1 files changed, 49 insertions, 0 deletions
diff --git a/sys/gnu/fs/xfs/FreeBSD/support/mrlock.c b/sys/gnu/fs/xfs/FreeBSD/support/mrlock.c
new file mode 100644
index 0000000..9503039
--- /dev/null
+++ b/sys/gnu/fs/xfs/FreeBSD/support/mrlock.c
@@ -0,0 +1,49 @@
+#include <sys/param.h>
+#include <support/mrlock.h>
+
+void
+_sx_xfs_destroy(struct sx *sx)
+{
+	if (sx->sx_cnt == -1)
+		sx_xunlock(sx);
+	sx_destroy(sx);
+}
+
+void
+_sx_xfs_lock(struct sx *sx, int type, const char *file, int line)
+{
+	if (type == MR_ACCESS)
+		_sx_slock(sx, file, line);
+	else if (type == MR_UPDATE)
+		_sx_sunlock(sx, file, line);
+	else
+		panic("Invalid lock type passed");
+}
+
+
+void
+_sx_xfs_unlock(struct sx *sx, const char *file, int line)
+{
+	if (_sx_xfs_xowned(sx))
+		_sx_xunlock(sx, file, line);
+	else if (_sx_xfs_sowned(sx))
+		_sx_sunlock(sx, file, line);
+	else
+		panic("lock is not locked");
+}
+
+int
+ismrlocked(mrlock_t *mrp, int type)
+{	
+	if (type == MR_ACCESS)
+		return _sx_xfs_sowned(mrp); /* Read lock */
+	else if (type == MR_UPDATE)
+		return _sx_xfs_xowned(mrp); /* Write lock */
+	else if (type == (MR_UPDATE | MR_ACCESS))
+		return  _sx_xfs_sowned(mrp) ||
+		        _sx_xfs_xowned(mrp); /* Any type of lock held */
+	return (mrp->sx_shrd_wcnt > 0 || mrp->sx_excl_wcnt > 0);
+}
+
+
+