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common_modules/module_manager/src/txm_module_manager_thread_reset.c
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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 */
/** */
/** Module Manager */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
#include "tx_api.h"
#include "tx_trace.h"
#include "tx_thread.h"
#include "txm_module.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txm_module_manager_thread_reset PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Scott Larson, 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 */
/* */
/* _txm_module_manager_thread_stack_build Build initial thread */
/* stack */
/* */
/* CALLED BY */
/* */
/* _txm_module_manager_kernel_dispatch Kernel dispatch function */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 09-30-2020 Scott Larson Initial Version 6.1 */
/* */
/**************************************************************************/
UINT _txm_module_manager_thread_reset(TX_THREAD *thread_ptr)
{
TX_INTERRUPT_SAVE_AREA
TX_THREAD *current_thread;
UINT status;
TXM_MODULE_INSTANCE *module_instance;
TXM_MODULE_THREAD_ENTRY_INFO *thread_entry_info;
/* 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)
{
/* Restore interrupts. */
TX_RESTORE
/* 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;
/* Get the module instance. */
module_instance = thread_ptr -> tx_thread_module_instance_ptr;
/* Execute Port-Specific completion processing. If needed, it is typically defined in txm_module_port.h. */
TXM_MODULE_MANAGER_THREAD_RESET_PORT_COMPLETION(thread_ptr, module_instance)
/* 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
/* Setup pointer to the thread entry information structure, which will live at the top of each
module thread's stack. This will allow the module thread entry function to avoid direct
access to the actual thread control block. */
thread_entry_info = (TXM_MODULE_THREAD_ENTRY_INFO *) (((UCHAR *) thread_ptr -> tx_thread_stack_end) + (2*sizeof(ULONG)) + 1);
thread_entry_info = (TXM_MODULE_THREAD_ENTRY_INFO *) (((ALIGN_TYPE)(thread_entry_info)) & (~0x3));
/* Place the thread entry information pointer in the thread control block so it can be picked up
in the following stack build function. This is supplied to the module's shell entry function
to avoid direct access to the actual thread control block. Note that this is overwritten
with the actual stack pointer at the end of stack build. */
thread_ptr -> tx_thread_stack_ptr = (VOID *) thread_entry_info;
/* 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. */
_txm_module_manager_thread_stack_build(thread_ptr, module_instance -> txm_module_instance_shell_entry_function);
/* 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);
}