Changeset e72fb34 in mainline for uspace/lib/c/generic/devman.c

Timestamp:

2011-03-30T14:26:54Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

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

Children:

0864122

Parents:

fc8c2b6

Message:

Add getting device handle by class path to libc

File:

• uspace/lib/c/generic/devman.c (modified) (1 diff)

uspace/lib/c/generic/devman.c

@@ -329 +329 @@
 }
 
+int devman_device_get_handle_by_class(const char *classname,
+    const char *devname, devman_handle_t *handle, unsigned int flags)
+{
+        int phone = devman_get_phone(DEVMAN_CLIENT, flags);
+
+        if (phone < 0)
+                return phone;
+
+        async_serialize_start();
+
+        ipc_call_t answer;
+        aid_t req = async_send_1(phone, DEVMAN_DEVICE_GET_HANDLE_BY_CLASS,
+            flags, &answer);
+
+        sysarg_t retval = async_data_write_start(phone, classname,
+            str_size(classname));
+        if (retval != EOK) {
+                async_wait_for(req, NULL);
+                async_serialize_end();
+                return retval;
+        }
+        retval = async_data_write_start(phone, devname,
+            str_size(devname));
+        if (retval != EOK) {
+                async_wait_for(req, NULL);
+                async_serialize_end();
+                return retval;
+        }
+
+        async_wait_for(req, &retval);
+
+        async_serialize_end();
+
+        if (retval != EOK) {
+                if (handle != NULL)
+                        *handle = (devman_handle_t) -1;
+                return retval;
+        }
+
+        if (handle != NULL)
+                *handle = (devman_handle_t) IPC_GET_ARG1(answer);
+
+        return retval;
+}
+
 
 /** @}