Add a class for loading and accessing modules at runtime

[libs/core.git] / source / core / unix / module.cpp

diff --git a/source/core/unix/module.cpp b/source/core/unix/module.cpp
new file mode 100644 (file)
index 0000000..04b9531
--- /dev/null
+++ b/source/core/unix/module.cpp
@@ -0,0 +1,40 @@
+#include <dlfcn.h>
+#include "module.h"
+#include "module_private.h"
+#include "systemerror.h"
+
+using namespace std;
+
+namespace Msp {
+
+Module::Module(const string &name)
+{
+       ModuleHandle handle = dlopen(name.c_str(), RTLD_NOW);
+       if(!handle)
+               throw system_error("dlopen", dlerror());
+
+       priv = new Private;
+       priv->handle = handle;
+}
+
+Module::~Module()
+{
+       dlclose(priv->handle);
+       delete priv;
+}
+
+void *Module::get_symbol(const string &name) const
+{
+       dlerror();
+       void *result = dlsym(priv->handle, name.c_str());
+       if(!result)
+       {
+               const char *err = dlerror();
+               if(err)
+                       throw system_error("dlsym", err);
+       }
+
+       return result;
+}
+
+} // namespace Msp