include/shm_main_blk.h

   1 /***************************************************************************
   2  * Copyright 1995, Technion, Israel Institute of Technology
   3  * Electrical Eng, Software Lab.
   4  * Author:    Michael Veksler.
   5  ***************************************************************************
   6  * File:      shm_main_blk.h
   7  * Purpose:   Main Wine's shared memory block
   8  ***************************************************************************
   9  */
  10 #ifndef __WINE_SHM_MAIN_BLK_H
  11 #define __WINE_SHM_MAIN_BLK_H
  12
  13 #ifdef CONFIG_IPC
  14
  15 #include <sys/shm.h>
  16 #include "shm_block.h"
  17 #include "shm_semaph.h"
  18 #include "dde_proc.h"
  19 #include "dde_atom.h"
  20 #include "dde_mem.h"
  21 /*****************************************************************************
  22  *
  23  * main block object
  24  *
  25  *****************************************************************************
  26  */
  27
  28 #define DDE_HANDLES_BIT_ARRAY_SIZE (DDE_HANDLES/sizeof(int)/8)
  29
  30 #define SHM_MAXID SHMSEG        /* maximum shm blocks (Wine's limit) */
  31 struct shm_main_block {
  32         /* NOTE:  "block" declaration must be the first */
  33         struct shm_block block;
  34         char magic[64];            /* magic string to identify the block */
  35         int build_lock;            /* =1 when data structure not stable yet */
  36         shm_sem sem;               /* semaphores for main_block integrity */
  37         struct _dde_proc proc[DDE_PROCS];  /* information about processes  */
  38         REL_PTR atoms[DDE_ATOMS];  /* relative reference to global atoms */
  39         /* Translation from global window handles to local handles */
  40         WND_DATA windows[DDE_WINDOWS];
  41         DDE_HWND handles[DDE_HANDLES];
  42         /* bit array stating if a handle is free (bit=0), LSB in */
  43         /* free_handles[0] refers handle 0x8000, the MSB refers 0x801F */
  44         unsigned free_handles[DDE_HANDLES_BIT_ARRAY_SIZE];
  45 };
  46 extern struct shm_main_block *main_block;
  47 int shm_init(void);
  48 void shm_delete_all(int shm_id);
  49 void DDE_mem_init();
  50 int DDE_no_of_attached();
  51 #define DDE_IPC_init()  ( (main_block==NULL) ?  (DDE_mem_init()) : 0 )
  52
  53 #endif  /* CONFIG_IPC */
  54
  55 #endif /* __WINE_SHM_MAIN_BLK_H */