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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Michael Zucchi <notzed@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifndef _MAIL_MT
#define _MAIL_MT

#include <camel/camel.h>

typedef struct _MailMsg MailMsg;
typedef struct _MailMsgInfo MailMsgInfo;
typedef struct _MailMsgPrivate MailMsgPrivate;

typedef gchar * (*MailMsgDescFunc)  (MailMsg *msg);
typedef void    (*MailMsgExecFunc)  (MailMsg *msg);
typedef void    (*MailMsgDoneFunc)  (MailMsg *msg);
typedef void    (*MailMsgFreeFunc)  (MailMsg *msg);
typedef void    (*MailMsgDispatchFunc)  (gpointer msg);

struct _MailMsg {
    MailMsgInfo *info;
    volatile gint ref_count;
    guint seq;  /* seq number for synchronisation */
    gint priority;      /* priority (default = 0) */
    CamelOperation *cancel; /* a cancellation/status handle */
    GError *error;      /* up to the caller to use this */
    MailMsgPrivate *priv;
};

struct _MailMsgInfo {
    gsize size;
    MailMsgDescFunc desc;
    MailMsgExecFunc exec;
    MailMsgDoneFunc done;
    MailMsgFreeFunc free;
};

/* setup ports */
void mail_msg_init (void);
void mail_msg_cleanup (void);

gboolean mail_in_main_thread (void);

/* allocate a new message */
gpointer mail_msg_new (MailMsgInfo *info);
gpointer mail_msg_ref (gpointer msg);
void mail_msg_unref (gpointer msg);
void mail_msg_check_error (gpointer msg);
void mail_msg_cancel (guint msgid);
void mail_msg_wait (guint msgid);
void mail_msg_wait_all (void);
gint mail_msg_active (guint msgid);

/* dispatch a message */
void mail_msg_main_loop_push (gpointer msg);
void mail_msg_unordered_push (gpointer msg);
void mail_msg_fast_ordered_push (gpointer msg);
void mail_msg_slow_ordered_push (gpointer msg);

/* To implement the stop button */
GHook * mail_cancel_hook_add (GHookFunc func, gpointer data);
void mail_cancel_hook_remove (GHook *hook);
void mail_cancel_all (void);
void mail_msg_set_cancelable (gpointer msg, gboolean status);

/* request a string/password */
gchar *mail_get_password (CamelService *service, const gchar *prompt,
             gboolean secret, gboolean *cache);

/* asynchronous event proxies */
typedef struct _MailAsyncEvent {
    GMutex *lock;
    GSList *tasks;
} MailAsyncEvent;

typedef enum _mail_async_event_t {
    MAIL_ASYNC_GUI,
    MAIL_ASYNC_THREAD
} mail_async_event_t;

typedef void (*MailAsyncFunc)(gpointer , gpointer , gpointer );

/* create a new async event handler */
MailAsyncEvent *mail_async_event_new (void);
/* forward a camel event (or other call) to the gui thread */
guint mail_async_event_emit (MailAsyncEvent *ea, mail_async_event_t type, MailAsyncFunc func, gpointer , gpointer , gpointer );
/* wait for all outstanding async events to complete */
gint mail_async_event_destroy (MailAsyncEvent *ea);

void mail_mt_set_backend (gchar *backend);

/* Call a function in the gui thread, wait for it to return, type is the marshaller to use */
typedef enum {
    MAIL_CALL_p_p,
    MAIL_CALL_p_pp,
    MAIL_CALL_p_ppp,
    MAIL_CALL_p_pppp,
    MAIL_CALL_p_ppppp,
    MAIL_CALL_p_ppippp
} mail_call_t;

typedef gpointer (*MailMainFunc)();

gpointer mail_call_main (mail_call_t type, MailMainFunc func, ...);

/* A generic proxy event for anything that can be proxied during the life of the mailer (almost nothing) */
/* Note that almost all objects care about the lifecycle of their events, so this cannot be used */
extern MailAsyncEvent *mail_async_event;

#endif /* _MAIL_MT */