9c5f451d1c
## Purpose This patch is one in a series of code-mods that annotate LLVM’s public interface for export. This patch annotates the `llvm/Support` library. These annotations currently have no meaningful impact on the LLVM build; however, they are a prerequisite to support an LLVM Windows DLL (shared library) build. ## Background This effort is tracked in #109483. Additional context is provided in [this discourse](https://discourse.llvm.org/t/psa-annotating-llvm-public-interface/85307), and documentation for `LLVM_ABI` and related annotations is found in the LLVM repo [here](https://github.com/llvm/llvm-project/blob/main/llvm/docs/InterfaceExportAnnotations.rst). The bulk of these changes were generated automatically using the [Interface Definition Scanner (IDS)](https://github.com/compnerd/ids) tool, followed formatting with `git clang-format`. The following manual adjustments were also applied after running IDS on Linux: - Add `#include "llvm/Support/Compiler.h"` to files where it was not auto-added by IDS due to no pre-existing block of include statements. - Add `LLVM_ABI` to Windows-only code (auto generated with IDS on Windows) - Explicitly make classes non-copyable where needed to due IDS adding `LLVM_ABI` at the class level - Add `LLVM_TEMPLATE_ABI` and `LLVM_EXPORT_TEMPLATE` to exported instantiated templates - Add `LLVM_ABI_FRIEND` to a small number of `friend` function declarations - Add `LLVM_ABI` to a subset of private class methods and fields that require export - Add `LLVM_ABI` to a small number of symbols that require export but are not declared in headers - Add `LLVM_ABI` functions defined via X-macro ## Validation Local builds and tests to validate cross-platform compatibility. This included llvm, clang, and lldb on the following configurations: - Windows with MSVC - Windows with Clang - Linux with GCC - Linux with Clang - Darwin with Clang
130 lines
4.2 KiB
C++
130 lines
4.2 KiB
C++
//===- Support/Chrono.cpp - Utilities for Timing Manipulation ---*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Chrono.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/Support/Compiler.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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LLVM_ABI const char llvm::detail::unit<std::ratio<3600>>::value[] = "h";
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LLVM_ABI const char llvm::detail::unit<std::ratio<60>>::value[] = "m";
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LLVM_ABI const char llvm::detail::unit<std::ratio<1>>::value[] = "s";
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LLVM_ABI const char llvm::detail::unit<std::milli>::value[] = "ms";
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LLVM_ABI const char llvm::detail::unit<std::micro>::value[] = "us";
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LLVM_ABI const char llvm::detail::unit<std::nano>::value[] = "ns";
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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(_WIN32)
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int Error = ::localtime_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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static inline struct tm getStructTMUtc(UtcTime<> 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 = ::gmtime_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(_WIN32)
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int Error = ::gmtime_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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template <class T>
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static void format(const T &Fractional, struct tm <, raw_ostream &OS,
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StringRef Style) {
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using namespace std::chrono;
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// Handle extensions first. strftime mangles unknown %x on some platforms.
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if (Style.empty()) Style = "%Y-%m-%d %H:%M:%S.%N";
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std::string Format;
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raw_string_ostream FStream(Format);
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for (unsigned I = 0; I < Style.size(); ++I) {
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if (Style[I] == '%' && Style.size() > I + 1) switch (Style[I + 1]) {
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case 'L': // Milliseconds, from Ruby.
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FStream << llvm::format(
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"%.3lu", (long)duration_cast<milliseconds>(Fractional).count());
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++I;
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continue;
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case 'f': // Microseconds, from Python.
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FStream << llvm::format(
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"%.6lu", (long)duration_cast<microseconds>(Fractional).count());
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++I;
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continue;
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case 'N': // Nanoseconds, from date(1).
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FStream << llvm::format(
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"%.9lu", (long)duration_cast<nanoseconds>(Fractional).count());
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++I;
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continue;
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case '%': // Consume %%, so %%f parses as (%%)f not %(%f)
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FStream << "%%";
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++I;
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continue;
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}
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FStream << Style[I];
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}
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FStream.flush();
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char Buffer[256]; // Should be enough for anywhen.
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size_t Len = strftime(Buffer, sizeof(Buffer), Format.c_str(), <);
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OS << (Len ? Buffer : "BAD-DATE-FORMAT");
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}
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void format_provider<UtcTime<std::chrono::seconds>>::format(
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const UtcTime<std::chrono::seconds> &T, raw_ostream &OS, StringRef Style) {
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using namespace std::chrono;
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UtcTime<seconds> Truncated =
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UtcTime<seconds>(duration_cast<seconds>(T.time_since_epoch()));
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auto Fractional = T - Truncated;
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struct tm LT = getStructTMUtc(Truncated);
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llvm::format(Fractional, LT, OS, Style);
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}
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void format_provider<TimePoint<>>::format(const TimePoint<> &T, raw_ostream &OS,
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StringRef Style) {
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using namespace std::chrono;
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TimePoint<seconds> Truncated = time_point_cast<seconds>(T);
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auto Fractional = T - Truncated;
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struct tm LT = getStructTM(Truncated);
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llvm::format(Fractional, LT, OS, Style);
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}
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} // namespace llvm
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