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Diffstat (limited to 'common/src/txe_queue_create.c')
| -rw-r--r-- | common/src/txe_queue_create.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/common/src/txe_queue_create.c b/common/src/txe_queue_create.c new file mode 100644 index 00000000..006386f3 --- /dev/null +++ b/common/src/txe_queue_create.c @@ -0,0 +1,237 @@ +/**************************************************************************/ +/* */ +/* Copyright (c) Microsoft Corporation. All rights reserved. */ +/* */ +/* This software is licensed under the Microsoft Software License */ +/* Terms for Microsoft Azure RTOS. Full text of the license can be */ +/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ +/* and in the root directory of this software. */ +/* */ +/**************************************************************************/ + + +/**************************************************************************/ +/**************************************************************************/ +/** */ +/** ThreadX Component */ +/** */ +/** Queue */ +/** */ +/**************************************************************************/ +/**************************************************************************/ + +#define TX_SOURCE_CODE + + +/* Include necessary system files. */ + +#include "tx_api.h" +#include "tx_initialize.h" +#include "tx_timer.h" +#include "tx_thread.h" +#include "tx_queue.h" + + +/**************************************************************************/ +/* */ +/* FUNCTION RELEASE */ +/* */ +/* _txe_queue_create PORTABLE C */ +/* 6.0 */ +/* AUTHOR */ +/* */ +/* William E. Lamie, Microsoft Corporation */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function checks for errors in the queue create function call. */ +/* */ +/* INPUT */ +/* */ +/* queue_ptr Pointer to queue control block */ +/* name_ptr Pointer to queue name */ +/* message_size Size of each queue message */ +/* queue_start Starting address of the queue area*/ +/* queue_size Number of bytes in the queue */ +/* queue_control_block_size Size of queue control block */ +/* */ +/* OUTPUT */ +/* */ +/* TX_QUEUE_ERROR Invalid queue pointer */ +/* TX_PTR_ERROR Invalid starting address of queue */ +/* TX_SIZE_ERROR Invalid message queue size */ +/* status Actual completion status */ +/* */ +/* CALLS */ +/* */ +/* _tx_queue_create Actual queue create function */ +/* _tx_thread_system_preempt_check Check for preemption */ +/* */ +/* CALLED BY */ +/* */ +/* Application Code */ +/* */ +/* RELEASE HISTORY */ +/* */ +/* DATE NAME DESCRIPTION */ +/* */ +/* 05-19-2020 William E. Lamie Initial Version 6.0 */ +/* */ +/**************************************************************************/ +UINT _txe_queue_create(TX_QUEUE *queue_ptr, CHAR *name_ptr, UINT message_size, + VOID *queue_start, ULONG queue_size, UINT queue_control_block_size) +{ + +TX_INTERRUPT_SAVE_AREA + +UINT status; +ULONG i; +TX_QUEUE *next_queue; +#ifndef TX_TIMER_PROCESS_IN_ISR +TX_THREAD *thread_ptr; +#endif + + + /* Default status to success. */ + status = TX_SUCCESS; + + /* Check for an invalid queue pointer. */ + if (queue_ptr == TX_NULL) + { + + /* Queue pointer is invalid, return appropriate error code. */ + status = TX_QUEUE_ERROR; + } + + /* Now check for a valid control block size. */ + else if (queue_control_block_size != (sizeof(TX_QUEUE))) + { + + /* Queue pointer is invalid, return appropriate error code. */ + status = TX_QUEUE_ERROR; + } + else + { + + /* Disable interrupts. */ + TX_DISABLE + + /* Increment the preempt disable flag. */ + _tx_thread_preempt_disable++; + + /* Restore interrupts. */ + TX_RESTORE + + /* Next see if it is already in the created list. */ + next_queue = _tx_queue_created_ptr; + for (i = ((ULONG) 0); i < _tx_queue_created_count; i++) + { + + /* Determine if this queue matches the queue in the list. */ + if (queue_ptr == next_queue) + { + + break; + } + else + { + + /* Move to the next queue. */ + next_queue = next_queue -> tx_queue_created_next; + } + } + + /* Disable interrupts. */ + TX_DISABLE + + /* Decrement the preempt disable flag. */ + _tx_thread_preempt_disable--; + + /* Restore interrupts. */ + TX_RESTORE + + /* Check for preemption. */ + _tx_thread_system_preempt_check(); + + /* At this point, check to see if there is a duplicate queue. */ + if (queue_ptr == next_queue) + { + + /* Queue is already created, return appropriate error code. */ + status = TX_QUEUE_ERROR; + } + + /* Check the starting address of the queue. */ + else if (queue_start == TX_NULL) + { + + /* Invalid starting address of queue. */ + status = TX_PTR_ERROR; + } + + /* Check for an invalid message size - less than 1. */ + else if (message_size < TX_1_ULONG) + { + + /* Invalid message size specified. */ + status = TX_SIZE_ERROR; + } + + /* Check for an invalid message size - greater than 16. */ + else if (message_size > TX_16_ULONG) + { + + /* Invalid message size specified. */ + status = TX_SIZE_ERROR; + } + + /* Check on the queue size. */ + else if ((queue_size/(sizeof(ULONG))) < message_size) + { + + /* Invalid queue size specified. */ + status = TX_SIZE_ERROR; + } + else + { + +#ifndef TX_TIMER_PROCESS_IN_ISR + + /* Pickup thread pointer. */ + TX_THREAD_GET_CURRENT(thread_ptr) + + /* Check for invalid caller of this function. First check for a calling thread. */ + if (thread_ptr == &_tx_timer_thread) + { + + /* Invalid caller of this function, return appropriate error code. */ + status = TX_CALLER_ERROR; + } +#endif + + /* Check for interrupt call. */ + if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0)) + { + + /* Now, make sure the call is from an interrupt and not initialization. */ + if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS) + { + + /* Invalid caller of this function, return appropriate error code. */ + status = TX_CALLER_ERROR; + } + } + } + } + + /* Determine if everything is okay. */ + if (status == TX_SUCCESS) + { + + /* Call actual queue create function. */ + status = _tx_queue_create(queue_ptr, name_ptr, message_size, queue_start, queue_size); + } + + /* Return completion status. */ + return(status); +} |