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b0ce014801
This way we don't allocate an untagged wake data, and we don't need a type tag. On the other hand we have to roll a more complicated seqlock, but that's fine. Also switch to require C11 atomics. * libguile/atomics-internal.h: Remove fallback for when we don't have C11 atomics. (scm_atomic_ref_uint32, scm_atomic_swap_uint32, scm_atomic_set_uint32): New helpers. * libguile/threads-internal.h: * libguile/async.h: * libguile/async.c: Inline the thread wake data. Happily, waking a remote thread is still wait-free from both sides.
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
#ifndef SCM_ASYNC_H
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#define SCM_ASYNC_H
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/* Copyright 1995-1998,2000-2002,2004-2006,2008-2009,2011,2014,2018,2025
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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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#include "libguile/threads.h"
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#define SCM_TICK scm_async_tick ()
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SCM_API void scm_async_tick (void);
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SCM_API void scm_switch (void);
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SCM_API SCM scm_system_async_mark (SCM a);
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SCM_API SCM scm_system_async_mark_for_thread (SCM a, SCM thread);
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SCM_API int scm_c_prepare_to_wait_on_fd (int fd);
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SCM_API int scm_c_prepare_to_wait_on_cond (scm_i_pthread_mutex_t *m,
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scm_i_pthread_cond_t *c);
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SCM_API void scm_c_wait_finished (void);
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SCM_API SCM scm_noop (SCM args);
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SCM_API SCM scm_call_with_blocked_asyncs (SCM proc);
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SCM_API SCM scm_call_with_unblocked_asyncs (SCM proc);
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SCM_API void *scm_c_call_with_blocked_asyncs (void *(*p) (void *d), void *d);
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SCM_API void *scm_c_call_with_unblocked_asyncs (void *(*p) (void *d), void *d);
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SCM_API void scm_dynwind_block_asyncs (void);
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SCM_API void scm_dynwind_unblock_asyncs (void);
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SCM_INTERNAL void scm_i_wait_finished (scm_thread *);
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SCM_INTERNAL int scm_i_prepare_to_wait_on_fd (scm_thread *, int);
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SCM_INTERNAL int scm_i_prepare_to_wait_on_cond (scm_thread *,
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scm_i_pthread_mutex_t *,
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scm_i_pthread_cond_t *);
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SCM_INTERNAL void scm_i_async_push (scm_thread *t, SCM proc);
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SCM_INTERNAL SCM scm_i_async_pop (scm_thread *t);
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SCM_INTERNAL void scm_init_async (void);
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#endif /* SCM_ASYNC_H */
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