我有一些代码来使用模板静态类处理资源（图像、字体、网格数据等）管理，允许客户端代码执行以下操作：
ResourceManager<Texture>::init("data/textures");
ResourceManager<Font>::init("data/fonts");
// later ...
boost::shared_ptr<const Texture> tex = ResourceManager<Texture>::getResource("wall.png");
boost::shared_ptr<const Font> font = ResourceManager<Font>::getResource("Arial.ttf");
// later ...
ResourceManager<Texture>::release();
“资源类型”必须有一个构造函数采用const std::string&.
getResource实现如下：
static boost::shared_ptr<const ResourceType> getResource(const std::string& fileName)
{
boost::shared_ptr<ResourceType> resource;
typename table_t::const_iterator itr = _resources.find(fileName);
if (itr == _resources.end()) {
resource.reset(new ResourceType(_dataDirectory + fileName));
_resources[fileName] = resource;
} else {
resource = itr->second;
}
return resource;
}
table_t定义为typedef typename boost::unordered_map< std::string, boost::shared_ptr<ResourceType> > table_t;
_resources是类型table_t。
问题是boost::unordered_map我在调用find（源自find_iterator）时遇到了段错误。但是，std::map相反，我在插入操作（源自_Rb_tree_decrement）或调用find（源自string::compare）时遇到段错误。
该问题仅在第二次请求资源时发生（发生故障时文件名有效）。
由于两者都发生了这种情况，map我unordered_map假设我必须在某个地方做一些奇怪的事情来导致这种情况，有什么想法吗？
谢谢。
编辑：仍然有问题，我错了，它只发生在第二次请求资源时。但是，获取资源的前 2 次调用是成功的，这是导致段错误的第 3 次调用（每次调用都针对不同的资源）。
这是一个堆栈跟踪：
Program received signal SIGSEGV, Segmentation fault.
0x00000000004b4978 in boost::unordered_detail::hash_table<boost::unordered_detail::map<std::string, boost::hash<std::string>, std::equal_to<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<Texture> > > > >::find_iterator (this=0x7aed80, bucket=0x38, k=...)
at /usr/local/include/boost/unordered/detail/table.hpp:55
55 node_ptr it = bucket->next_;
(gdb) bt
#0 0x00000000004b4978 in boost::unordered_detail::hash_table<boost::unordered_detail::map<std::string, boost::hash<std::string>, std::equal_to<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<Texture> > > > >::find_iterator (this=0x7aed80, bucket=0x38, k=...)
at /usr/local/include/boost/unordered/detail/table.hpp:55
#1 0x00000000004b294c in boost::unordered_detail::hash_table<boost::unordered_detail::map<std::string, boost::hash<std::string>, std::equal_to<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<Texture> > > > >::find (this=0x7aed80, k=...)
at /usr/local/include/boost/unordered/detail/table.hpp:583
#2 0x00000000004b07c1 in boost::unordered_map<std::string, boost::shared_ptr<Texture>, boost::hash<std::string>, std::equal_to<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<Texture> > > >::find (this=0x7aed80, k=...)
at /usr/local/include/boost/unordered/unordered_map.hpp:423
#3 0x00000000004ae7c6 in ResourceManager<Texture>::getResource (fileName=...) at /home/tim/Projects/gameproj/app/ResourceManager.hpp:52
#4 0x00000000004ce7fc in Map::loadCellTextures (this=0x7fffffffdfc0, in=...) at /home/tim/Projects/gameproj/app/Map.cpp:57
#5 0x00000000004ce632 in Map (this=0x7fffffffdfc0, fileName=...) at /home/tim/Projects/gameproj/app/Map.cpp:30
#6 0x0000000000495702 in Game::init (xResolution=1024, yResolution=768) at /home/tim/Projects/gameproj/app/Game.cpp:116
#7 0x0000000000494fa0 in Game::run (xResolution=1024, yResolution=768) at /home/tim/Projects/gameproj/app/Game.cpp:38
#8 0x0000000000487f1d in Main::run (xResolution=1024, yResolution=768) at /home/tim/Projects/gameproj/app/Main.cpp:28
#9 0x0000000000487db5 in main (argc=1, argv=0x7fffffffe398) at /home/tim/Projects/gameproj/app/main.cpp:10