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1ebb5df920
This flag indicates that something has already gone wrong and least amount of code should be used to do reboot or shutdown. This means not running non-critical reset handlers. Note that the handler itself needs to decide whethere it is critical or not.
241 lines
7.8 KiB
C
241 lines
7.8 KiB
C
#ifndef EXEC_TASKS_H
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#define EXEC_TASKS_H
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/*
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Copyright © 1995-2020, The AROS Development Team. All rights reserved.
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$Id$
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Desc: Task structure and constants
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Lang: english
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*/
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#ifndef EXEC_NODES_H
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# include <exec/nodes.h>
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#endif
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#ifndef EXEC_LISTS_H
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# include <exec/lists.h>
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#endif
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#ifndef EXEC_PORTS_H
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# include <exec/ports.h>
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#endif
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#ifndef UTILITY_TAGITEM_H
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# include <utility/tagitem.h>
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#endif
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struct ETask;
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/* You must use Exec functions to modify task structure fields. */
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struct Task
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{
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struct Node tc_Node;
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UBYTE tc_Flags;
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UBYTE tc_State;
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BYTE tc_IDNestCnt; /* Interrupt disabled nesting */
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BYTE tc_TDNestCnt; /* Task disabled nesting */
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ULONG tc_SigAlloc; /* Allocated signals */
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ULONG tc_SigWait; /* Signals we are waiting for */
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ULONG tc_SigRecvd; /* Received signals */
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ULONG tc_SigExcept; /* Signals we will take exceptions for */
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union
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{
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struct
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{
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UWORD tc_ETrapAlloc; /* Allocated traps */
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UWORD tc_ETrapAble; /* Enabled traps */
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} tc_ETrap;
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struct ETask *tc_ETask; /* Valid if TF_ETASK is set */
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} tc_UnionETask;
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APTR tc_ExceptData; /* Exception data */
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APTR tc_ExceptCode; /* Exception code */
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APTR tc_TrapData; /* Trap data */
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APTR tc_TrapCode; /* Trap code */
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APTR tc_SPReg; /* Stack pointer */
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APTR tc_SPLower; /* Stack lower bound */
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APTR tc_SPUpper; /* Stack upper bound */
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VOID (* tc_Switch)(); /* Task loses CPU */
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VOID (* tc_Launch)(); /* Task gets CPU */
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struct List tc_MemEntry; /* Allocated memory. Freed by RemTask(). */
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APTR tc_UserData; /* For use by the task; no restrictions! */
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};
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#define tc_TrapAlloc tc_UnionETask.tc_ETrap.tc_ETrapAlloc
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#define tc_TrapAble tc_UnionETask.tc_ETrap.tc_ETrapAble
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/* Macros */
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#define GetTrapAlloc(t) \
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({struct Task *_t = (struct Task *)t;\
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(_t->tc_Flags & TF_ETASK) ? _t->tc_UnionETask.tc_ETask->et_TrapAlloc : \
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_t->tc_UnionETask.tc_ETrap.tc_ETrapAlloc; \
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})
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#define GetTrapAble(t) \
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({struct Task *_t = (struct Task *)t;\
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(_t->tc_Flags & TF_ETASK) ? _t->tc_UnionETask.tc_ETask->et_TrapAble : \
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_t->tc_UnionETask.tc_ETrap.tc_ETrapAble;\
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})
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#define GetETask(t) \
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({struct Task *_t = (struct Task *)t;\
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(_t->tc_Flags & TF_ETASK) ? _t->tc_UnionETask.tc_ETask : NULL; \
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})
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#define GetETaskID(t) \
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({struct Task *_t = (struct Task *)t;\
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(_t->tc_Flags & TF_ETASK) ? _t->tc_UnionETask.tc_ETask->et_UniqueID: 0UL; \
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})
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/* Stack swap structure as passed to StackSwap() */
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struct StackSwapStruct
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{
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APTR stk_Lower; /* Lowest byte of stack */
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APTR stk_Upper; /* Upper end of stack (size + Lowest) */
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APTR stk_Pointer; /* Stack pointer at switch point */
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};
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struct StackSwapArgs
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{
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IPTR Args[8]; /* The C function arguments */
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};
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/* tc_Flags Bits */
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#define TB_PROCTIME 0
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#define TB_ETASK 3
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#define TB_STACKCHK 4
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#define TB_EXCEPT 5
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#define TB_SWITCH 6
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#define TB_LAUNCH 7
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#define TF_PROCTIME (1L<<0)
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#define TF_ETASK (1L<<3)
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#define TF_STACKCHK (1L<<4)
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#define TF_EXCEPT (1L<<5)
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#define TF_SWITCH (1L<<6)
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#define TF_LAUNCH (1L<<7)
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/* Task States (tc_State) */
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#define TS_INVALID 0
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#define TS_ADDED 1
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#define TS_RUN 2
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#define TS_READY 3
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#define TS_WAIT 4
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#define TS_EXCEPT 5
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#define TS_REMOVED 6
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/* AROS specific */
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#define TS_TOMBSTONED 7
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#define TS_SPIN 8
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/* Predefined Signals */
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#define SIGB_ABORT 0
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#define SIGB_CHILD 1
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#define SIGB_BLIT 4 /* Note: same as SIGB_SINGLE */
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#define SIGB_SINGLE 4 /* Note: same as SIGB_BLIT */
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#define SIGB_INTUITION 5
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#define SIGB_NET 7
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#define SIGB_DOS 8
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#define SIGF_ABORT (1L<<0)
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#define SIGF_CHILD (1L<<1)
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#define SIGF_BLIT (1L<<4)
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#define SIGF_SINGLE (1L<<4)
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#define SIGF_INTUITION (1L<<5)
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#define SIGF_NET (1L<<7)
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#define SIGF_DOS (1L<<8)
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/* Define this when compiling MorphOS-compatible source */
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#ifdef AROS_MORPHOS_COMPATIBLE
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#define tc_ETask tc_UnionETask.tc_ETask
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struct ETask
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{
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struct Message Message;
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struct Task *Parent; /* Pointer to task */
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ULONG UniqueID;
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struct MinList Children; /* List of children */
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UWORD TrapAlloc;
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UWORD TrapAble;
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ULONG Result1; /* First result */
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APTR Result2; /* Result data pointer (AllocVec) */
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struct MsgPort MsgPort;
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void *MemPool;
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void *Reserved[2];
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void *RegFrame;
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/* Internal fields follow */
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};
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#else
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/* Extended Task structure */
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struct ETask
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{
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struct Message et_Message;
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APTR et_Parent; /* Pointer to parent task */
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ULONG et_UniqueID;
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struct MinList et_Children; /* List of children */
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UWORD et_TrapAlloc;
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UWORD et_TrapAble;
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ULONG et_Result1; /* First result */
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APTR et_Result2; /* Result data pointer (AllocVec) */
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struct MsgPort et_TaskMsgPort;
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void *et_MemPool; /* Task's private memory pool */
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#ifdef __AROS__
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IPTR et_Reserved[1]; /* MorphOS Private */
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IPTR *et_TaskStorage; /* Task Storage Slots */
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#else
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IPTR et_Reserved[2]; /* MorphOS Private */
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#endif
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void *et_RegFrame;
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/* Internal fields follow */
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};
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#endif
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/* Return codes from new child functions */
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#define CHILD_NOTNEW 1 /* Function not called from a new style task */
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#define CHILD_NOTFOUND 2 /* Child not found */
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#define CHILD_EXITED 3 /* Child has exited */
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#define CHILD_ACTIVE 4 /* Child is currently active and running */
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/* Tags for NewCreateTaskA() and NewAddTask() */
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#define TASKTAG_Dummy (TAG_USER + 0x100000)
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#define TASKTAG_ERROR (TASKTAG_Dummy + 0)
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#define TASKTAG_CODETYPE (TASKTAG_Dummy + 1)
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#define TASKTAG_PC (TASKTAG_Dummy + 2)
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#define TASKTAG_FINALPC (TASKTAG_Dummy + 3)
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#define TASKTAG_STACKSIZE (TASKTAG_Dummy + 4)
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#define TASKTAG_NAME (TASKTAG_Dummy + 6)
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#define TASKTAG_USERDATA (TASKTAG_Dummy + 7)
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#define TASKTAG_PRI (TASKTAG_Dummy + 8)
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#define TASKTAG_POOLPUDDLE (TASKTAG_Dummy + 9)
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#define TASKTAG_POOLTHRESH (TASKTAG_Dummy + 10)
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#define TASKTAG_ARG1 (TASKTAG_Dummy + 16)
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#define TASKTAG_ARG2 (TASKTAG_Dummy + 17)
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#define TASKTAG_ARG3 (TASKTAG_Dummy + 18)
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#define TASKTAG_ARG4 (TASKTAG_Dummy + 19)
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#define TASKTAG_ARG5 (TASKTAG_Dummy + 20)
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#define TASKTAG_ARG6 (TASKTAG_Dummy + 21)
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#define TASKTAG_ARG7 (TASKTAG_Dummy + 22)
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#define TASKTAG_ARG8 (TASKTAG_Dummy + 23)
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#define TASKTAG_STARTUPMSG (TASKTAG_Dummy + 24)
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#define TASKTAG_TASKMSGPORT (TASKTAG_Dummy + 25)
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#define TASKTAG_FLAGS (TASKTAG_Dummy + 26)
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#define TASKTAG_TCBEXTRASIZE (TASKTAG_Dummy + 28)
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#define TASKTAG_AFFINITY (TASKTAG_Dummy + 29)
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#define TASKAFFINITY_BOOT 0
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#define TASKAFFINITY_ANY ((IPTR)-1)
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#define TASKAFFINITY_ALL_BUT_SELF ((IPTR)-2)
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#define TASKERROR_OK 0
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#define TASKERROR_NOMEMORY 1
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/* Actions for ShutdownA() */
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#define SD_ACTION_POWEROFF 0
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#define SD_ACTION_COLDREBOOT 1
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#define SD_ACTION_WARMREBOOT 2
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#define SD_ACTION_MASK 0x00000007
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#define SD_FLAG_EMERGENCY 0x00000008 /* Only the most basic/essential code should be executed */
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#endif /* EXEC_TASKS_H */
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