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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2012-2012. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* 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.
*
* %CopyrightEnd%
*/
#ifndef __CODE_IX_H__
#define __CODE_IX_H__
#define ERTS_NUM_CODE_IX 3
typedef unsigned ErtsCodeIndex;
void erts_code_ix_init(void);
ErtsCodeIndex erts_active_code_ix(void);
ErtsCodeIndex erts_staging_code_ix(void);
/* Lock code_ix (enqueue and suspend until we get it)
*/
void erts_lock_code_ix(void);
/*SVERK
erts_lock_code_ix();
wait for thread progress
(we don't want any retarded threads with pointers to inactive Module)
Copy active -> loader
rlock old_code while copying Modules
Update loader
wait for thread progress
(we need a membarrier for everybody to "see" the new code)
Set loader as new active
erts_unlock_code_ix();
}*/
/* Unlock code_ix (resume first waiter)
*/
void erts_unlock_code_ix(void);
void erts_start_staging_code_ix(void);
void erts_commit_staging_code_ix(void);
void erts_abort_staging_code_ix(void);
void erts_rwlock_old_code(ErtsCodeIndex);
void erts_rwunlock_old_code(ErtsCodeIndex);
void erts_rlock_old_code(ErtsCodeIndex);
void erts_runlock_old_code(ErtsCodeIndex);
#ifdef ERTS_ENABLE_LOCK_CHECK
int erts_is_old_code_rlocked(ErtsCodeIndex);
int erts_is_code_ix_locked(void);
#endif
#endif /* !__CODE_IX_H__ */
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