mirror of
https://github.com/eclipse-threadx/threadx.git
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113 lines
5.5 KiB
C
113 lines
5.5 KiB
C
/***************************************************************************
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* Copyright (c) 2024 Microsoft Corporation
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*
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* This program and the accompanying materials are made available under the
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* terms of the MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** POSIX wrapper for THREADX */
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/** */
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/** */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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/* Include necessary system files. */
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#include "tx_api.h" /* Threadx API */
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#include "pthread.h" /* Posix API */
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#include "px_int.h" /* Posix helper functions */
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* posix_find_queue PORTABLE C */
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/* 6.1.7 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This routine returns queue descriptor indicating that name of */
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/* in the message queue.exists. */
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/* */
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/* INPUT */
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/* */
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/* const char * mq_name Name of the message queue */
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/* */
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/* OUTPUT */
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/* */
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/* q_ptr If successful */
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/* */
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/* CALLS */
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/* */
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/* None */
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/* */
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/* CALLED BY */
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/* */
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/* POSIX internal Code */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
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/* */
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/**************************************************************************/
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POSIX_MSG_QUEUE * posix_find_queue(const CHAR *mq_name)
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{
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POSIX_MSG_QUEUE *q_ptr;
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ULONG index;
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ULONG match;
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CHAR *dummy_name;
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CHAR *dummy_queue_name;
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ULONG namelength;
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q_ptr = (POSIX_MSG_QUEUE*)NULL;
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/* For checking the name. */
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for(index = 0,q_ptr = posix_queue_pool;index < POSIX_MAX_QUEUES ;index ++,q_ptr ++)
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{
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/* Assume the worst case. */
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match = TX_FALSE;
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if(q_ptr->in_use == TX_TRUE)
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{
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dummy_queue_name = q_ptr->name;
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for(namelength = 0 ,dummy_name = (CHAR *) mq_name ; namelength < PATH_MAX ;
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namelength ++, dummy_name++,dummy_queue_name ++)
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{
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/* Copy name. */
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if (*dummy_name == *dummy_queue_name)
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{
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/* End of the string. */
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if(*dummy_name == '\0')
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{
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match = TX_TRUE;
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break;
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}
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}/* Copy name. */
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else
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break;
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}
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}
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if(match==TX_TRUE)
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break;
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}
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/* For each message queue. */
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if(match==TX_TRUE)
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return(q_ptr);
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/* Returns NULL if match not found. */
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q_ptr = (POSIX_MSG_QUEUE*)NULL;
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return (q_ptr);
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}
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