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Marius Vollmer 2002-10-16 15:54:23 +00:00
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libguile/null-threads.h Normal file
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/* classes: h_files */
#ifndef SCM_NULL_DEFS_H
#define SCM_NULL_DEFS_H
/* Copyright (C) 2002 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. */
/* The null-threads implementation. We provide the standard API, but
no new threads can be created.
*/
#define SCM_CRITICAL_SECTION_START
#define SCM_CRITICAL_SECTION_END
#define SCM_THREAD_SWITCHING_CODE
typedef struct scm_null_mutex {
int locked;
} scm_null_mutex;
SCM_API int scm_null_mutex_init (scm_null_mutex *);
SCM_API int scm_null_mutex_lock (scm_null_mutex *);
SCM_API int scm_null_mutex_unlock (scm_null_mutex *);
SCM_API int scm_null_mutex_destroy (scm_null_mutex *);
typedef scm_null_mutex scm_t_mutex;
#define scm_mutex_init scm_null_mutex_init
#define scm_mutex_lock scm_null_mutex_lock
#define scm_mutex_unlock scm_null_mutex_unlock
typedef struct scm_null_condvar {
int signalled;
} scm_null_condvar;
SCM_API int scm_null_condvar_init (scm_null_condvar *);
SCM_API int scm_null_condvar_wait (scm_null_condvar *, scm_null_mutex *);
SCM_API int scm_null_condvar_signal (scm_null_condvar *);
SCM_API int scm_null_condvar_destroy (scm_null_condvar *);
typedef scm_null_condvar scm_t_condvar;
#define scm_cond_init scm_null_condvar_init
#define scm_cond_wait scm_null_condvar_wait
#define scm_cond_signal scm_null_condvar_signal
#define scm_cond_broadcast scm_null_condvar_signal /* yes */
#define scm_cond_destroy scm_null_condvar_destroy
SCM_API void *scm_null_threads_data;
#define SCM_THREAD_LOCAL_DATA (scm_null_threads_data)
#define SCM_SET_THREAD_LOCAL_DATA(ptr) (scm_null_threads_data = (ptr))
#endif /* SCM_NULL_DEFS_H */
/*
Local Variables:
c-file-style: "gnu"
End:
*/