Changeset f2d88f3 in mainline for uspace/lib/c/generic/io/chardev.c

Timestamp:

2019-01-04T21:22:17Z (5 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

af7b85b

Parents:

06412ba

Message:

Add forgotten changes to enable non-blocking chardev read

File:

• uspace/lib/c/generic/io/chardev.c (modified) (2 diffs)

uspace/lib/c/generic/io/chardev.c

@@ -91 +91 @@
  * @param size Maximum number of bytes to read
  * @param nread Place to store actual number of bytes read
+ * @param flags @c chardev_f_nonblock to return immediately even if no
+ *              bytes are available
  *
  * @return EOK on success or non-zero error code
  */
-errno_t chardev_read(chardev_t *chardev, void *buf, size_t size, size_t *nread)
+errno_t chardev_read(chardev_t *chardev, void *buf, size_t size, size_t *nread,
+    chardev_flags_t flags)
 {
         async_exch_t *exch = async_exchange_begin(chardev->sess);
@@ -104 +107 @@
 
         ipc_call_t answer;
-        aid_t req = async_send_0(exch, CHARDEV_READ, &answer);
+        aid_t req = async_send_1(exch, CHARDEV_READ, flags, &answer);
         errno_t rc = async_data_read_start(exch, buf, size);
         async_exchange_end(exch);