lib/Support/PluginLoader.cpp

   1 //===-- PluginLoader.cpp - Implement -load command line option ------------===//
   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 implements the -load <plugin> command line option handler.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #define DONT_GET_PLUGIN_LOADER_OPTION
  15 #include "llvm/Support/PluginLoader.h"
  16 #include "llvm/System/DynamicLibrary.h"
  17 #include <iostream>
  18 #include <vector>
  19 using namespace llvm;
  20
  21 static std::vector<std::string> *Plugins;
  22
  23 void PluginLoader::operator=(const std::string &Filename) {
  24   if (!Plugins)
  25     Plugins = new std::vector<std::string>();
  26
  27   std::string Error;
  28   if (sys::DynamicLibrary::LoadLibraryPermanently(Filename.c_str(), &Error)) {
  29     std::cerr << "Error opening '" << Filename << "': " << Error
  30               << "\n  -load request ignored.\n";
  31   } else {
  32     Plugins->push_back(Filename);
  33   }
  34 }
  35
  36 unsigned PluginLoader::getNumPlugins() {
  37   return Plugins ? Plugins->size() : 0;
  38 }
  39
  40 std::string &PluginLoader::getPlugin(unsigned num) {
  41   assert(Plugins && num < Plugins->size() && "Asking for an out of bounds plugin");
  42   return (*Plugins)[num];
  43 }