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90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/* classes: h_files */
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#ifndef SCM_FUTURES_H
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#define SCM_FUTURES_H
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/* Copyright (C) 2002, 2003, 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if 0
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/* Futures have the following known bugs, which should be fixed before
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including them in Guile:
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- The implementation of the thread cache needs to be better so that
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it behaves reasonable under heavy use.
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- The dynamic state of a thread needs to be properly initialized
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when it is retrieved from the cache.
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*/
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#include "libguile/__scm.h"
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#include "libguile/threads.h"
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typedef struct scm_t_future {
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SCM data;
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scm_i_pthread_mutex_t mutex;
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scm_i_pthread_cond_t cond;
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int status;
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int die_p;
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} scm_t_future;
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#define SCM_FUTURE_DEAD 0
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#define SCM_FUTURE_SIGNAL_ME -1
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#define SCM_FUTURE_COMPUTING 1
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#define SCM_FUTURE_TASK_ASSIGNED 2
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#define SCM_VALIDATE_FUTURE(pos, obj) \
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SCM_ASSERT_TYPE (SCM_TYP16_PREDICATE (scm_tc16_future, obj), \
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obj, pos, FUNC_NAME, "future");
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#define SCM_FUTURE(future) ((scm_t_future *) SCM_SMOB_DATA_2 (future))
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#define SCM_FUTURE_MUTEX(future) (&SCM_FUTURE (future)->mutex)
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#define SCM_FUTURE_COND(future) (&SCM_FUTURE (future)->cond)
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#define SCM_FUTURE_STATUS(future) (SCM_FUTURE (future)->status)
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#define SCM_SET_FUTURE_STATUS(future, x) \
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do { SCM_FUTURE (future)->status = (x); } while (0)
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#define SCM_FUTURE_ALIVE_P(future) (SCM_FUTURE_STATUS (future))
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#define SCM_FUTURE_DATA(future) (SCM_FUTURE (future)->data)
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#define SCM_SET_FUTURE_DATA(future, x) \
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do { SCM_FUTURE (future)->data = (x); } while (0)
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#define SCM_FUTURE_NEXT SCM_SMOB_OBJECT
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#define SCM_FUTURE_NEXTLOC SCM_SMOB_OBJECT_LOC
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#define SCM_SET_FUTURE_NEXT SCM_SET_SMOB_OBJECT
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SCM_API scm_t_bits scm_tc16_future;
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extern SCM *scm_loc_sys_thread_handler;
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SCM_API SCM scm_i_make_future (SCM thunk);
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SCM_API SCM scm_make_future (SCM thunk);
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SCM_API SCM scm_future_ref (SCM future);
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void scm_init_futures (void);
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#endif /* Futures are disabled for now. */
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#endif /* SCM_FUTURES_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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