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/* Copyright (C) 1995, 1996 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. */
/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
#ifndef SCM_FSU_PTHREADS_H
#define SCM_FSU_PTHREADS_H
#define PTHREAD_KERNEL
#include <pthread.h>
/* Identify where the stack pointer can be found in a jmpbuf.
*/
#if defined(__sparc_setjmp_h)
# define THREAD_SP machdep_data.machdep_state[2]
#endif
#if defined(linux)
# define THREAD_SP machdep_data.machdep_state[0].__sp
#endif
#if defined(sgi)
# define THREAD_SP machdep_data.machdep_state[JB_SP]
#endif
/* ...define THREAD_SP for your architecture here...
*/
#if !defined(THREAD_SP)
--> where is your stack pointer?
#endif
#define PTHREAD_MAX_PRIORITY 64
/* Boost the priority of this thread so that it is the only
one running. PTHREAD_MAX_PRIORITY is reserved for this
purpose */
#define SCM_THREAD_CRITICAL_SECTION_START \
struct sched_param param; \
int previous_prio; \
int policy; \
pthread_getschedparam(pthread_self(), &policy, ¶m); \
previous_prio = param.prio; \
param.prio = PTHREAD_MAX_PRIORITY; \
pthread_setschedparam(pthread_self(), policy, ¶m)
#define SCM_THREAD_CRITICAL_SECTION_END \
param.prio = previous_prio; \
pthread_setschedparam(pthread_self(), policy, ¶m)
#define SCM_THREAD_INITIALIZE_STORAGE \
scm_threads_init_mit_pthreads ()
#define SCM_NO_CRITICAL_SECTION_OWNER 0
#define SCM_DEFER_INTS \
do { \
SCM_IASSERT(scm_critical_section_owner != pthread_self()); \
pthread_mutex_lock(&scm_critical_section_mutex); \
scm_critical_section_owner = pthread_self(); \
scm_ints_disabled = 1; \
} while (0)
#define SCM_ALLOW_INTS \
do { \
SCM_IASSERT(scm_critical_section_owner == pthread_self()); \
scm_ints_disabled = 0; \
scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \
pthread_mutex_unlock(&scm_critical_section_mutex); \
SCM_CHECK_INTS; \
} while (0)
#define SCM_REDEFER_INTS \
do { \
if ((scm_critical_section_owner != pthread_self()) || \
(scm_critical_section_owner == SCM_NO_CRITICAL_SECTION_OWNER)) \
{ \
pthread_mutex_lock(&scm_critical_section_mutex); \
scm_critical_section_owner = pthread_self(); \
} \
++scm_ints_disabled; \
} while (0)
#define SCM_REALLOW_INTS \
do { \
SCM_IASSERT(scm_critical_section_owner == pthread_self()); \
--scm_ints_disabled; \
if (!scm_ints_disabled) \
{ \
scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \
pthread_mutex_unlock(&scm_critical_section_mutex); \
SCM_CHECK_INTS; \
} \
} while (0)
*fixme*
#define scm_root ((scm_root_state *) pthread_self()->prots)
#define scm_set_root(new_root) (pthread_self()->prots = (new_root))
void scm_threads_init_mit_pthreads ();
typedef struct QUEUE {
struct QUEUE *flink, *blink;
} queue;
extern pthread_mutex_t scm_critical_section_mutex;
extern pthread_t scm_critical_section_owner;
/* Key to thread specific data */
extern pthread_key_t info_key;
struct scm_pthread_create_info_type
{
SCM thunk;
SCM error;
SCM *prots;
} scm_pthread_create_info;
#endif
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