Kernel/include/threads.h

   1 /*
   2  */
   3 #ifndef _THREADS_H_
   4 #define _THREADS_H_
   5
   6 #include <arch.h>
   7 #include <signal.h>
   8 #include <proc.h>
   9
  10 typedef struct sMessage
  11 {
  12         struct sMessage *Next;
  13         Uint    Source;
  14         Uint    Length;
  15         Uint8   Data[];
  16 } tMsg; // sizeof = 12+
  17
  18 typedef struct sThread
  19 {
  20         // --- threads.c's
  21         struct sThread  *Next;  //!< Next thread in list
  22         tShortSpinlock  IsLocked;       //!< Thread's spinlock
  23         volatile int    Status;         //!< Thread Status
  24          int    RetStatus;      //!< Return Status
  25
  26         Uint    TID;    //!< Thread ID
  27         Uint    TGID;   //!< Thread Group (Process)
  28         Uint    PTID;   //!< Parent Thread ID
  29         Uint    UID, GID;       //!< User and Group
  30         char    *ThreadName;    //!< Name of thread
  31
  32         // --- arch/proc.c's responsibility
  33         //! Kernel Stack Base
  34         tVAddr  KernelStack;
  35
  36         //! Memory Manager State
  37         tMemoryState    MemState;
  38
  39         //! State on task switch
  40         tTaskState      SavedState;
  41
  42         // --- threads.c's
  43          int    CurFaultNum;    //!< Current fault number, 0: none
  44         tVAddr  FaultHandler;   //!< Fault Handler
  45
  46         tMsg * volatile Messages;       //!< Message Queue
  47         tMsg    *LastMessage;   //!< Last Message (speeds up insertion)
  48
  49          int    Quantum, Remaining;     //!< Quantum Size and remaining timesteps
  50          int    NumTickets;     //!< Priority - Chance of gaining CPU
  51
  52         Uint    Config[NUM_CFG_ENTRIES];        //!< Per-process configuration
  53
  54         volatile int    CurCPU;
  55 } tThread;
  56
  57
  58 enum {
  59         THREAD_STAT_NULL,
  60         THREAD_STAT_ACTIVE,
  61         THREAD_STAT_SLEEPING,
  62         THREAD_STAT_WAITING,
  63         THREAD_STAT_ZOMBIE,
  64         THREAD_STAT_DEAD
  65 };
  66
  67 enum eFaultNumbers
  68 {
  69         FAULT_MISC,
  70         FAULT_PAGE,
  71         FAULT_ACCESS,
  72         FAULT_DIV0,
  73         FAULT_OPCODE,
  74         FAULT_FLOAT
  75 };
  76
  77 #define GETMSG_IGNORE   ((void*)-1)
  78
  79 // === FUNCTIONS ===
  80 extern tThread  *Proc_GetCurThread(void);
  81 extern tThread  *Threads_GetThread(Uint TID);
  82 extern void     Threads_SetTickets(tThread *Thread, int Num);
  83 extern int      Threads_Wake(tThread *Thread);
  84 extern void     Threads_AddActive(tThread *Thread);
  85 extern tThread  *Threads_GetNextToRun(int CPU, tThread *Last);
  86
  87 #endif