lib/Support/PluginLoader.cpp

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