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81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/* classes: h_files */
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#ifndef SCM_COOP_PTHREADS_H
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#define SCM_COOP_PTHREADS_H
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/* Copyright (C) 2002 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
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* License as published by the Free Software Foundation; either
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* version 2.1 of 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,
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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* The coop-pthreads implementation. We use pthreads for the basic
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multi threading stuff, but rig it so that only one thread is ever
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active inside Guile.
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*/
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#include <pthread.h>
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#include "libguile/iselect.h"
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#if (SCM_ENABLE_DEPRECATED == 1)
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/* Thread local data support --- generic C API */
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typedef pthread_key_t scm_t_key;
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#define scm_key_create pthread_key_create
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#define scm_setspecific pthread_setspecific
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#define scm_getspecific pthread_getspecific
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#define scm_key_delete pthread_key_delete
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#endif /* SCM_ENABLE_DEPRECATED == 1 */
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/* Since only one thread can be active anyway, we don't need to do
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anything special around critical sections. In fact, that's the
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reason we do only support cooperative threading: Guile's critical
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regions have not been completely identified yet. (I think.) */
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#define SCM_CRITICAL_SECTION_START
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#define SCM_CRITICAL_SECTION_END
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#define SCM_I_THREAD_SWITCH_COUNT 50
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#define SCM_THREAD_SWITCHING_CODE \
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do { \
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scm_i_switch_counter--; \
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if (scm_i_switch_counter == 0) \
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{ \
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scm_i_switch_counter = SCM_I_THREAD_SWITCH_COUNT; \
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scm_yield(); \
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} \
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} while (0)
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SCM_API int scm_i_switch_counter;
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#define SCM_THREAD_LOCAL_DATA (scm_i_copt_thread_data)
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#define SCM_SET_THREAD_LOCAL_DATA(ptr) (scm_i_copt_set_thread_data (ptr))
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SCM_API void *scm_i_copt_thread_data;
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SCM_API void scm_i_copt_set_thread_data (void *data);
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#endif /* SCM_COOP_PTHREAD_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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