Changeset a86b1b85 for examples/io_uring.c

Timestamp:

Jul 27, 2020, 1:32:39 PM (4 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

f3ed2af

Parents:

5b15c4f

Message:

io_uring example now uses O_DIRECT to test polling support

File:

• examples/io_uring.c (modified) (5 diffs)

examples/io_uring.c

@@ +1 @@
+#define _GNU_SOURCE
+
 #include <fcntl.h>
 #include <liburing.h>
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 
@@ -12 +15 @@
       }
 
-      int fd = open(argv[1], 0);
+      int fd = open(argv[1], O_DIRECT);
       if(fd < 0) {
             printf("Could not open file %s.\n", argv[1]);
@@ -23 +26 @@
 
       /* init liburing */
-      io_uring_queue_init(256, &ring, 0);
+      io_uring_queue_init(256, &ring, IORING_SETUP_IOPOLL);
 
       /* declare required structs */
@@ -40 +43 @@
       /* wait for the sqe to complete */
       int ret = io_uring_wait_cqe(&ring, &cqe);
-      
+
       /* read and process cqe event */
       if(ret == 0) {
@@ -49 +52 @@
             if(len > 0) {
                   printf("%.*s", len, out);
+            }
+            else if( len < 0 ) {
+                  fprintf(stderr, "readv returned error : %s\n", strerror(-len));
             }
       }