-#include "hwacha.h"
+#include "extension.h"
+#include <string>
+#include <map>
+#include <dlfcn.h>
+
+static std::map<std::string, std::function<extension_t*()>>& extensions()
+{
+ static std::map<std::string, std::function<extension_t*()>> v;
+ return v;
+}
+
+void register_extension(const char* name, std::function<extension_t*()> f)
+{
+ extensions()[name] = f;
+}
+
+std::function<extension_t*()> find_extension(const char* name)
+{
+ if (!extensions().count(name)) {
+ // try to find extension xyz by loading libxyz.so
+ std::string libname = std::string("lib") + name + ".so";
+ if (!dlopen(libname.c_str(), RTLD_LAZY)) {
+ fprintf(stderr, "couldn't find extension '%s' (or library '%s')\n",
+ name, libname.c_str());
+ exit(-1);
+ }
+ if (!extensions().count(name)) {
+ fprintf(stderr, "couldn't find extension '%s' in shared library '%s'\n",
+ name, libname.c_str());
+ exit(-1);
+ }
+ }
+
+ return extensions()[name];
+}