cpukit/libdrvmgr/drvmgr_func.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /* Driver Manager optional dynamic function interface
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 <drvmgr/drvmgr.h>
0030
0031 /* Get Function from Function ID */
0032 int drvmgr_func_get(void *obj, int funcid, void **func)
0033 {
0034     int objtype;
0035     struct drvmgr_func *f;
0036
0037     if (!obj)
0038         return DRVMGR_FAIL;
0039     objtype = *(int *)obj;
0040
0041     if (objtype == DRVMGR_OBJ_BUS)
0042         f = ((struct drvmgr_bus *)obj)->funcs;
0043     else if (objtype == DRVMGR_OBJ_DRV)
0044         f = ((struct drvmgr_drv *)obj)->funcs;
0045     else
0046         return DRVMGR_FAIL;
0047
0048     if (f == NULL)
0049         return DRVMGR_FAIL;
0050
0051     while (f->funcid != DRVMGR_FUNCID_NONE) {
0052         if (f->funcid == funcid) {
0053             *func = f->func;
0054             return DRVMGR_OK;
0055         }
0056         f++;
0057     }
0058
0059     return DRVMGR_FAIL;
0060 }