/*
* 功能：用于对LCUI进行初始化操作
* 说明：每个使用LCUI实现图形界面的程序，都需要先调用此函数进行LCUI的初始化
* */
int LCUI_Init(void)
{
if( System.is_inited ) {
return -1;
}
System.is_inited = TRUE;
System.func_atexit = NULL;
System.exit_code = 0;
System.state = STATE_ACTIVE;
System.main_tid = LCUIThread_SelfID();
LCUI_ShowCopyrightText();
LCUIApp_Init();
/* 初始化各个模块 */
LCUI_InitEvent();
LCUI_InitFont();
LCUI_InitTimer();
LCUI_InitDevice();
LCUI_InitKeyboard();
LCUI_InitMouse();
LCUI_InitCursor();
LCUI_InitWidget();
LCUI_InitDisplay();
{
LCUI_Pos pos;
pos.x = LCUIDisplay_GetWidth()/2;
pos.y = LCUIDisplay_GetHeight()/2;
/* 让鼠标游标居中显示 */
LCUICursor_SetPos( pos );
LCUICursor_Show();
}
return 0;
}
/** 检测当前是否在主线程上 */
LCUI_BOOL LCUI_IsOnMainLoop(void)
{
if( !MainApp.loop ) {
return FALSE;
}
return (MainApp.loop->tid == LCUIThread_SelfID());
}
/*
* 功能：创建一个LCUI程序
* 说明：此函数会将程序信息添加至程序列表
* 返回值：成功则返回程序的ID，失败则返回-1
**/
static int LCUIAppList_Add( void )
{
LCUI_App app;
LCUIApp_Init (&app); /* 初始化程序数据结构体 */
app.id = LCUIThread_SelfID(); /* 保存ID */
Queue_Add(&LCUI_Sys.app_list, &app); /* 添加至队列 */
LCUIApp_RegisterMainThread( app.id ); /* 注册程序主线程 */
return 0;
}
/* 获取指向程序数据的指针 */
LCUI_API LCUI_App*
LCUIApp_GetSelf( void )
{
LCUI_Thread id;
id = LCUIThread_SelfID(); /* 获取本线程ID */
if(id == LCUI_Sys.display_thread
|| id == LCUI_Sys.dev_thread
|| id == LCUI_Sys.self_id
|| id == LCUI_Sys.timer_thread )
{/* 由于内核及其它线程ID没有被记录，只有直接返回LCUI主程序的线程ID了 */
return LCUIApp_Find((LCUI_ID)LCUI_Sys.self_id);
}
id = LCUIThread_GetRootThreadID( id );
return LCUIApp_Find( (LCUI_ID)id );
}
LCUIThread_Create( LCUI_Thread *tidp, void (*start_rtn)(void*), void * arg )
{
Thread_TreeNode *tt;
LCUI_Thread cur_tid;
/* 先获取当前所在线程的ID */
cur_tid = LCUIThread_SelfID();
/* 在线程树中查找匹配的线程ID，并得到该结点的指针 */
tt = ThreadTree_Find( &thread_tree, cur_tid );
/* 如果没有搜索到，那就新增，并获得该结点指针 */
if(tt == NULL) {
tt = ThreadTreeNode_AddNew( &thread_tree, cur_tid );
if(tt == NULL) {
return -1;
}
}
_LCUIThread_Create( tidp, start_rtn, arg );
/* 将得到的线程ID添加至结点 */
ThreadTreeNode_AddNew( tt, *tidp );
return 0;
}
/** 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;
}
LCUIModule_Thread_Init( void )
{
Thread_TreeNode_Init( &thread_tree ); /* 初始化根线程结点 */
thread_tree.tid = LCUIThread_SelfID(); /* 当前线程ID作为根结点 */
LCUI_Sys.self_id = thread_tree.tid; /* 保存线程ID */
}