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12da6739b1
* libguile/continuations-internal.h: New file, for internal definitions. * libguile/continuations.h: Move out internal definitions. * libguile/Makefile.am: Add new file. * libguile/continuations.c: Adapt to put the tag in the beginning of the continuation (contregs) structure. * libguile/eq.c: * libguile/goops.c: * libguile/init.c: * libguile/print.c: * libguile/scm.h: * libguile/stacks.c: * libguile/vm.c: * module/oop/goops.scm: Adapt to contregs tc16 change.
108 lines
3 KiB
C
108 lines
3 KiB
C
#ifndef SCM_CONTINUATIONS_INTERNAL_H
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#define SCM_CONTINUATIONS_INTERNAL_H
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/* Copyright 1995-1996,2000-2001,2006,2008-2010,2012-2014,2018,2025
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Free Software Foundation, Inc.
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This file is part of Guile.
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Guile is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Guile is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with Guile. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _WIN64
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#include <setjmp.h>
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#else
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#include "libguile/setjump-win.h"
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#endif
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#include "libguile/gc.h"
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#include "libguile/scm.h"
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#include "libguile/throw.h"
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struct scm_vm_cont;
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struct scm_continuation
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{
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scm_t_bits tag;
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jmp_buf jmpbuf;
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#if SCM_HAVE_AUXILIARY_STACK
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void *auxiliary_stack;
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unsigned long auxiliary_stack_size;
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#endif
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SCM root; /* continuation root identifier. */
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struct scm_vm_cont *vm_cont; /* vm's stack and regs */
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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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ptrdiff_t offset;
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size_t num_stack_items; /* size of the saved stack. */
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SCM_STACKITEM stack[]; /* copied stack of size num_stack_items. */
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};
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static inline int
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scm_is_continuation (SCM c)
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{
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return SCM_HAS_TYP16 (c, scm_tc16_continuation);
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}
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static inline struct scm_continuation*
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scm_to_continuation (SCM c)
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{
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if (!scm_is_continuation (c))
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abort ();
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return (struct scm_continuation*) SCM_UNPACK_POINTER (c);
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}
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static inline SCM
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scm_from_continuation (struct scm_continuation* c)
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{
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return SCM_PACK_POINTER (c);
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}
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SCM_INTERNAL SCM
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scm_i_make_continuation (scm_thread *thread, struct scm_vm_cont *vm_cont);
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SCM_INTERNAL void scm_i_reinstate_continuation (struct scm_continuation *cont,
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uint8_t *mra) SCM_NORETURN;
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SCM_INTERNAL int scm_i_continuation_to_frame (SCM cont,
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struct scm_frame *frame);
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SCM_INTERNAL int scm_i_print_continuation (SCM cont, SCM port,
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scm_print_state *state);
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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_INTERNAL_H */
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