server/thread.h

   1 /*
   2  * Wine server threads
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifndef __WINE_SERVER_THREAD_H
  22 #define __WINE_SERVER_THREAD_H
  23
  24 #include "object.h"
  25
  26 /* thread structure */
  27
  28 struct process;
  29 struct thread_wait;
  30 struct thread_apc;
  31 struct debug_ctx;
  32 struct debug_event;
  33 struct msg_queue;
  34
  35 enum run_state
  36 {
  37     RUNNING,    /* running normally */
  38     TERMINATED  /* terminated */
  39 };
  40
  41 /* descriptor for fds currently in flight from client to server */
  42 struct inflight_fd
  43 {
  44     int client;  /* fd on the client side (or -1 if entry is free) */
  45     int server;  /* fd on the server side */
  46 };
  47 #define MAX_INFLIGHT_FDS 16  /* max number of fds in flight per thread */
  48
  49 struct thread
  50 {
  51     struct object          obj;           /* object header */
  52     struct list            entry;         /* entry in system-wide thread list */
  53     struct list            proc_entry;    /* entry in per-process thread list */
  54     struct process        *process;
  55     thread_id_t            id;            /* thread id */
  56     struct list            mutex_list;    /* list of currently owned mutexes */
  57     struct debug_ctx      *debug_ctx;     /* debugger context if this thread is a debugger */
  58     struct debug_event    *debug_event;   /* debug event being sent to debugger */
  59     struct msg_queue      *queue;         /* message queue */
  60     struct thread_wait    *wait;          /* current wait condition if sleeping */
  61     struct list            system_apc;    /* queue of system async procedure calls */
  62     struct list            user_apc;      /* queue of user async procedure calls */
  63     struct inflight_fd     inflight[MAX_INFLIGHT_FDS];  /* fds currently in flight */
  64     unsigned int           error;         /* current error code */
  65     union generic_request  req;           /* current request */
  66     void                  *req_data;      /* variable-size data for request */
  67     unsigned int           req_toread;    /* amount of data still to read in request */
  68     void                  *reply_data;    /* variable-size data for reply */
  69     unsigned int           reply_size;    /* size of reply data */
  70     unsigned int           reply_towrite; /* amount of data still to write in reply */
  71     struct fd             *request_fd;    /* fd for receiving client requests */
  72     struct fd             *reply_fd;      /* fd to send a reply to a client */
  73     struct fd             *wait_fd;       /* fd to use to wake a sleeping client */
  74     enum run_state         state;         /* running state */
  75     int                    exit_code;     /* thread exit code */
  76     int                    unix_pid;      /* Unix pid of client */
  77     int                    unix_tid;      /* Unix tid of client */
  78     CONTEXT               *context;       /* current context if in an exception handler */
  79     CONTEXT               *suspend_context; /* current context if suspended */
  80     void                  *teb;           /* TEB address (in client address space) */
  81     int                    priority;      /* priority level */
  82     int                    affinity;      /* affinity mask */
  83     int                    suspend;       /* suspend count */
  84     obj_handle_t           desktop;       /* desktop handle */
  85     int                    desktop_users; /* number of objects using the thread desktop */
  86     timeout_t              creation_time; /* Thread creation time */
  87     timeout_t              exit_time;     /* Thread exit time */
  88     struct token          *token;         /* security token associated with this thread */
  89 };
  90
  91 struct thread_snapshot
  92 {
  93     struct thread  *thread;    /* thread ptr */
  94     int             count;     /* thread refcount */
  95     int             priority;  /* priority class */
  96 };
  97
  98 extern struct thread *current;
  99
 100 /* thread functions */
 101
 102 extern struct thread *create_thread( int fd, struct process *process );
 103 extern struct thread *get_thread_from_id( thread_id_t id );
 104 extern struct thread *get_thread_from_handle( obj_handle_t handle, unsigned int access );
 105 extern struct thread *get_thread_from_tid( int tid );
 106 extern struct thread *get_thread_from_pid( int pid );
 107 extern void stop_thread( struct thread *thread );
 108 extern int wake_thread( struct thread *thread );
 109 extern int add_queue( struct object *obj, struct wait_queue_entry *entry );
 110 extern void remove_queue( struct object *obj, struct wait_queue_entry *entry );
 111 extern void kill_thread( struct thread *thread, int violent_death );
 112 extern void wake_up( struct object *obj, int max );
 113 extern int thread_queue_apc( struct thread *thread, struct object *owner, const apc_call_t *call_data );
 114 extern void thread_cancel_apc( struct thread *thread, struct object *owner, enum apc_type type );
 115 extern int thread_add_inflight_fd( struct thread *thread, int client, int server );
 116 extern int thread_get_inflight_fd( struct thread *thread, int client );
 117 extern struct thread_snapshot *thread_snap( int *count );
 118 extern struct token *thread_get_impersonation_token( struct thread *thread );
 119
 120 /* CPU context functions */
 121 extern void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags );
 122 extern void *get_context_ip( const CONTEXT *context );
 123 extern unsigned int get_context_cpu_flag(void);
 124 extern unsigned int get_context_system_regs( unsigned int flags );
 125
 126 /* ptrace functions */
 127
 128 extern void sigchld_callback(void);
 129 extern void get_thread_context( struct thread *thread, CONTEXT *context, unsigned int flags );
 130 extern void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned int flags );
 131 extern int send_thread_signal( struct thread *thread, int sig );
 132 extern void get_selector_entry( struct thread *thread, int entry, unsigned int *base,
 133                                 unsigned int *limit, unsigned char *flags );
 134
 135 extern unsigned int global_error;  /* global error code for when no thread is current */
 136
 137 static inline unsigned int get_error(void)       { return current ? current->error : global_error; }
 138 static inline void set_error( unsigned int err ) { global_error = err; if (current) current->error = err; }
 139 static inline void clear_error(void)             { set_error(0); }
 140 static inline void set_win32_error( unsigned int err ) { set_error( 0xc0010000 | err ); }
 141
 142 static inline thread_id_t get_thread_id( struct thread *thread ) { return thread->id; }
 143
 144 #endif  /* __WINE_SERVER_THREAD_H */