rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 115 insertions, 0 deletions

diff --git a/libs/pbd/transmitter.cc b/libs/pbd/transmitter.cc
new file mode 100644
index 0000000000..876a9d86e5
--- /dev/null
+++ b/libs/pbd/transmitter.cc
@@ -0,0 +1,115 @@
+/*
+    Copyright (C) 1998-99 Paul Barton-Davis 
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id$
+*/
+
+#include <cstdlib>
+#include <signal.h>
+#include <iostream>
+#include <string>
+
+#include <pbd/transmitter.h>
+#include <pbd/error.h>
+
+using std::string;
+using std::ios;
+
+Transmitter::Transmitter (Channel c)
+{
+	channel = c;
+	switch (c) {
+	case Error:
+		send = &error;
+		break;
+	case Warning:
+		send = &warning;
+		break;
+	case Info:
+		send = &info;
+		break;
+	case Fatal:
+		send = &fatal;
+		break;
+	case Throw:
+		/* we should never call Transmitter::deliver
+		   for thrown messages (because its overridden in the
+		   class heirarchy). force a segv if we do.
+		*/
+		send = 0;
+		break;
+	}
+}		
+
+void
+Transmitter::deliver ()
+
+{
+	string foo;
+
+	/* NOTE: this is just a default action for a Transmitter or a
+	   derived class. Any class can override this to produce some
+	   other action when deliver() is called. 
+	*/
+
+	*this << '\0';
+
+	/* send the SigC++ signal */
+
+	foo = str();
+	(*send) (channel, foo.c_str());
+
+	/* XXX when or how can we delete this ? */
+	// delete foo;
+
+	/* return to a pristine state */
+
+	clear ();
+	seekp (0, ios::beg);
+	seekg (0, ios::beg);
+
+	/* do the right thing if this should not return */
+	
+	if (does_not_return()) {
+		sigset_t mask;
+		
+		sigemptyset (&mask);
+		sigsuspend (&mask);
+		/*NOTREACHED*/
+		exit (1);
+	} 
+}
+
+bool
+Transmitter::does_not_return ()
+
+{
+	if (channel == Fatal || channel == Throw) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+
+extern "C" {
+  void pbd_c_error (const char *str)
+ 
+  {
+	PBD::error << str << endmsg;
+  }
+}