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2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
//===- llvm/Support/Unix/Unix.h - Common Unix Include File -------*- 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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//
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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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/// 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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