include/wine/server.h

   1 /*
   2  * Definitions for the client side of the Wine server communication
   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_WINE_SERVER_H
  22 #define __WINE_WINE_SERVER_H
  23
  24 #include <stdarg.h>
  25 #include <windef.h>
  26 #include <winbase.h>
  27 #include <winternl.h>
  28 #include <wine/server_protocol.h>
  29
  30 /* client communication functions */
  31
  32 struct __server_iovec
  33 {
  34     const void  *ptr;
  35     data_size_t  size;
  36 };
  37
  38 #define __SERVER_MAX_DATA 5
  39
  40 struct __server_request_info
  41 {
  42     union
  43     {
  44         union generic_request req;    /* request structure */
  45         union generic_reply   reply;  /* reply structure */
  46     } u;
  47     unsigned int          data_count; /* count of request data pointers */
  48     void                 *reply_data; /* reply data pointer */
  49     struct __server_iovec data[__SERVER_MAX_DATA];  /* request variable size data */
  50 };
  51
  52 extern unsigned int CDECL wine_server_call( void *req_ptr );
  53 extern NTSTATUS CDECL wine_server_fd_to_handle( int fd, unsigned int access, unsigned int attributes, HANDLE *handle );
  54 extern NTSTATUS CDECL wine_server_handle_to_fd( HANDLE handle, unsigned int access, int *unix_fd, unsigned int *options );
  55
  56 /* do a server call and set the last error code */
  57 static inline unsigned int wine_server_call_err( void *req_ptr )
  58 {
  59     unsigned int res = wine_server_call( req_ptr );
  60     if (res) SetLastError( RtlNtStatusToDosError(res) );
  61     return res;
  62 }
  63
  64 /* get the size of the variable part of the returned reply */
  65 static inline data_size_t wine_server_reply_size( const void *reply )
  66 {
  67     return ((const struct reply_header *)reply)->reply_size;
  68 }
  69
  70 /* add some data to be sent along with the request */
  71 static inline void wine_server_add_data( void *req_ptr, const void *ptr, data_size_t size )
  72 {
  73     struct __server_request_info * const req = req_ptr;
  74     if (size)
  75     {
  76         req->data[req->data_count].ptr = ptr;
  77         req->data[req->data_count++].size = size;
  78         req->u.req.request_header.request_size += size;
  79     }
  80 }
  81
  82 /* set the pointer and max size for the reply var data */
  83 static inline void wine_server_set_reply( void *req_ptr, void *ptr, data_size_t max_size )
  84 {
  85     struct __server_request_info * const req = req_ptr;
  86     req->reply_data = ptr;
  87     req->u.req.request_header.reply_size = max_size;
  88 }
  89
  90 /* convert an object handle to a server handle */
  91 static inline obj_handle_t wine_server_obj_handle( HANDLE handle )
  92 {
  93     if ((int)(INT_PTR)handle != (INT_PTR)handle) return 0xfffffff0;  /* some invalid handle */
  94     return (INT_PTR)handle;
  95 }
  96
  97 /* convert a user handle to a server handle */
  98 static inline user_handle_t wine_server_user_handle( HANDLE handle )
  99 {
 100     return (UINT_PTR)handle;
 101 }
 102
 103 /* convert a server handle to a generic handle */
 104 static inline HANDLE wine_server_ptr_handle( obj_handle_t handle )
 105 {
 106     return (HANDLE)(INT_PTR)(int)handle;
 107 }
 108
 109 /* convert a client pointer to a server client_ptr_t */
 110 static inline client_ptr_t wine_server_client_ptr( const void *ptr )
 111 {
 112     return (client_ptr_t)(ULONG_PTR)ptr;
 113 }
 114
 115 /* convert a server client_ptr_t to a real pointer */
 116 static inline void *wine_server_get_ptr( client_ptr_t ptr )
 117 {
 118     return (void *)(ULONG_PTR)ptr;
 119 }
 120
 121
 122 /* macros for server requests */
 123
 124 #define SERVER_START_REQ(type) \
 125     do { \
 126         struct __server_request_info __req; \
 127         struct type##_request * const req = &__req.u.req.type##_request; \
 128         const struct type##_reply * const reply = &__req.u.reply.type##_reply; \
 129         memset( &__req.u.req, 0, sizeof(__req.u.req) ); \
 130         __req.u.req.request_header.req = REQ_##type; \
 131         __req.data_count = 0; \
 132         (void)reply; \
 133         do
 134
 135 #define SERVER_END_REQ \
 136         while(0); \
 137     } while(0)
 138
 139
 140 #endif  /* __WINE_WINE_SERVER_H */