/******************************************************************************
 *
 *   Copyright © International Business Machines  Corp., 2009
 *
 *   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 of the License, or
 *   (at your option) any later version.
 *
 * DESCRIPTION
 *      GCC atomic builtin wrappers
 *      http://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/Atomic-Builtins.html
 *
 * AUTHOR
 *      Darren Hart <dvhart@linux.intel.com>
 *
 * HISTORY
 *      2009-Nov-17: Initial version by Darren Hart <dvhart@linux.intel.com>
 *
 *****************************************************************************/

#ifndef _ATOMIC_H
#define _ATOMIC_H

typedef struct {
	volatile int val;
} atomic_t;

#define ATOMIC_INITIALIZER { 0 }

/**
 * atomic_cmpxchg() - Atomic compare and exchange
 * @uaddr:	The address of the futex to be modified
 * @oldval:	The expected value of the futex
 * @newval:	The new value to try and assign the futex
 *
 * Return the old value of addr->val.
 */
static inline int
atomic_cmpxchg(atomic_t *addr, int oldval, int newval)
{
	return __sync_val_compare_and_swap(&addr->val, oldval, newval);
}

/**
 * atomic_inc() - Atomic incrememnt
 * @addr:	Address of the variable to increment
 *
 * Return the new value of addr->val.
 */
static inline int
atomic_inc(atomic_t *addr)
{
	return __sync_add_and_fetch(&addr->val, 1);
}

/**
 * atomic_dec() - Atomic decrement
 * @addr:	Address of the variable to decrement
 *
 * Return the new value of addr-val.
 */
static inline int
atomic_dec(atomic_t *addr)
{
	return __sync_sub_and_fetch(&addr->val, 1);
}

/**
 * atomic_set() - Atomic set
 * @addr:	Address of the variable to set
 * @newval:	New value for the atomic_t
 *
 * Return the new value of addr->val.
 */
static inline int
atomic_set(atomic_t *addr, int newval)
{
	addr->val = newval;
	return newval;
}

#endif
.cgi/linux/net-next.git/commit/sound/soc/codecs/adau1761-spi.c?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/codecs/adau1761-spi.c?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/adau1761-spi.c'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='e2e004acc7cbe3c531e752a270a74e95cde3ea48'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>codecs</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/adau1761-spi.c?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>adau1761-spi.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/adau1761-spi.c?h=nds-private-remove&amp;id=e2e004acc7cbe3c531e752a270a74e95cde3ea48&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>