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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_send PORTABLE C */
/* 6.1.7 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* The mq_send() function puts a message of size msg_len and pointed to*/
/* by msg_ptr into the queue indicated by mqdes. The new message has a */
/* priority of msg_prio. */
/* The queue maintained is in priority order (priorities may range from*/
/* 0 to MQ_PRIO_MAX), and in FIFO order within the same priority. */
/* */
/* INPUT */
/* */
/* mqdes Queue descriptor */
/* msg_ptr Message pointer */
/* msg_len length of message */
/* msg_prio Priority of the message */
/* */
/* OUTPUT */
/* */
/* OK no of bytes received */
/* ERROR If error occurs */
/* */
/* CALLS */
/* */
/* tx_thread_identify returns currently running thread */
/* tx_byte_allocate allocate memory */
/* tx_queue_send ThreadX queue send */
/* posix_priority_search search message for same priority */
/* */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
INT mq_send( mqd_t mqdes, const CHAR * msg_ptr, size_t msg_len,
ULONG msg_prio )
{
TX_QUEUE *Queue;
UINT temp1;
POSIX_MSG_QUEUE *q_ptr;
VOID *bp;
UCHAR *source;
UCHAR *destination;
UCHAR *save_ptr;
ULONG mycount;
ULONG msg[TX_POSIX_MESSAGE_SIZE];
/* Assign a temporary variable for clarity. */
Queue = &(mqdes->f_data->queue);
q_ptr = (POSIX_MSG_QUEUE * )mqdes->f_data;
/* First, check for an invalid queue pointer. */
if ( (!q_ptr) || ( (q_ptr -> px_queue_id) != PX_QUEUE_ID))
{
/* Queue pointer is invalid, return appropriate error code. */
posix_errno = EBADF;
posix_set_pthread_errno(EBADF);
/* Return ERROR. */
return(ERROR);
}
/* Make sure if we're calling this routine from a ISR timeout
is set to zero. */
if (!(tx_thread_identify()))
{
/* POSIX doesn't have error for this, hence give default. */
posix_errno = EINTR ;
posix_set_pthread_errno(EINTR);
/* Return ERROR. */
return(ERROR);
}
/* First, check for an invalid queue pointer. */
if ( (!q_ptr) || ( (q_ptr->queue.tx_queue_id) != TX_QUEUE_ID))
{
/* Queue descriptor is invalid, set appropriate error code. */
posix_errno = EBADF ;
posix_set_pthread_errno(EBADF);
/* Return ERROR. */
return(ERROR);
}
if(((mqdes->f_flag & O_WRONLY) != O_WRONLY) && ((mqdes->f_flag & O_RDWR) != O_RDWR))
{
/* Queue pointer is invalid, return appropriate error code. */
posix_errno = EBADF;
posix_set_pthread_errno(EBADF);
/* Return ERROR. */
return(ERROR);
}
if( msg_prio > MQ_PRIO_MAX)
{
/* Return appropriate error. */
posix_errno = EINVAL;
posix_set_pthread_errno(EINVAL);
/* Return error. */
return(ERROR);
}
/* Check for an invalid source for message. */
if (! msg_ptr)
{
/* POSIX doesn't have error for this, hence give default. */
posix_errno = EINTR ;
posix_set_pthread_errno(EINTR);
/* Return ERROR. */
return(ERROR);
}
/* Now check the length of message. */
if ( msg_len > (q_ptr->q_attr.mq_msgsize ) )
{
/* Return message length exceeds max length. */
posix_errno = EMSGSIZE ;
posix_set_pthread_errno(EMSGSIZE);
/* Return ERROR. */
return(ERROR);
}
/* Now try to allocate memory to save the message from the
queue's byte pool. */
temp1 = tx_byte_allocate((TX_BYTE_POOL * )&(q_ptr->vq_message_area), &bp,
msg_len, TX_NO_WAIT);
if (temp1 != TX_SUCCESS)
{
posix_internal_error(9999);
}
/* Got the memory , Setup source and destination pointers
Cast them in UCHAR as message length is in bytes. */
source = (UCHAR * ) msg_ptr;
destination = (UCHAR * ) bp;
/* Save start of message storage. */
save_ptr = destination;
/* Copy the message into private buffer. */
for ( mycount = 0; mycount < msg_len; mycount++)
{
* destination++ = * source++;
}
/* Restore the pointer of save message. */
source = save_ptr ;
/* Create message that holds saved message pointer and message length. */
#ifdef TX_64_BIT
msg[0] = (ULONG)((ALIGN_TYPE)source >> 32);
msg[1] = (ULONG)((ALIGN_TYPE)source);
msg[2] = msg_len;
msg[3] = msg_prio;
msg[4] = posix_priority_search(mqdes, msg_prio);
#else
msg[0] = (ULONG)source;
msg[1] = msg_len;
msg[2] = msg_prio;
msg[3] = posix_priority_search(mqdes, msg_prio);
#endif
/* Attempt to post the message to the queue. */
temp1 = tx_queue_send(Queue, msg, TX_WAIT_FOREVER);
if ( temp1 != TX_SUCCESS)
{
/* POSIX doesn't have error for this, hence give default. */
posix_errno = EINTR ;
posix_set_pthread_errno(EINTR);
/* Return ERROR. */
return(ERROR);
}
/* All done. */
return(OK);
}
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