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/* classes: h_files */
#ifndef SCM_FUTURES_H
#define SCM_FUTURES_H
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
#include "libguile/__scm.h"
#include "libguile/threads.h"
typedef struct scm_t_future {
SCM data;
scm_t_mutex mutex;
scm_t_cond cond;
int status;
int die_p;
} scm_t_future;
#define SCM_FUTURE_DEAD 0
#define SCM_FUTURE_SIGNAL_ME -1
#define SCM_FUTURE_COMPUTING 1
#define SCM_FUTURE_TASK_ASSIGNED 2
#define SCM_VALIDATE_FUTURE(pos, obj) \
SCM_ASSERT_TYPE (SCM_TYP16_PREDICATE (scm_tc16_future, obj), \
obj, pos, FUNC_NAME, "future");
#define SCM_FUTURE(future) ((scm_t_future *) SCM_CELL_WORD_2 (future))
#define SCM_FUTURE_MUTEX(future) (&SCM_FUTURE (future)->mutex)
#define SCM_FUTURE_COND(future) (&SCM_FUTURE (future)->cond)
#define SCM_FUTURE_STATUS(future) (SCM_FUTURE (future)->status)
#define SCM_SET_FUTURE_STATUS(future, x) \
do { SCM_FUTURE (future)->status = (x); } while (0)
#define SCM_FUTURE_ALIVE_P(future) (SCM_FUTURE_STATUS (future))
#define SCM_FUTURE_DATA(future) (SCM_FUTURE (future)->data)
#define SCM_SET_FUTURE_DATA(future, x) \
do { SCM_FUTURE (future)->data = (x); } while (0)
#define SCM_FUTURE_NEXT SCM_CELL_OBJECT_1
#define SCM_FUTURE_NEXTLOC(x) ((SCM *) SCM_CELL_WORD_LOC ((x), 1))
#define SCM_SET_FUTURE_NEXT SCM_SET_CELL_OBJECT_1
SCM_API scm_t_bits scm_tc16_future;
extern SCM *scm_loc_sys_thread_handler;
SCM_API SCM scm_i_make_future (SCM thunk);
SCM_API SCM scm_make_future (SCM thunk);
SCM_API SCM scm_future_ref (SCM future);
void scm_init_futures (void);
#endif /* SCM_FUTURES_H */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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