mirror of
https://github.com/RPCSX/llvm.git
synced 2025-01-25 05:34:59 +00:00
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
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
//===-- TimeValue.cpp - Implement OS TimeValue Concept ----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the operating system TimeValue concept.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/TimeValue.h"
|
|
#include "llvm/Support/Chrono.h"
|
|
#include "llvm/Support/ScopedPrinter.h"
|
|
|
|
namespace llvm {
|
|
|
|
using namespace sys;
|
|
|
|
const TimeValue::SecondsType
|
|
TimeValue::PosixZeroTimeSeconds = -946684800;
|
|
const TimeValue::SecondsType
|
|
TimeValue::Win32ZeroTimeSeconds = -12591158400ULL;
|
|
|
|
void TimeValue::normalize() {
|
|
if ( nanos_ >= NANOSECONDS_PER_SECOND ) {
|
|
do {
|
|
seconds_++;
|
|
nanos_ -= NANOSECONDS_PER_SECOND;
|
|
} while ( nanos_ >= NANOSECONDS_PER_SECOND );
|
|
} else if (nanos_ <= -NANOSECONDS_PER_SECOND ) {
|
|
do {
|
|
seconds_--;
|
|
nanos_ += NANOSECONDS_PER_SECOND;
|
|
} while (nanos_ <= -NANOSECONDS_PER_SECOND);
|
|
}
|
|
|
|
if (seconds_ >= 1 && nanos_ < 0) {
|
|
seconds_--;
|
|
nanos_ += NANOSECONDS_PER_SECOND;
|
|
} else if (seconds_ < 0 && nanos_ > 0) {
|
|
seconds_++;
|
|
nanos_ -= NANOSECONDS_PER_SECOND;
|
|
}
|
|
}
|
|
|
|
std::string TimeValue::str() const { return to_string(TimePoint<>(*this)); }
|
|
|
|
TimeValue TimeValue::now() {
|
|
return TimePoint<>(std::chrono::system_clock::now());
|
|
}
|
|
|
|
} // namespace llvm
|