diff options
Diffstat (limited to 'libguile/coop-defs.h')
-rw-r--r-- | libguile/coop-defs.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/libguile/coop-defs.h b/libguile/coop-defs.h new file mode 100644 index 000000000..d9a6b9eec --- /dev/null +++ b/libguile/coop-defs.h @@ -0,0 +1,149 @@ +/* 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, 675 Mass Ave, Cambridge, MA 02139, 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 + +/* 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 */ + + time_t wakeup_time; /* Time to stop sleeping */ + +} 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 */ |