/***************************************************************************
 * Copyright (C) 2026 Eclipse ThreadX contributors
 * 
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 * 
 * AI Disclosure: This file was largely AI-generated by Codex (gpt 5.4).
 * The AI-generated portions may be considered public domain (CC0-1.0)
 * and not subject to the project's licence. The human contributor has
 * reviewed and verified that the code is correct.
 * 
 * SPDX-License-Identifier: MIT and CC0-1.0
 **************************************************************************/

/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** ThreadX Component                                                     */
/**                                                                       */
/**   Thread                                                              */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#define TX_SOURCE_CODE


/* Include necessary system files.  */

#include "tx_api.h"
#include "tx_thread.h"

#include <winbase.h>

/* Define small routines used for the TX_DISABLE/TX_RESTORE macros.  */

UINT   _tx_thread_interrupt_disable(void)
{

UINT    previous_value;


    previous_value =  _tx_thread_interrupt_control(TX_INT_DISABLE);
    return(previous_value);
}


VOID   _tx_thread_interrupt_restore(UINT previous_posture)
{

    previous_posture =  _tx_thread_interrupt_control(previous_posture);
}


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _tx_thread_interrupt_control                      Win64/MSVC      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function is responsible for changing the interrupt lockout     */
/*    posture of the system.                                              */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    new_posture                           New interrupt lockout posture */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    old_posture                           Old interrupt lockout posture */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    ExitThread                            Win32 thread exit             */
/*    GetCurrentThread                      Win32 get current thread      */
/*    GetCurrentThreadId                    Win32 get current thread ID   */
/*    GetThreadPriority                     Win32 get thread priority     */
/*    _tx_win32_critical_section_obtain     Obtain critical section       */
/*    _tx_win32_critical_section_release    Release critical section      */
/*    _tx_win32_critical_section_release_all                              */
/*                                          Release critical section      */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/**************************************************************************/
UINT   _tx_thread_interrupt_control(UINT new_posture)
{

UINT        old_posture;
HANDLE      threadhandle;
int         threadpriority;
DWORD       threadid;
TX_THREAD   *thread_ptr;


    /* Enter Win32 critical section.  */
    _tx_win32_critical_section_obtain(&_tx_win32_critical_section);

#ifdef TX_WIN32_DEBUG_ENABLE

    /* Determine if this is a disable or enable request.  */
    if (new_posture == TX_INT_ENABLE)
    {
        /* Enable.  */
        _tx_win32_debug_entry_insert("RESTORE", __FILE__, __LINE__);
    }
    else
    {
        /* Disable.  */
        _tx_win32_debug_entry_insert("DISABLE", __FILE__, __LINE__);
    }
#endif

    /* Determine if the thread was terminated.  */

    /* Pickup the handle of the current thread.  */
    threadhandle =    GetCurrentThread();

    /* Pickup the current thread pointer.  */
    thread_ptr =      _tx_thread_current_ptr;

    /* Pickup the priority of the current thread.  */
    threadpriority =  GetThreadPriority(threadhandle);

    /* Pickup the ID of the current thread.  */
    threadid =        GetCurrentThreadId();

    /* Determine if this is a thread (THREAD_PRIORITY_LOWEST) and it does not
       match the current thread pointer.  */
    if ((threadpriority == THREAD_PRIORITY_LOWEST) &&
        ((!thread_ptr) || (thread_ptr -> tx_thread_win32_thread_id != threadid)))
    {

        /* This indicates the Win32 thread was actually terminated by ThreadX is only
           being allowed to run in order to cleanup its resources.  */
        _tx_win32_critical_section_release_all(&_tx_win32_critical_section);

        /* Exit this thread.  */
        ExitThread(0);
    }

    /* Determine the current interrupt lockout condition.  */
    if (_tx_win32_critical_section.tx_win32_critical_section_nested_count == 1)
    {

        /* First pass through, interrupts are enabled.  */
        old_posture =  TX_INT_ENABLE;
    }
    else
    {

        /* Interrupts are disabled.  */
        old_posture =  TX_INT_DISABLE;
    }

    /* First, determine if this call is from a non-thread.  */
    if (_tx_thread_system_state)
    {

        /* Determine how to apply the new posture.  */
        if (new_posture == TX_INT_ENABLE)
        {

            /* Clear the disabled flag.  */
            _tx_win32_global_int_disabled_flag =  TX_FALSE;

            /* Determine if the critical section is locked.  */
            _tx_win32_critical_section_release_all(&_tx_win32_critical_section);
        }
        else if (new_posture == TX_INT_DISABLE)
        {

            /* Set the disabled flag.  */
            _tx_win32_global_int_disabled_flag =  TX_TRUE;
        }
    }
    else if (thread_ptr)
    {

        /* Determine how to apply the new posture.  */
        if (new_posture == TX_INT_ENABLE)
        {

            /* Clear the disabled flag.  */
            _tx_thread_current_ptr -> tx_thread_win32_int_disabled_flag =  TX_FALSE;

            /* Determine if the critical section is locked.  */
            _tx_win32_critical_section_release_all(&_tx_win32_critical_section);
        }
        else if (new_posture == TX_INT_DISABLE)
        {

            /* Set the disabled flag.  */
            _tx_thread_current_ptr -> tx_thread_win32_int_disabled_flag =  TX_TRUE;
        }
    }

    /* Return the previous interrupt disable posture.  */
    return(old_posture);
}