A streamlined version (for embedded use) of Jeff Brown's ZBar library. Visit <http://zbar.sourceforge.net> for more details.
Dependents: BarcodeReader_F103
refcnt.h
- Committer:
- hudakz
- Date:
- 2020-01-10
- Revision:
- 0:e33621169e44
File content as of revision 0:e33621169e44:
/*------------------------------------------------------------------------ * Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net> * * This file is part of the ZBar Bar Code Reader. * * The ZBar Bar Code Reader is free software; you can redistribute it * and/or modify it under the terms of the GNU Lesser Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * The ZBar Bar Code Reader 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 Public License for more details. * * You should have received a copy of the GNU Lesser Public License * along with the ZBar Bar Code Reader; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301 USA * * http://sourceforge.net/projects/zbar *------------------------------------------------------------------------*/ #ifndef _REFCNT_H_ #define _REFCNT_H_ #include <config.h> #include <assert.h> #if defined(_WIN32) # include <windows.h> typedef volatile LONG refcnt_t; /* FIXME where did volatile come from? */ static inline int _zbar_refcnt (refcnt_t *cnt, int delta) { int rc = -1; if(delta > 0) while(delta--) rc = InterlockedIncrement(cnt); else if(delta < 0) while(delta++) rc = InterlockedDecrement(cnt); assert(rc >= 0); return(rc); } #elif defined(HAVE_LIBPTHREAD) # include <pthread.h> typedef int refcnt_t; extern pthread_mutex_t _zbar_reflock; static inline int _zbar_refcnt (refcnt_t *cnt, int delta) { pthread_mutex_lock(&_zbar_reflock); int rc = (*cnt += delta); pthread_mutex_unlock(&_zbar_reflock); assert(rc >= 0); return(rc); } #else typedef int refcnt_t; static inline int _zbar_refcnt (refcnt_t *cnt, int delta) { int rc = (*cnt += delta); assert(rc >= 0); return(rc); } #endif void _zbar_refcnt_init(void); #endif