the wind chain explicitely. Use scm_c_with_fluid for the common
case of only one fluid.
(scm_with_fluid): New.
(scm_c_with_fluid): Use frames instead of scm_c_with_fluids.
* fluids.h, fluids.c (scm_frame_fluid): New.
(scm_with_fluid): New.
(scm_i_swap_fluids, scm_i_swap_fluids_reverse): Removed.
the unwinding directly. It is simple enough.
* dynwind.h, dynwind.c: Did the following renamings:
scm_begin_frame -> scm_frame_begin,
scm_end_frame -> scm_frame_end,
scm_on_unwind -> scm_frame_unwind,
scm_on_rewind -> scm_frame_rewind,
scm_on_unwind_with_scm -> scm_frame_unwind_with_scm,
scm_on_rewind_with_scm -> scm_frame_rewind_with_scm.
Changed all uses.
part of copy_stack_and_call.
(copy_stack_and_call): Copy the stack after unwinding and before
rewinding.
(scm_dynthrow): Do not call scm_dowinds, this is now done by
copy_stack_and_call.
scm_begin_frame, scm_end_frame, scm_on_unwind, scm_on_rewind):
New.
(scm_dowinds, scm_i_dowinds): scm_dowinds has been renamed to
scm_i_dowinds and extended to handle frames and to invoke a 'turn'
function when the outermost wind point has been reached. The
latter is used to copy a continuation stack at the right time.
scm_dowinds remains available.
(SCM_GUARDSP, SCM_BEFORE_GUARD, SCM_AFTER_GUARD, SCM_GUARD_DATA,
tc16_guard, guards_print): Removed.
(scm_internal_dynamic_wind): Reimplemented using frames.
(m_body): Fixed comment.
(scm_m_define): Don't generate memoized code for definitions that
are not on the top level. As a consequence, no memoized code at
all is generated for definitions any more: Top level definitions
are executed immediately during memoization and internal
definitions are handled separately in m_expand_body.
(scm_unmemocopy, unmemocopy): Removed code for unmemoizing
definitions. Consequently, there is no unmemoizing code any more
that might modify the environment. Thus, the old scm_unmemocopy
is removed and the old unmemocopy is renamed to scm_unmemocopy.
(SCM_CEVAL): The SCM_IM_DEFINE keyword can no longer occur in
memoized code. Call EVALCAR for continuations. Prefer !SCM_NULLP
over SCM_NIMP in places, where the argument is known to be part of
a proper list.
