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844731a7f1
several things that were neither in an anonymous namespace nor static but not intended to be global. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51017 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
//===- llvm/System/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_SYSTEM_UNIX_UNIX_H
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#define LLVM_SYSTEM_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 <cstdlib>
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#include <cstdio>
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#include <cstring>
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#include <cerrno>
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#include <string>
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#include <algorithm>
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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_TYPES_H
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#include <sys/types.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_ASSERT_H
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#include <assert.h>
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#endif
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#ifdef TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#ifdef HAVE_SYS_WAIT_H
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# include <sys/wait.h>
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#endif
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#ifndef WEXITSTATUS
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# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
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#endif
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#ifndef WIFEXITED
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# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
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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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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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char buffer[MAXPATHLEN];
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buffer[0] = 0;
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if (errnum == -1)
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errnum = errno;
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#ifdef HAVE_STRERROR_R
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// strerror_r is thread-safe.
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if (errnum)
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strerror_r(errnum,buffer,MAXPATHLEN-1);
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#elif HAVE_STRERROR
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// Copy the thread un-safe result of strerror into
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// the buffer as fast as possible to minimize impact
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// of collision of strerror in multiple threads.
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if (errnum)
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strncpy(buffer,strerror(errnum),MAXPATHLEN-1);
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buffer[MAXPATHLEN-1] = 0;
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#else
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// Strange that this system doesn't even have strerror
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// but, oh well, just use a generic message
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sprintf(buffer, "Error #%d", errnum);
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#endif
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*ErrMsg = prefix + buffer;
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return true;
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}
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#endif
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