lib/CompilerDriver/Plugin.cpp

   1 //===--- Plugin.cpp - The LLVM Compiler Driver ------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open
   6 // Source License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 //  Plugin support.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/CompilerDriver/Plugin.h"
  15
  16 #include <algorithm>
  17 #include <vector>
  18
  19 namespace {
  20
  21   // Registry::Add<> does not do lifetime management (probably issues
  22   // with static constructor/destructor ordering), so we have to
  23   // implement it here.
  24   //
  25   // All this static registration/life-before-main model seems
  26   // unnecessary convoluted to me.
  27
  28   static bool pluginListInitialized = false;
  29   typedef std::vector<const llvmc::BasePlugin*> PluginList;
  30   static PluginList Plugins;
  31
  32   struct ByPriority {
  33     bool operator()(const llvmc::BasePlugin* lhs,
  34                     const llvmc::BasePlugin* rhs) {
  35       return lhs->Priority() < rhs->Priority();
  36     }
  37   };
  38 }
  39
  40 namespace llvmc {
  41
  42   PluginLoader::PluginLoader() {
  43     if (!pluginListInitialized) {
  44       for (PluginRegistry::iterator B = PluginRegistry::begin(),
  45              E = PluginRegistry::end(); B != E; ++B)
  46         Plugins.push_back(B->instantiate());
  47       std::sort(Plugins.begin(), Plugins.end(), ByPriority());
  48     }
  49     pluginListInitialized = true;
  50   }
  51
  52   PluginLoader::~PluginLoader() {
  53     if (pluginListInitialized) {
  54       for (PluginList::iterator B = Plugins.begin(), E = Plugins.end();
  55            B != E; ++B)
  56         delete (*B);
  57     }
  58     pluginListInitialized = false;
  59   }
  60
  61   void PluginLoader::PopulateLanguageMap(LanguageMap& langMap) {
  62     for (PluginList::iterator B = Plugins.begin(), E = Plugins.end();
  63          B != E; ++B)
  64       (*B)->PopulateLanguageMap(langMap);
  65   }
  66
  67   void PluginLoader::PopulateCompilationGraph(CompilationGraph& graph) {
  68     for (PluginList::iterator B = Plugins.begin(), E = Plugins.end();
  69          B != E; ++B)
  70       (*B)->PopulateCompilationGraph(graph);
  71   }
  72
  73 }