release/src/router/mysql/storage/innobase/include/usr0sess.h

   1 /******************************************************
   2 Sessions
   3
   4 (c) 1996 Innobase Oy
   5
   6 Created 6/25/1996 Heikki Tuuri
   7 *******************************************************/
   8
   9 #ifndef usr0sess_h
  10 #define usr0sess_h
  11
  12 #include "univ.i"
  13 #include "ut0byte.h"
  14 #include "trx0types.h"
  15 #include "srv0srv.h"
  16 #include "trx0types.h"
  17 #include "usr0types.h"
  18 #include "que0types.h"
  19 #include "data0data.h"
  20 #include "rem0rec.h"
  21
  22 /*************************************************************************
  23 Opens a session. */
  24
  25 sess_t*
  26 sess_open(void);
  27 /*============*/
  28                                         /* out, own: session object */
  29 /*************************************************************************
  30 Closes a session, freeing the memory occupied by it, if it is in a state
  31 where it should be closed. */
  32
  33 ibool
  34 sess_try_close(
  35 /*===========*/
  36                                 /* out: TRUE if closed */
  37         sess_t*         sess);  /* in, own: session object */
  38
  39 /* The session handle. All fields are protected by the kernel mutex */
  40 struct sess_struct{
  41         ulint           state;          /* state of the session */
  42         trx_t*          trx;            /* transaction object permanently
  43                                         assigned for the session: the
  44                                         transaction instance designated by the
  45                                         trx id changes, but the memory
  46                                         structure is preserved */
  47         UT_LIST_BASE_NODE_T(que_t)
  48                         graphs;         /* query graphs belonging to this
  49                                         session */
  50 };
  51
  52 /* Session states */
  53 #define SESS_ACTIVE             1
  54 #define SESS_ERROR              2       /* session contains an error message
  55                                         which has not yet been communicated
  56                                         to the client */
  57 #ifndef UNIV_NONINL
  58 #include "usr0sess.ic"
  59 #endif
  60
  61 #endif