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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present 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.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
// Some portions generated by Codex (gpt 5.4).
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Initialize */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#pragma comment (lib, "Winmm.lib")
/* Define various Win32 objects used by the ThreadX port. */
TX_WIN32_CRITICAL_SECTION _tx_win32_critical_section;
HANDLE _tx_win32_scheduler_semaphore;
DWORD _tx_win32_scheduler_id;
ULONG _tx_win32_global_int_disabled_flag;
LARGE_INTEGER _tx_win32_time_stamp;
ULONG _tx_win32_system_error;
extern TX_THREAD *_tx_thread_current_ptr;
/* Define simulated timer interrupt. This is done inside a thread, which is
how other interrupts may be defined as well. See code below for an
example. */
UINT _tx_win32_timer_id;
VOID CALLBACK _tx_win32_timer_interrupt(UINT wTimerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2);
#ifdef TX_WIN32_DEBUG_ENABLE
extern ULONG _tx_thread_system_state;
extern UINT _tx_thread_preempt_disable;
extern TX_THREAD *_tx_thread_current_ptr;
extern TX_THREAD *_tx_thread_execute_ptr;
/* Define the maximum size of the Win32 debug array. */
#ifndef TX_WIN32_DEBUG_EVENT_SIZE
#define TX_WIN32_DEBUG_EVENT_SIZE 400
#endif
/* Define debug log in order to debug Win32 issues with this port. */
typedef struct TX_WIN32_DEBUG_ENTRY_STRUCT
{
char *tx_win32_debug_entry_action;
LARGE_INTEGER tx_win32_debug_entry_timestamp;
char *tx_win32_debug_entry_file;
unsigned long tx_win32_debug_entry_line;
TX_WIN32_CRITICAL_SECTION tx_win32_debug_entry_critical_section;
unsigned long tx_win32_debug_entry_int_disabled_flag;
ULONG tx_win32_debug_entry_system_state;
UINT tx_win32_debug_entry_preempt_disable;
TX_THREAD *tx_win32_debug_entry_current_thread;
DWORD tx_win32_debug_entry_current_thread_id;
TX_THREAD *tx_win32_debug_entry_execute_thread;
DWORD tx_win32_debug_entry_execute_thread_id;
DWORD tx_win32_debug_entry_running_id;
} TX_WIN32_DEBUG_ENTRY;
/* Define the circular array of Win32 debug entries. */
TX_WIN32_DEBUG_ENTRY _tx_win32_debug_entry_array[TX_WIN32_DEBUG_EVENT_SIZE];
/* Define the Win32 debug index. */
unsigned long _tx_win32_debug_entry_index = 0;
/* Now define the debug entry function. */
void _tx_win32_debug_entry_insert(char *action, char *file, unsigned long line)
{
/* Get the time stamp. */
QueryPerformanceCounter((LARGE_INTEGER *)&_tx_win32_time_stamp);
/* Setup the debug entry. */
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_action = action;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_timestamp = _tx_win32_time_stamp;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_file = file;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_line = line;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_critical_section = _tx_win32_critical_section;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_int_disabled_flag = _tx_win32_global_int_disabled_flag;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_system_state = _tx_thread_system_state;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_preempt_disable = _tx_thread_preempt_disable;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_current_thread = _tx_thread_current_ptr;
if (_tx_thread_current_ptr)
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_current_thread_id = _tx_thread_current_ptr -> tx_thread_win32_thread_id;
else
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_current_thread_id = 0;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_execute_thread = _tx_thread_execute_ptr;
if (_tx_thread_execute_ptr)
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_execute_thread_id = _tx_thread_execute_ptr -> tx_thread_win32_thread_id;
else
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_execute_thread_id = 0;
_tx_win32_debug_entry_array[_tx_win32_debug_entry_index].tx_win32_debug_entry_running_id = GetCurrentThreadId();
/* Now move to the next entry. */
_tx_win32_debug_entry_index++;
/* Determine if we need to wrap the list. */
if (_tx_win32_debug_entry_index >= TX_WIN32_DEBUG_EVENT_SIZE)
{
/* Yes, wrap the list! */
_tx_win32_debug_entry_index = 0;
}
}
#endif
/* Define the ThreadX timer interrupt handler. */
void _tx_timer_interrupt(void);
/* Define other external function references. */
VOID _tx_initialize_low_level(VOID);
VOID _tx_thread_context_save(VOID);
VOID _tx_thread_context_restore(VOID);
/* Define other external variable references. */
extern VOID *_tx_initialize_unused_memory;
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_initialize_low_level Win32/Visual */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is responsible for any low-level processor */
/* initialization, including setting up interrupt vectors, setting */
/* up a periodic timer interrupt source, saving the system stack */
/* pointer for use in ISR processing later, and finding the first */
/* available RAM memory address for tx_application_define. */
/* */
/* INPUT */
/* */
/* None */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* CreateMutex Win32 create mutex */
/* CreateThread Win32 create thread */
/* CreateSemaphore Win32 create semaphore */
/* GetCurrentThreadId Win32 get current thread ID */
/* SetProcessAffinityMask Win32 process affinity set */
/* SetThreadPriority Win32 set thread priority */
/* */
/* CALLED BY */
/* */
/* _tx_initialize_kernel_enter ThreadX entry function */
/* */
/**************************************************************************/
VOID _tx_initialize_low_level(VOID)
{
/* Deprecate TX_WIN32_MULTI_CORE build option and default to restricting
execution to one core. */
#ifndef TX_WIN32_BYPASS_AFFINITY_SETUP
/* Limit this ThreadX simulation on Win32 to a single core. */
if (SetProcessAffinityMask( GetCurrentProcess(), 1 ) == 0)
{
/* Error restricting the process to one core. */
printf("ThreadX Win32 error restricting the process to one core!\n");
while(1)
{
}
}
#endif
/* Pickup the first available memory address. */
/* Save the first available memory address. */
_tx_initialize_unused_memory = malloc(TX_WIN32_MEMORY_SIZE);
/* Pickup the unique Id of the current thread, which will also be the Id of the scheduler. */
_tx_win32_scheduler_id = GetCurrentThreadId();
/* Create the system critical section mutex. This is used by the system to block all other access,
analogous to an interrupt lockout on an embedded target. */
_tx_win32_critical_section.tx_win32_critical_section_mutex_handle = CreateMutex(NULL, FALSE, NULL);
_tx_win32_critical_section.tx_win32_critical_section_nested_count = 0;
_tx_win32_critical_section.tx_win32_critical_section_owner = 0;
/* Create the semaphore that regulates when the scheduler executes. */
_tx_win32_scheduler_semaphore = CreateSemaphore(NULL, 0, 1, NULL);
/* Initialize the global interrupt disabled flag. */
_tx_win32_global_int_disabled_flag = TX_FALSE;
/* Done, return to caller. */
}
/* This routine is called after initialization is complete in order to start
all interrupt threads. Interrupt threads in addition to the timer may
be added to this routine as well. */
void _tx_initialize_start_interrupts(void)
{
TIMECAPS tc;
UINT wTimerRes;
/* Queries the timer device to determine its resolution. */
if (timeGetDevCaps(&tc, sizeof(TIMECAPS)) != TIMERR_NOERROR)
{
/* Error; application can't continue. */
printf("Query timer device error.");
while (1)
{
}
}
wTimerRes = min(max(tc.wPeriodMin, TX_TIMER_PERIODIC), tc.wPeriodMax);
/* Start a specified timer event. The timer runs in its own thread.
It calls the specified callback function when the event is activated. */
_tx_win32_timer_id = timeSetEvent(TX_TIMER_PERIODIC, wTimerRes, _tx_win32_timer_interrupt, 0, TIME_PERIODIC);
}
/* Define the ThreadX system timer interrupt. Other interrupts may be simulated
in a similar way. */
VOID CALLBACK _tx_win32_timer_interrupt(UINT wTimerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
{
/* Call ThreadX context save for interrupt preparation. */
_tx_thread_context_save();
/* Call the ThreadX system timer interrupt processing. */
_tx_timer_interrupt();
/* Call ThreadX context restore for interrupt completion. */
_tx_thread_context_restore();
}
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