ClickHouse/programs/library-bridge/SharedLibrary.h

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

42 lines
806 B
C++
Raw Normal View History

#pragma once
#include <dlfcn.h>
#include <memory>
#include <string>
#include <boost/noncopyable.hpp>
namespace DB
{
/** Allows you to open a dynamic library and get a pointer to a function from it.
*/
class SharedLibrary : private boost::noncopyable
{
public:
explicit SharedLibrary(std::string_view path, int flags = RTLD_LAZY);
~SharedLibrary();
template <typename Func>
Func get(std::string_view name)
{
return reinterpret_cast<Func>(getImpl(name));
}
template <typename Func>
Func tryGet(std::string_view name)
{
return reinterpret_cast<Func>(getImpl(name, true));
}
private:
void * getImpl(std::string_view name, bool no_throw = false);
void * handle = nullptr;
};
using SharedLibraryPtr = std::shared_ptr<SharedLibrary>;
}