#ifndef EXEC_TASKS_H
#define EXEC_TASKS_H
/*
**      $Filename: exec/tasks.h $
**      $Release: 2.04 Includes, V37.4 $
**      $Revision: 36.9 $
**      $Date: 91/11/06 $
**
**      Task Control Block, Singals, and Task flags.
**
**      (C) Copyright 1985-1999 Amiga, Inc.
**          All Rights Reserved
*/

#ifndef EXEC_NODES_H
#include "exec/nodes.h"
#endif /* EXEC_NODES_H */

#ifndef EXEC_LISTS_H
#include "exec/lists.h"
#endif /* EXEC_LISTS_H */


/* Please use Exec functions to modify task structure fields, where available.
 */
struct Task {
    struct  Node tc_Node;
    UBYTE   tc_Flags;
    UBYTE   tc_State;
    BYTE    tc_IDNestCnt;          /* intr disabled nesting*/
    BYTE    tc_TDNestCnt;          /* task disabled nesting*/
    ULONG   tc_SigAlloc;           /* sigs allocated */
    ULONG   tc_SigWait;            /* sigs we are waiting for */
    ULONG   tc_SigRecvd;           /* sigs we have received */
    ULONG   tc_SigExcept;          /* sigs we will take excepts for */
    UWORD   tc_TrapAlloc;          /* traps allocated */
    UWORD   tc_TrapAble;           /* traps enabled */
    APTR    tc_ExceptData;         /* points to except data */
    APTR    tc_ExceptCode;         /* points to except code */
    APTR    tc_TrapData;           /* points to trap code */
    APTR    tc_TrapCode;           /* points to trap data */
    APTR    tc_SPReg;              /* stack pointer        */
    APTR    tc_SPLower;            /* stack lower bound    */
    APTR    tc_SPUpper;            /* stack upper bound + 2*/
    VOID    (*tc_Switch)();        /* task losing CPU    */
    VOID    (*tc_Launch)();        /* task getting CPU  */
    struct  List tc_MemEntry;      /* Allocated memory. Freed by RemTask() */
    APTR    tc_UserData;            /* For use by the task; no restrictions! */
};

/*
 * Stack swap structure as passed to StackSwap()
 */
struct StackSwapStruct {
       APTR    stk_Lower;      /* Lowest byte of stack */
       ULONG   stk_Upper;      /* Upper end of stack (size + Lowest) */
        APTR    stk_Pointer;    /* Stack pointer at switch point */
};

/*----- Flag Bits ------------------------------------------*/
#define TB_PROCTIME    0
#define TB_ETASK       3
#define TB_STACKCHK    4
#define TB_EXCEPT       5
#define TB_SWITCH       6
#define TB_LAUNCH      7

#define TF_PROCTIME    (1<<0)
#define TF_ETASK       (1<<3)
#define TF_STACKCHK    (1<<4)
#define TF_EXCEPT      (1<<5)
#define TF_SWITCH      (1<<6)
#define TF_LAUNCH       (1<<7)

/*----- Task States ----------------------------------------*/
#define TS_INVALID     0
#define TS_ADDED       1
#define TS_RUN         2
#define TS_READY       3
#define TS_WAIT        4
#define TS_EXCEPT       5
#define TS_REMOVED     6

/*----- Predefined Signals -------------------------------------*/
#define SIGB_ABORT     0
#define SIGB_CHILD     1
#define SIGB_BLIT      4       /* Note: same as SINGLE */
#define SIGB_SINGLE     4       /* Note: same as BLIT */
#define SIGB_INTUITION  5
#define SIGB_DOS        8

#define SIGF_ABORT      (1L<<0)
#define SIGF_CHILD      (1L<<1)
#define SIGF_BLIT       (1L<<4)
#define SIGF_SINGLE     (1L<<4)
#define SIGF_INTUITION  (1L<<5)
#define SIGF_DOS        (1L<<8)

#endif  /* EXEC_TASKS_H */