liburing: add extern "C" to liburing.h

Make header includable from C++ projects.

Signed-off-by: Kevin Vigor <kvigor@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

src/liburing.h

@@ -1,6 +1,10 @@
 #ifndef LIB_URING_H
 #define LIB_URING_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <sys/uio.h>
 #include <signal.h>
 #include <inttypes.h>
@@ -171,4 +175,8 @@ static inline void io_uring_prep_nop(struct io_uring_sqe *sqe)
 	sqe->opcode = IORING_OP_NOP;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif