83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/****************************************************************************
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* sched/module/mod_modhandle.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/module.h>
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#include <nuttx/lib/modlib.h>
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#ifdef CONFIG_MODULE
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: modhandle
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*
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* Description:
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* modhandle() returns the module handle for the installed module with the
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* provided name. A secondary use of this function is to determine if a
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* module has been loaded or not.
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*
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* Input Parameters:
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* name - A pointer to the module name string.
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*
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* Returned Value:
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* The non-NULL module handle previously returned by insmod() is returned
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* on success. If no module with that name is installed, modhandle() will
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* return a NULL handle and the errno variable will be set appropriately.
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*
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****************************************************************************/
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FAR void *modhandle(FAR const char *name)
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{
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FAR struct module_s *modp;
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DEBUGASSERT(name != NULL);
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/* Get exclusive access to the module registry */
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modlib_registry_lock();
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/* Find the module entry for this name in the registry */
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modp = modlib_registry_find(name);
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if (modp == NULL)
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{
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berr("ERROR: Failed to find module %s\n", name);
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set_errno(ENOENT);
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}
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modlib_registry_unlock();
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return (FAR void *)modp;
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}
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#endif /* CONFIG_MODULE */
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