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/* classes: h_files */
#ifndef SCM_COOP_PTHREADS_H
#define SCM_COOP_PTHREADS_H
/* Copyright (C) 2002 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* The coop-pthreads implementation. We use pthreads for the basic
multi threading stuff, but rig it so that only one thread is ever
active inside Guile.
*/
#include <pthread.h>
#include "libguile/iselect.h"
#if (SCM_ENABLE_DEPRECATED == 1)
/* Thread local data support --- generic C API */
typedef pthread_key_t scm_t_key;
#define scm_key_create pthread_key_create
#define scm_setspecific pthread_setspecific
#define scm_getspecific pthread_getspecific
#define scm_key_delete pthread_key_delete
#endif /* SCM_ENABLE_DEPRECATED == 1 */
/* Since only one thread can be active anyway, we don't need to do
anything special around critical sections. In fact, that's the
reason we do only support cooperative threading: Guile's critical
regions have not been completely identified yet. (I think.) */
#define SCM_CRITICAL_SECTION_START
#define SCM_CRITICAL_SECTION_END
#define SCM_I_THREAD_SWITCH_COUNT 50
#define SCM_THREAD_SWITCHING_CODE \
do { \
scm_i_switch_counter--; \
if (scm_i_switch_counter == 0) \
{ \
scm_i_switch_counter = SCM_I_THREAD_SWITCH_COUNT; \
scm_yield(); \
} \
} while (0)
SCM_API int scm_i_switch_counter;
#define SCM_THREAD_LOCAL_DATA (scm_i_copt_thread_data)
#define SCM_SET_THREAD_LOCAL_DATA(ptr) (scm_i_copt_set_thread_data (ptr))
SCM_API void *scm_i_copt_thread_data;
SCM_API void scm_i_copt_set_thread_data (void *data);
#endif /* SCM_COOP_PTHREAD_H */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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