操作系统学习笔记(28)--初始化进程调度

 

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