#include?
#include?
#include?
#include?
?/*?狀態(tài)定義?*/
#define?START??????-1
#define?FINISHED????0
#define?RUNNING????1
#define?READY??????2
#define?BLOCKED????3
#define?RUNCOUNT?10000
#define?TCBNUM?????6
#define?LEN????????100
#define?GET_INDOS?0x34
#define?GET_CRIT_ERR?0x5d06
#define?INT_MIN????-32767
#define?WoKao??????1
/*?人性化一點?*/
int?TLE=6;
int?current=-1;
int?timecount=0;
int?tcb_num=6;
char?far?*indos_ptr=0;
char?far?*crit_err_ptr=0;
typedef?int?（far*?codeptr）（）;
int?DosBusy（）;
void?InitDos（）;
void?InitTCB（）;
void?InitView（）;
void?Begin（）;
void?Wait（）;
void?FUN（）;
void?over（）;
void?tcb_state（）;
void?interrupt?（*old_int8）（）;?/*?原來的時間中斷程序?*/
void?interrupt?new_int8（）;?/*?具有按時間片調(diào)度功能的新的時鐘中斷函數(shù)?*/
void?interrupt?swtch（）;?/*?因其它原因引起CPU調(diào)度?*/
void?create（char*codeptrintint）;?/*?創(chuàng)建線程?*/
int?ALL_FINISHED（）;?/*?線程是否都已完成?*/
int?FIND（）;?/*?尋找優(yōu)先權(quán)最高的READY線程?*/
void?thread_1（）;?/*線程集*/
void?thread_2（）;
void?thread_3（）;
void?thread_4（）;
void?thread_5（）;
/*?TCB?*/
struct?TCB
{
??????unsigned?char?*?stack;?/*?堆棧起始地址?*/
??????unsigned?ss;?/*?堆棧斷址?*/
??????unsigned?sp;?/*?進(jìn)程指針?*/
??????char?state;?/*?進(jìn)程狀態(tài)?*/
??????char?name[10];
??????int?value;
??????/*對TCB進(jìn)行擴(kuò)充*/
}tcb[TCBNUM];
?/*?現(xiàn)場保護(hù)和恢復(fù)的數(shù)據(jù)結(jié)構(gòu)?*/
struct?int_regs
{
??????unsigned?DPDISIDSESDXCXBXAXIPCSFLAGSoffseg;
};
?/*InitInDos
*Funtion?to?get?the?addresses?of?INDOS?and?CRIT_ERR?flags
*/
int?Random（）?
{int?mseed;?
?randomize（）;?	
?seed=random（100）?;
if?（seed<0）?m=-seed;?
else?m=seed;
seed=（25173*seed+13849）%65536;
return?（m/32767.0）;?
}
void?InitInDos（）
{
??????union?REGS?regs;
??????struct?SREGS?segregs;

??????/*?get?the?address?of?INDOS?flag?*/
??????regs.h.ah=GET_INDOS;
??????intdosx（®s®s&segregs）;
??????indos_ptr=MK_FP（segregs.esregs.x.bx）;

??????/*?get?the?address?of?CRIT_ERR?flag?*/
??????if（_osmajor<3）?crit_err_ptr=indos_ptr+1;
??????else?if（_osmajor==3?&&?_osminor==0）?crit_err_ptr=indos_ptr-1;
??????else?
??????{
??????????regs.x.ax=GET_CRIT_ERR;
??????????intdosx（®s®s&segregs）;
??????????crit_err_ptr=MK_FP（segregs.dsregs.x.si）;
??????}
}
/*DosBusy
*Function?return?non_zero?if?DOS?is?busy
*/
int?DosBusy（）
{
??????/*?IninInDos（）?hasn‘t?been?called?*/
??????if（indos_ptr?&&?crit_err_ptr）?return?（*indos_ptr?||?*crit_err_ptr）;
??????else?return?-1;
}
?/*?初始化TCB?*/
void?InitTCB（）
{
??????int?i;
??????for（i=0;i??????{
??????????tcb[i].state=START;
??????}
}
/*?結(jié)束TCB?*/
void?over（）
{
??????if（tcb[current].state==RUNNING）
??????{
??????????disable（）;
??????????tcb[current].state=FINISHED;
??????????free（tcb[current].stack）;
??????????enable（）;
??????}
??????swtch（）;
}
void?tcb_state（int?flag）
{
??????int?i;
??????printf（“\n“）;
??????if（!flag）printf（“The?Main?Thread?is?READY\n“）;
??????for（i=1;i??????{
??????????if（tcb[i].state==START）continue;
??????????switch（tcb[i].state）
??????????{

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????9877??2008-06-12?19:04??新建文件夾\24\pp.c

?????目錄??????????0??2008-06-12?19:04??新建文件夾\24

?????文件???????4523??2008-06-12?18:48??新建文件夾\27\procee.c

?????目錄??????????0??2008-06-12?19:04??新建文件夾\27

?????文件??????????0??2008-06-12?18:38??新建文件夾\新建?Microsoft?Word?文檔.doc

?????目錄??????????0??2008-06-12?19:05??新建文件夾

-----------?---------??----------?-----??----

????????????????14400????????????????????6