Unix.h revision 296373
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_SYSTEM_UNIX_UNIX_H 15#define LLVM_SYSTEM_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 33#ifdef HAVE_UNISTD_H 34#include <unistd.h> 35#endif 36 37#ifdef HAVE_SYS_PARAM_H 38#include <sys/param.h> 39#endif 40 41#ifdef HAVE_SYS_TIME_H 42# include <sys/time.h> 43#endif 44#include <time.h> 45 46#ifdef HAVE_SYS_WAIT_H 47# include <sys/wait.h> 48#endif 49 50#ifdef HAVE_DLFCN_H 51# include <dlfcn.h> 52#endif 53 54#ifndef WEXITSTATUS 55# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8) 56#endif 57 58#ifndef WIFEXITED 59# define WIFEXITED(stat_val) (((stat_val) & 255) == 0) 60#endif 61 62/// This function builds an error message into \p ErrMsg using the \p prefix 63/// string and the Unix error number given by \p errnum. If errnum is -1, the 64/// default then the value of errno is used. 65/// @brief Make an error message 66/// 67/// If the error number can be converted to a string, it will be 68/// separated from prefix by ": ". 69static inline bool MakeErrMsg( 70 std::string* ErrMsg, const std::string& prefix, int errnum = -1) { 71 if (!ErrMsg) 72 return true; 73 if (errnum == -1) 74 errnum = errno; 75 *ErrMsg = prefix + ": " + llvm::sys::StrError(errnum); 76 return true; 77} 78 79#endif 80