Integrate the multiplexer into the AT chat library

1 files changed, 127 insertions, 0 deletions

diff --git a/gatchat/gatmux.c b/gatchat/gatmux.c
new file mode 100644
index 00000000..6c67bfd6
--- /dev/null
+++ b/gatchat/gatmux.c
@@ -0,0 +1,127 @@
+/*
+ *
+ *  AT chat library with GLib integration
+ *
+ *  Copyright (C) 2008-2009  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <termios.h>
+
+#include <glib.h>
+
+#include "gsm0710.h"
+#include "gatmux.h"
+
+struct _GAtMux {
+	gint ref_count;		/* Ref count */
+	GIOChannel *channel;	/* channel */
+};
+
+GAtMux *g_at_mux_new(GIOChannel *channel)
+{
+	GAtMux *mux;
+
+	if (!channel)
+		return NULL;
+
+	mux = g_try_new0(GAtMux, 1);
+
+	if (!mux)
+		return mux;
+
+	mux->ref_count = 1;
+
+	mux->channel = channel;
+
+	return mux;
+}
+
+static int open_device(const char *device)
+{
+	struct termios ti;
+	int fd;
+
+	fd = open(device, O_RDWR | O_NOCTTY);
+	if (fd < 0)
+		return -1;
+
+	tcflush(fd, TCIOFLUSH);
+
+	/* Switch TTY to raw mode */
+	memset(&ti, 0, sizeof(ti));
+	cfmakeraw(&ti);
+
+	tcsetattr(fd, TCSANOW, &ti);
+
+	return fd;
+}
+
+GAtMux *g_at_mux_new_from_tty(const char *device)
+{
+	GIOChannel *channel;
+	int fd;
+
+	fd = open_device(device);
+	if (fd < 0)
+		return NULL;
+
+	channel = g_io_channel_unix_new(fd);
+	if (!channel) {
+		close(fd);
+		return NULL;
+	}
+
+	return g_at_mux_new(channel);
+}
+
+GAtMux *g_at_mux_ref(GAtMux *mux)
+{
+	if (mux == NULL)
+		return NULL;
+
+	g_atomic_int_inc(&mux->ref_count);
+
+	return mux;
+}
+
+void g_at_mux_unref(GAtMux *mux)
+{
+	if (mux == NULL)
+		return;
+
+	if (g_atomic_int_dec_and_test(&mux->ref_count)) {
+		g_at_mux_shutdown(mux);
+
+		g_free(mux);
+	}
+}
+
+gboolean g_at_mux_shutdown(GAtMux *mux)
+{
+	if (mux->channel == NULL)
+		return FALSE;
+
+	return TRUE;
+}