From 44bed2543a1208bb3b08ed24305f65892c611cc9 Mon Sep 17 00:00:00 2001
From: pbd <pbd@0c269be4-1314-0410-8aa9-9f06e86f4224>
Date: Thu, 16 May 2002 01:18:29 +0000
Subject: directory reorganization

git-svn-id: svn+ssh://jackaudio.org/trunk/jack@188 0c269be4-1314-0410-8aa9-9f06e86f4224
---
 libjack/driver.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 libjack/driver.c

(limited to 'libjack/driver.c')

diff --git a/libjack/driver.c b/libjack/driver.c
new file mode 100644
index 0000000..6bfff97
--- /dev/null
+++ b/libjack/driver.c
@@ -0,0 +1,106 @@
+/*
+    Copyright (C) 2001 Paul Davis
+    
+    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 2.1 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 Lesser General Public License for more details.
+    
+    You should have received a copy of the GNU Lesser 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.
+    
+    $Id$
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <jack/driver.h>
+#include <jack/internal.h>
+#include <jack/error.h>
+
+static int dummy_attach (jack_driver_t *drv, jack_engine_t *eng) { return 0; }
+static int dummy_detach (jack_driver_t *drv, jack_engine_t *eng) { return 0; }
+static jack_nframes_t dummy_wait (jack_driver_t *drv, int fd, int *status, float *delayed_usecs) { *status = 0; *delayed_usecs = 0; return 0; }
+static int dummy_process (jack_driver_t *drv, jack_nframes_t nframes) { return 0; }
+static int dummy_stop (jack_driver_t *drv) { return 0; }
+static int dummy_start (jack_driver_t *drv) { return 0; }
+
+void
+jack_driver_init (jack_driver_t *driver)
+
+{
+	memset (driver, 0, sizeof (*driver));
+
+	driver->attach = dummy_attach;
+	driver->detach = dummy_detach;
+	driver->wait = dummy_wait;
+	driver->process = dummy_process;
+	driver->start = dummy_start;
+	driver->stop = dummy_stop;
+}
+
+jack_driver_t *
+jack_driver_load (int argc, char **argv)
+
+{
+	const char *errstr;
+	dlhandle handle;
+	jack_driver_t *driver;
+	jack_driver_t *(*initialize)(int, char **);
+	void (*finish)(jack_driver_t *);
+	char path_to_so[PATH_MAX+1];
+
+	snprintf (path_to_so, sizeof (path_to_so), ADDON_DIR "/jack_%s.so", argv[0]);
+	
+	handle = dlopen (path_to_so, RTLD_NOW|RTLD_GLOBAL);
+	
+	if (handle == 0) {
+		if ((errstr = dlerror ()) != 0) {
+			jack_error ("can't load \"%s\": %s", path_to_so, errstr);
+		} else {
+			jack_error ("bizarre error loading driver shared object %s", path_to_so);
+		}
+		return 0;
+	}
+
+	initialize = dlsym (handle, "driver_initialize");
+
+	if ((errstr = dlerror ()) != 0) {
+		jack_error ("no initialize function in shared object %s\n", path_to_so);
+		dlclose (handle);
+		return 0;
+	}
+
+	finish = dlsym (handle, "driver_finish");
+
+	if ((errstr = dlerror ()) != 0) {
+		jack_error ("no finish function in in shared driver object %s", path_to_so);
+		dlclose (handle);
+		return 0;
+	}
+
+	if ((driver = initialize (argc, argv)) != 0) {
+		driver->handle = handle;
+		driver->finish = finish;
+	}
+
+	return driver;
+
+}
+
+void
+jack_driver_unload (jack_driver_t *driver)
+{
+	driver->finish (driver);
+	dlclose (driver->handle);
+}
-- 
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