void FrameControl_Remain( FrameControl ctx )
{
int64_t current_time;
unsigned int n_ms, lost_ms;
if( ctx->state == STATE_QUIT ) {
return;
}
lost_ms = 0;
current_time = LCUI_GetTime();
LCUIMutex_Lock( &ctx->mutex );
n_ms = (unsigned 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;
}
/* 睡眠一段时间 */
while( lost_ms < n_ms && ctx->state == STATE_RUN ) {
LCUICond_TimedWait( &ctx->cond, &ctx->mutex, n_ms - lost_ms );
lost_ms = (unsigned int)LCUI_GetTimeDelta( current_time );
}
/* 睡眠结束后，如果当前状态为 PAUSE，则说明睡眠是因为要暂停而终止的 */
if( ctx->state == STATE_PAUSE ) {
current_time = LCUI_GetTime();
/* 等待状态改为“继续” */
while( ctx->state == STATE_PAUSE ) {
LCUICond_Wait( &ctx->cond, &ctx->mutex );
}
lost_ms = (unsigned int)LCUI_GetTimeDelta( current_time );
ctx->pause_time = lost_ms;
ctx->prev_frame_start_time += lost_ms;
LCUIMutex_Unlock( &ctx->mutex );
return;
}
normal_exit:;
current_time = LCUI_GetTime();
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;
LCUIMutex_Unlock( &ctx->mutex );
}
/** 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;
}
/** 运行目标主循环 */
int LCUI_MainLoop_Run( LCUI_MainLoop loop )
{
if( loop->state == STATE_RUNNING ) {
_DEBUG_MSG("error: main-loop already running.");
return -1;
}
DEBUG_MSG("loop: %p, enter\n", loop);
loop->state = STATE_RUNNING;
/* 将主循环记录插入至列表表头 */
LinkedList_Goto( &MainApp.loop_list, 0 );
LinkedList_Insert( &MainApp.loop_list, loop );
MainApp.loop = loop;
LCUIMutex_Lock( &MainApp.loop_changed );
/* 广播，让其它线程交出主循环运行权 */
LCUICond_Broadcast( &MainApp.loop_cond );
/* 获取运行权 */
LCUIMutex_Lock( &MainApp.loop_mutex );
LCUIMutex_Unlock( &MainApp.loop_changed );
loop->tid = LCUIThread_SelfID();
while( loop->state != STATE_EXITED ) {
if( LinkedList_GetTotal(&MainApp.task_list) <= 0 ) {
DEBUG_MSG("loop: %p, sleeping...\n", loop);
LCUICond_TimedWait( &MainApp.loop_cond, 1000 );
DEBUG_MSG("loop: %p, wakeup\n", loop);
/** 如果当前运行的主循环不是自己 */
if( MainApp.loop != loop ) {
loop->state = STATE_PAUSED;
DEBUG_MSG("loop: %p, release control.\n", loop);
LCUIMutex_Unlock( &MainApp.loop_mutex );
/* 等待其它线程获得主循环运行权 */
LCUIMutex_Lock( &MainApp.loop_changed );
LCUIMutex_Unlock( &MainApp.loop_changed );
DEBUG_MSG("loop: %p, waiting...\n", loop);
/* 等待其它线程释放主循环运行权 */
LCUIMutex_Lock( &MainApp.loop_mutex );
}
continue;
}
DEBUG_MSG("loop: %p, run task.\n", loop);
LCUI_RunTask();
}
loop->state = STATE_EXITED;
LinkedList_Goto( &MainApp.loop_list, 0 );
LinkedList_Delete( &MainApp.loop_list );
/* 获取处于列表表头的主循环 */
loop = (LCUI_MainLoop)LinkedList_Get( &MainApp.loop_list );
if( loop ) {
/* 改变当前运行的主循环 */
MainApp.loop = loop;
LCUICond_Broadcast( &MainApp.loop_cond );
}
/* 释放运行权 */
LCUIMutex_Unlock( &MainApp.loop_mutex );
/* 如果列表为空，一般意味着LCUI需要退出了 */
if( LinkedList_GetTotal( &MainApp.loop_list ) <= 0 ) {
/** 广播，通知相关线程开始进行清理操作 */
LCUICond_Broadcast( &MainApp.loop_list_empty );
}
DEBUG_MSG("loop: %p, exit\n", loop);
return 0;
}
