sectionlock.h

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/*
  sectionlock.h  -  mutex state handle

   Copyright (C)
     2008,            Christian Thaeter <ct@pipapo.org>

  **Lumiera** 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. See the file COPYING for further details.
*/


#ifndef LUMIERA_SECTIONLOCK_H
#define LUMIERA_SECTIONLOCK_H

#include <pthread.h>
#include <nobug.h>


typedef void
(*lumiera_sectionlock_unlock_fn)(void*, struct nobug_flag* flag,
                                 struct nobug_resource_user** handle,
                                 const struct nobug_context ctx);

struct lumiera_sectionlock_struct
{
  void* lock;
  lumiera_sectionlock_unlock_fn unlock;
  NOBUG_IF_ALPHA(struct nobug_flag* flag);
  RESOURCE_USER (rh);
};
typedef struct lumiera_sectionlock_struct lumiera_sectionlock;
typedef struct lumiera_sectionlock_struct* LumieraSectionlock;

/* helper function for nobug */
static inline void
lumiera_sectionlock_ensureunlocked (LumieraSectionlock self)
{
  ENSURE (!self->lock, "forgot to unlock");
}


#define LUMIERA_SECTION_UNLOCK_(section)                        \
  do if ((section)->lock)                                       \
    {                                                           \
      (section)->unlock((section)->lock, (section)->flag,       \
                        &(section)->rh, NOBUG_CONTEXT);         \
      (section)->lock = NULL;                                   \
    } while (0)


#endif
/*
// Local Variables:
// mode: C
// c-file-style: "gnu"
// indent-tabs-mode: nil
// End:
*/