diff options
Diffstat (limited to 'camel/camel-session.c')
| -rw-r--r-- | camel/camel-session.c | 764 |
1 files changed, 0 insertions, 764 deletions
diff --git a/camel/camel-session.c b/camel/camel-session.c deleted file mode 100644 index 8f97c507b9..0000000000 --- a/camel/camel-session.c +++ /dev/null @@ -1,764 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* camel-session.c : Abstract class for an email session */ - -/* - * - * Author: - * Bertrand Guiheneuf <bertrand@helixcode.com> - * Dan Winship <danw@helixcode.com> - * Jeffrey Stedfast <fejj@helixcode.com> - * - * Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - * USA - */ - -#include <config.h> -#include <errno.h> -#include <stdio.h> -#include <string.h> -#include <sys/stat.h> -#include <unistd.h> -#include <gal/util/e-util.h> -#include "camel-session.h" -#include "camel-store.h" -#include "camel-transport.h" -#include "camel-exception.h" -#include "string-utils.h" -#include "camel-url.h" -#include "hash-table-utils.h" - -#include "camel-private.h" - -#define d(x) - -static CamelObjectClass *parent_class; - -static void -camel_session_init (CamelSession *session) -{ - session->modules = camel_provider_init (); - session->providers = g_hash_table_new (g_strcase_hash, g_strcase_equal); - session->priv = g_malloc0(sizeof(*session->priv)); -#ifdef ENABLE_THREADS - session->priv->lock = g_mutex_new(); -#endif -} - -static gboolean -camel_session_destroy_provider (gpointer key, gpointer value, gpointer user_data) -{ - CamelProvider *prov = (CamelProvider *)value; - - g_hash_table_destroy (prov->service_cache); - - return TRUE; -} - -static void -camel_session_finalise (CamelObject *o) -{ - CamelSession *session = (CamelSession *)o; - - g_free(session->storage_path); - g_hash_table_foreach_remove (session->providers, - camel_session_destroy_provider, NULL); - g_hash_table_destroy (session->providers); - -#ifdef ENABLE_THREADS - g_mutex_free(session->priv->lock); -#endif - - g_free(session->priv); -} - -static void -camel_session_class_init (CamelSessionClass *camel_session_class) -{ - parent_class = camel_type_get_global_classfuncs (camel_object_get_type ()); -} - -CamelType -camel_session_get_type (void) -{ - static CamelType camel_session_type = CAMEL_INVALID_TYPE; - - if (camel_session_type == CAMEL_INVALID_TYPE) { - camel_session_type = camel_type_register (camel_object_get_type (), "CamelSession", - sizeof (CamelSession), - sizeof (CamelSessionClass), - (CamelObjectClassInitFunc) camel_session_class_init, - NULL, - (CamelObjectInitFunc) camel_session_init, - (CamelObjectFinalizeFunc) camel_session_finalise); - } - - return camel_session_type; -} - -/** - * camel_session_new: - * @storage_path: Path to a directory Camel can use for persistent storage. - * (This directory must already exist.) - * @authenticator: A callback for discussing authentication information - * @registrar: A callback for registering timeout callbacks - * @remove: A callback for removing timeout callbacks - * - * This creates a new CamelSession object, which represents global state - * for the Camel library, and contains callbacks that can be used to - * interact with the main application. - * - * Return value: the new CamelSession - **/ -CamelSession * -camel_session_new (const char *storage_path, - CamelAuthCallback authenticator, - CamelTimeoutRegisterCallback registrar, - CamelTimeoutRemoveCallback remover) -{ - CamelSession *session = CAMEL_SESSION (camel_object_new (CAMEL_SESSION_TYPE)); - - session->storage_path = g_strdup (storage_path); - session->authenticator = authenticator; - session->registrar = registrar; - session->remover = remover; - return session; -} - -/** - * camel_session_register_provider: - * @session: a session object - * @protocol: the protocol the provider provides for - * @provider: provider object - * - * Registers a protocol to provider mapping for the session. - * - * Assumes the session lock has already been obtained, - * which is the case for automatically loaded provider modules. - **/ -void -camel_session_register_provider (CamelSession *session, - CamelProvider *provider) -{ - g_return_if_fail (CAMEL_IS_SESSION (session)); - g_return_if_fail (provider != NULL); - - g_hash_table_insert (session->providers, provider->protocol, provider); -} - -static void -ensure_loaded (gpointer key, gpointer value, gpointer user_data) -{ - CamelSession *session = user_data; - char *name = key; - char *path = value; - - if (!g_hash_table_lookup (session->providers, name)) { - CamelException ex; - - camel_exception_init (&ex); - camel_provider_load (session, path, &ex); - camel_exception_clear (&ex); - } -} - -static gint -provider_compare (gconstpointer a, gconstpointer b) -{ - const CamelProvider *cpa = (const CamelProvider *)a; - const CamelProvider *cpb = (const CamelProvider *)b; - - return strcmp (cpa->name, cpb->name); -} - -static void -add_to_list (gpointer key, gpointer value, gpointer user_data) -{ - GList **list = user_data; - CamelProvider *prov = value; - - *list = g_list_insert_sorted (*list, prov, provider_compare); -} - -/** - * camel_session_list_providers: - * @session: the session - * @load: whether or not to load in providers that are not already loaded - * - * This returns a list of available providers in this session. If @load - * is %TRUE, it will first load in all available providers that haven't - * yet been loaded. - * - * Return value: a GList of providers, which the caller must free. - **/ -GList * -camel_session_list_providers (CamelSession *session, gboolean load) -{ - GList *list; - - g_return_val_if_fail (CAMEL_IS_SESSION (session), NULL); - - CAMEL_SESSION_LOCK(session, lock); - - if (load) - g_hash_table_foreach (session->modules, ensure_loaded, session); - - list = NULL; - g_hash_table_foreach (session->providers, add_to_list, &list); - - CAMEL_SESSION_UNLOCK(session, lock); - - return list; -} - -static void -service_cache_remove (CamelService *service, gpointer event_data, gpointer user_data) -{ - CamelProvider *provider; - CamelSession *session = CAMEL_SESSION (user_data); - - g_return_if_fail (CAMEL_IS_SESSION (session)); - g_return_if_fail (service != NULL); - g_return_if_fail (service->url != NULL); - - CAMEL_SESSION_LOCK(session, lock); - - provider = g_hash_table_lookup (session->providers, service->url->protocol); - g_hash_table_remove (provider->service_cache, service->url); - - CAMEL_SESSION_UNLOCK(session, lock); -} - -/** - * camel_session_get_service: - * @session: the CamelSession - * @url_string: a Camel URL describing the service to get - * @type: the provider type (%CAMEL_PROVIDER_STORE or - * %CAMEL_PROVIDER_TRANSPORT) to get, since some URLs may be able - * to specify either type. - * @ex: a CamelException - * - * This resolves a CamelURL into a CamelService, including loading the - * provider library for that service if it has not already been loaded. - * - * Services are cached, and asking for "the same" @url_string multiple - * times will return the same CamelService (with its reference count - * incremented by one each time). What constitutes "the same" URL - * depends in part on the provider. - * - * Return value: the requested CamelService, or %NULL - **/ -CamelService * -camel_session_get_service (CamelSession *session, const char *url_string, - CamelProviderType type, CamelException *ex) -{ - CamelURL *url; - CamelProvider *provider; - CamelService *service; - - url = camel_url_new (url_string, ex); - if (!url) - return NULL; - - /* We need to look up the provider so we can then lookup - the service in the provider's cache */ - CAMEL_SESSION_LOCK(session, lock); - provider = g_hash_table_lookup (session->providers, url->protocol); - if (!provider) { - /* See if there's one we can load. */ - char *path; - - path = g_hash_table_lookup (session->modules, url->protocol); - if (path) { - camel_provider_load (session, path, ex); - if (camel_exception_get_id (ex) != - CAMEL_EXCEPTION_NONE) { - camel_url_free (url); - CAMEL_SESSION_UNLOCK(session, lock); - return NULL; - } - } - provider = g_hash_table_lookup (session->providers, url->protocol); - } - - if (!provider || !provider->object_types[type]) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_URL_INVALID, - _("No provider available for protocol `%s'"), - url->protocol); - camel_url_free (url); - CAMEL_SESSION_UNLOCK(session, lock); - return NULL; - } - - /* Now look up the service in the provider's cache */ - service = g_hash_table_lookup (provider->service_cache, url); - if (service != NULL) { - camel_url_free (url); - camel_object_ref (CAMEL_OBJECT (service)); - CAMEL_SESSION_UNLOCK(session, lock); - return service; - } - - service = camel_service_new (provider->object_types[type], session, provider, url, ex); - if (service) { - g_hash_table_insert (provider->service_cache, url, service); - camel_object_hook_event (CAMEL_OBJECT (service), "finalize", (CamelObjectEventHookFunc) service_cache_remove, session); - } - CAMEL_SESSION_UNLOCK(session, lock); - - return service; -} - -/** - * camel_session_get_service_connected: - * @session: the CamelSession - * @url_string: a Camel URL describing the service to get - * @type: the provider type - * @ex: a CamelException - * - * This works like camel_session_get_service(), but also ensures that - * the returned service will have been successfully connected (via - * camel_service_connect().) - * - * Return value: the requested CamelService, or %NULL - **/ -CamelService * -camel_session_get_service_connected (CamelSession *session, - const char *url_string, - CamelProviderType type, - CamelException *ex) -{ - CamelService *svc; - - svc = camel_session_get_service (session, url_string, type, ex); - if (svc == NULL) - return NULL; - - if (svc->connected == FALSE) { - if (camel_service_connect (svc, ex) == FALSE) { - camel_object_unref (CAMEL_OBJECT (svc)); - return NULL; - } - } - - return svc; -} - -/** - * camel_session_get_storage_path: - * @session: session object - * @service: a CamelService - * @ex: a CamelException - * - * This returns the path to a directory which the service can use for - * its own purposes. Data stored there will remain between Evolution - * sessions. No code outside of that service should ever touch the - * files in this directory. If the directory does not exist, it will - * be created. - * - * Return value: the path (which the caller must free), or %NULL if - * an error occurs. - **/ -char * -camel_session_get_storage_path (CamelSession *session, CamelService *service, - CamelException *ex) -{ - char *path, *p; - - p = camel_service_get_path (service); - path = g_strdup_printf ("%s/%s", session->storage_path, p); - g_free (p); - - if (access (path, F_OK) == 0) - return path; - - if (e_mkdir_hier (path, S_IRWXU) == -1) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, - _("Could not create directory %s:\n%s"), - path, g_strerror (errno)); - g_free (path); - return NULL; - } - - return path; -} - -/** - * camel_session_query_authenticator: query the session authenticator - * @session: session object - * @mode: %CAMEL_AUTHENTICATOR_ASK or %CAMEL_AUTHENTICATOR_TELL - * @data: prompt to query user with, or data to cache - * @secret: whether or not the data is secret (eg, a password) - * @service: the service this query is being made by - * @item: an identifier, unique within this service, for the information - * @ex: a CamelException - * - * This function is used by a CamelService to discuss authentication - * information with the application. - * - * @service and @item together uniquely identify the piece of data the - * caller is concerned with. - * - * If @mode is %CAMEL_AUTHENTICATOR_ASK, then @data is a question to - * ask the user (if the application doesn't already have the answer - * cached). If @secret is set, the user's input should not be echoed - * back. The authenticator should set @ex to - * %CAMEL_EXCEPTION_USER_CANCEL if the user did not provide the - * information. The caller must g_free() the information returned when - * it is done with it. - * - * If @mode is %CAMEL_AUTHENTICATOR_TELL, then @data is information - * that the application should cache, or %NULL if it should stop - * caching anything about that datum (eg, because the data is a - * password that turned out to be incorrect). - * - * Return value: the authentication information or %NULL. - **/ -char * -camel_session_query_authenticator (CamelSession *session, - CamelAuthCallbackMode mode, - char *prompt, gboolean secret, - CamelService *service, char *item, - CamelException *ex) -{ - return session->authenticator (mode, prompt, secret, - service, item, ex); -} - -#ifdef U_CANT_TOUCH_THIS -/** - * camel_session_query_cert_authenticator: - * @session: session object - * @prompt: prompt to query user with - * - * This function is used by SSL to discuss certificate authentication - * information with the application and/or user. Allows the user to - * override the SSL certificate authenticator, which, at this point, - * must have failed to authenticate the server. - * - * UI should be a Yes/No prompt probably defaulting to No. - * - * Return value: TRUE if the user decides that the SSL connection - * should continue with the untrusted server or FALSE otherwise. - **/ -gboolean -camel_session_query_cert_authenticator (CamelSession *session, - char *prompt) -{ - return session->cert_authenticator (prompt); -} -#endif /* U_CANT_TOUCH_THIS */ - - -/** - * camel_session_register_timeout: Register a timeout to be called - * periodically. - * - * @session: the CamelSession - * @interval: the number of milliseconds interval between calls - * @callback: the function to call - * @user_data: extra data to be passed to the callback - * - * This function will use the registrar callback provided upon - * camel_session_new to register the timeout. The callback will - * be called every @interval milliseconds until it returns @FALSE. - * It will be passed one argument, @user_data. - * - * Returns a nonzero handle that can be used with - * camel_session_remove_timeout on success, and 0 on failure to - * register the timeout. - **/ -guint -camel_session_register_timeout (CamelSession *session, - guint32 interval, - CamelTimeoutCallback callback, - gpointer user_data) -{ - g_return_val_if_fail (CAMEL_IS_SESSION (session), FALSE); - - return session->registrar (interval, callback, user_data); -} - -/** - * camel_session_remove_timeout: Remove a previously registered - * timeout. - * - * @session: the CamelSession - * @handle: a value returned from camel_session_register_timeout - * - * This function will use the remover callback provided upon - * camel_session_new to remove the timeout. - * - * Returns TRUE on success and FALSE on failure. - **/ -gboolean -camel_session_remove_timeout (CamelSession *session, guint handle) -{ - return session->remover (handle); -} - -/* ********************************************************************** */ - -struct _CamelCancel { - pthread_t id; /* id of running thread */ - guint32 flags; /* cancelled ? */ - int blocked; /* cancellation blocked depth */ - int refcount; -#ifdef ENABLE_THREADS - EMsgPort *cancel_port; - int cancel_fd; - pthread_mutex_t lock; -#endif -}; - -#define CAMEL_CANCEL_CANCELLED (1<<0) - -#ifdef ENABLE_THREADS -#define CAMEL_CANCEL_LOCK(cc) pthread_mutex_lock(&cc->lock) -#define CAMEL_CANCEL_UNLOCK(cc) pthread_mutex_unlock(&cc->lock) -#define CAMEL_ACTIVE_LOCK() pthread_mutex_lock(&cancel_active_lock) -#define CAMEL_ACTIVE_UNLOCK() pthread_mutex_unlock(&cancel_active_lock) -static pthread_mutex_t cancel_active_lock = PTHREAD_MUTEX_INITIALIZER; -#else -#define CAMEL_CANCEL_LOCK(cc) -#define CAMEL_CANCEL_UNLOCK(cc) -#define CAMEL_ACTIVE_LOCK() -#define CAMEL_ACTIVE_UNLOCK() -#endif - -static GHashTable *cancel_active; - -typedef struct _CamelCancelMsg { - EMsg msg; -} CamelCancelMsg ; - -/* creates a new cancel handle */ -CamelCancel *camel_cancel_new(void) -{ - CamelCancel *cc; - - cc = g_malloc0(sizeof(*cc)); - - cc->flags = 0; - cc->blocked = 0; - cc->refcount = 1; -#ifdef ENABLE_THREADS - cc->id = ~0; - cc->cancel_port = e_msgport_new(); - cc->cancel_fd = e_msgport_fd(cc->cancel_port); - pthread_mutex_init(&cc->lock, NULL); -#endif - - return cc; -} - -void camel_cancel_reset(CamelCancel *cc) -{ -#ifdef ENABLE_THREADS - CamelCancelMsg *msg; - - while ((msg = (CamelCancelMsg *)e_msgport_get(cc->cancel_port))) - g_free(msg); -#endif - - cc->flags = 0; - cc->blocked = 0; -} - -void camel_cancel_ref(CamelCancel *cc) -{ - CAMEL_CANCEL_LOCK(cc); - cc->refcount++; - CAMEL_CANCEL_UNLOCK(cc); -} - -void camel_cancel_unref(CamelCancel *cc) -{ -#ifdef ENABLE_THREADS - CamelCancelMsg *msg; - - if (cc->refcount == 1) { - while ((msg = (CamelCancelMsg *)e_msgport_get(cc->cancel_port))) - g_free(msg); - - e_msgport_destroy(cc->cancel_port); -#endif - g_free(cc); - } else { - CAMEL_CANCEL_LOCK(cc); - cc->refcount--; - CAMEL_CANCEL_UNLOCK(cc); - } -} - -/* block cancellation */ -void camel_cancel_block(CamelCancel *cc) -{ - CAMEL_CANCEL_LOCK(cc); - - cc->blocked++; - - CAMEL_CANCEL_UNLOCK(cc); -} - -/* unblock cancellation */ -void camel_cancel_unblock(CamelCancel *cc) -{ - CAMEL_CANCEL_LOCK(cc); - - cc->blocked--; - - CAMEL_CANCEL_UNLOCK(cc); -} - -static void -cancel_thread(void *key, CamelCancel *cc, void *data) -{ - if (cc) - camel_cancel_cancel(cc); -} - -/* cancels an operation */ -void camel_cancel_cancel(CamelCancel *cc) -{ - CamelCancelMsg *msg; - - if (cc == NULL) { - if (cancel_active) { - CAMEL_ACTIVE_LOCK(); - g_hash_table_foreach(cancel_active, (GHFunc)cancel_thread, NULL); - CAMEL_ACTIVE_UNLOCK(); - } - } else if ((cc->flags & CAMEL_CANCEL_CANCELLED) == 0) { - d(printf("cancelling thread %d\n", cc->id)); - - CAMEL_CANCEL_LOCK(cc); - msg = g_malloc0(sizeof(*msg)); - e_msgport_put(cc->cancel_port, (EMsg *)msg); - cc->flags |= CAMEL_CANCEL_CANCELLED; - CAMEL_CANCEL_UNLOCK(cc); - } -} - -/* register a thread for cancellation */ -void camel_cancel_register(CamelCancel *cc) -{ - pthread_t id = pthread_self(); - - CAMEL_ACTIVE_LOCK(); - - if (cancel_active == NULL) - cancel_active = g_hash_table_new(NULL, NULL); - - if (cc == NULL) { - cc = g_hash_table_lookup(cancel_active, (void *)id); - if (cc == NULL) { - cc = camel_cancel_new(); - } - } - - cc->id = id; - g_hash_table_insert(cancel_active, (void *)id, cc); - - d(printf("registering thread %d for cancellation\n", id)); - - CAMEL_ACTIVE_UNLOCK(); - - camel_cancel_ref(cc); -} - -/* remove a thread from being able to be cancelled */ -void camel_cancel_unregister(CamelCancel *cc) -{ - CAMEL_ACTIVE_LOCK(); - - if (cancel_active == NULL) - cancel_active = g_hash_table_new(NULL, NULL); - - if (cc == NULL) { - cc = g_hash_table_lookup(cancel_active, (void *)pthread_self()); - if (cc == NULL) { - g_warning("Trying to unregister a thread that was never registered for cancellation"); - } - } - - if (cc) - g_hash_table_remove(cancel_active, (void *)cc->id); - - CAMEL_ACTIVE_UNLOCK(); - - d({if (cc) printf("unregistering thread %d for cancellation\n", cc->id)}); - - if (cc) - camel_cancel_unref(cc); -} - -/* test for cancellation */ -gboolean camel_cancel_check(CamelCancel *cc) -{ - CamelCancelMsg *msg; - - d(printf("checking for cancel in thread %d\n", pthread_self())); - - if (cc == NULL) { - if (cancel_active) { - CAMEL_ACTIVE_LOCK(); - cc = g_hash_table_lookup(cancel_active, (void *)pthread_self()); - CAMEL_ACTIVE_UNLOCK(); - } - if (cc == NULL) - return FALSE; - } - - if (cc->blocked > 0) { - d(printf("ahah! cancellation is blocked\n")); - return FALSE; - } - - if (cc->flags & CAMEL_CANCEL_CANCELLED) { - d(printf("previously cancelled\n")); - return TRUE; - } - - msg = (CamelCancelMsg *)e_msgport_get(cc->cancel_port); - if (msg) { - d(printf("Got cancellation message\n")); - CAMEL_CANCEL_LOCK(cc); - cc->flags |= CAMEL_CANCEL_CANCELLED; - CAMEL_CANCEL_UNLOCK(cc); - return TRUE; - } - return FALSE; -} - -/* get the fd for cancellation waiting */ -int camel_cancel_fd(CamelCancel *cc) -{ - if (cc == NULL) { - if (cancel_active) { - CAMEL_ACTIVE_LOCK(); - cc = g_hash_table_lookup(cancel_active, (void *)pthread_self()); - CAMEL_ACTIVE_UNLOCK(); - } - if (cc == NULL) - return -1; - } - if (cc->blocked) - return -1; - - return cc->cancel_fd; -} - |