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
- License as published by the Free Software Foundation plus additions
- that are listed in the file LICENSE.
+ License as published by the Free Software Foundation and included
+ in the file LICENSE.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
* Obviously, no zzz_dev() is allowed to call
* a www_device() or everything falls apart.
*
- * Concerning the routines lock_device() and block_device()
+ * Concerning the routines dev->r_lock()() and block_device()
* see the end of this module for details. In general,
* blocking a device leaves it in a state where all threads
* other than the current thread block when they attempt to
block_device(dev, BST_DOING_ACQUIRE);
/* Unlock, but leave BLOCKED */
- unlock_device(dev);
+ dev->dunlock();
bstrncpy(PrevVolName, dev->VolCatInfo.VolCatName, sizeof(PrevVolName));
bstrncpy(dev->VolHdr.PrevVolumeName, PrevVolName, sizeof(dev->VolHdr.PrevVolumeName));
if (!mount_next_write_volume(dcr, 1)) {
free_block(label_blk);
dcr->block = block;
- dev->lock();
+ dev->dlock();
unblock_device(dev);
return false; /* device locked */
}
- dev->lock(); /* lock again */
+ dev->dlock(); /* lock again */
dev->VolCatInfo.VolCatJobs++; /* increment number of jobs on vol */
dir_update_volume_info(dcr, false); /* send Volume info to Director */
if (!write_block_to_dev(dcr)) {
berrno be;
Pmsg1(0, _("write_block_to_device Volume label failed. ERR=%s"),
- be.strerror(dev->dev_errno));
+ be.bstrerror(dev->dev_errno));
free_block(label_blk);
dcr->block = block;
unblock_device(dev);
if (!write_block_to_dev(dcr)) {
berrno be;
Pmsg1(0, _("write_block_to_device overflow block failed. ERR=%s"),
- be.strerror(dev->dev_errno));
+ be.bstrerror(dev->dev_errno));
unblock_device(dev);
return false; /* device locked */
}
return false;
}
- lock_device(dev);
+ dev->r_dlock();
/* Defer opening files */
if (!dev->is_tape()) {
Dmsg1(129, "open dev %s OK\n", dev->print_name());
bail_out:
- unlock_device(dev);
+ dev->dunlock();
return ok;
}
}
return true;
}
-
-
-
-#ifdef xxx
-void dev_lock(DEVICE *dev)
-{
- int errstat;
- if ((errstat=rwl_writelock(&dev->lock))) {
- Emsg1(M_ABORT, 0, _("Device write lock failure. ERR=%s\n"), strerror(errstat));
- }
-}
-
-void dev_unlock(DEVICE *dev)
-{
- int errstat;
- if ((errstat=rwl_writeunlock(&dev->lock))) {
- Emsg1(M_ABORT, 0, _("Device write unlock failure. ERR=%s\n"), strerror(errstat));
- }
-}
-#endif
-
-/*
- * When dev_blocked is set, all threads EXCEPT thread with id no_wait_id
- * must wait. The no_wait_id thread is out obtaining a new volume
- * and preparing the label.
- */
-void _lock_device(const char *file, int line, DEVICE *dev)
-{
- int stat;
- Dmsg3(500, "lock %d from %s:%d\n", dev->blocked(), file, line);
- dev->lock();
- if (dev->blocked() && !pthread_equal(dev->no_wait_id, pthread_self())) {
- dev->num_waiting++; /* indicate that I am waiting */
- while (dev->blocked()) {
- if ((stat = pthread_cond_wait(&dev->wait, &dev->m_mutex)) != 0) {
- dev->unlock();
- Emsg1(M_ABORT, 0, _("pthread_cond_wait failure. ERR=%s\n"),
- strerror(stat));
- }
- }
- dev->num_waiting--; /* no longer waiting */
- }
-}
-
-/*
- * Check if the device is blocked or not
- */
-bool is_device_unmounted(DEVICE *dev)
-{
- bool stat;
- int blocked = dev->blocked();
- stat = (blocked == BST_UNMOUNTED) ||
- (blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP);
- return stat;
-}
-
-void _unlock_device(const char *file, int line, DEVICE *dev)
-{
- Dmsg2(500, "unlock from %s:%d\n", file, line);
- dev->unlock();
-}
-
-/*
- * Block all other threads from using the device
- * Device must already be locked. After this call,
- * the device is blocked to any thread calling lock_device(),
- * but the device is not locked (i.e. no P on device). Also,
- * the current thread can do slip through the lock_device()
- * calls without blocking.
- */
-void _block_device(const char *file, int line, DEVICE *dev, int state)
-{
- Dmsg3(500, "block set %d from %s:%d\n", state, file, line);
- ASSERT(dev->blocked() == BST_NOT_BLOCKED);
- dev->set_blocked(state); /* make other threads wait */
- dev->no_wait_id = pthread_self(); /* allow us to continue */
-}
-
-/*
- * Unblock the device, and wake up anyone who went to sleep.
- */
-void _unblock_device(const char *file, int line, DEVICE *dev)
-{
- Dmsg3(500, "unblock %s from %s:%d\n", dev->print_blocked(), file, line);
- ASSERT(dev->blocked());
- dev->set_blocked(BST_NOT_BLOCKED);
- dev->no_wait_id = 0;
- if (dev->num_waiting > 0) {
- pthread_cond_broadcast(&dev->wait); /* wake them up */
- }
-}
-
-/*
- * Enter with device locked and blocked
- * Exit with device unlocked and blocked by us.
- */
-void _steal_device_lock(const char *file, int line, DEVICE *dev, bsteal_lock_t *hold, int state)
-{
-
- Dmsg3(400, "steal lock. old=%s from %s:%d\n", dev->print_blocked(),
- file, line);
- hold->dev_blocked = dev->blocked();
- hold->dev_prev_blocked = dev->dev_prev_blocked;
- hold->no_wait_id = dev->no_wait_id;
- dev->set_blocked(state);
- Dmsg1(400, "steal lock. new=%s\n", dev->print_blocked());
- dev->no_wait_id = pthread_self();
- dev->unlock();
-}
-
-/*
- * Enter with device blocked by us but not locked
- * Exit with device locked, and blocked by previous owner
- */
-void _give_back_device_lock(const char *file, int line, DEVICE *dev, bsteal_lock_t *hold)
-{
- Dmsg3(400, "return lock. old=%s from %s:%d\n",
- dev->print_blocked(), file, line);
- dev->lock();
- dev->set_blocked(hold->dev_blocked);
- dev->dev_prev_blocked = hold->dev_prev_blocked;
- dev->no_wait_id = hold->no_wait_id;
- Dmsg1(400, "return lock. new=%s\n", dev->print_blocked());
- if (dev->num_waiting > 0) {
- pthread_cond_broadcast(&dev->wait); /* wake them up */
- }
-}
projects / bacula / bacula / blobdiff