1//===- llvm/Support/Unix/Unix.h - Common Unix Include File -------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines things specific to Unix implementations.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_LIB_SUPPORT_UNIX_UNIX_H
15#define LLVM_LIB_SUPPORT_UNIX_UNIX_H
16
17//===----------------------------------------------------------------------===//
18//=== WARNING: Implementation here must contain only generic UNIX code that
19//===          is guaranteed to work on all UNIX variants.
20//===----------------------------------------------------------------------===//
21
22#include "llvm/Config/config.h"     // Get autoconf configuration settings
23#include "llvm/Support/Errno.h"
24#include <algorithm>
25#include <assert.h>
26#include <cerrno>
27#include <cstdio>
28#include <cstdlib>
29#include <cstring>
30#include <string>
31#include <sys/types.h>
32#include <sys/wait.h>
33
34#ifdef HAVE_UNISTD_H
35#include <unistd.h>
36#endif
37
38#ifdef HAVE_SYS_PARAM_H
39#include <sys/param.h>
40#endif
41
42#ifdef HAVE_SYS_TIME_H
43# include <sys/time.h>
44#endif
45#include <time.h>
46
47#ifdef HAVE_DLFCN_H
48# include <dlfcn.h>
49#endif
50
51/// This function builds an error message into \p ErrMsg using the \p prefix
52/// string and the Unix error number given by \p errnum. If errnum is -1, the
53/// default then the value of errno is used.
54/// @brief Make an error message
55///
56/// If the error number can be converted to a string, it will be
57/// separated from prefix by ": ".
58static inline bool MakeErrMsg(
59  std::string* ErrMsg, const std::string& prefix, int errnum = -1) {
60  if (!ErrMsg)
61    return true;
62  if (errnum == -1)
63    errnum = errno;
64  *ErrMsg = prefix + ": " + llvm::sys::StrError(errnum);
65  return true;
66}
67
68#endif
69