diff options
Diffstat (limited to 'nuttx/sched/mq_findnamed.c')
-rw-r--r-- | nuttx/sched/mq_findnamed.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/nuttx/sched/mq_findnamed.c b/nuttx/sched/mq_findnamed.c new file mode 100644 index 000000000..d23b81c5e --- /dev/null +++ b/nuttx/sched/mq_findnamed.c @@ -0,0 +1,105 @@ +/************************************************************************ + * sched/mq_findnamed.c + * + * Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include <nuttx/config.h> + +#include <string.h> + +#include "mq_internal.h" + +/************************************************************************ + * Definitions + ************************************************************************/ + +/************************************************************************ + * Private Type Declarations + ************************************************************************/ + +/************************************************************************ + * Global Variables + ************************************************************************/ + +/************************************************************************ + * Private Variables + ************************************************************************/ + +/************************************************************************ + * Private Functions + ************************************************************************/ + +/************************************************************************ + * Public Functions + ************************************************************************/ + +/************************************************************************ + * Name: mq_findnamed + * + * Description: + * This function finds the named message queue with the specified name + * in the list of message queues. + * + * Inputs: + * mq_name - the name of the message queue to find + * + * Return Value: + * A reference to the matching named message queue structure (or NULL + * if none was found). + * + ************************************************************************/ + +FAR msgq_t *mq_findnamed(const char *mq_name) +{ + FAR msgq_t *msgq; + + /* Search the list of named message queues */ + + for (msgq = (FAR msgq_t*)g_msgqueues.head; (msgq); msgq = msgq->flink) + { + /* Break out of the lloop with a non-NULL msgq if the + * name matches. + */ + + if (!strcmp(mq_name, msgq->name)) + { + break; + } + } + + return msgq; +} |