X-Git-Url: http://git.hcoop.net/bpt/guile.git/blobdiff_plain/8ef70d1e3ceb6e6303b28141e000eb8603b38d22..1d314ec23bbe4ee3d38f05758996d88a5cacbf37:/libguile/null-threads.h diff --git a/libguile/null-threads.h b/libguile/null-threads.h dissimilarity index 93% index ea13873f7..c4808e082 100644 --- a/libguile/null-threads.h +++ b/libguile/null-threads.h @@ -1,98 +1,107 @@ -/* 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_cond; -#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: -*/ +/* classes: h_files */ + +#ifndef SCM_NULL_THREADS_H +#define SCM_NULL_THREADS_H + +/* Copyright (C) 2005 Free Software Foundation, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + + + +/* The null-threads implementation. We provide the subset of the + standard pthread API that is used by Guile, but no new threads can + be created. + + This file merely exits so that Guile can be compiled and run + without using pthreads. Improving performance via optimizations + that are possible in a single-threaded program is not a primary + goal. +*/ + +#include + +/* Threads +*/ +#define scm_i_pthread_t int +#define scm_i_pthread_self() 0 +#define scm_i_pthread_create(t,a,f,d) (*(t)=0, (void)(f), ENOSYS) +#define scm_i_pthread_detach(t) do { } while (0) +#define scm_i_pthread_exit(v) exit(0) +#define scm_i_sched_yield() 0 + +/* Signals + */ +#define scm_i_pthread_sigmask sigprocmask + +/* Mutexes + */ +#define SCM_I_PTHREAD_MUTEX_INITIALIZER 0 +#define scm_i_pthread_mutex_t int +#define scm_i_pthread_mutex_init(m,a) (*(m) = 0) +#define scm_i_pthread_mutex_destroy(m) do { (void)(m); } while(0) +#define scm_i_pthread_mutex_trylock(m) ((*(m))++) +#define scm_i_pthread_mutex_lock(m) ((*(m))++) +#define scm_i_pthread_mutex_unlock(m) ((*(m))--) +#define scm_i_pthread_mutexattr_recursive 0 + +/* Condition variables + */ +#define SCM_I_PTHREAD_COND_INITIALIZER 0 +#define scm_i_pthread_cond_t int +#define scm_i_pthread_cond_init(c,a) (*(c) = 0) +#define scm_i_pthread_cond_destroy(c) do { (void)(c); } while(0) +#define scm_i_pthread_cond_signal(c) (*(c) = 1) +#define scm_i_pthread_cond_broadcast(c) (*(c) = 1) +#define scm_i_pthread_cond_wait(c,m) (abort(), 0) +#define scm_i_pthread_cond_timedwait(c,m,t) (abort(), 0) + +/* Onces + */ +#define scm_i_pthread_once_t int +#define SCM_I_PTHREAD_ONCE_INIT 0 +#define scm_i_pthread_once(o,f) do { \ + if(!*(o)) { *(o)=1; f (); } \ + } while(0) + +/* Thread specific storage + */ +typedef struct scm_i_pthread_key_t { + struct scm_i_pthread_key_t *next; + void *value; + void (*destr_func) (void *); +} scm_i_pthread_key_t; + +SCM_API int scm_i_pthread_key_create (scm_i_pthread_key_t *key, + void (*destr_func) (void *)); +#define scm_i_pthread_setspecific(k,p) ((k).value = (p)) +#define scm_i_pthread_getspecific(k) ((k).value) + +/* Convenience functions + */ +#define scm_i_scm_pthread_mutex_lock scm_i_pthread_mutex_lock +#define scm_i_dynwind_pthread_mutex_lock scm_i_pthread_mutex_lock +#define scm_i_scm_pthread_cond_wait scm_i_pthread_cond_wait +#define scm_i_scm_pthread_cond_timedwait scm_i_pthread_cond_timedwait + + +#endif /* SCM_NULL_THREADS_H */ + +/* + Local Variables: + c-file-style: "gnu" + End: +*/