1 files changed, 42 insertions, 0 deletions
diff --git a/lib/libpthread/thread/thr_msync.c b/lib/libpthread/thread/thr_msync.c
new file mode 100644
index 0000000..24cbaa6
--- /dev/null
+++ b/lib/libpthread/thread/thr_msync.c
@@ -0,0 +1,42 @@
+/*
+ * David Leonard <d@openbsd.org>, 1999. Public Domain.
+ *
+ * $OpenBSD: uthread_msync.c,v 1.2 1999/06/09 07:16:17 d Exp $
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <pthread.h>
+#include "pthread_private.h"
+
+__weak_reference(__msync, msync);
+
+int
+_msync(void *addr, size_t len, int flags)
+{
+	int ret;
+
+	ret = __sys_msync(addr, len, flags);
+
+	return (ret);
+}
+
+int
+__msync(void *addr, size_t len, int flags)
+{
+	int	ret;
+
+	/*
+	 * XXX This is quite pointless unless we know how to get the
+	 * file descriptor associated with the memory, and lock it for
+	 * write. The only real use of this wrapper is to guarantee
+	 * a cancellation point, as per the standard. sigh.
+	 */
+	_thread_enter_cancellation_point();
+	ret = _msync(addr, len, flags);
+	_thread_leave_cancellation_point();
+
+	return ret;
+}