/// <summary>Creates a wrapper for the given function of the given module.
/// <para>Since EFL 1.23.</para>
/// </summary>
/// <param name="module">The module wrapper containing the function.</param>
/// <param name="functionName">The name of the function to search for.</param>
internal FunctionWrapper(NativeModule module, string functionName)
{
this.module = module;
loadResult = new Lazy <FunctionLoadResult <T> >
(() =>
{
return(LazyInitialization(module, functionName));
});
}
/// <summary>Loads a function pointer from the given module.
/// <para>Since EFL 1.23.</para>
/// </summary>
/// <param name="moduleName">The name of the module containing the function.</param>
/// <param name="functionName">The name of the function to search for.</param>
/// <returns>A function pointer that can be used with delegates.</returns>
internal static IntPtr LoadFunctionPointer(string moduleName, string functionName)
{
IntPtr module = NativeModule.LoadLibrary(moduleName);
Eina.Log.Debug($"searching {module} for {functionName}");
var s = FunctionInterop.dlsym(module, functionName);
Eina.Log.Debug($"searching {module} for{functionName}, result {s}");
return(s);
}
///<summary>Loads a function pointer from the given module.</summary>
///<param name="moduleName">The name of the module containing the function.</param>
///<param name="functionName">The name of the function to search for.</param>
///<returns>A function pointer that can be used with delegates.</returns>
public static IntPtr LoadFunctionPointer(string moduleName, string functionName)
{
NativeModule module = new NativeModule(moduleName);
Eina.Log.Debug($"searching {module.Module} for {functionName}");
var s = FunctionInterop.dlsym(module.Module, functionName);
Eina.Log.Debug($"searching {module.Module} for{functionName}, result {s}");
return(s);
}
private NativeModule module; // so it doesn't get unloaded
#pragma warning restore 0414
private static FunctionLoadResult <T> LazyInitialization(NativeModule module, string functionName)
{
if (module.Module == IntPtr.Zero)
{
return(new FunctionLoadResult <T>(FunctionLoadResultKind.LibraryNotFound));
}
else
{
IntPtr funcptr = FunctionInterop.LoadFunctionPointer(module.Module, functionName);
if (funcptr == IntPtr.Zero)
{
return(new FunctionLoadResult <T>(FunctionLoadResultKind.FunctionNotFound));
}
else
{
return(new FunctionLoadResult <T>(Marshal.GetDelegateForFunctionPointer <T>(funcptr)));
}
}
}
