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Changeset 76ef94e in mainline for uspace/lib/c/generic/devman.c


Ignore:
Timestamp:
2011-05-07T15:51:20Z (11 years ago)
Author:
Jan Vesely <jano.vesely@…>
Branches:
lfn, master
Children:
3ae5ca8
Parents:
d2bff2f (diff), b23e9cc (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Development branch changes

File:
1 edited

Legend:

Unmodified
Added
Removed
  • uspace/lib/c/generic/devman.c

    rd2bff2f r76ef94e  
    374374}
    375375
     376int devman_get_device_path(devman_handle_t handle, char *path, size_t path_size)
     377{
     378        int phone = devman_get_phone(DEVMAN_CLIENT, 0);
     379
     380        if (phone < 0)
     381                return phone;
     382
     383        async_serialize_start();
     384
     385        ipc_call_t answer;
     386        aid_t req = async_send_1(phone, DEVMAN_DEVICE_GET_DEVICE_PATH,
     387            handle, &answer);
     388
     389        ipc_call_t data_request_call;
     390        aid_t data_request = async_data_read(phone, path, path_size,
     391            &data_request_call);
     392        if (data_request == 0) {
     393                async_wait_for(req, NULL);
     394                async_serialize_end();
     395                return ENOMEM;
     396        }
     397
     398        sysarg_t data_request_rc;
     399        sysarg_t opening_request_rc;
     400        async_wait_for(data_request, &data_request_rc);
     401        async_wait_for(req, &opening_request_rc);
     402
     403        async_serialize_end();
     404
     405        if (data_request_rc != EOK) {
     406                /* Prefer the return code of the opening request. */
     407                if (opening_request_rc != EOK) {
     408                        return (int) opening_request_rc;
     409                } else {
     410                        return (int) data_request_rc;
     411                }
     412        }
     413        if (opening_request_rc != EOK) {
     414                return (int) opening_request_rc;
     415        }
     416
     417        path[path_size - 1] = 0;
     418
     419        if (IPC_GET_ARG2(data_request_call) >= path_size) {
     420                return ELIMIT;
     421        }
     422
     423        return EOK;
     424}
     425
    376426
    377427/** @}
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