208 lines
8.1 KiB
C
208 lines
8.1 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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#define TX_THREAD_SMP_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_suspend PORTABLE SMP */
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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 handles application suspend requests. If the suspend */
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/* requires actual processing, this function calls the actual suspend */
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/* thread routine. */
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/* */
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/* INPUT */
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/* */
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/* thread_ptr Pointer to thread to suspend */
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/* */
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/* OUTPUT */
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/* */
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/* status Return completion status */
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/* */
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/* CALLS */
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/* */
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/* _tx_thread_system_suspend Actual thread suspension */
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/* _tx_thread_system_ni_suspend Non-interruptable suspend thread */
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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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/* 09-30-2020 William E. Lamie Initial Version 6.1 */
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/* */
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/**************************************************************************/
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UINT _tx_thread_suspend(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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UINT core_index;
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/* Lockout interrupts while the thread is being suspended. */
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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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/* If trace is enabled, insert this event into the trace buffer. */
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TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_SUSPEND_API, thread_ptr, thread_ptr -> tx_thread_state, TX_POINTER_TO_ULONG_CONVERT(&status), 0, TX_TRACE_THREAD_EVENTS)
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/* Log this kernel call. */
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TX_EL_THREAD_SUSPEND_INSERT
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/* Check the specified thread's current status. */
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if (thread_ptr -> tx_thread_state == TX_READY)
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{
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/* Initialize status to success. */
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status = TX_SUCCESS;
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/* Pickup the index. */
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core_index = TX_SMP_CORE_ID;
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/* Determine if we are in a thread context. */
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if (_tx_thread_system_state[core_index] == ((ULONG) 0))
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{
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/* Yes, we are in a thread context. */
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/* Determine if the current thread is also the suspending thread. */
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if (current_thread == thread_ptr)
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{
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/* Determine if the preempt disable flag is non-zero. */
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if (_tx_thread_preempt_disable != ((UINT) 0))
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{
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/* Thread is terminated or completed. */
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status = TX_SUSPEND_ERROR;
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}
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}
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}
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/* Determine if the status is still successful. */
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if (status == TX_SUCCESS)
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{
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/* Set the state to suspended. */
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thread_ptr -> tx_thread_state = TX_SUSPENDED;
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#ifdef TX_NOT_INTERRUPTABLE
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/* Call actual non-interruptable thread suspension routine. */
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_tx_thread_system_ni_suspend(thread_ptr, ((ULONG) 0));
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/* Restore interrupts. */
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TX_RESTORE
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#else
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/* Set the suspending flag. */
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thread_ptr -> tx_thread_suspending = TX_TRUE;
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/* Setup for no timeout period. */
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thread_ptr -> tx_thread_timer.tx_timer_internal_remaining_ticks = ((ULONG) 0);
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/* Temporarily disable preemption. */
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_tx_thread_preempt_disable++;
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/* Restore interrupts. */
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TX_RESTORE
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/* Call actual thread suspension routine. */
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_tx_thread_system_suspend(thread_ptr);
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#endif
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#ifdef TX_MISRA_ENABLE
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/* Disable interrupts. */
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TX_DISABLE
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/* Return success. */
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status = TX_SUCCESS;
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#else
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/* If MISRA is not enabled, return directly. */
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return(TX_SUCCESS);
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#endif
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}
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}
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else if (thread_ptr -> tx_thread_state == TX_TERMINATED)
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{
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/* Thread is terminated. */
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status = TX_SUSPEND_ERROR;
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}
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else if (thread_ptr -> tx_thread_state == TX_COMPLETED)
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{
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/* Thread is completed. */
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status = TX_SUSPEND_ERROR;
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}
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else if (thread_ptr -> tx_thread_state == TX_SUSPENDED)
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{
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/* Already suspended, just set status to success. */
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status = TX_SUCCESS;
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}
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else
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{
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/* Just set the delayed suspension flag. */
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thread_ptr -> tx_thread_delayed_suspend = TX_TRUE;
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/* Set status to success. */
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status = TX_SUCCESS;
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}
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/* Restore interrupts. */
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TX_RESTORE
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/* Always return success, since this function does not perform error
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checking. */
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return(status);
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}
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