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14aa25e410
* libguile/debug.h (scm_t_debug_frame): Remove this type, as it was
internal to the old evaluator.
(SCM_EVALFRAME, SCM_APPLYFRAME, SCM_VOIDFRAME, SCM_MACROEXPF)
(SCM_TAILREC, SCM_TRACED_FRAME, SCM_ARGS_READY, SCM_DOVERFLOW)
(SCM_MAX_FRAME_SIZE, SCM_FRAMETYPE)
(SCM_EVALFRAMEP, SCM_APPLYFRAMEP, SCM_VOIDFRAMEP, SCM_MACROEXPFP)
(SCM_TAILRECP, SCM_TRACED_FRAME_P, SCM_ARGS_READY_P, SCM_OVERFLOWP)
(SCM_SET_MACROEXP, SCM_SET_TAILREC, SCM_SET_TRACED_FRAME)
(SCM_SET_ARGSREADY, SCM_SET_OVERFLOW)
(SCM_CLEAR_MACROEXP, SCM_CLEAR_TRACED_FRAME, SCM_CLEAR_ARGSREADY):
Remove macro accessors to scm_t_debug_frame.
(SCM_DEBUGOBJP, SCM_DEBUGOBJ_FRAME, SCM_SET_DEBUGOBJ_FRAME):
(scm_debug_object_p, scm_make_debugobj): Remove debugobj accessors.
(scm_i_unmemoize_expr): Remove unused declaration.
* libguile/debug.c (scm_debug_options): No more max limit on frame
sizes.
(scm_start_stack): Just call out to scm_vm_call_with_new_stack.
(scm_debug_object_p, scm_make_debugobj, scm_init_debug): No more
debugobj smob type.
* libguile/deprecated.h:
* libguile/deprecated.c (scm_i_deprecated_last_debug_frame)
(scm_last_debug_frame): Remove deprecated debug-frame bits.
* libguile/stacks.c (scm_make_stack): Rework this function and its
dependents to only walk VM frames.
(scm_stack_id): Call out to the holder of the VM frame in question,
which should be a VM or a VM continuation, for the stack ID. Currently
this bit is stubbed out.
(scm_last_stack_frame): Removed. It seems this is mainly useful for a
debugger, and we need to rewrite the debugger to work on the Scheme
level.
* test-suite/tests/continuations.test ("continuations"): Remove test for
last-stack-frame.
* libguile/continuations.h (struct scm_t_contregs):
* libguile/continuations.c (scm_make_continuation):
(copy_stack_and_call, scm_i_with_continuation_barrier): No need to
save and restore debug frames.
* libguile/threads.h (scm_i_thread): Don't track debug frames.
(scm_i_last_debug_frame, scm_i_set_last_debug_frame): Remove macro
accessors.
* libguile/threads.c (guilify_self_1): Don't track debug frames.
* libguile/throw.c: No need to track debug frames in a jmpbuf.
* libguile/vm-engine.c (vm_engine, VM_PUSH_DEBUG_FRAMES): Don't push
debug frames.
* libguile/vm.h:
* libguile/vm.c (scm_vm_call_with_new_stack): New function. Currently
stubbed out though.
106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
/* classes: h_files */
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#ifndef SCM_CONTINUATIONS_H
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#define SCM_CONTINUATIONS_H
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/* Copyright (C) 1995,1996,2000,2001, 2006, 2008, 2009 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include "libguile/__scm.h"
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#ifdef __ia64__
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#include <signal.h>
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#include <ucontext.h>
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#endif /* __ia64__ */
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/* a continuation SCM is a non-immediate pointing to a heap cell with:
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word 0: bits 0-15: smob type tag: scm_tc16_continuation.
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bits 16-31: unused.
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word 1: malloc block containing an scm_t_contregs structure with a
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tail array of SCM_STACKITEM. the size of the array is stored
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in the num_stack_items field of the structure.
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*/
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SCM_API scm_t_bits scm_tc16_continuation;
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typedef struct
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{
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SCM throw_value;
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scm_i_jmp_buf jmpbuf;
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SCM dynenv;
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#ifdef __ia64__
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void *backing_store;
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unsigned long backing_store_size;
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#endif /* __ia64__ */
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size_t num_stack_items; /* size of the saved stack. */
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SCM root; /* continuation root identifier. */
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SCM vm_conts; /* vm continuations (they use separate stacks) */
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/* The offset from the live stack location to this copy. This is
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used to adjust pointers from within the copied stack to the stack
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itself.
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Thus, when you read a pointer from the copied stack that points
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into the live stack, you need to add OFFSET so that it points
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into the copy.
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*/
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scm_t_ptrdiff offset;
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SCM_STACKITEM stack[1]; /* copied stack of size num_stack_items. */
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} scm_t_contregs;
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#define SCM_CONTINUATIONP(x) SCM_TYP16_PREDICATE (scm_tc16_continuation, x)
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#define SCM_CONTREGS(x) ((scm_t_contregs *) SCM_CELL_WORD_1 (x))
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#define SCM_CONTINUATION_LENGTH(x) (SCM_CONTREGS (x)->num_stack_items)
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#define SCM_SET_CONTINUATION_LENGTH(x, n)\
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(SCM_CONTREGS (x)->num_stack_items = (n))
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#define SCM_JMPBUF(x) ((SCM_CONTREGS (x))->jmpbuf)
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#define SCM_DYNENV(x) ((SCM_CONTREGS (x))->dynenv)
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#define SCM_THROW_VALUE(x) ((SCM_CONTREGS (x))->throw_value)
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#define SCM_CONTINUATION_ROOT(x) ((SCM_CONTREGS (x))->root)
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#define SCM_DFRAME(x) ((SCM_CONTREGS (x))->dframe)
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SCM_API SCM scm_make_continuation (int *first);
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SCM_API void *scm_c_with_continuation_barrier (void *(*func)(void*), void *);
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SCM_API SCM scm_with_continuation_barrier (SCM proc);
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SCM_INTERNAL SCM
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scm_i_with_continuation_barrier (scm_t_catch_body body,
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void *body_data,
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scm_t_catch_handler handler,
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void *handler_data,
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scm_t_catch_handler pre_unwind_handler,
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void *pre_unwind_handler_data);
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SCM_INTERNAL void scm_init_continuations (void);
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#endif /* SCM_CONTINUATIONS_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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