166 lines
7.4 KiB
C
166 lines
7.4 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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/** Thread */
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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_thread.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _tx_thread_reset 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 prepares the thread to run again from the entry */
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/* point specified during thread creation. The application must */
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/* call tx_thread_resume after this call completes for the thread */
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/* to actually run. */
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/* */
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/* INPUT */
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/* */
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/* thread_ptr Pointer to thread to reset */
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/* */
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/* OUTPUT */
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/* */
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/* status Service return status */
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/* */
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/* CALLS */
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/* */
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/* _tx_thread_stack_build Build initial thread stack */
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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_thread_reset(TX_THREAD *thread_ptr)
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{
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TX_INTERRUPT_SAVE_AREA
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TX_THREAD *current_thread;
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UINT status;
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/* Default a successful completion status. */
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status = TX_SUCCESS;
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/* Disable interrupts. */
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TX_DISABLE
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/* Pickup thread pointer. */
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TX_THREAD_GET_CURRENT(current_thread)
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/* Check for a call from the current thread, which is not allowed! */
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if (current_thread == thread_ptr)
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{
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/* Thread not completed or terminated - return an error! */
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status = TX_NOT_DONE;
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}
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else
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{
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/* Check for proper status of this thread to reset. */
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if (thread_ptr -> tx_thread_state != TX_COMPLETED)
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{
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/* Now check for terminated state. */
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if (thread_ptr -> tx_thread_state != TX_TERMINATED)
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{
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/* Thread not completed or terminated - return an error! */
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status = TX_NOT_DONE;
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}
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}
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}
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/* Is the request valid? */
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if (status == TX_SUCCESS)
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{
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/* Modify the thread status to prevent additional reset calls. */
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thread_ptr -> tx_thread_state = TX_NOT_DONE;
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/* Execute Port-Specific completion processing. If needed, it is typically defined in tx_port.h. */
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TX_THREAD_RESET_PORT_COMPLETION(thread_ptr)
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/* Restore interrupts. */
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TX_RESTORE
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#ifndef TX_DISABLE_STACK_FILLING
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/* Set the thread stack to a pattern prior to creating the initial
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stack frame. This pattern is used by the stack checking routines
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to see how much has been used. */
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TX_MEMSET(thread_ptr -> tx_thread_stack_start, ((UCHAR) TX_STACK_FILL), thread_ptr -> tx_thread_stack_size);
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#endif
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/* Call the target specific stack frame building routine to build the
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thread's initial stack and to setup the actual stack pointer in the
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control block. */
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_tx_thread_stack_build(thread_ptr, _tx_thread_shell_entry);
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/* Disable interrupts. */
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TX_DISABLE
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/* Finally, move into a suspended state to allow for the thread to be resumed. */
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thread_ptr -> tx_thread_state = TX_SUSPENDED;
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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_THREAD_RESET, thread_ptr, thread_ptr -> tx_thread_state, 0, 0, TX_TRACE_THREAD_EVENTS)
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/* Log this kernel call. */
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TX_EL_THREAD_RESET_INSERT
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/* Log the thread status change. */
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TX_EL_THREAD_STATUS_CHANGE_INSERT(thread_ptr, TX_SUSPENDED)
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}
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/* Restore interrupts. */
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TX_RESTORE
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/* Return completion status to caller. */
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return(status);
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}
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