mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-02 12:50:14 +02:00
c44bfbc946
errno macro expansion of this field name. (errno is a C preprocessor macro on some systems.)
164 lines
4.6 KiB
C
164 lines
4.6 KiB
C
/* classes: h_files */
|
||
|
||
#ifndef COOP_DEFSH
|
||
#define COOP_DEFSH
|
||
|
||
/* Copyright (C) 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. */
|
||
|
||
|
||
# ifdef TIME_WITH_SYS_TIME
|
||
# include <sys/time.h>
|
||
# include <time.h>
|
||
# else
|
||
# ifdef HAVE_SYS_TIME_H
|
||
# include <sys/time.h>
|
||
# else
|
||
# ifdef HAVE_TIME_H
|
||
# include <time.h>
|
||
# endif
|
||
# endif
|
||
# endif
|
||
|
||
#ifdef GUILE_ISELECT
|
||
#include "iselect.h"
|
||
#endif
|
||
|
||
/* This file is included by threads.h, which, in turn, is included by
|
||
libguile.h while coop-threads.h only is included by
|
||
coop-threads.c. */
|
||
|
||
/* The coop_t struct must be declared here, since macros in this file
|
||
refer to the data member. */
|
||
|
||
/* The notion of a thread is merged with the notion of a queue.
|
||
Thread stuff: thread status (sp) and stuff to use during
|
||
(re)initialization. Queue stuff: next thread in the queue
|
||
(next). */
|
||
|
||
struct qt_t;
|
||
|
||
typedef struct coop_t {
|
||
struct qt_t *sp; /* QuickThreads handle. */
|
||
void *sto; /* `malloc'-allocated stack. */
|
||
|
||
struct coop_t *next; /* Next thread in the queue. */
|
||
|
||
struct coop_t *all_next;
|
||
struct coop_t *all_prev;
|
||
|
||
void *data; /* Thread local data */
|
||
|
||
void *base; /* Base of stack */
|
||
void *top; /* Top of stack */
|
||
|
||
void *joining; /* A queue of threads waiting to join this
|
||
thread */
|
||
|
||
#ifdef GUILE_ISELECT
|
||
int nfds;
|
||
SELECT_TYPE *readfds;
|
||
SELECT_TYPE *writefds;
|
||
SELECT_TYPE *exceptfds;
|
||
int timeoutp;
|
||
struct timeval wakeup_time; /* Time to stop sleeping */
|
||
int _errno;
|
||
int retval;
|
||
#else
|
||
time_t wakeup_time; /* Time to stop sleeping */
|
||
#endif
|
||
|
||
} coop_t;
|
||
|
||
extern coop_t *coop_global_curr; /* Currently-executing thread. */
|
||
|
||
extern void coop_yield (void);
|
||
|
||
extern size_t scm_switch_counter;
|
||
extern size_t scm_thread_count;
|
||
|
||
|
||
|
||
/* Cooperative threads don't need to have these defined */
|
||
|
||
#define SCM_THREAD_CRITICAL_SECTION_START
|
||
#define SCM_THREAD_CRITICAL_SECTION_END
|
||
|
||
|
||
|
||
#define SCM_NO_CRITICAL_SECTION_OWNER 0
|
||
#define SCM_THREAD_SWITCH_COUNT 50 /* was 10 /mdj */
|
||
|
||
|
||
|
||
#define SCM_THREAD_DEFER
|
||
#define SCM_THREAD_ALLOW
|
||
#define SCM_THREAD_REDEFER
|
||
#define SCM_THREAD_REALLOW_1
|
||
#define SCM_THREAD_REALLOW_2
|
||
|
||
#if 0
|
||
#define SCM_THREAD_SWITCHING_CODE \
|
||
{ \
|
||
if (scm_thread_count > 1) \
|
||
coop_yield(); \
|
||
} \
|
||
|
||
#else
|
||
#define SCM_THREAD_SWITCHING_CODE \
|
||
{ \
|
||
if (scm_thread_count > 1) \
|
||
{ \
|
||
scm_switch_counter--; \
|
||
if (scm_switch_counter == 0) \
|
||
{ \
|
||
scm_switch_counter = SCM_THREAD_SWITCH_COUNT; \
|
||
coop_yield(); \
|
||
} \
|
||
} \
|
||
} \
|
||
|
||
#endif
|
||
|
||
#define SCM_THREAD_LOCAL_DATA (coop_global_curr->data)
|
||
#define SCM_SET_THREAD_LOCAL_DATA(ptr) (coop_global_curr->data = (ptr))
|
||
|
||
#endif /* COOP_DEFSH */
|