typedef struct SilcStackFrameStruct SilcStackFrame;

    Static stack frame context that optionally can be used as stack
    frame in SilcStack.  By default silc_stack_push use pre-allocated
    stack frame (or allocates new one if all frames are reserved), but
    user may also use statically allocated SilcStackFrame instead.  This
    is recommended when using SilcStack in recursive routine and the
    recursion may become deep.  Using static frame assures that during
    recursion frames never run out and silc_stack_push never allocates
    any memory.  In other normal usage statically allocated SilcStackFrame
    is not needed, unless performance is critical.