Scheme.
* throw.h (scm_catch_body_t, scm_catch_handler_t): New types.
(scm_internal_catch): New function, replaces...
(scm_catch_apply): Deleted.
* throw.c (scm_catch_apply): Deleted; replaced with a more general
mechanism which is a bit more code, but can be used nicely from C
and implement the Scheme semantics as well.
(scm_internal_catch): This is the replacement; it's named after
the analogous function in Emacs.
(scm_catch): Reimplemented in terms of the above.
(struct catch_body_data, catch_body, catch_handler): New
functions, used by scm_catch.
* root.c (cwdr): Reimplemented in terms of scm_internal_catch.
(struct cwdr_body_data, cwdr_body, cwdr_handler): New functions;
support for new cwdr.
eval.h, feature.c, filesys.c, fports.c, gc.c, gsubr.c, init.c,
ioext.c, kw.c, list.c, load.c, mallocs.c, numbers.c, numbers.h,
pairs.c, pairs.h, ports.c, ports.h, posix.c, procprop.c, procs.c,
procs.h, ramap.c, read.c, root.c, srcprop.c, srcprop.h,
strports.c, symbols.c, tags.h, throw.c, unif.c, variable.c,
vports.c: Cleaned up use of pairs: Don't make any special
assumptions about the internal structure of selectors and
mutators: SCM_CXR (<e1>) = <e2> --> SCM_SETCXR (<e1>, <e2>),
SCM_CXR (<e1>) &= <e2> --> SCM_SETAND_CXR (<e1>, <e2>) etc.
(Among other things, this change makes it easier to build Guile
with certain compilers which have problems with casted lvalues.)
throw.c: Renamed last_debug_info_frame -> scm_last_debug_frame.
* root.c: Renamed `call-with-new-root' -->
`call-with-dynamic-root'.
(cwdr): Removed allocation of new root state. This should be done
separately by use of scm_make_root.
(scm_apply_with_dynamic_root): New function: Does what it
sounds like. Needed when spawning threads.
* throw.c: Renamed scm_catch --> scm_catch_apply and added more
arguments. The motivation is that code in root.c needs catch
functionality, and we want to avoid code duplication.
New functions: scm_catch, scm_lazy_catch. These are wrappers for
scm_catch_apply. scm_lazy_catch is intended to introduce catch
handlers that run without popping the stack into the dynwind
chain.
SCM_THREAD_CRITICAL_SECTION_END. Moved marking of root data to
root.c:mark_root.
* * root.c, root.h: Added root smob.
(cwdr, scm_call_with_new_root, scm_dynamic_root, scm_app_wdr): New
functions: Implements dynamic roots mostly according to spec in
SCM manual. Main difference is that the second argument is a
throw handler rather than an error "thunk".
* root.c: Added #include "genio.h", #include "smob.h", #include
"pairs.h", #include "throw.h", #include "dynwind.h", #include
"eval.h"
(scm_init_root): Added #include "root.x".
