97 lines
3.4 KiB
C
97 lines
3.4 KiB
C
/****************************************************************************
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* sched/module/mod_modhandle.c
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <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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