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 int debug_break; /* debug breakpoint pending? */
60 struct msg_queue *queue; /* message queue */
61 struct thread_wait *wait; /* current wait condition if sleeping */
62 struct list system_apc; /* queue of system async procedure calls */
63 struct list user_apc; /* queue of user async procedure calls */
64 struct inflight_fd inflight[MAX_INFLIGHT_FDS]; /* fds currently in flight */
65 unsigned int error; /* current error code */
66 union generic_request req; /* current request */
67 void *req_data; /* variable-size data for request */
68 unsigned int req_toread; /* amount of data still to read in request */
69 void *reply_data; /* variable-size data for reply */
70 unsigned int reply_size; /* size of reply data */
71 unsigned int reply_towrite; /* amount of data still to write in reply */
72 struct fd *request_fd; /* fd for receiving client requests */
73 struct fd *reply_fd; /* fd to send a reply to a client */
74 struct fd *wait_fd; /* fd to use to wake a sleeping client */
75 enum run_state state; /* running state */
76 int exit_code; /* thread exit code */
77 int unix_pid; /* Unix pid of client */
78 int unix_tid; /* Unix tid of client */
79 CONTEXT *context; /* current context if in an exception handler */
80 CONTEXT *suspend_context; /* current context if suspended */
81 void *teb; /* TEB address (in client address space) */
82 int priority; /* priority level */
83 unsigned int affinity; /* affinity mask */
84 int suspend; /* suspend count */
85 obj_handle_t desktop; /* desktop handle */
86 int desktop_users; /* number of objects using the thread desktop */
87 timeout_t creation_time; /* Thread creation time */
88 timeout_t exit_time; /* Thread exit time */
89 struct token *token; /* security token associated with this thread */
90 };
91
92 struct thread_snapshot
93 {
94 struct thread *thread; /* thread ptr */
95 int count; /* thread refcount */
96 int priority; /* priority class */
97 };
98
99 extern struct thread *current;
100
101 /* thread functions */
102
103 extern struct thread *create_thread( int fd, struct process *process );
104 extern struct thread *get_thread_from_id( thread_id_t id );
105 extern struct thread *get_thread_from_handle( obj_handle_t handle, unsigned int access );
106 extern struct thread *get_thread_from_tid( int tid );
107 extern struct thread *get_thread_from_pid( int pid );
108 extern void stop_thread( struct thread *thread );
109 extern int wake_thread( struct thread *thread );
110 extern int add_queue( struct object *obj, struct wait_queue_entry *entry );
111 extern void remove_queue( struct object *obj, struct wait_queue_entry *entry );
112 extern void kill_thread( struct thread *thread, int violent_death );
113 extern void break_thread( struct thread *thread );
114 extern void wake_up( struct object *obj, int max );
115 extern int thread_queue_apc( struct thread *thread, struct object *owner, const apc_call_t *call_data );
116 extern void thread_cancel_apc( struct thread *thread, struct object *owner, enum apc_type type );
117 extern int thread_add_inflight_fd( struct thread *thread, int client, int server );
118 extern int thread_get_inflight_fd( struct thread *thread, int client );
119 extern struct thread_snapshot *thread_snap( int *count );
120 extern struct token *thread_get_impersonation_token( struct thread *thread );
121
122 /* CPU context functions */
123 extern void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags );
124 extern void *get_context_ip( const CONTEXT *context );
125 extern unsigned int get_context_cpu_flag(void);
126 extern unsigned int get_context_system_regs( unsigned int flags );
127
128 /* ptrace functions */
129
130 extern void sigchld_callback(void);
131 extern void get_thread_context( struct thread *thread, CONTEXT *context, unsigned int flags );
132 extern void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned int flags );
133 extern int send_thread_signal( struct thread *thread, int sig );
134 extern void get_selector_entry( struct thread *thread, int entry, unsigned int *base,
135 unsigned int *limit, unsigned char *flags );
136
137 extern unsigned int global_error; /* global error code for when no thread is current */
138
139 static inline unsigned int get_error(void) { return current ? current->error : global_error; }
140 static inline void set_error( unsigned int err ) { global_error = err; if (current) current->error = err; }
141 static inline void clear_error(void) { set_error(0); }
142 static inline void set_win32_error( unsigned int err ) { set_error( 0xc0010000 | err ); }
143
144 static inline thread_id_t get_thread_id( struct thread *thread ) { return thread->id; }
145
146 #endif /* __WINE_SERVER_THREAD_H */
147
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