llvm-6502/lib/Support/PluginLoader.cpp
Owen Anderson 61ffc0c7fd Guard the plugin loader.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73925 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-23 00:02:39 +00:00

49 lines
1.6 KiB
C++

//===-- PluginLoader.cpp - Implement -load command line option ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the -load <plugin> command line option handler.
//
//===----------------------------------------------------------------------===//
#define DONT_GET_PLUGIN_LOADER_OPTION
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PluginLoader.h"
#include "llvm/Support/Streams.h"
#include "llvm/System/DynamicLibrary.h"
#include "llvm/System/Mutex.h"
#include <ostream>
#include <vector>
using namespace llvm;
static ManagedStatic<std::vector<std::string> > Plugins;
static ManagedStatic<sys::SmartMutex<true> > PluginsLock;
void PluginLoader::operator=(const std::string &Filename) {
sys::SmartScopedLock<true> Lock(&*PluginsLock);
std::string Error;
if (sys::DynamicLibrary::LoadLibraryPermanently(Filename.c_str(), &Error)) {
cerr << "Error opening '" << Filename << "': " << Error
<< "\n -load request ignored.\n";
} else {
Plugins->push_back(Filename);
}
}
unsigned PluginLoader::getNumPlugins() {
sys::SmartScopedLock<true> Lock(&*PluginsLock);
return Plugins.isConstructed() ? Plugins->size() : 0;
}
std::string &PluginLoader::getPlugin(unsigned num) {
sys::SmartScopedLock<true> Lock(&*PluginsLock);
assert(Plugins.isConstructed() && num < Plugins->size() &&
"Asking for an out of bounds plugin");
return (*Plugins)[num];
}