sanei_thread.h

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/* sane - Scanner Access Now Easy.
   Copyright (C) 1998-2001 Yuri Dario
   Copyright (C) 2002-2003 Henning Meier-Geinitz (documentation)
   Copyright (C) 2003-2004 Gerhard Jaeger (pthread/process support)
   This file is part of the SANE package.
 
   SANE 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 of the License, or (at your
   option) any later version.
 
   SANE 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 sane; see the file COPYING.
   If not, see <https://www.gnu.org/licenses/>.
 
   As a special exception, the authors of SANE give permission for
   additional uses of the libraries contained in this release of SANE.
 
   The exception is that, if you link a SANE 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 SANE 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.
 
   If you submit changes to SANE to the maintainers to be included in
   a subsequent release, you agree by submitting the changes that
   those changes may be distributed with this exception intact.
 
   If you write modifications of your own for SANE, it is your choice
   whether to permit this exception to apply to your modifications.
   If you do not wish that, delete this exception notice.
 
*/
 
#ifndef sanei_thread_h
#define sanei_thread_h
#include "../include/sane/config.h"
 
#ifdef USE_PTHREAD
#include <pthread.h>
typedef pthread_t SANE_Pid;
#else
typedef int SANE_Pid;
#endif
 
extern void sanei_thread_init (void);
 
extern SANE_Bool sanei_thread_is_forked (void);
 
extern SANE_Bool sanei_thread_is_valid (SANE_Pid pid);
 
#define sanei_thread_invalidate(pid) ((pid) = (SANE_Pid)(-1))
 
#define sanei_thread_initialize sanei_thread_invalidate
 
extern SANE_Pid sanei_thread_begin (int (*func) (void *args), void *args);
 
extern int sanei_thread_kill (SANE_Pid pid);
 
extern int sanei_thread_sendsig (SANE_Pid pid, int sig);
 
extern SANE_Pid sanei_thread_waitpid (SANE_Pid pid, int *status);
 
extern SANE_Status sanei_thread_get_status (SANE_Pid pid);
 
#endif /* sanei_thread_h */