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 "selectors.h"  /* for SET_FS */
  13
  14 #ifdef linux
  15 #define HAVE_CLONE_SYSCALL
  16 #endif
  17
  18 /* This is what we will use on *BSD, once threads using rfork() get
  19  * implemented:
  20  *
  21  * #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
  22  * #define HAVE_RFORK
  23  * #endif
  24  */
  25
  26 #if (defined(HAVE_CLONE_SYSCALL) || defined(HAVE_RFORK)) && !defined(NO_REENTRANT_LIBC)
  27 #define USE_THREADS
  28 #endif
  29
  30 struct _PDB;
  31
  32 /* Thread exception block */
  33 typedef struct _TEB
  34 {
  35     void        *except;         /* 00 Head of exception handling chain */
  36     void        *stack_top;      /* 04 Top of thread stack */
  37     void        *stack_low;      /* 08 Stack low-water mark */
  38     HTASK16      htask16;        /* 0c Win16 task handle */
  39     WORD         stack_sel;      /* 0e 16-bit stack selector */
  40     DWORD        selman_list;    /* 10 Selector manager list */
  41     DWORD        user_ptr;       /* 14 User pointer */
  42     struct _TEB *self;           /* 18 Pointer to this structure */
  43     WORD         flags;          /* 1c Flags */
  44     WORD         mutex_count;    /* 1e Win16 mutex count */
  45     DWORD        debug_context;  /* 20 Debug context */
  46     DWORD       *ppriority;      /* 24 Pointer to current priority */
  47     HQUEUE16     queue;          /* 28 Message queue */
  48     WORD         pad1;           /* 2a */
  49     LPVOID      *tls_ptr;        /* 2c Pointer to TLS array */
  50     struct _PDB *process;      /* 30 owning process (used by NT3.51 applets)*/
  51 } TEB;
  52
  53 /* Thread exception flags */
  54 #define TEBF_WIN32  0x0001
  55 #define TEBF_TRAP   0x0002
  56
  57 /* Thread database */
  58 typedef struct _THDB
  59 {
  60     LONG           header[2];      /*  00 Kernel object header */
  61     struct _PDB   *process;        /*  08 Process owning this thread */
  62     HANDLE         event;          /*  0c Thread event */
  63     TEB            teb;            /*  10 Thread exception block */
  64     DWORD          flags;          /*  44 Flags */
  65     DWORD          exit_code;      /*  48 Termination status */
  66     WORD           teb_sel;        /*  4c Selector to TEB */
  67     WORD           emu_sel;        /*  4e 80387 emulator selector */
  68     int            thread_errno;   /*  50 Per-thread errno (was: unknown) */
  69     void          *wait_list;      /*  54 Event waiting list */
  70     int            thread_h_errno; /*  50 Per-thread h_errno (was: unknown) */
  71     void          *ring0_thread;   /*  5c Pointer to ring 0 thread */
  72     void          *ptdbx;          /*  60 Pointer to TDBX structure */
  73     void          *stack_base;     /*  64 Base of the stack */
  74     void          *exit_stack;     /*  68 Stack pointer on thread exit */
  75     void          *emu_data;       /*  6c Related to 80387 emulation */
  76     DWORD          last_error;     /*  70 Last error code */
  77     void          *debugger_CB;    /*  74 Debugger context block */
  78     DWORD          debug_thread;   /*  78 Thread debugging this one (?) */
  79     void          *pcontext;       /*  7c Thread register context */
  80     DWORD          cur_stack;      /*  80 Current stack (was: unknown) */
  81     DWORD          unknown3[2];    /*  84 Unknown */
  82     WORD           current_ss;     /*  8c Another 16-bit stack selector */
  83     WORD           pad2;           /*  8e */
  84     void          *ss_table;       /*  90 Pointer to info about 16-bit stack */
  85     WORD           thunk_ss;       /*  94 Yet another 16-bit stack selector */
  86     WORD           pad3;           /*  96 */
  87     LPVOID         tls_array[64];  /*  98 Thread local storage */
  88     DWORD          delta_priority; /* 198 Priority delta */
  89     DWORD          unknown4[7];    /* 19c Unknown */
  90     void          *create_data;    /* 1b8 Pointer to creation structure */
  91     DWORD          suspend_count;  /* 1bc SuspendThread() counter */
  92     void          *entry_point;    /* 1c0 Thread entry point (was: unknown) */
  93     void          *entry_arg;      /* 1c4 Entry point arg (was: unknown) */
  94     DWORD          unknown5[4];    /* 1c8 Unknown */
  95     DWORD          sys_count[4];   /* 1d8 Syslevel mutex entry counters */
  96     CRITICAL_SECTION *sys_mutex[4];/* 1e8 Syslevel mutex pointers */
  97     DWORD          unknown6[2];    /* 1f8 Unknown */
  98     /* The following are Wine-specific fields */
  99     int            socket;         /* Socket for server communication */
 100     unsigned int   seq;            /* Server sequence number */
 101     void          *server_tid;     /* Server id for this thread */
 102     void         (*startup)(void); /* Thread startup routine */
 103     struct _THDB  *next;           /* Global thread list */
 104 } THDB;
 105
 106 /* The pseudo handle value returned by GetCurrentThread */
 107 #define CURRENT_THREAD_PSEUDOHANDLE 0xfffffffe
 108
 109 #ifdef __i386__
 110 /* On the i386, the current thread is in the %fs register */
 111 # define SET_CUR_THREAD(thdb) SET_FS((thdb)->teb_sel)
 112 #else
 113 extern THDB *pCurrentThread;
 114 # define SET_CUR_THREAD(thdb) (pCurrentThread = (thdb))
 115 #endif  /* __i386__ */
 116
 117
 118 /* scheduler/thread.c */
 119 extern THDB *THREAD_CreateInitialThread( struct _PDB *pdb, int server_fd );
 120 extern THDB *THREAD_Create( struct _PDB *pdb, DWORD flags,
 121                             DWORD stack_size, BOOL alloc_stack16,
 122                             LPSECURITY_ATTRIBUTES sa, int *server_handle );
 123 extern THDB *THREAD_Current(void);
 124 extern BOOL THREAD_IsWin16( THDB *thdb );
 125 extern THDB *THREAD_IdToTHDB( DWORD id );
 126
 127 /* scheduler/sysdeps.c */
 128 extern int SYSDEPS_SpawnThread( THDB *thread );
 129 extern void SYSDEPS_ExitThread(void);
 130 extern TEB * WINAPI NtCurrentTeb(void);
 131
 132 #endif  /* __WINE_THREAD_H */