diff --git a/src/lock/win32/lock.c b/src/lock/win32/lock.c
new file mode 100644
index 0000000..8fb4362
--- /dev/null
+++ b/src/lock/win32/lock.c
@@ -0,0 +1,72 @@
+/**
+ * @file win32/lock.c  Locking for Windows
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+#undef  _WIN32_WINNT
+#define _WIN32_WINNT 0x0400
+#include <windows.h>
+#include <re_types.h>
+#include <re_mem.h>
+#include <re_lock.h>
+
+
+struct lock {
+	CRITICAL_SECTION c;
+};
+
+
+static void lock_destructor(void *data)
+{
+	struct lock *l = data;
+
+	DeleteCriticalSection(&l->c);
+}
+
+
+int lock_alloc(struct lock **lp)
+{
+	struct lock *l;
+
+	if (!lp)
+		return EINVAL;
+
+	l = mem_alloc(sizeof(*l), lock_destructor);
+	if (!l)
+		return ENOMEM;
+
+	InitializeCriticalSection(&l->c);
+
+	*lp = l;
+	return 0;
+}
+
+
+void lock_read_get(struct lock *l)
+{
+	EnterCriticalSection(&l->c);
+}
+
+
+void lock_write_get(struct lock *l)
+{
+	EnterCriticalSection(&l->c);
+}
+
+
+int lock_read_try(struct lock *l)
+{
+	return TryEnterCriticalSection(&l->c) ? 0 : ENODEV;
+}
+
+
+int lock_write_try(struct lock *l)
+{
+	return TryEnterCriticalSection(&l->c) ? 0 : ENODEV;
+}
+
+
+void lock_rel(struct lock *l)
+{
+	LeaveCriticalSection(&l->c);
+}