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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"
#include "tx_timer.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_thread_sleep PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function handles application thread sleep requests. If the */
/* sleep request was called from a non-thread, an error is returned. */
/* */
/* INPUT */
/* */
/* timer_ticks Number of timer ticks to sleep*/
/* */
/* OUTPUT */
/* */
/* status Return completion status */
/* */
/* CALLS */
/* */
/* _tx_thread_system_suspend Actual thread suspension */
/* _tx_thread_system_ni_suspend Non-interruptable suspend thread */
/* */
/* 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_sleep(ULONG timer_ticks)
{
TX_INTERRUPT_SAVE_AREA
UINT status;
TX_THREAD *thread_ptr;
/* Lockout interrupts while the thread is being resumed. */
TX_DISABLE
/* Pickup thread pointer. */
TX_THREAD_GET_CURRENT(thread_ptr)
/* Determine if this is a legal request. */
/* Is there a current thread? */
if (thread_ptr == TX_NULL)
{
/* Restore interrupts. */
TX_RESTORE
/* Illegal caller of this service. */
status = TX_CALLER_ERROR;
}
/* Is the caller an ISR or Initialization? */
else if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
{
/* Restore interrupts. */
TX_RESTORE
/* Illegal caller of this service. */
status = TX_CALLER_ERROR;
}
#ifndef TX_TIMER_PROCESS_IN_ISR
/* Is the caller the system timer thread? */
else if (thread_ptr == &_tx_timer_thread)
{
/* Restore interrupts. */
TX_RESTORE
/* Illegal caller of this service. */
status = TX_CALLER_ERROR;
}
#endif
/* Determine if the requested number of ticks is zero. */
else if (timer_ticks == ((ULONG) 0))
{
/* Restore interrupts. */
TX_RESTORE
/* Just return with a successful status. */
status = TX_SUCCESS;
}
else
{
/* Determine if the preempt disable flag is non-zero. */
if (_tx_thread_preempt_disable != ((UINT) 0))
{
/* Restore interrupts. */
TX_RESTORE
/* Suspension is not allowed if the preempt disable flag is non-zero at this point - return error completion. */
status = TX_CALLER_ERROR;
}
else
{
/* If trace is enabled, insert this event into the trace buffer. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_SLEEP, TX_ULONG_TO_POINTER_CONVERT(timer_ticks), thread_ptr -> tx_thread_state, TX_POINTER_TO_ULONG_CONVERT(&status), 0, TX_TRACE_THREAD_EVENTS)
/* Log this kernel call. */
TX_EL_THREAD_SLEEP_INSERT
/* Suspend the current thread. */
/* Set the state to suspended. */
thread_ptr -> tx_thread_state = TX_SLEEP;
#ifdef TX_NOT_INTERRUPTABLE
/* Call actual non-interruptable thread suspension routine. */
_tx_thread_system_ni_suspend(thread_ptr, timer_ticks);
/* Restore interrupts. */
TX_RESTORE
#else
/* Set the suspending flag. */
thread_ptr -> tx_thread_suspending = TX_TRUE;
/* Initialize the status to successful. */
thread_ptr -> tx_thread_suspend_status = TX_SUCCESS;
/* Setup the timeout period. */
thread_ptr -> tx_thread_timer.tx_timer_internal_remaining_ticks = timer_ticks;
/* Temporarily disable preemption. */
_tx_thread_preempt_disable++;
/* Restore interrupts. */
TX_RESTORE
/* Call actual thread suspension routine. */
_tx_thread_system_suspend(thread_ptr);
#endif
/* Return status to the caller. */
status = thread_ptr -> tx_thread_suspend_status;
}
}
/* Return completion status. */
return(status);
}