static Delegate GetProcDelegate <TDelegate>(SafeFreeLibrary lib, string procName)
{
IntPtr funcPtr = NativeMethods.GetProcAddress(lib, procName);
if (funcPtr == IntPtr.Zero)
{
throw new Win32Exception(string.Format("Function '{0}' not found.", procName));
}
return(Marshal.GetDelegateForFunctionPointer(funcPtr, typeof(TDelegate)));
}
static void EnsureInitialized()
{
if (initialized)
{
return;
}
lock (syncRoot)
{
if (initialized)
{
return;
}
wasAPILib = NativeMethods.LoadLibraryEx(libName, IntPtr.Zero, NativeMethods.LOAD_WITH_ALTERED_SEARCH_PATH);
webhostRegisterProtocol = (WAPI.WebhostRegisterProtocol)GetProcDelegate <WAPI.WebhostRegisterProtocol>(wasAPILib, "WebhostRegisterProtocol");
webhostUnregisterProtocol = (WAPI.WebhostUnregisterProtocol)GetProcDelegate <WAPI.WebhostUnregisterProtocol>(wasAPILib, "WebhostUnregisterProtocol");
webhostOpenListenerChannelInstance = (WAPI.WebhostOpenListenerChannelInstance)GetProcDelegate <WAPI.WebhostOpenListenerChannelInstance>(wasAPILib, "WebhostOpenListenerChannelInstance");
webhostCloseAllListenerChannelInstances = (WAPI.WebhostCloseAllListenerChannelInstances)GetProcDelegate <WAPI.WebhostCloseAllListenerChannelInstances>(wasAPILib, "WebhostCloseAllListenerChannelInstances");
}
}
public static extern IntPtr GetProcAddress(
[In] SafeFreeLibrary hModule,
[In] string lpProcName);