144 lines
7.2 KiB
C
144 lines
7.2 KiB
C
/**************************************************************************/
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/* */
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/* Copyright (c) Microsoft Corporation. All rights reserved. */
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/* */
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/* This software is licensed under the Microsoft Software License */
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
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/* and in the root directory of this software. */
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/* */
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/**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** ThreadX Component */
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/** */
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/** Event Flags */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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#define TX_SOURCE_CODE
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/* Include necessary system files. */
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#include "tx_api.h"
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#include "tx_trace.h"
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#include "tx_event_flags.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _tx_event_flags_create PORTABLE C */
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/* 6.1 */
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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 function creates a group of 32 event flags. All the flags are */
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/* initially in a cleared state. */
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/* */
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/* INPUT */
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/* */
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/* group_ptr Pointer to event flags group */
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/* control block */
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/* name_ptr Pointer to event flags name */
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/* */
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/* OUTPUT */
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/* */
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/* TX_SUCCESS Successful completion status */
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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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/* Application 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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/* 05-19-2020 William E. Lamie Initial Version 6.0 */
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/* 09-30-2020 Yuxin Zhou Modified comment(s), */
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/* resulting in version 6.1 */
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/* */
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/**************************************************************************/
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UINT _tx_event_flags_create(TX_EVENT_FLAGS_GROUP *group_ptr, CHAR *name_ptr)
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{
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TX_INTERRUPT_SAVE_AREA
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TX_EVENT_FLAGS_GROUP *next_group;
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TX_EVENT_FLAGS_GROUP *previous_group;
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/* Initialize event flags control block to all zeros. */
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TX_MEMSET(group_ptr, 0, (sizeof(TX_EVENT_FLAGS_GROUP)));
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/* Setup the basic event flags group fields. */
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group_ptr -> tx_event_flags_group_name = name_ptr;
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/* Disable interrupts to put the event flags group on the created list. */
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TX_DISABLE
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/* Setup the event flags ID to make it valid. */
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group_ptr -> tx_event_flags_group_id = TX_EVENT_FLAGS_ID;
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/* Place the group on the list of created event flag groups. First,
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check for an empty list. */
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if (_tx_event_flags_created_count == TX_EMPTY)
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{
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/* The created event flags list is empty. Add event flag group to empty list. */
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_tx_event_flags_created_ptr = group_ptr;
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group_ptr -> tx_event_flags_group_created_next = group_ptr;
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group_ptr -> tx_event_flags_group_created_previous = group_ptr;
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}
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else
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{
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/* This list is not NULL, add to the end of the list. */
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next_group = _tx_event_flags_created_ptr;
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previous_group = next_group -> tx_event_flags_group_created_previous;
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/* Place the new event flag group in the list. */
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next_group -> tx_event_flags_group_created_previous = group_ptr;
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previous_group -> tx_event_flags_group_created_next = group_ptr;
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/* Setup this group's created links. */
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group_ptr -> tx_event_flags_group_created_previous = previous_group;
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group_ptr -> tx_event_flags_group_created_next = next_group;
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}
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/* Increment the number of created event flag groups. */
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_tx_event_flags_created_count++;
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/* Optional event flag group create extended processing. */
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TX_EVENT_FLAGS_GROUP_CREATE_EXTENSION(group_ptr)
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/* If trace is enabled, register this object. */
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TX_TRACE_OBJECT_REGISTER(TX_TRACE_OBJECT_TYPE_EVENT_FLAGS, group_ptr, name_ptr, 0, 0)
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/* If trace is enabled, insert this event into the trace buffer. */
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TX_TRACE_IN_LINE_INSERT(TX_TRACE_EVENT_FLAGS_CREATE, group_ptr, TX_POINTER_TO_ULONG_CONVERT(&next_group), 0, 0, TX_TRACE_EVENT_FLAGS_EVENTS)
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/* Log this kernel call. */
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TX_EL_EVENT_FLAGS_CREATE_INSERT
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/* Restore interrupts. */
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TX_RESTORE
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/* Return TX_SUCCESS. */
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return(TX_SUCCESS);
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}
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