critsec.h

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/*
 *  The contents of this file are subject to the Mozilla Public License
 *  Version 1.0 (the "License"); you may not use this file except in
 *  compliance with the License. You may obtain a copy of the License
 *  at http://www.mozilla.org/MPL/
 *
 *  Software distributed under the License is distributed on an "AS IS"
 *  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 *  the License for the specific language governing rights and
 *  limitations under the License.
 *
 *  The Original Code is legOS code, released October 17, 1999.
 *
 *  The Initial Developer of the Original Code is Markus L. Noga.
 *  Portions created by Markus L. Noga are Copyright (C) 1999
 *  Markus L. Noga. All Rights Reserved.
 *
 *  Contributor(s): Joseph A. Woolley <jawoolley@users.sourceforge.net>
 */

#if !defined(__critsec_h__)
#define __critsec_h__

#if defined(__cplusplus)
extern "C" {
#endif // __cplusplus

#include <config.h>

#if defined(CONF_TM) && defined(CONF_CRITICAL_SECTIONS)
#include <sys/tm.h>
#include <atomic.h>

#ifndef DOXYGEN_SHOULD_SKIP_INTERNALS


struct critsec {
  atomic_t count;
  tdata_t* task;
};
#endif //  DOXYGEN_SHOULD_SKIP_INTERNALS

typedef struct critsec critsec_t;


#define locked_decrement(counter) atomic_dec(counter)


extern wakeup_t wait_critical_section(wakeup_t data);


#define initialize_critical_section(cs) (cs)->count=0


extern int enter_critical_section(critsec_t* cs);


#define leave_critical_section(cs) atomic_dec(&(cs)->count)


#define destroy_critical_section(cs)

#endif // CONF_TM && CONF_CRITICAL_SECTIONS

#if defined(__cplusplus)
}
#endif // __cplusplus

#endif // __critsec_h__

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