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 "k32obj.h"
  12 #include "windows.h"
  13 #include "winbase.h"
  14 #include "winnt.h"
  15 #include "selectors.h"  /* for SET_FS */
  16
  17 #ifdef linux
  18 #define HAVE_CLONE_SYSCALL
  19 #endif
  20
  21 /* This is what we will use on *BSD, once threads using rfork() get
  22  * implemented:
  23  *
  24  * #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
  25  * #define HAVE_RFORK
  26  * #endif
  27  */
  28
  29 #if (defined(HAVE_CLONE_SYSCALL) || defined(HAVE_RFORK)) && !defined(NO_REENTRANT_LIBC)
  30 #define USE_THREADS
  31 #endif
  32
  33 struct _PDB32;
  34
  35 /* Thread exception block */
  36 typedef struct _TEB
  37 {
  38     void        *except;         /* 00 Head of exception handling chain */
  39     void        *stack_top;      /* 04 Top of thread stack */
  40     void        *stack_low;      /* 08 Stack low-water mark */
  41     HTASK16      htask16;        /* 0c Win16 task handle */
  42     WORD         stack_sel;      /* 0e 16-bit stack selector */
  43     DWORD        selman_list;    /* 10 Selector manager list */
  44     DWORD        user_ptr;       /* 14 User pointer */
  45     struct _TEB *self;           /* 18 Pointer to this structure */
  46     WORD         flags;          /* 1c Flags */
  47     WORD         mutex_count;    /* 1e Win16 mutex count */
  48     DWORD        debug_context;  /* 20 Debug context */
  49     DWORD       *ppriority;      /* 24 Pointer to current priority */
  50     HQUEUE16     queue;          /* 28 Message queue */
  51     WORD         pad1;           /* 2a */
  52     LPVOID      *tls_ptr;        /* 2c Pointer to TLS array */
  53     struct _PDB32 *process;      /* 30 owning process (used by NT3.51 applets)*/
  54 } TEB;
  55
  56 /* Thread exception flags */
  57 #define TEBF_WIN32  0x0001
  58 #define TEBF_TRAP   0x0002
  59
  60 /* Event waiting structure */
  61 typedef struct
  62 {
  63     DWORD         count;     /* Count of valid objects */
  64     DWORD         signaled;  /* Index of signaled object (or WAIT_FAILED)*/
  65     BOOL32        wait_all;  /* Wait for all objects flag */
  66     K32OBJ       *objs[MAXIMUM_WAIT_OBJECTS];  /* Object pointers */
  67     int           server[MAXIMUM_WAIT_OBJECTS];  /* Server handles */
  68 } WAIT_STRUCT;
  69
  70 /* Thread database */
  71 typedef struct _THDB
  72 {
  73     K32OBJ         header;         /*  00 Kernel object header */
  74     struct _PDB32 *process;        /*  08 Process owning this thread */
  75     HANDLE32       event;          /*  0c Thread event */
  76     TEB            teb;            /*  10 Thread exception block */
  77     DWORD          flags;          /*  44 Flags */
  78     DWORD          exit_code;      /*  48 Termination status */
  79     WORD           teb_sel;        /*  4c Selector to TEB */
  80     WORD           emu_sel;        /*  4e 80387 emulator selector */
  81     int            thread_errno;   /*  50 Per-thread errno (was: unknown) */
  82     WAIT_STRUCT   *wait_list;      /*  54 Event waiting list */
  83     int            thread_h_errno; /*  50 Per-thread h_errno (was: unknown) */
  84     void          *ring0_thread;   /*  5c Pointer to ring 0 thread */
  85     void          *ptdbx;          /*  60 Pointer to TDBX structure */
  86     void          *stack_base;     /*  64 Base of the stack */
  87     void          *exit_stack;     /*  68 Stack pointer on thread exit */
  88     void          *emu_data;       /*  6c Related to 80387 emulation */
  89     DWORD          last_error;     /*  70 Last error code */
  90     void          *debugger_CB;    /*  74 Debugger context block */
  91     DWORD          debug_thread;   /*  78 Thread debugging this one (?) */
  92     void          *pcontext;       /*  7c Thread register context */
  93     DWORD          cur_stack;      /*  80 Current stack (was: unknown) */
  94     DWORD          unknown3[2];    /*  84 Unknown */
  95     WORD           current_ss;     /*  8c Another 16-bit stack selector */
  96     WORD           pad2;           /*  8e */
  97     void          *ss_table;       /*  90 Pointer to info about 16-bit stack */
  98     WORD           thunk_ss;       /*  94 Yet another 16-bit stack selector */
  99     WORD           pad3;           /*  96 */
 100     LPVOID         tls_array[64];  /*  98 Thread local storage */
 101     DWORD          delta_priority; /* 198 Priority delta */
 102     DWORD          unknown4[7];    /* 19c Unknown */
 103     void          *create_data;    /* 1b8 Pointer to creation structure */
 104     DWORD          suspend_count;  /* 1bc SuspendThread() counter */
 105     void          *entry_point;    /* 1c0 Thread entry point (was: unknown) */
 106     void          *entry_arg;      /* 1c4 Entry point arg (was: unknown) */
 107     int            unix_pid;       /* 1c8 Unix thread pid (was: unknown) */
 108     DWORD          unknown5[3];    /* 1cc Unknown */
 109     DWORD          sys_count[4];   /* 1d8 Syslevel mutex entry counters */
 110     CRITICAL_SECTION *sys_mutex[4];/* 1e8 Syslevel mutex pointers */
 111     DWORD          unknown6[2];    /* 1f8 Unknown */
 112     /* The following are Wine-specific fields */
 113     CONTEXT        context;        /* 200 Thread context */
 114     WAIT_STRUCT    wait_struct;    /*     Event wait structure */
 115     int            socket;         /*     Socket for server communication */
 116     unsigned int   seq;            /*     Server sequence number */
 117     void          *server_tid;     /*     Server id for this thread */
 118 } THDB;
 119
 120
 121 /* Thread queue entry */
 122 typedef struct _THREAD_ENTRY
 123 {
 124     THDB                 *thread;
 125     struct _THREAD_ENTRY *next;
 126 } THREAD_ENTRY;
 127
 128 /* A thread queue is a circular list; a THREAD_QUEUE is a pointer */
 129 /* to the end of the queue (i.e. where we add elements) */
 130 typedef THREAD_ENTRY *THREAD_QUEUE;
 131
 132 /* THDB <-> Thread id conversion macros */
 133 #define THREAD_OBFUSCATOR       ((DWORD)0xdeadbeef)
 134 #define THREAD_ID_TO_THDB(id)   ((THDB *)((id) ^ THREAD_OBFUSCATOR))
 135 #define THDB_TO_THREAD_ID(thdb) ((DWORD)(thdb) ^ THREAD_OBFUSCATOR)
 136
 137 /* The pseudo handle value returned by GetCurrentThread */
 138 #define CURRENT_THREAD_PSEUDOHANDLE 0xfffffffe
 139
 140 #ifdef __i386__
 141 /* On the i386, the current thread is in the %fs register */
 142 # define SET_CUR_THREAD(thdb) SET_FS((thdb)->teb_sel)
 143 #else
 144 extern THDB *pCurrentThread;
 145 # define SET_CUR_THREAD(thdb) (pCurrentThread = (thdb))
 146 #endif  /* __i386__ */
 147
 148
 149 /* scheduler/thread.c */
 150 extern THDB *THREAD_Create( struct _PDB32 *pdb, DWORD stack_size,
 151                             BOOL32 alloc_stack16,
 152                             int *server_thandle, int *server_phandle,
 153                             LPTHREAD_START_ROUTINE start_addr, LPVOID param );
 154 extern THDB *THREAD_Current(void);
 155 extern BOOL32 THREAD_IsWin16( THDB *thdb );
 156 extern THDB *THREAD_IdToTHDB( DWORD id );
 157 extern void THREAD_Start( THDB *thdb );
 158 extern THDB *THREAD_GetPtr( HANDLE32 handle, DWORD access, int *server_handle );
 159 extern void THREAD_AddQueue( THREAD_QUEUE *queue, THDB *thread );
 160 extern void THREAD_RemoveQueue( THREAD_QUEUE *queue, THDB *thread );
 161 extern DWORD THREAD_TlsAlloc( THDB *thread );
 162
 163 /* scheduler/sysdeps.c */
 164 extern int SYSDEPS_SpawnThread( THDB *thread );
 165 extern void SYSDEPS_ExitThread(void);
 166 extern TEB * WINAPI NtCurrentTeb(void);
 167
 168 #endif  /* __WINE_THREAD_H */