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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Jeffrey Stedfast <fejj@ximian.com>
* Michael Zucchi <notzed@ximian.com>
*
* Copyright 2001 Ximian, Inc. (www.ximian.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* 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.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdio.h>
#include <camel/camel-stream.h>
#include <camel/camel-object.h>
#include <gtk/gtkmain.h>
#include "em-sync-stream.h"
#include "mail-mt.h"
#define LOG_STREAM
#define d(x)
#define EMSS_CLASS(x) ((EMSyncStreamClass *)(((CamelObject *)(x))->klass))
struct _EMSyncStreamPrivate {
/* FIXME: use a single data port/gui channel for all instances */
/* TODO: possibly just use one of the mail-mt ports ... */
struct _EMsgPort *data_port, *reply_port;
struct _GIOChannel *gui_channel;
guint gui_watch;
char *buf_data;
int buf_used;
int buf_size;
#ifdef LOG_STREAM
FILE *logfd;
#endif
};
#ifdef LOG_STREAM
int dolog;
#endif
/* Should probably expose messages to outside world ... so subclasses can extend */
enum _write_msg_t {
EMSS_WRITE,
EMSS_FLUSH,
EMSS_CLOSE,
};
struct _write_msg {
EMsg msg;
enum _write_msg_t op;
const char *data;
size_t n;
};
static void em_sync_stream_class_init (EMSyncStreamClass *klass);
static void em_sync_stream_init (CamelObject *object);
static void em_sync_stream_finalize (CamelObject *object);
static ssize_t stream_write(CamelStream *stream, const char *buffer, size_t n);
static int stream_close(CamelStream *stream);
static int stream_flush(CamelStream *stream);
static CamelStreamClass *parent_class = NULL;
CamelType
em_sync_stream_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
#ifdef LOG_STREAM
dolog = getenv("EVOLUTION_MAIL_LOG_HTML") != NULL;
#endif
type = camel_type_register (CAMEL_STREAM_TYPE,
"EMSyncStream",
sizeof (EMSyncStream),
sizeof (EMSyncStreamClass),
(CamelObjectClassInitFunc) em_sync_stream_class_init,
NULL,
(CamelObjectInitFunc) em_sync_stream_init,
(CamelObjectFinalizeFunc) em_sync_stream_finalize);
}
return type;
}
static void
em_sync_stream_class_init (EMSyncStreamClass *klass)
{
CamelStreamClass *stream_class = CAMEL_STREAM_CLASS (klass);
parent_class = (CamelStreamClass *) CAMEL_STREAM_TYPE;
/* virtual method overload */
stream_class->write = stream_write;
stream_class->flush = stream_flush;
stream_class->close = stream_close;
}
static gboolean
emcs_gui_received(GIOChannel *source, GIOCondition cond, void *data)
{
EMSyncStream *emss = data;
struct _EMSyncStreamPrivate *p = emss->priv;
struct _write_msg *msg;
d(printf("%p: gui sync op job waiting\n", emss));
msg = (struct _write_msg *)e_msgport_get(p->data_port);
/* Should never happen ... */
if (msg == NULL)
return TRUE;
d(printf("%p: running sync op %d\n", emss, msg->op));
/* force out any pending data before doing anything else */
if (p->buf_used > 0) {
EMSS_CLASS(emss)->sync_write((CamelStream *)emss, p->buf_data, p->buf_used);
#ifdef LOG_STREAM
if (p->logfd)
fwrite(p->buf_data, 1, p->buf_used, p->logfd);
#endif
p->buf_used = 0;
}
/* FIXME: need to handle return values */
switch (msg->op) {
case EMSS_WRITE:
EMSS_CLASS(emss)->sync_write((CamelStream *)emss, msg->data, msg->n);
#ifdef LOG_STREAM
if (p->logfd)
fwrite(msg->data, 1, msg->n, p->logfd);
#endif
break;
case EMSS_FLUSH:
EMSS_CLASS(emss)->sync_flush((CamelStream *)emss);
break;
case EMSS_CLOSE:
EMSS_CLASS(emss)->sync_close((CamelStream *)emss);
#ifdef LOG_STREAM
if (p->logfd) {
fclose(p->logfd);
p->logfd = NULL;
}
#endif
break;
}
e_msgport_reply((EMsg *)msg);
d(printf("%p: gui sync op jobs done\n", emss));
return TRUE;
}
static void
em_sync_stream_init (CamelObject *object)
{
EMSyncStream *emss = (EMSyncStream *)object;
struct _EMSyncStreamPrivate *p;
p = emss->priv = g_malloc0(sizeof(*p));
p->data_port = e_msgport_new();
p->reply_port = e_msgport_new();
p->gui_channel = g_io_channel_unix_new(e_msgport_fd(p->data_port));
p->gui_watch = g_io_add_watch(p->gui_channel, G_IO_IN, emcs_gui_received, emss);
#ifdef LOG_STREAM
if (dolog) {
char name[32];
static int count;
sprintf(name, "sync-stream.%d.html", count++);
printf("Saving raw data stream to '%s'\n", name);
p->logfd = fopen(name, "w");
}
#endif
d(printf("%p: new emss\n", emss));
}
static void
sync_op(EMSyncStream *emss, enum _write_msg_t op, const char *data, size_t n)
{
struct _EMSyncStreamPrivate *p = emss->priv;
struct _write_msg msg;
d(printf("%p: launching sync op %d\n", emss, op));
/* we do everything synchronous, we should never have any locks, and
this prevents overflow from banked up data */
msg.msg.reply_port = p->reply_port;
msg.op = op;
msg.data = data;
msg.n = n;
e_msgport_put(p->data_port, &msg.msg);
e_msgport_wait(p->reply_port);
g_assert(e_msgport_get(msg.msg.reply_port) == &msg.msg);
d(printf("%p: returned sync op %d\n", emss, op));
}
static void
em_sync_stream_finalize (CamelObject *object)
{
EMSyncStream *emss = (EMSyncStream *)object;
struct _EMSyncStreamPrivate *p = emss->priv;
/* TODO: is this stuff safe to do in another thread? */
g_source_remove(p->gui_watch);
g_io_channel_unref(p->gui_channel);
e_msgport_destroy(p->data_port);
e_msgport_destroy(p->reply_port);
p->data_port = NULL;
p->reply_port = NULL;
g_free(p->buf_data);
#ifdef LOG_STREAM
if (p->logfd)
fclose(p->logfd);
#endif
g_free(p);
}
static ssize_t
stream_write (CamelStream *stream, const char *buffer, size_t n)
{
EMSyncStream *emss = EM_SYNC_STREAM (stream);
struct _EMSyncStreamPrivate *p = emss->priv;
if (emss->cancel)
return -1;
if (pthread_equal(pthread_self(), mail_gui_thread)) {
EMSS_CLASS(emss)->sync_write(stream, buffer, n);
#ifdef LOG_STREAM
if (p->logfd)
fwrite(buffer, 1, n, p->logfd);
#endif
} else if (p->buf_size > 0) {
size_t left = p->buf_size-p->buf_used;
if (n >= left) {
sync_op(emss, EMSS_WRITE, buffer, n);
} else {
memcpy(p->buf_data + p->buf_used, buffer, n);
p->buf_used += n;
}
} else {
sync_op(emss, EMSS_WRITE, buffer, n);
}
return (ssize_t) n;
}
static int
stream_flush(CamelStream *stream)
{
EMSyncStream *emss = (EMSyncStream *)stream;
if (emss->cancel)
return -1;
if (pthread_equal(pthread_self(), mail_gui_thread))
return ((EMSyncStreamClass *)(((CamelObject *)emss)->klass))->sync_flush(stream);
else
sync_op(emss, EMSS_FLUSH, NULL, 0);
return 0;
}
static int
stream_close(CamelStream *stream)
{
EMSyncStream *emss = (EMSyncStream *)stream;
if (emss->cancel)
return -1;
d(printf("%p: closing stream\n", stream));
if (pthread_equal(pthread_self(), mail_gui_thread)) {
#ifdef LOG_STREAM
if (emss->priv->logfd) {
fclose(emss->priv->logfd);
emss->priv->logfd = NULL;
}
#endif
return ((EMSyncStreamClass *)(((CamelObject *)emss)->klass))->sync_close(stream);
} else
sync_op(emss, EMSS_CLOSE, NULL, 0);
return 0;
}
void
em_sync_stream_set_buffer_size(EMSyncStream *emss, size_t size)
{
struct _EMSyncStreamPrivate *p = emss->priv;
g_free(p->buf_data);
p->buf_data = g_malloc(size);
p->buf_size = size;
p->buf_used = 0;
}
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