Rework audio thread restart.

PiPedalCommon/src/AlsaSequencer.cpp

@@ -259,6 +259,8 @@ namespace pipedal
         // Open sequencer in input mode
         int rc;
 
+        Lv2Log::debug("Opening ALSA Sequencer");
+
         rc = snd_seq_open(&seqHandle, "default", SND_SEQ_OPEN_DUPLEX, 0);
         if (rc < 0)
         {

PiPedalCommon/src/include/restrict.hpp

@@ -0,0 +1,33 @@
+/*
+ *   Copyright (c) 2022 Robin E. R. Davies
+ *   All rights reserved.
+
+ *   Permission is hereby granted, free of charge, to any person obtaining a copy
+ *   of this software and associated documentation files (the "Software"), to deal
+ *   in the Software without restriction, including without limitation the rights
+ *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *   copies of the Software, and to permit persons to whom the Software is
+ *   furnished to do so, subject to the following conditions:
+ 
+ *   The above copyright notice and this permission notice shall be included in all
+ *   copies or substantial portions of the Software.
+ 
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *   SOFTWARE.
+ */
+#pragma once
+
+
+// define restrict keyword for C++ compilers (which don't yet support it)
+#ifndef restrict
+#if defined(__GNUC__) || defined(__clang__)
+#define restrict __restrict__
+#elif defined(_MSC_VER)
+#define restrict __restrict
+#endif
+#endif