学步园

内核进程

1 初始化一个进程

2 开始IDLE进程

3 开始Reaper进程

进程队列、进程等待队列、进程等待清理队列。

进程有用户、优先级、计数值、引用值（默认有自己的一个）。

有一个当前的进程全局变量

struct Kernel_Thread {<br /> ulong_t esp; /* offset 0 */<br /> volatile ulong_t numTicks; /* offset 4 */<br /> int priority;<br /> DEFINE_LINK(Thread_Queue, Kernel_Thread);<br /> void* stackPage;<br /> struct User_Context* userContext;<br /> struct Kernel_Thread* owner;<br /> int refCount;</p> <p> /* These fields are used to implement the Join() function */<br /> bool alive;<br /> struct Thread_Queue joinQueue;<br /> int exitCode;</p> <p> /* The kernel thread id; also used as process id */<br /> int pid;</p> <p> /* Link fields for list of all threads in the system. */<br /> DEFINE_LINK(All_Thread_List, Kernel_Thread);</p> <p> /* Array of MAX_TLOCAL_KEYS pointers to thread-local data. */<br /> #define MAX_TLOCAL_KEYS 128<br /> const void* tlocalData[MAX_TLOCAL_KEYS];</p> <p>