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6b2a0c490c
Summary: This is a follow-up to D25416. It removes all usages of TimeValue from llvm/Support library (except for the actual TimeValue declaration), and replaces them with appropriate usages of std::chrono. To facilitate this, I have added small utility functions for converting time points and durations into appropriate OS-specific types (FILETIME, struct timespec, ...). Reviewers: zturner, mehdi_amini Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D25730 llvm-svn: 284966
107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
//===- llvm/Support/Unix/Unix.h - Common Unix Include File -------*- 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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//
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// This file defines things specific to Unix implementations.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_SUPPORT_UNIX_UNIX_H
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#define LLVM_LIB_SUPPORT_UNIX_UNIX_H
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic UNIX code that
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//=== is guaranteed to work on all UNIX variants.
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//===----------------------------------------------------------------------===//
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#include "llvm/Config/config.h" // Get autoconf configuration settings
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#include "llvm/Support/Chrono.h"
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#include "llvm/Support/Errno.h"
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#include <algorithm>
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#include <assert.h>
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#include <cerrno>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <string>
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#include <sys/types.h>
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#include <sys/wait.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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#endif
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#include <time.h>
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#ifdef HAVE_DLFCN_H
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# include <dlfcn.h>
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#endif
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#ifdef HAVE_FCNTL_H
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# include <fcntl.h>
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#endif
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/// This function builds an error message into \p ErrMsg using the \p prefix
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/// string and the Unix error number given by \p errnum. If errnum is -1, the
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/// default then the value of errno is used.
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/// @brief Make an error message
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///
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/// If the error number can be converted to a string, it will be
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/// separated from prefix by ": ".
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static inline bool MakeErrMsg(
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std::string* ErrMsg, const std::string& prefix, int errnum = -1) {
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if (!ErrMsg)
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return true;
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if (errnum == -1)
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errnum = errno;
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*ErrMsg = prefix + ": " + llvm::sys::StrError(errnum);
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return true;
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}
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namespace llvm {
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namespace sys {
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/// Convert a struct timeval to a duration. Note that timeval can be used both
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/// as a time point and a duration. Be sure to check what the input represents.
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inline std::chrono::microseconds toDuration(const struct timeval &TV) {
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return std::chrono::seconds(TV.tv_sec) +
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std::chrono::microseconds(TV.tv_usec);
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}
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/// Convert a time point to struct timespec.
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inline struct timespec toTimeSpec(TimePoint<> TP) {
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using namespace std::chrono;
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struct timespec RetVal;
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RetVal.tv_sec = toTimeT(TP);
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RetVal.tv_nsec = (TP.time_since_epoch() % seconds(1)).count();
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return RetVal;
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}
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/// Convert a time point to struct timeval.
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inline struct timeval toTimeVal(TimePoint<std::chrono::microseconds> TP) {
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using namespace std::chrono;
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struct timeval RetVal;
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RetVal.tv_sec = toTimeT(TP);
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RetVal.tv_usec = (TP.time_since_epoch() % seconds(1)).count();
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return RetVal;
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}
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} // namespace sys
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} // namespace llvm
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#endif
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