Macro comedy::call_handle_getter

macro_rules! call_handle_getter {
    ($f:ident ( $($arg:expr),* )) => { ... };
    ($f:ident ( $($arg:expr),+ , )) => { ... };
}

Call a function that returns a HANDLE (NULL or INVALID_HANDLE_VALUE on failure), wrap result.

The handle is wrapped in a Handle which will automatically call CloseHandle() on it. If the function fails, the error is retrieved via GetLastError() and augmented with the name of the function and the file and line number of the macro usage.

Example

unsafe fn find_first(name: &[u16], data: &mut WIN32_FIND_DATAW) -> Result<Handle, Win32Error> {
    call_handle_getter!(FindFirstFileW(name.as_ptr(), data))
}