linux-stable/tools/io_uring/barrier.h
Jens Axboe 21b4aa5d20 io_uring: add a few test tools
This adds two test programs in tools/io_uring/ that demonstrate both
the raw io_uring API (and all features) through a small benchmark
app, io_uring-bench, and the liburing exposed API in a simplified
cp(1) implementation through io_uring-cp.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-03-06 13:00:16 -07:00

16 lines
441 B
C

#ifndef LIBURING_BARRIER_H
#define LIBURING_BARRIER_H
#if defined(__x86_64) || defined(__i386__)
#define read_barrier() __asm__ __volatile__("":::"memory")
#define write_barrier() __asm__ __volatile__("":::"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