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28d52ebb19
Simply lock a thread C API recursive mutex. (SCM_NONREC_CRITICAL_SECTION_START, SCM_NONREC_CRITICAL_SECTION_END, SCM_REC_CRITICAL_SECTION_START, SCM_REC_CRITICAL_SECTION_END): Removed. * eval.c: Replaced SOURCE_SECTION_START / SOURCE_SECTION_END with direct calls to scm_rec_mutex_lock / unlock around the three calls to scm_m_expand_body. * eval.c, eval.h (promise_free): New function. (scm_force): Rewritten; Now thread-safe; Removed SCM_DEFER/ALLOW_INTS. * pthread-threads.h: Added partially implemented plugin interface for recursive mutexes. These are, for now, only intended to be used internally within the Guile implementation. * pthread-threads.c: New file. * threads.c: Conditionally #include "pthread-threads.c". * eval.c, eval.h (scm_makprom, scm_force): Rewritten to be thread-safe; * snarf.h (SCM_MUTEX, SCM_GLOBAL_MUTEX, SCM_REC_MUTEX, SCM_GLOBAL_REC_MUTEX): New macros. * eval.c, threads.c, threads.h, snarf.h: Rewrote critical section macros---use mutexes instead. * tags.h (SCM_IM_FUTURE): New tag. * eval.c (scm_m_future): New primitive macro. (SCM_CEVAL): Support futures. (unmemocopy): Support unmemoization of futures. * print.c (scm_isymnames): Name of future isym.
126 lines
4.7 KiB
C
126 lines
4.7 KiB
C
/* classes: h_files */
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#ifndef SCM_THREADS_PTHREADS_H
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#define SCM_THREADS_PTHREADS_H
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/* Copyright (C) 2002 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* The pthreads-threads implementation. This is a direct mapping.
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*/
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/* This is an interface between Guile and the pthreads thread package. */
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#include <pthread.h>
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/* MDJ 021209 <djurfeldt@nada.kth.se>:
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The separation of the plugin interface and the low-level C API
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(currently in threads.h) needs to be completed in a sensible way.
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*/
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/* The scm_t_ types are temporarily used both in plugin and low-level API */
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#define scm_t_thread pthread_t
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#define scm_i_plugin_thread_create pthread_create
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#define scm_i_plugin_thread_join pthread_join
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#define scm_i_plugin_thread_detach pthread_detach
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#define scm_i_plugin_thread_self pthread_self
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#define scm_t_mutex pthread_mutex_t
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#define scm_t_mutexattr pthread_mutexattr_t
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extern scm_t_mutexattr scm_i_plugin_mutex; /* The "fast" mutex. */
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#define scm_i_plugin_mutex_init pthread_mutex_init
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#define scm_i_plugin_mutex_destroy pthread_mutex_destroy
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#define scm_i_plugin_mutex_lock pthread_mutex_lock
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#define scm_i_plugin_mutex_trylock pthread_mutex_trylock
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#define scm_i_plugin_mutex_unlock pthread_mutex_unlock
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#define SCM_REC_MUTEX_MAXSIZE (8 * sizeof (long))
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typedef struct { char _[SCM_REC_MUTEX_MAXSIZE]; } scm_t_rec_mutex;
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extern scm_t_mutexattr scm_i_plugin_rec_mutex;
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#ifdef PTHREAD_MUTEX_RECURSIVE /* pthreads has recursive mutexes! */
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#define scm_i_plugin_rec_mutex_init pthread_mutex_init
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#define scm_i_plugin_rec_mutex_destroy pthread_mutex_destroy
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#define scm_i_plugin_rec_mutex_lock pthread_mutex_lock
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#define scm_i_plugin_rec_mutex_trylock pthread_mutex_trylock
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#define scm_i_plugin_rec_mutex_unlock pthread_mutex_unlock
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#else
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int scm_i_plugin_rec_mutex_init (scm_t_rec_mutex *, const scm_t_mutexattr *);
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#define scm_i_plugin_rec_mutex_destroy(mx) do { (void) (mx); } while (0)
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int scm_i_plugin_rec_mutex_lock (scm_t_rec_mutex *);
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int scm_i_plugin_rec_mutex_trylock (scm_t_rec_mutex *);
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int scm_i_plugin_rec_mutex_unlock (scm_t_rec_mutex *);
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#endif
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#define scm_t_cond pthread_cond_t
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#define scm_i_plugin_cond_init pthread_cond_init
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#define scm_i_plugin_cond_destroy pthread_cond_destroy
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#define scm_i_plugin_cond_wait pthread_cond_wait
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#define scm_i_plugin_cond_timedwait pthread_cond_timedwait
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#define scm_i_plugin_cond_signal pthread_cond_signal
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#define scm_i_plugin_cond_broadcast pthread_cond_broadcast
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#define scm_t_key pthread_key_t
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#define scm_i_plugin_key_create pthread_key_create
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#define scm_i_plugin_key_delete pthread_key_delete
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#define scm_i_plugin_setspecific pthread_setspecific
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#define scm_i_plugin_getspecific pthread_getspecific
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#define scm_i_plugin_select select
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void scm_init_pthread_threads (void);
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#endif /* SCM_THREADS_NULL_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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