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* libguile/Makefile.am: * libguile/atomic.h: Make private. Define "struct scm_atomic_box". * libguile/atomic.c: Allocate scm_atomic_box via scm_allocate_tagged.
81 lines
2 KiB
C
81 lines
2 KiB
C
#ifndef SCM_ATOMIC_H
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#define SCM_ATOMIC_H
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/* Copyright 2016,2018,2025
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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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#include "libguile/gc.h"
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/* Atomic boxes
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*/
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struct scm_atomic_box
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{
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scm_t_bits tag;
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SCM value;
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};
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static inline int
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scm_is_atomic_box (SCM x)
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{
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return SCM_HAS_TYP7 (x, scm_tc7_atomic_box);
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}
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static inline struct scm_atomic_box *
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scm_to_atomic_box (SCM x)
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{
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if (!scm_is_atomic_box (x))
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abort ();
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return (struct scm_atomic_box *) SCM_UNPACK_POINTER (x);
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}
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static inline SCM
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scm_from_atomic_box (struct scm_atomic_box *box)
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{
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return SCM_PACK_POINTER (box);
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}
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static inline SCM*
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scm_atomic_box_loc (struct scm_atomic_box *box)
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{
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return &box->value;
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}
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#define SCM_VALIDATE_ATOMIC_BOX(pos, var) \
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do { \
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SCM_ASSERT_TYPE (scm_is_atomic_box (var), var, pos, FUNC_NAME, \
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"atomic box"); \
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} while (0)
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SCM_INTERNAL SCM scm_make_atomic_box (SCM init);
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SCM_INTERNAL SCM scm_atomic_box_p (SCM obj);
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SCM_INTERNAL SCM scm_atomic_box_ref (SCM box);
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SCM_INTERNAL SCM scm_atomic_box_set_x (SCM box, SCM val);
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SCM_INTERNAL SCM scm_atomic_box_swap_x (SCM box, SCM val);
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SCM_INTERNAL SCM scm_atomic_box_compare_and_swap_x (SCM box, SCM expected, SCM desired);
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SCM_INTERNAL void scm_i_atomic_box_print (SCM box, SCM port, scm_print_state *pstate);
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SCM_INTERNAL void scm_register_atomic (void);
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#endif /* SCM_ATOMIC_H */
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