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/* WebDAV Class 2 locking operations Copyright © 1999-2006, Joe Orton joe@manyfish.co.uk

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details.

You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA


ifndef NE_LOCKS_H

define NE_LOCKS_H

include “ne_request.h” / for ne_session + ne_request /

include “ne_uri.h” / for ne_uri /


/ The scope of a lock / enum ne_lock_scope { ne_lockscope_exclusive, ne_lockscope_shared };

/ Lock type. Only write locks are defined in RFC2518. / enum ne_lock_type { ne_locktype_write };

/ A lock object. / struct ne_lock { ne_uri uri; int depth; / the depth of the lock (NE_DEPTH_). / enum ne_lock_type type; enum ne_lock_scope scope; char token; / the lock token: uniquely identifies this lock. / char owner; / string describing the owner of the lock. / long timeout; / timeout in seconds. (or NE_TIMEOUT_) / }; / NB: struct ne_lock Would be typedef'ed to ne_lock except lock is * a verb and a noun, so we already have ne_lock the function. Damn * the English language. /



/ Create a depth zero, exclusive write lock, with default timeout * (allowing a server to pick a default). token, owner and uri are * unset. / struct ne_lock *ne_lock_create(void);

/ HINT: to initialize uri host/port/scheme for the lock’s URI, use * ne_fill_server_uri from ne_session.h. /

/ Deep-copy a lock structure: strdup’s any of path, token, owner, * hostport which are set. / struct ne_lock ne_lock_copy(const struct ne_lock lock);

/ Free a lock structure; free’s any of any of the URI, token and * owner which are set, but not the lock object itself. / void ne_lock_free(struct ne_lock *lock);

/ Like ne_lock_free; but free’s the lock object itself too. / void ne_lock_destroy(struct ne_lock *lock);

/ ne_lock_store: an opaque type which is used to store a set of lock * objects. / typedef struct ne_lock_store_s ne_lock_store;

/ Create a lock store. / ne_lock_store *ne_lockstore_create(void);

/ Register the lock store ‘store’ with the HTTP session ‘sess’: any * operations made using ‘sess’ which operate on a locked resource, * can use the locks from ‘store’ if needed. / void ne_lockstore_register(ne_lock_store store, ne_session sess);

/ Destroy a lock store, free'ing any locks remaining inside. / void ne_lockstore_destroy(ne_lock_store *store);

/ Add a lock to the store: the store then “owns” the lock object, and * you must not free it. The lock MUST have all of: * - a completed URI structure: scheme, host, port, and path all set * - a valid lock token * - a valid depth / void ne_lockstore_add(ne_lock_store store, struct ne_lock lock);

/ Remove given lock object from store: ‘lock’ MUST point to a lock * object which is known to be in the store. / void ne_lockstore_remove(ne_lock_store store, struct ne_lock lock);

/ Returns the first lock in the lock store, or NULL if the store is * empty. / struct ne_lock ne_lockstore_first(ne_lock_store store);

/ After ne_lockstore_first has been called; returns the next lock in * the lock store, or NULL if there are no more locks stored. * Behaviour is undefined if ne_lockstore_first has not been called on * ‘store’ since the store was created, or the last time this function * returned NULL for the store.. / struct ne_lock ne_lockstore_next(ne_lock_store store);

/ Find a lock in the store for the given server, and with the given * path. / struct ne_lock ne_lockstore_findbyuri(ne_lock_store store, const ne_uri *uri);

/ Issue a LOCK request for the given lock. Requires that the uri, * depth, type, scope, and timeout members of ‘lock’ are filled in. * owner and token must be malloc-allocated if not NULL; and may be * free()d by this function. On successful return, lock->token will * contain the lock token. / int ne_lock(ne_session sess, struct ne_lock lock);

/ Issue an UNLOCK request for the given lock / int ne_unlock(ne_session sess, const struct ne_lock lock);

/ Refresh a lock. Updates lock->timeout appropriately. / int ne_lock_refresh(ne_session sess, struct ne_lock lock);

/ Callback for lock discovery. If ‘lock’ is NULL, something went * wrong performing lockdiscovery for the resource, look at ‘status’ * for the details. * * If lock is non-NULL, at least lock->uri and lock->token will be * filled in; and status will be NULL. / typedef void (ne_lock_result)(void userdata, const struct ne_lock lock, const ne_uri uri, const ne_status *status);

/ Perform lock discovery on the given path. ‘result’ is called with * the results (possibly >1 times). / int ne_lock_discover(ne_session sess, const char path, ne_lock_result result, void *userdata);

/ The ne_lock_using_ functions should be used before dispatching a * request which modify resources. If a lock store has been * registered with the session associated with the request, and locks * are present in the lock store which cover the resources which are * being modified by the request, then the appropriate lock tokens are * submitted in the request headers. */

/ Indicate that request ‘req’ will modify the resource at ‘path’, and * is an operation of given ‘depth’. / void ne_lock_using_resource(ne_request req, const char path, int depth);

/ Indicate that request ‘req’ will modify the parent collection of * the resource found at ‘path’ (for instance when removing the * resource from the collection). / void ne_lock_using_parent(ne_request req, const char path);


endif / NE_LOCKS_H /