include/thread.h

   1 /*
   2  * Thread definitions
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  */
   6
   7 #ifndef __WINE_THREAD_H
   8 #define __WINE_THREAD_H
   9
  10 #include "config.h"
  11 #include "winbase.h"
  12 #include "syslevel.h"
  13 #include "selectors.h"  /* for SET_FS */
  14
  15 struct _PDB;
  16 struct __EXCEPTION_FRAME;
  17
  18 /* Thread exception block */
  19 typedef struct _TEB
  20 {
  21     struct __EXCEPTION_FRAME *except; /* 00 Head of exception handling chain */
  22     void        *stack_top;      /* 04 Top of thread stack */
  23     void        *stack_low;      /* 08 Stack low-water mark */
  24     HTASK16      htask16;        /* 0c Win16 task handle */
  25     WORD         stack_sel;      /* 0e 16-bit stack selector */
  26     DWORD        selman_list;    /* 10 Selector manager list */
  27     DWORD        user_ptr;       /* 14 User pointer */
  28     struct _TEB *self;           /* 18 Pointer to this structure */
  29     WORD         flags;          /* 1c Flags */
  30     WORD         mutex_count;    /* 1e Win16 mutex count */
  31     DWORD        debug_context;  /* 20 Debug context */
  32     void        *tid;            /* 24 Thread id */
  33     HQUEUE16     queue;          /* 28 Message queue */
  34     WORD         pad1;           /* 2a */
  35     LPVOID      *tls_ptr;        /* 2c Pointer to TLS array */
  36     struct _PDB *process;        /* 30 owning process (used by NT3.51 applets)*/
  37 } TEB;
  38
  39 /* Thread exception flags */
  40 #define TEBF_WIN32  0x0001
  41 #define TEBF_TRAP   0x0002
  42
  43 /* Thread database */
  44 typedef struct _THDB
  45 {
  46     LONG           header[2];      /*  00 Kernel object header */
  47     struct _PDB   *process;        /*  08 Process owning this thread */
  48     HANDLE         event;          /*  0c Thread event */
  49     TEB            teb;            /*  10 Thread exception block */
  50     DWORD          flags;          /*  44 Flags */
  51     DWORD          exit_code;      /*  48 Termination status */
  52     WORD           teb_sel;        /*  4c Selector to TEB */
  53     WORD           emu_sel;        /*  4e 80387 emulator selector */
  54     int            thread_errno;   /*  50 Per-thread errno (was: unknown) */
  55     void          *wait_list;      /*  54 Event waiting list */
  56     int            thread_h_errno; /*  50 Per-thread h_errno (was: unknown) */
  57     void          *ring0_thread;   /*  5c Pointer to ring 0 thread */
  58     void          *ptdbx;          /*  60 Pointer to TDBX structure */
  59     void          *stack_base;     /*  64 Base of the stack */
  60     void          *signal_stack;   /*  68 Signal stack (was: exit_stack) */
  61     void          *emu_data;       /*  6c Related to 80387 emulation */
  62     DWORD          last_error;     /*  70 Last error code */
  63     void          *debugger_CB;    /*  74 Debugger context block */
  64     DWORD          debug_thread;   /*  78 Thread debugging this one (?) */
  65     void          *pcontext;       /*  7c Thread register context */
  66     DWORD          cur_stack;      /*  80 Current stack (was: unknown) */
  67     DWORD          unknown3[2];    /*  84 Unknown */
  68     WORD           current_ss;     /*  8c Another 16-bit stack selector */
  69     WORD           pad2;           /*  8e */
  70     void          *ss_table;       /*  90 Pointer to info about 16-bit stack */
  71     WORD           thunk_ss;       /*  94 Yet another 16-bit stack selector */
  72     WORD           pad3;           /*  96 */
  73     LPVOID         tls_array[64];  /*  98 Thread local storage */
  74     DWORD          delta_priority; /* 198 Priority delta */
  75     DWORD          unknown4[7];    /* 19c Unknown */
  76     void          *create_data;    /* 1b8 Pointer to creation structure */
  77     DWORD          suspend_count;  /* 1bc SuspendThread() counter */
  78     void          *entry_point;    /* 1c0 Thread entry point (was: unknown) */
  79     void          *entry_arg;      /* 1c4 Entry point arg (was: unknown) */
  80     DWORD          unknown5[4];    /* 1c8 Unknown */
  81     DWORD          sys_count[4];   /* 1d8 Syslevel mutex entry counters */
  82     SYSLEVEL      *sys_mutex[4];   /* 1e8 Syslevel mutex pointers */
  83     DWORD          unknown6[2];    /* 1f8 Unknown */
  84     /* The following are Wine-specific fields */
  85     int            socket;         /* Socket for server communication */
  86     unsigned int   seq;            /* Server sequence number */
  87     void         (*startup)(void); /* Thread startup routine */
  88     struct _THDB  *next;           /* Global thread list */
  89     DWORD          cleanup;        /* Cleanup service handle */
  90 } THDB;
  91
  92 /* The pseudo handle value returned by GetCurrentThread */
  93 #define CURRENT_THREAD_PSEUDOHANDLE 0xfffffffe
  94
  95 /* The per-thread signal stack size */
  96 #define SIGNAL_STACK_SIZE  16384
  97
  98
  99 /* scheduler/thread.c */
 100 extern THDB *THREAD_CreateInitialThread( struct _PDB *pdb, int server_fd );
 101 extern THDB *THREAD_Create( struct _PDB *pdb, DWORD flags,
 102                             DWORD stack_size, BOOL alloc_stack16,
 103                             LPSECURITY_ATTRIBUTES sa, int *server_handle );
 104 extern BOOL THREAD_IsWin16( THDB *thdb );
 105 extern THDB *THREAD_IdToTHDB( DWORD id );
 106
 107 /* scheduler/sysdeps.c */
 108 extern int SYSDEPS_SpawnThread( THDB *thread );
 109 extern void SYSDEPS_SetCurThread( THDB *thread );
 110 extern void SYSDEPS_ExitThread(void);
 111 extern TEB * WINAPI NtCurrentTeb(void);
 112
 113 /* return the current thread TEB pointer */
 114 static inline TEB *CURRENT(void)
 115 {
 116 #ifdef __i386__
 117     TEB *teb;
 118     __asm__( ".byte 0x64\n\tmovl (0x18),%0" : "=r" (teb) );
 119     return teb;
 120 #else
 121     return NtCurrentTeb();
 122 #endif
 123 }
 124
 125 /* return the current thread THDB pointer */
 126 static inline THDB *THREAD_Current(void)
 127 {
 128     TEB *teb = CURRENT();
 129     return (THDB *)((char *)teb - (int)&((THDB *)0)->teb);
 130 }
 131
 132 #endif  /* __WINE_THREAD_H */