111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
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//===- 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"
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#include "llvm/Support/Chrono.h"
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#include "llvm/Support/Errno.h"
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#include "llvm/Support/ErrorHandling.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_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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// Include StrError(errnum) in a fatal error message.
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LLVM_ATTRIBUTE_NORETURN static inline void ReportErrnumFatal(const char *Msg,
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int errnum) {
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std::string ErrMsg;
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MakeErrMsg(&ErrMsg, Msg, errnum);
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llvm::report_fatal_error(ErrMsg);
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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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