amd.h
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2007, 2008 Free Software Foundation, Inc.
This library 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 3 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA */
#define MAX_OPEN_STREAMS 16
/* Notifications ADD_MESG. */
#define DISPATCH_ADD_MSG(mbox,mhd,n) \
do \
{ \
int bailing = 0; \
mu_monitor_unlock (mbox->monitor); \
if (mbox->observable) \
{ \
size_t tmp = n; \
bailing = mu_observable_notify (mbox->observable, \
MU_EVT_MESSAGE_ADD, \
&tmp); \
} \
if (bailing != 0) \
{ \
if (pcount) \
*pcount = (mhd)->msg_count; \
mu_locker_unlock (mbox->locker); \
return EINTR; \
} \
mu_monitor_wrlock (mbox->monitor); \
} while (0);
#define MU_AMD_SIZE_FILE_NAME ".mu-size"
struct _amd_data;
struct _amd_message
{
mu_stream_t stream; /* Associated file stream */
mu_off_t body_start; /* Offset of body start in the message file */
mu_off_t body_end; /* Offset of body end (size of file, effectively)*/
int orig_flags; /* Original attribute flags */
int attr_flags; /* Current attribute flags */
time_t mtime; /* Time of last modification */
size_t header_lines; /* Number of lines in the header part */
size_t body_lines; /* Number of lines in the body */
mu_message_t message; /* Corresponding mu_message_t */
struct _amd_data *amd; /* Back pointer. */
};
struct _amd_data
{
size_t msg_size; /* Size of struct _amd_message */
int (*create) (struct _amd_data *, int flags);
int (*msg_init_delivery) (struct _amd_data *, struct _amd_message *);
int (*msg_finish_delivery) (struct _amd_data *, struct _amd_message *,
const mu_message_t);
void (*msg_free) (struct _amd_message *);
int (*cur_msg_file_name) (struct _amd_message *, char **);
int (*new_msg_file_name) (struct _amd_message *, int attr_flags, char **);
int (*scan0) (mu_mailbox_t mailbox, size_t msgno, size_t *pcount,
int do_notify);
int (*mailbox_size) (mu_mailbox_t mailbox, mu_off_t *psize);
int (*qfetch) (struct _amd_data *, mu_message_qid_t qid);
int (*msg_cmp) (struct _amd_message *, struct _amd_message *);
int (*message_uid) (mu_message_t msg, size_t *puid);
size_t (*next_uid) (struct _amd_data *mhd);
/* List of messages: */
size_t msg_count; /* number of messages in the list */
size_t msg_max; /* maximum message buffer capacity */
struct _amd_message **msg_array;
unsigned long uidvalidity;
int has_new_msg; /* New messages have been appended */
char *name; /* Directory name */
/* Pool of open message streams */
struct _amd_message *msg_pool[MAX_OPEN_STREAMS];
int pool_first; /* Index to the first used entry in msg_pool */
int pool_last; /* Index to the first free entry in msg_pool */
time_t mtime; /* Time of last modification */
mu_mailbox_t mailbox; /* Back pointer. */
};
int amd_init_mailbox (mu_mailbox_t mailbox, size_t mhd_size,
struct _amd_data **pmhd);
int _amd_message_insert (struct _amd_data *mhd, struct _amd_message *msg);
int amd_message_stream_open (struct _amd_message *mhm);
void amd_message_stream_close (struct _amd_message *mhm);
void amd_cleanup (void *arg);
struct _amd_message *_amd_get_message (struct _amd_data *amd, size_t msgno);
int amd_msg_lookup (struct _amd_data *amd, struct _amd_message *msg,
size_t *pret);