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/* PROLOG END TAG zYx                                              */
#ifndef _SPU_WRITE_TRYLOCK_H_
#define _SPU_WRITE_TRYLOCK_H_

#include "sync_utils.h"
#include "mutex.h"

/**
 * write_trylock - acquire a writer lock, or return immediately.
 * @ea: handle to effective address of lock variable.
 *
 * Try to acquire an exclusive writer lock, or return
 * immediately.  The only restriction here is that @ea
 * must be word aligned.
 *
 * Returns 1 on success, or 0 on failure.
 *
 * Caution:
 * The application should not call this interface from a tight
 * loop!!  Use write_lock() instead.
 */
static __inline int _write_trylock(eaddr_t ea)
{
    DECL_MUTEX_VARS();
    s32 status, ret_val;

    RAW_TEST_AND_SET(==, -1);

    return ret_val;
}


#endif /* _SPU_WRITE_TRYLOCK_H_ */