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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** POSIX wrapper for THREADX */
/** */
/** */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#include "tx_api.h" /* Threadx API */
#include "pthread.h" /* Posix API */
#include "px_int.h" /* Posix helper functions */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* mq_unlink PORTABLE C */
/* 6.1.7 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This routine removes the named message queue */
/* */
/* INPUT */
/* */
/* const CHAR * mqName Message Queue name. */
/* */
/* OUTPUT */
/* */
/* OK If successful */
/* ERROR IF fails */
/* */
/* CALLS */
/* */
/* posix_internal_error Generic error handler */
/* posix_find_queue Finds the required queue */
/* posix_queue_delete Deletes specific queue */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
INT mq_unlink(const CHAR * mqName)
{
POSIX_MSG_QUEUE *q_ptr;
ULONG len;
ULONG temp1;
/* Checking for the invalid length. */
len = strlen(mqName);
if(len > 10)
{
/* Return appropriate error. */
posix_errno = ENAMETOOLONG;
posix_set_pthread_errno(ENAMETOOLONG);
/* Return Error. */
return(ERROR);
}
/* For checking the name. */
if(!(q_ptr = posix_find_queue(mqName)))
{
/* Set Posix error if name exist. */
posix_errno = EEXIST;
posix_set_pthread_errno(EEXIST);
/* Return error. */
return(ERROR);
}
if(q_ptr)
/* Unlinks the message Queue. */
q_ptr->unlink_flag = TX_TRUE;
/* check if the message queue is not open in any task. */
if(q_ptr->open_count == 0)
{
/* Free the system resource allocated by open call. */
temp1 = posix_queue_delete( q_ptr );
if( temp1 != TX_SUCCESS)
{
/*. Return generic error. */
posix_internal_error(100);
/* Return error. */
return(ERROR);
}
}
return(OK);
}
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