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by Vadim Tkachenko
New rw-locks |
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/******************************************************
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Sessions
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(c) 1996 Innobase Oy
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Created 6/25/1996 Heikki Tuuri
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*******************************************************/
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#ifndef usr0sess_h
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#define usr0sess_h
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#include "univ.i" |
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#include "ut0byte.h" |
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#include "trx0types.h" |
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#include "srv0srv.h" |
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#include "trx0types.h" |
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#include "usr0types.h" |
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#include "que0types.h" |
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#include "data0data.h" |
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#include "rem0rec.h" |
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/*************************************************************************
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Opens a session. */
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UNIV_INTERN
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sess_t* |
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sess_open(void); |
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/*============*/
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/* out, own: session object */
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/*************************************************************************
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Closes a session, freeing the memory occupied by it, if it is in a state
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where it should be closed. */
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UNIV_INTERN
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ibool
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sess_try_close( |
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/*===========*/
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/* out: TRUE if closed */
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sess_t* sess); /* in, own: session object */ |
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/* The session handle. All fields are protected by the kernel mutex */
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struct sess_struct{ |
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ulint state; /* state of the session */ |
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trx_t* trx; /* transaction object permanently |
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assigned for the session: the
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transaction instance designated by the
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trx id changes, but the memory
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structure is preserved */
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UT_LIST_BASE_NODE_T(que_t) |
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graphs; /* query graphs belonging to this |
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session */
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};
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/* Session states */
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#define SESS_ACTIVE 1
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#define SESS_ERROR 2 /* session contains an error message |
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which has not yet been communicated
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to the client */
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#ifndef UNIV_NONINL
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#include "usr0sess.ic" |
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#endif
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#endif
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