1 files changed, 79 insertions, 0 deletions
diff --git a/src/libstrongswan/threading/windows/spinlock.c b/src/libstrongswan/threading/windows/spinlock.c
new file mode 100644
index 000000000..155dd56dc
--- /dev/null
+++ b/src/libstrongswan/threading/windows/spinlock.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 revosec AG
+ *
+ * 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.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+#include <library.h>
+#include <threading/spinlock.h>
+
+typedef struct private_spinlock_t private_spinlock_t;
+
+/**
+ * private data of spinlock
+ */
+struct private_spinlock_t {
+
+	/**
+	 * public functions
+	 */
+	spinlock_t public;
+
+	/**
+	 * wrapped critical section
+	 */
+	CRITICAL_SECTION cs;
+};
+
+METHOD(spinlock_t, lock, void,
+	private_spinlock_t *this)
+{
+	EnterCriticalSection(&this->cs);
+}
+
+METHOD(spinlock_t, unlock, void,
+	private_spinlock_t *this)
+{
+	LeaveCriticalSection(&this->cs);
+}
+
+METHOD(spinlock_t, destroy, void,
+	private_spinlock_t *this)
+{
+	DeleteCriticalSection(&this->cs);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+spinlock_t *spinlock_create()
+{
+	private_spinlock_t *this;
+
+	INIT(this,
+		.public = {
+			.lock = _lock,
+			.unlock = _unlock,
+			.destroy = _destroy,
+		},
+	);
+
+	/* Usually the wait time in a spinlock should be short, so we could have
+	 * a high spincount. But having a large/INFINITE spincount does not scale
+	 * that well where a spinlock is not the perfect choice for a lock. We
+	 * choose the spincount quite arbitrary, so we go to wait if it is not
+	 * much more expensive than spinning. */
+	InitializeCriticalSectionAndSpinCount(&this->cs, 256);
+
+	return &this->public;
+}