Changes in uspace/lib/c/generic/device/char_dev.c [ce79069b:79ae36dd] in mainline

File:

• uspace/lib/c/generic/device/char_dev.c (modified) (3 diffs)

uspace/lib/c/generic/device/char_dev.c

@@ -45 +45 @@
  * using its character interface.
  *
- * @param dev_phone     Phone to the device.
- * @param buf           Buffer for the data read from or written to the device.
- * @param size          Maximum size of data (in bytes) to be read or written.
- * @param read          Read from the device if true, write to it otherwise.
+ * @param sess Session to the device.
+ * @param buf  Buffer for the data read from or written to the device.
+ * @param size Maximum size of data (in bytes) to be read or written.
+ * @param read Read from the device if true, write to it otherwise.
  *
- * @return              Non-negative number of bytes actually read from or
- *                      written to the device on success, negative error number
- *                      otherwise.
+ * @return Non-negative number of bytes actually read from or
+ *         written to the device on success, negative error number
+ *         otherwise.
+ *
  */
-static ssize_t char_dev_rw(int dev_phone, void *buf, size_t size, bool read)
+static ssize_t char_dev_rw(async_sess_t *sess, void *buf, size_t size, bool read)
 {
-        async_serialize_start();
-        
         ipc_call_t answer;
         aid_t req;
         int ret;
         
+        async_exch_t *exch = async_exchange_begin(sess);
+        
         if (read) {
-                req = async_send_1(dev_phone, DEV_IFACE_ID(CHAR_DEV_IFACE),
+                req = async_send_1(exch, DEV_IFACE_ID(CHAR_DEV_IFACE),
                     CHAR_DEV_READ, &answer);
-                ret = async_data_read_start(dev_phone, buf, size);
+                ret = async_data_read_start(exch, buf, size);
         } else {
-                req = async_send_1(dev_phone, DEV_IFACE_ID(CHAR_DEV_IFACE),
+                req = async_send_1(exch, DEV_IFACE_ID(CHAR_DEV_IFACE),
                     CHAR_DEV_WRITE, &answer);
-                ret = async_data_write_start(dev_phone, buf, size);
+                ret = async_data_write_start(exch, buf, size);
         }
+        
+        async_exchange_end(exch);
         
         sysarg_t rc;
         if (ret != EOK) {
                 async_wait_for(req, &rc);
-                async_serialize_end();
                 if (rc == EOK)
                         return (ssize_t) ret;
@@ -83 +85 @@
         
         async_wait_for(req, &rc);
-        async_serialize_end();
         
         ret = (int) rc;
@@ -94 +95 @@
 /** Read from character device.
  *
- * @param dev_phone     Phone to the device.
- * @param buf           Output buffer for the data read from the device.
- * @param size          Maximum size (in bytes) of the data to be read.
+ * @param sess Session to the device.
+ * @param buf  Output buffer for the data read from the device.
+ * @param size Maximum size (in bytes) of the data to be read.
  *
- * @return              Non-negative number of bytes actually read from the
- *                      device on success, negative error number otherwise.
+ * @return Non-negative number of bytes actually read from the
+ *         device on success, negative error number otherwise.
+ *
  */
-ssize_t char_dev_read(int dev_phone, void *buf, size_t size)
+ssize_t char_dev_read(async_sess_t *sess, void *buf, size_t size)
 {
-        return char_dev_rw(dev_phone, buf, size, true);
+        return char_dev_rw(sess, buf, size, true);
 }
 
 /** Write to character device.
  *
- * @param dev_phone     Phone to the device.
- * @param buf           Input buffer containg the data to be written to the
- *                      device.
- * @param size          Maximum size (in bytes) of the data to be written.
+ * @param sess Session to the device.
+ * @param buf  Input buffer containg the data to be written to the
+ *             device.
+ * @param size Maximum size (in bytes) of the data to be written.
  *
- * @return              Non-negative number of bytes actually written to the
- *                      device on success, negative error number otherwise.
+ * @return Non-negative number of bytes actually written to the
+ *         device on success, negative error number otherwise.
+ *
  */
-ssize_t char_dev_write(int dev_phone, void *buf, size_t size)
+ssize_t char_dev_write(async_sess_t *sess, void *buf, size_t size)
 {
-        return char_dev_rw(dev_phone, buf, size, false);
+        return char_dev_rw(sess, buf, size, false);
 }