deps: Add liblmza

Used by the update module on windows.

deps/lzma/common/mythread.h

@@ -0,0 +1,42 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       mythread.h
+/// \brief      Wrappers for threads
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "sysdefs.h"
+
+
+#ifdef HAVE_PTHREAD
+#	include <pthread.h>
+
+#	define mythread_once(func) \
+	do { \
+		static pthread_once_t once_ = PTHREAD_ONCE_INIT; \
+		pthread_once(&once_, &func); \
+	} while (0)
+
+#	define mythread_sigmask(how, set, oset) \
+		pthread_sigmask(how, set, oset)
+
+#else
+
+#	define mythread_once(func) \
+	do { \
+		static bool once_ = false; \
+		if (!once_) { \
+			func(); \
+			once_ = true; \
+		} \
+	} while (0)
+
+#	define mythread_sigmask(how, set, oset) \
+		sigprocmask(how, set, oset)
+
+#endif