The main author of Bacula is Kern Sibbald, with contributions from
many others, a complete list can be found in the file AUTHORS.
This program is Free Software; you can redistribute it and/or
- modify it under the terms of version two of the GNU General Public
+ modify it under the terms of version three of the GNU Affero General Public
License as published by the Free Software Foundation and included
in the file LICENSE.
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
#ifndef __DEVLOCK_H
#define __DEVLOCK_H 1
+struct take_lock_t {
+ pthread_t writer_id; /* id of writer */
+ int reason; /* save reason */
+ int prev_reason; /* previous reason */
+};
+
+
class devlock {
private:
pthread_mutex_t mutex;
int r_wait; /* readers waiting */
int w_wait; /* writers waiting */
int reason; /* reason for lock */
- bool can_steal; /* can the lock be stolen? */
+ int prev_reason; /* previous reason */
+ bool can_take; /* can the lock be taken? */
public:
- devlock(int reason, bool can_steal=false);
+ devlock(int reason, bool can_take=false);
~devlock();
int init(int priority);
int destroy();
+ int take_lock(take_lock_t *hold, int reason);
+ int return_lock(take_lock_t *hold);
+ void new_reason(int nreason) { prev_reason = reason; reason = nreason; };
+ void restore_reason() { reason = prev_reason; prev_reason = 0; };
- int writelock(int reason, bool can_steal=false);
+ int writelock(int reason, bool can_take=false);
int writetrylock();
int writeunlock();
void write_release();