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/**
* @file lv_windows.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_os.h"
#if LV_USE_OS == LV_OS_WINDOWS
#include <process.h>
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
typedef struct {
void (*callback)(void *);
void * user_data;
} lv_thread_init_data_t;
/**********************
* STATIC PROTOTYPES
**********************/
static unsigned __stdcall thread_start_routine(void * parameter);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_result_t lv_thread_init(
lv_thread_t * thread,
lv_thread_prio_t prio,
void (*callback)(void *),
size_t stack_size,
void * user_data)
{
if(!thread) {
return LV_RESULT_INVALID;
}
static const int prio_map[] = {
[LV_THREAD_PRIO_LOWEST] = THREAD_PRIORITY_LOWEST,
[LV_THREAD_PRIO_LOW] = THREAD_PRIORITY_BELOW_NORMAL,
[LV_THREAD_PRIO_MID] = THREAD_PRIORITY_NORMAL,
[LV_THREAD_PRIO_HIGH] = THREAD_PRIORITY_ABOVE_NORMAL,
[LV_THREAD_PRIO_HIGHEST] = THREAD_PRIORITY_HIGHEST,
};
lv_thread_init_data_t * init_data =
(lv_thread_init_data_t *)(malloc(
sizeof(lv_thread_init_data_t)));
if(!init_data) {
return LV_RESULT_INVALID;
}
init_data->callback = callback;
init_data->user_data = user_data;
/*
Reference: https://learn.microsoft.com/en-us/windows/win32/api
/processthreadsapi/nf-processthreadsapi-createthread
A thread in an executable that calls the C run-time library (CRT) should
use the _beginthreadex and _endthreadex functions for thread management
rather than CreateThread and ExitThread; this requires the use of the
multithreaded version of the CRT. If a thread created using CreateThread
calls the CRT, the CRT may terminate the process in low-memory conditions.
*/
*thread = (HANDLE)(_beginthreadex(
NULL,
(unsigned)(stack_size),
thread_start_routine,
init_data,
0,
NULL));
if(!*thread) {
return LV_RESULT_INVALID;
}
/*
Try to set the thread priority. (Not mandatory for creating a new thread.)
*/
SetThreadPriority(*thread, prio_map[prio]);
return LV_RESULT_OK;
}
lv_result_t lv_thread_delete(lv_thread_t * thread)
{
lv_result_t result = LV_RESULT_OK;
if(!TerminateThread(thread, 0)) {
result = LV_RESULT_INVALID;
}
CloseHandle(thread);
return result;
}
lv_result_t lv_mutex_init(lv_mutex_t * mutex)
{
InitializeCriticalSection(mutex);
return LV_RESULT_OK;
}
lv_result_t lv_mutex_lock(lv_mutex_t * mutex)
{
EnterCriticalSection(mutex);
return LV_RESULT_OK;
}
lv_result_t lv_mutex_lock_isr(lv_mutex_t * mutex)
{
EnterCriticalSection(mutex);
return LV_RESULT_OK;
}
lv_result_t lv_mutex_unlock(lv_mutex_t * mutex)
{
LeaveCriticalSection(mutex);
return LV_RESULT_OK;
}
lv_result_t lv_mutex_delete(lv_mutex_t * mutex)
{
DeleteCriticalSection(mutex);
return LV_RESULT_OK;
}
lv_result_t lv_thread_sync_init(lv_thread_sync_t * sync)
{
if(!sync) {
return LV_RESULT_INVALID;
}
InitializeCriticalSection(&sync->cs);
InitializeConditionVariable(&sync->cv);
sync->v = false;
return LV_RESULT_OK;
}
lv_result_t lv_thread_sync_wait(lv_thread_sync_t * sync)
{
if(!sync) {
return LV_RESULT_INVALID;
}
EnterCriticalSection(&sync->cs);
while(!sync->v) {
SleepConditionVariableCS(&sync->cv, &sync->cs, INFINITE);
}
sync->v = false;
LeaveCriticalSection(&sync->cs);
return LV_RESULT_OK;
}
lv_result_t lv_thread_sync_signal(lv_thread_sync_t * sync)
{
if(!sync) {
return LV_RESULT_INVALID;
}
EnterCriticalSection(&sync->cs);
sync->v = true;
WakeConditionVariable(&sync->cv);
LeaveCriticalSection(&sync->cs);
return LV_RESULT_OK;
}
lv_result_t lv_thread_sync_delete(lv_thread_sync_t * sync)
{
if(!sync) {
return LV_RESULT_INVALID;
}
DeleteCriticalSection(&sync->cs);
return LV_RESULT_OK;
}
lv_result_t lv_thread_sync_signal_isr(lv_thread_sync_t * sync)
{
LV_UNUSED(sync);
return LV_RESULT_INVALID;
}
/**********************
* STATIC FUNCTIONS
**********************/
static unsigned __stdcall thread_start_routine(void * parameter)
{
lv_thread_init_data_t * init_data = (lv_thread_init_data_t *)(parameter);
if(init_data) {
init_data->callback(init_data->user_data);
free(init_data);
}
return 0;
}
#endif /*LV_USE_OS == LV_OS_WINDOWS*/
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