winsup/cygwin/local_includes/cygserver_msg.h

   1 /* cygserver_msg.h: Single unix specification IPC interface for Cygwin.
   2
   3 This file is part of Cygwin.
   4
   5 This software is a copyrighted work licensed under the terms of the
   6 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   7 details. */
   8
   9 #ifndef __CYGSERVER_MSG_H__
  10 #define __CYGSERVER_MSG_H__
  11
  12 #include <sys/types.h>
  13 #include <sys/sysproto.h>
  14 #ifndef _KERNEL
  15 #define _KERNEL 1
  16 #endif
  17 #include <cygwin/msg.h>
  18
  19 #include "cygserver.h"
  20 #include "cygserver_ipc.h"
  21
  22 #ifndef __INSIDE_CYGWIN__
  23 class transport_layer_base;
  24 class process_cache;
  25 #endif
  26
  27 class client_request_msg : public client_request
  28 {
  29   friend class client_request;
  30
  31 public:
  32   enum msgop_t
  33     {
  34       MSGOP_msgctl,
  35       MSGOP_msgget,
  36       MSGOP_msgrcv,
  37       MSGOP_msgsnd
  38     };
  39
  40 private:
  41   union
  42   {
  43     struct
  44     {
  45       msgop_t msgop;
  46       proc ipcblk;
  47       union
  48       {
  49         struct msgctl_args ctlargs;
  50         struct msgget_args getargs;
  51         struct msgrcv_args rcvargs;
  52         struct msgsnd_args sndargs;
  53       };
  54     } in;
  55
  56     union {
  57       int ret;
  58       ssize_t rcv;
  59     } out;
  60   } _parameters;
  61
  62 #ifndef __INSIDE_CYGWIN__
  63   client_request_msg ();
  64   virtual void serve (transport_layer_base *, process_cache *);
  65 #endif
  66
  67 public:
  68
  69 #ifdef __INSIDE_CYGWIN__
  70   client_request_msg (int, int, struct msqid_ds *);     // msgctl
  71   client_request_msg (key_t, int);                      // msgget
  72   client_request_msg (int, void *, size_t, long, int);  // msgrcv
  73   client_request_msg (int, const void *, size_t, int);  // msgsnd
  74 #endif
  75
  76   int retval () const { return msglen () ? _parameters.out.ret : -1; }
  77   ssize_t rcvval () const { return _parameters.out.rcv; }
  78 };
  79
  80 #ifndef __INSIDE_CYGWIN__
  81 int msginit ();
  82 int msgunload ();
  83 int msgctl (struct thread *, struct msgctl_args *);
  84 int msgget (struct thread *, struct msgget_args *);
  85 int msgsnd (struct thread *, struct msgsnd_args *);
  86 int msgrcv (struct thread *, struct msgrcv_args *);
  87 #endif
  88
  89 #endif /* __CYGSERVER_MSG_H__ */