1 files changed, 99 insertions, 0 deletions
diff --git a/soundserver/soundserverstartup_impl.cc b/soundserver/soundserverstartup_impl.cc
new file mode 100644
index 0000000..ba68dd4
--- /dev/null
+++ b/soundserver/soundserverstartup_impl.cc
@@ -0,0 +1,99 @@
+    /*
+
+    Copyright (C) 2003 Stefan Westerfeld
+                       stefan@space.twc.de
+
+    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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+    */
+
+#include "config.h"
+#include "debug.h"
+#include "soundserverstartup_impl.h"
+#include <sys/time.h>
+#include <time.h>
+#include <cstdlib>
+
+using namespace Arts;
+
+SoundServerStartup_impl::SoundServerStartup_impl()
+{
+	locked = false;
+	/*
+	 * create a sane random seed, pseudo random is not enough for
+	 * our purposes
+	 */
+	timeval tv;
+	gettimeofday(&tv, NULL);
+
+	int pid = getpid();
+	srand(tv.tv_sec);
+	srand(rand() + tv.tv_usec);
+	srand(rand() + pid);
+}
+
+SoundServerStartup_impl::~SoundServerStartup_impl()
+{
+	if (locked)
+		unlock();
+}
+
+void SoundServerStartup_impl::cleanReference()
+{
+	SoundServerStartup test = Reference("global:Arts_SoundServerStartup");
+	if(test.isNull())
+		Dispatcher::the()->globalComm().erase("Arts_SoundServerStartup");
+}
+
+void SoundServerStartup_impl::lock()
+{
+	arts_return_if_fail (!locked);
+
+	while (!ObjectManager::the()->addGlobalReference(self(), "Arts_SoundServerStartup"))
+	{
+		arts_debug ("[artsd: %5d] parallel startup detected: sleeping",getpid());
+
+		/*
+		 * if several instances of artsd are started at the same time,
+		 * we don't want all of them to retry getting a reference at
+		 * exactly the same moment ; thus we sleep for a random amount
+		 * of time, rather than for exactly one second, if possible
+		 */
+#ifdef HAVE_USLEEP
+		usleep((rand() % 700000) + 200000);
+#else
+		sleep(1);
+#endif
+		cleanReference();
+	}
+	locked = true;
+	arts_debug ("[artsd: %5d] SoundServerStartup --> got lock",getpid());
+}
+
+void SoundServerStartup_impl::unlock()
+{
+	arts_return_if_fail (locked);
+
+	arts_debug ("[artsd: %5d] SoundServerStartup <-- released lock",getpid());
+	Dispatcher::the()->globalComm().erase("Arts_SoundServerStartup");
+	locked = false;
+}
+
+namespace Arts {
+#ifndef __SUNPRO_CC
+	/* See bottom of simplesoundserver_impl.cc for the reason this is here.  */
+REGISTER_IMPLEMENTATION(SoundServerStartup_impl);
+#endif
+}