SystemUtils.h revision 436f23ebf58418611f798faf7e00de05c7a42e21 
1//===- SystemUtils.h - Utilities to do low-level system stuff ---*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains functions used to do a variety of low-level, often
11// system-specific, tasks.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_SUPPORT_SYSTEMUTILS_H
16#define LLVM_SUPPORT_SYSTEMUTILS_H
17
18#include "llvm/System/Program.h"
19
20namespace llvm {
21
22/// Determine if the ostream provided is connected to the std::cout and
23/// displayed or not (to a console window). If so, generate a warning message
24/// advising against display of bytecode and return true. Otherwise just return
25/// false
26/// @brief Check for output written to a console
27bool CheckBytecodeOutputToConsole(std::ostream* stream_to_check);
28
29/// FindExecutable - Find a named executable, giving the argv[0] of program
30/// being executed. This allows us to find another LLVM tool if it is built into
31/// the same directory, but that directory is neither the current directory, nor
32/// in the PATH.  If the executable cannot be found, return an empty string.
33/// @brief Find a named executable.
34sys::Path FindExecutable(const std::string &ExeName,
35                         const std::string &ProgramPath);
36
37/// RunProgramWithTimeout - This function provides an alternate interface to the
38/// sys::Program::ExecuteAndWait interface.
39/// @see sys:Program::ExecuteAndWait
40inline int RunProgramWithTimeout(const sys::Path &ProgramPath,
41                                const char **Args,
42                                const sys::Path &StdInFile,
43                                const sys::Path &StdOutFile,
44                                const sys::Path &StdErrFile,
45                                unsigned NumSeconds = 0) {
46  const sys::Path* redirects[3];
47  redirects[0] = &StdInFile;
48  redirects[1] = &StdOutFile;
49  redirects[2] = &StdErrFile;
50
51  return
52    sys::Program::ExecuteAndWait(ProgramPath, Args, 0, redirects, NumSeconds);
53}
54
55} // End llvm namespace
56
57#endif
58