cpukit/libdrvmgr/drvmgr_by_name.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /* Find driver by driver-name
0004  *
0005  * COPYRIGHT (c) 2011 Cobham Gaisler AB.
0006  *
0007  * Redistribution and use in source and binary forms, with or without
0008  * modification, are permitted provided that the following conditions
0009  * are met:
0010  * 1. Redistributions of source code must retain the above copyright
0011  *    notice, this list of conditions and the following disclaimer.
0012  * 2. Redistributions in binary form must reproduce the above copyright
0013  *    notice, this list of conditions and the following disclaimer in the
0014  *    documentation and/or other materials provided with the distribution.
0015  *
0016  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0017  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0018  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0019  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0020  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0021  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0022  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0023  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0024  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0025  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0026  * POSSIBILITY OF SUCH DAMAGE.
0027  */
0028
0029 #include <string.h>
0030 #include <drvmgr/drvmgr.h>
0031 #include "drvmgr_internal.h"
0032
0033 /* Get driver from driver name */
0034 struct drvmgr_drv *drvmgr_drv_by_name(const char *name)
0035 {
0036     struct drvmgr *mgr = &drvmgr;
0037     struct drvmgr_drv *drv = NULL;
0038
0039     if (!name)
0040         return NULL;
0041
0042     /* NOTE: No locking is needed here since Driver list is supposed to be
0043      *       initialized once during startup, we treat it as a static
0044      *       read-only list
0045      */
0046
0047     drv = DRV_LIST_HEAD(&mgr->drivers);
0048     while (drv) {
0049         if (drv->name && (strcmp(drv->name, name) == 0))
0050             break;
0051         drv = drv->next;
0052     }
0053
0054     return drv;
0055 }