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/**************************************************************************/
/* */
/* 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 */
/** */
/** Thread */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_trace.h"
#include "tx_thread.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_thread_reset PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function prepares the thread to run again from the entry */
/* point specified during thread creation. The application must */
/* call tx_thread_resume after this call completes for the thread */
/* to actually run. */
/* */
/* INPUT */
/* */
/* thread_ptr Pointer to thread to reset */
/* */
/* OUTPUT */
/* */
/* status Service return status */
/* */
/* CALLS */
/* */
/* _tx_thread_stack_build Build initial thread stack */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _tx_thread_reset(TX_THREAD *thread_ptr)
{
TX_INTERRUPT_SAVE_AREA
TX_THREAD *current_thread;
UINT status;
/* Default a successful completion status. */
status = TX_SUCCESS;
/* Disable interrupts. */
TX_DISABLE
/* Pickup thread pointer. */
TX_THREAD_GET_CURRENT(current_thread)
/* Check for a call from the current thread, which is not allowed! */
if (current_thread == thread_ptr)
{
/* Thread not completed or terminated - return an error! */
status = TX_NOT_DONE;
}
else
{
/* Check for proper status of this thread to reset. */
if (thread_ptr -> tx_thread_state != TX_COMPLETED)
{
/* Now check for terminated state. */
if (thread_ptr -> tx_thread_state != TX_TERMINATED)
{
/* Thread not completed or terminated - return an error! */
status = TX_NOT_DONE;
}
}
}
/* Is the request valid? */
if (status == TX_SUCCESS)
{
/* Modify the thread status to prevent additional reset calls. */
thread_ptr -> tx_thread_state = TX_NOT_DONE;
/* Execute Port-Specific completion processing. If needed, it is typically defined in tx_port.h. */
TX_THREAD_RESET_PORT_COMPLETION(thread_ptr)
/* Restore interrupts. */
TX_RESTORE
#ifndef TX_DISABLE_STACK_FILLING
/* Set the thread stack to a pattern prior to creating the initial
stack frame. This pattern is used by the stack checking routines
to see how much has been used. */
TX_MEMSET(thread_ptr -> tx_thread_stack_start, ((UCHAR) TX_STACK_FILL), thread_ptr -> tx_thread_stack_size);
#endif
/* Call the target specific stack frame building routine to build the
thread's initial stack and to setup the actual stack pointer in the
control block. */
_tx_thread_stack_build(thread_ptr, _tx_thread_shell_entry);
/* Disable interrupts. */
TX_DISABLE
/* Finally, move into a suspended state to allow for the thread to be resumed. */
thread_ptr -> tx_thread_state = TX_SUSPENDED;
/* If trace is enabled, insert this event into the trace buffer. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_RESET, thread_ptr, thread_ptr -> tx_thread_state, 0, 0, TX_TRACE_THREAD_EVENTS)
/* Log this kernel call. */
TX_EL_THREAD_RESET_INSERT
/* Log the thread status change. */
TX_EL_THREAD_STATUS_CHANGE_INSERT(thread_ptr, TX_SUSPENDED)
}
/* Restore interrupts. */
TX_RESTORE
/* Return completion status to caller. */
return(status);
}