Kernel/include/threads.h

   1 /*
   2  */
   3 #ifndef _THREADS_H_
   4 #define _THREADS_H_
   5
   6 #include <arch.h>
   7 #include <signal.h>
   8
   9 typedef struct sMessage
  10 {
  11         struct sMessage *Next;
  12         Uint    Source;
  13         Uint    Length;
  14         Uint8   Data[];
  15 } tMsg; // sizeof = 12+
  16
  17 typedef struct sThread
  18 {
  19         // --- threads.c's
  20         struct sThread  *Next;  //!< Next thread in list
  21         tSpinlock       IsLocked;       //!< Thread's spinlock
  22         volatile int    Status;         //!< Thread Status
  23          int    RetStatus;      //!< Return Status
  24
  25         Uint    TID;    //!< Thread ID
  26         Uint    TGID;   //!< Thread Group (Process)
  27         Uint    PTID;   //!< Parent Thread ID
  28         Uint    UID, GID;       //!< User and Group
  29         char    *ThreadName;    //!< Name of thread
  30
  31         // --- arch/proc.c's responsibility
  32         //! Kernel Stack Base
  33         tVAddr  KernelStack;
  34
  35         //! Memory Manager State
  36         tMemoryState    MemState;
  37
  38         //! State on task switch
  39         tTaskState      SavedState;
  40
  41         // --- threads.c's
  42          int    CurSignal;      //!< Signal currently being handled (0 for none)
  43         tVAddr  SignalHandlers[NSIG];   //!< Signal Handler List
  44         tTaskState      SignalState;    //!< Saved state for signal 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 } tThread;
  54
  55
  56 enum {
  57         THREAD_STAT_NULL,
  58         THREAD_STAT_ACTIVE,
  59         THREAD_STAT_SLEEPING,
  60         THREAD_STAT_WAITING,
  61         THREAD_STAT_ZOMBIE,
  62         THREAD_STAT_DEAD
  63 };
  64
  65 // === FUNCTIONS ===
  66 extern tThread  *Proc_GetCurThread();
  67 extern tThread  *Threads_GetThread(Uint TID);
  68 extern void     Threads_Wake(tThread *Thread);
  69 extern void     Threads_AddActive(tThread *Thread);
  70
  71 #endif