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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Authors: Michael Zucchi <notzed@ximian.com>
 *
 * Copyright 2000, Ximian, Inc. (www.ximian.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 Street #330, Boston, MA 02111-1307, USA.
 *
 */

#ifndef _MAIL_MT
#define _MAIL_MT

#include <pthread.h>
#include "camel/camel-exception.h"
#include "e-util/e-msgport.h"
#include "camel/camel-object.h"
#include "camel/camel-operation.h"

typedef struct _mail_msg {
    EMsg msg;       /* parent type */
    struct _mail_msg_op *ops; /* operation functions */
    unsigned int seq;   /* seq number for synchronisation */
    CamelOperation *cancel; /* a cancellation/status handle */
    CamelException ex;  /* an initialised camel exception, upto the caller to use this */
    struct _mail_msg_priv *priv; /* private for internal use */
} mail_msg_t;

/* callback functions for thread message */
typedef struct _mail_msg_op {
    char *(*describe_msg)(struct _mail_msg *msg, int complete);

    void (*receive_msg)(struct _mail_msg *msg); /* message received */
    void (*reply_msg)(struct _mail_msg *msg);   /* message replied */
    void (*destroy_msg)(struct _mail_msg *msg); /* finalise message */
} mail_msg_op_t;

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

/* allocate a new message */
void *mail_msg_new(mail_msg_op_t *ops, EMsgPort *reply_port, size_t size);
void mail_msg_free(void *msg);
void mail_msg_check_error(void *msg);
void mail_msg_cancel(unsigned int msgid);
void mail_msg_wait(unsigned int msgid);
void mail_msg_wait_all(void);
int mail_msg_active(unsigned int msgid);

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

/* present information and get an ok (or possibly cancel)
 * "type" is as for gnome_message_box_new();
 */
gboolean mail_user_message (const char *type, const char *prompt, gboolean allow_cancel);

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

/* create a new async event handler */
MailAsyncEvent *mail_async_event_new(void);
/* forward a camel event (or other call) to the gui thread */
int mail_async_event_emit(MailAsyncEvent *ea, CamelObjectEventHookFunc func, CamelObject *o, void *event_data, void *data);
/* wait for all outstanding async events to complete */
void mail_async_event_destroy(MailAsyncEvent *ea);

/* 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_ppippp,
} mail_call_t;

typedef void *(*MailMainFunc)();

void *mail_call_main(mail_call_t type, MailMainFunc func, ...);

/* a message port that receives messages in the gui thread, used for sending port */
extern EMsgPort *mail_gui_port;
/* a message port that receives messages in the gui thread, used for the reply port */
extern EMsgPort *mail_gui_reply_port;

/* some globally available threads */
extern EThread *mail_thread_queued; /* for operations that can (or should) be queued */
extern EThread *mail_thread_new;    /* for operations that should run in a new thread each time */
extern EThread *mail_thread_queued_slow;    /* for operations that can (or should) be queued, but take a long time */

/* The main thread. */
extern pthread_t mail_gui_thread;

/* 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 */