Initial commit

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-01-08 06:51:07 -07:00
commit f93c84e1b0
12 changed files with 1186 additions and 0 deletions
--- a/src/barrier.h
+++ b/src/barrier.h
@@ -0,0 +1,16 @@
+#ifndef LIBURING_BARRIER_H
+#define LIBURING_BARRIER_H
+
+#if defined(__x86_64)
+#define read_barrier()	__asm__ __volatile__("lfence":::"memory")
+#define write_barrier()	__asm__ __volatile__("sfence":::"memory")
+#else
+/*
+ * Add arch appropriate definitions. Be safe and use full barriers for
+ * archs we don't have support for.
+ */
+#define read_barrier()	__sync_synchronize()
+#define write_barrier()	__sync_synchronize()
+#endif
+
+#endif