lib/Support/Program.cpp

   1 //===-- Program.cpp - Implement OS Program Concept --------------*- 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 header file implements the operating system Program concept.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Support/Program.h"
  15 #include "llvm/Config/config.h"
  16 #include <system_error>
  17 using namespace llvm;
  18 using namespace sys;
  19
  20 //===----------------------------------------------------------------------===//
  21 //=== WARNING: Implementation here must contain only TRULY operating system
  22 //===          independent code.
  23 //===----------------------------------------------------------------------===//
  24
  25 static bool Execute(ProcessInfo &PI, StringRef Program, const char **args,
  26                     const char **env, const StringRef **Redirects,
  27                     unsigned memoryLimit, std::string *ErrMsg);
  28
  29 int sys::ExecuteAndWait(StringRef Program, const char **args, const char **envp,
  30                         const StringRef **redirects, unsigned secondsToWait,
  31                         unsigned memoryLimit, std::string *ErrMsg,
  32                         bool *ExecutionFailed) {
  33   ProcessInfo PI;
  34   if (Execute(PI, Program, args, envp, redirects, memoryLimit, ErrMsg)) {
  35     if (ExecutionFailed)
  36       *ExecutionFailed = false;
  37     ProcessInfo Result = Wait(
  38         PI, secondsToWait, /*WaitUntilTerminates=*/secondsToWait == 0, ErrMsg);
  39     return Result.ReturnCode;
  40   }
  41
  42   if (ExecutionFailed)
  43     *ExecutionFailed = true;
  44
  45   return -1;
  46 }
  47
  48 ProcessInfo sys::ExecuteNoWait(StringRef Program, const char **args,
  49                                const char **envp, const StringRef **redirects,
  50                                unsigned memoryLimit, std::string *ErrMsg,
  51                                bool *ExecutionFailed) {
  52   ProcessInfo PI;
  53   if (ExecutionFailed)
  54     *ExecutionFailed = false;
  55   if (!Execute(PI, Program, args, envp, redirects, memoryLimit, ErrMsg))
  56     if (ExecutionFailed)
  57       *ExecutionFailed = true;
  58
  59   return PI;
  60 }
  61
  62 // Include the platform-specific parts of this class.
  63 #ifdef LLVM_ON_UNIX
  64 #include "Unix/Program.inc"
  65 #endif
  66 #ifdef LLVM_ON_WIN32
  67 #include "Windows/Program.inc"
  68 #endif