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/*
* $Header$
*
* Copyright 2006 Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include "ccs_common.h"
struct ccs_lockref_d {
ccs_client_t client_owner;
ccs_lock_t lock;
};
struct ccs_lockref_d ccs_lockref_initializer = { NULL, NULL };
/* ------------------------------------------------------------------------ */
cc_int32 ccs_lockref_new (ccs_lockref_t *out_lockref,
ccs_client_t in_client_owner,
ccs_lock_t in_lock)
{
cc_int32 err = ccNoError;
ccs_lockref_t lockref = NULL;
if (!out_lockref ) { err = cci_check_error (ccErrBadParam); }
if (!in_client_owner) { err = cci_check_error (ccErrBadParam); }
if (!in_lock ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
lockref = malloc (sizeof (*lockref));
if (lockref) {
*lockref = ccs_lockref_initializer;
} else {
err = cci_check_error (ccErrNoMem);
}
}
if (!err) {
lockref->client_owner = in_client_owner;
lockref->lock = in_lock;
*out_lockref = lockref;
lockref = NULL;
}
ccs_lockref_release (lockref);
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_lockref_release (ccs_lockref_t io_lockref)
{
cc_int32 err = ccNoError;
if (!io_lockref) { err = cci_check_error (ccErrBadParam); }
if (!err) {
if (io_lockref->lock) {
ccs_lock_invalidate (io_lockref->lock);
}
free (io_lockref);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_lockref_invalidate (ccs_lockref_t io_lockref)
{
cc_int32 err = ccNoError;
if (!io_lockref) { err = cci_check_error (ccErrBadParam); }
if (!err) {
io_lockref->lock = NULL; /* so we don't loop */
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_lockref_is_for_lock (ccs_lockref_t in_lockref,
ccs_lock_t in_lock,
cc_uint32 *out_is_for_lock)
{
cc_int32 err = ccNoError;
if (!in_lockref ) { err = cci_check_error (ccErrBadParam); }
if (!in_lock ) { err = cci_check_error (ccErrBadParam); }
if (!out_is_for_lock) { err = cci_check_error (ccErrBadParam); }
if (!err) {
*out_is_for_lock = (in_lockref->lock == in_lock);
}
return cci_check_error (err);
}
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