/** 初始化帧数控制 */
void FrameControl_Init( FrameCtrlCtx *ctx )
{
ctx->temp_fps = 0;
ctx->current_fps = 0;
ctx->pause_time = 0;
ctx->one_frame_remain_time = 10;
ctx->prev_frame_start_time = LCUI_GetTickCount();
ctx->prev_fps_update_time = LCUI_GetTickCount();
LCUISleeper_Create( &ctx->wait_continue );
LCUISleeper_Create( &ctx->wait_pause );
}
/** 新建帧数控制实例 */
FrameCtrlCtx FrameControl_Create( void )
{
FrameCtrlCtx ctx;
ctx = (FrameCtrlCtx)malloc(sizeof(struct FrameControlContext));
ctx->temp_fps = 0;
ctx->current_fps = 0;
ctx->pause_time = 0;
ctx->one_frame_remain_time = 10;
ctx->prev_frame_start_time = LCUI_GetTickCount();
ctx->prev_fps_update_time = LCUI_GetTickCount();
LCUICond_Init( &ctx->wait_continue );
LCUICond_Init( &ctx->wait_pause );
LCUIMutex_Init( &ctx->mutex );
LCUIMutex_Lock( &ctx->mutex );
return ctx;
}
LCUI_API int64_t LCUI_GetTicks( int64_t start_ticks )
{
int64_t now_ticks;
now_ticks = LCUI_GetTickCount();
if ( now_ticks < start_ticks ) {
return (TIME_WRAP_VALUE-start_ticks) + now_ticks;
}
return now_ticks - start_ticks;
}
/** 让当前帧停留一定时间 */
void FrameControl_Remain( FrameCtrlCtx ctx )
{
unsigned int n_ms, lost_ms;
int64_t current_time;
if( ctx->state == FRAME_CTRL_STATE_QUIT ) {
return;
}
current_time = LCUI_GetTickCount();
n_ms = (int)(current_time - ctx->prev_frame_start_time);
if( n_ms > ctx->one_frame_remain_time ) {
goto normal_exit;
}
n_ms = ctx->one_frame_remain_time - n_ms;
if( n_ms < 1 ) {
goto normal_exit;
}
/* 进行睡眠，直到需要暂停为止 */
LCUICond_TimedWait( &ctx->wait_pause, &ctx->mutex, n_ms );
/* 睡眠结束后，如果当前状态不为PAUSE，则说明睡眠不是因为要暂停而终止的 */
if( ctx->state != FRAME_CTRL_STATE_PAUSE ) {
goto normal_exit;
}
current_time = LCUI_GetTickCount();
/* 需要暂停，进行睡眠，直到需要继续为止 */
LCUICond_Wait( &ctx->wait_continue, &ctx->mutex );
lost_ms = (unsigned int)LCUI_GetTicks( current_time );
ctx->pause_time = lost_ms;
ctx->prev_frame_start_time += lost_ms;
return;
normal_exit:;
current_time = LCUI_GetTickCount();
if( current_time - ctx->prev_fps_update_time >= 1000 ) {
ctx->current_fps = ctx->temp_fps;
ctx->prev_fps_update_time = current_time;
ctx->temp_fps = 0;
}
ctx->prev_frame_start_time = current_time;
++ctx->temp_fps;
}
/**
* 暂停定时器的倒计时
* 一般用于往复定时的定时器
* @param timer_id
* 目标定时器的标识符
* @return
* 正常返回0，指定ID的定时器不存在则返回-1.
* */
LCUI_API int LCUITimer_Pause( int timer_id )
{
timer_data *timer;
LCUISleeper_BreakSleep( &timer_sleeper );
Queue_Lock( &global_timer_list );
timer = TimerList_Find( timer_id );
if( timer ) {
/* 记录暂停时的时间 */
timer->pause_time = LCUI_GetTickCount();
timer->state = STATE_PAUSE;
Queue_Unlock( &global_timer_list );
return 0;
}
Queue_Unlock( &global_timer_list );
return -1;
}
/**
* 重设定时器的等待时间
* @param timer_id
* 需要释放的定时器的标识符
* @param n_ms
* 等待的时间，单位为毫秒
* @return
* 正常返回0，指定ID的定时器不存在则返回-1.
* */
LCUI_API int LCUITimer_Reset( int timer_id, long int n_ms )
{
timer_data *timer;
LCUISleeper_BreakSleep( &timer_sleeper );
Queue_Lock( &global_timer_list );
timer = TimerList_Find( timer_id );
if( timer ) {
timer->start_time = LCUI_GetTickCount();
timer->pause_ms = 0;
timer->total_ms = n_ms;
TimerList_UpdateTimerPos( &global_timer_list, timer );
Queue_Unlock( &global_timer_list );
return 0;
}
Queue_Unlock( &global_timer_list );
return -1;
}
/**
* 设置定时器
* 定时器的作用是让一个任务在经过指定时间后才执行
* @param n_ms
* 等待的时间，单位为毫秒
* @param callback_func
* 用于响应定时器的回调函数
* @param reuse
* 指示该定时器是否重复使用，如果要用于循环定时处理某些
* 任务，可将它置为 TRUE，否则置于 FALSE。
* @return
* 该定时器的标识符
* */
LCUI_API int LCUITimer_Set( long int n_ms,
void (*callback_func)(void*),
void *arg,
LCUI_BOOL reuse )
{
int n;
int64_t time_left;
timer_data timer, *p_timer;
static int id = 100;
/* 打断定时器睡眠者的睡眠 */
LCUISleeper_BreakSleep( &timer_sleeper );
Queue_Lock( &global_timer_list );
n = Queue_GetTotal( &global_timer_list );
while(n--) {
p_timer = (timer_data*)Queue_Get( &global_timer_list, n );
if( !p_timer ) {
continue;
}
time_left = LCUI_GetTicks( p_timer->start_time );
time_left -= p_timer->pause_ms;
time_left = p_timer->total_ms - time_left;
if( time_left <= n_ms ) {
break;
}
}
timer.id = ++id;
timer.app_id = LCUIApp_GetSelfID();
timer.state = STATE_RUN;
timer.reuse = reuse;
timer.total_ms = n_ms;
timer.pause_ms = 0;
timer.start_time = LCUI_GetTickCount();
timer.callback_func = callback_func;
timer.arg = arg;
Queue_Insert( &global_timer_list, n+1, &timer );
Queue_Unlock( &global_timer_list );
DEBUG_MSG("set timer, id: %d, total_ms: %d,app_id: %lu\n", timer.id, timer.total_ms, timer.app_id);
return timer.id;
}
/** 定时器线程，用于处理列表中各个定时器 */
static void TimerThread( void *arg )
{
int i, n;
long int n_ms;
LCUI_Func func_data;
LCUI_Queue *timer_list;
timer_data *timer = NULL;
int64_t lost_ms;
timer_list = (LCUI_Queue*)arg;
func_data.arg[0] = NULL;
func_data.arg[1] = NULL;
while( !LCUI_Active() ) {
LCUI_MSleep(10);
}
while( timer_thread_active ) {
Queue_Lock( timer_list );
n = Queue_GetTotal( timer_list );
for(i=0; i<n; ++i) {
timer = (timer_data*)Queue_Get( timer_list , i);
if( !timer ) {
continue;
}
if( timer->state == STATE_RUN ) {
break;
}
}
Queue_Unlock( timer_list );
/* 没有要处理的定时器，停留一段时间再进行下次循环 */
if(i >= n || !timer ) {
LCUI_MSleep(10);
continue;
}
lost_ms = LCUI_GetTicks( timer->start_time );
/* 减去处于暂停状态的时长 */
lost_ms -= timer->pause_ms;
/* 若流失的时间未达到总定时时长 */
if( lost_ms < timer->total_ms ) {
Queue_Lock( timer_list );
n_ms = timer->total_ms - lost_ms;
/* 开始睡眠 */
LCUISleeper_StartSleep( &timer_sleeper, n_ms );
Queue_Unlock( timer_list );
lost_ms = LCUI_GetTicks( timer->start_time );
lost_ms -= timer->pause_ms;
if( lost_ms < timer->total_ms ) {
continue;
}
}
DEBUG_MSG("timer: %d, start_time: %I64dms, cur_time: %I64dms, cur_ms: %I64d, total_ms: %ld\n",
timer->id, timer->start_time, LCUI_GetTickCount(), timer->total_ms-lost_ms, timer->total_ms);
/* 准备任务数据 */
func_data.id = timer->app_id;
func_data.func = (CallBackFunc)timer->callback_func;
func_data.arg[0] = timer->arg;
func_data.destroy_arg[0] = FALSE;
/* 添加该任务至指定程序的任务队列，添加模式是覆盖 */
AppTasks_CustomAdd( ADD_MODE_REPLACE | AND_ARG_F, &func_data );
Queue_Lock( timer_list );
/* 若需要重复使用，则重置剩余等待时间 */
if( timer->reuse ) {
timer->start_time = LCUI_GetTickCount();
timer->pause_ms = 0;
TimerList_UpdateTimerPos( timer_list, timer );
} else { /* 否则，释放该定时器 */
LCUITimer_Free( timer->id );
}
Queue_Unlock( timer_list );
}
LCUIThread_Exit(NULL);
}
