurTime);
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assert(!Error);
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(void)Error;
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#endif
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return Storage;
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}
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raw_ostream &operator<<(raw_ostream &OS, TimePoint<> TP) {
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struct tm LT = getStructTM(TP);
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char Buffer[sizeof("YYYY-MM-DD HH:MM:SS")];
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strftime(Buffer, sizeof(Buffer), "%Y-%m-%d %H:%M:%S", <);
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return OS << Buffer << '.'
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<< format("%.9lu",
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long((TP.time_since_epoch() % std::chrono::seconds(1))
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.count()));
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}
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} // namespace llvm
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