89296ed4e4
Single spot where an existing hint ptr was overwritten. Removed gwbuf_add_hint() because it was adding hints at the opposite end compared to functions in hint.h. Added hint_splice() to replace.
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
#pragma once
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2020-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file hint.h The generic hint data that may be attached to buffers
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*/
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#include <maxscale/cdefs.h>
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#include <maxscale/debug.h>
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MXS_BEGIN_DECLS
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/**
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* The types of hint that are supported by the generic hinting mechanism.
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*/
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typedef enum
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{
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HINT_ROUTE_TO_MASTER = 1,
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HINT_ROUTE_TO_SLAVE,
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HINT_ROUTE_TO_NAMED_SERVER,
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HINT_ROUTE_TO_UPTODATE_SERVER, /*< not supported by RWSplit and HintRouter */
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HINT_ROUTE_TO_ALL, /*< not supported by RWSplit, supported by HintRouter */
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HINT_PARAMETER
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} HINT_TYPE;
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/**
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* A generic hint.
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*
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* A hint has a type associated with it and may optionally have hint
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* specific data.
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* Multiple hints may be attached to a single buffer.
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*/
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typedef struct hint
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{
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HINT_TYPE type; /*< The Type of hint */
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void *data; /*< Type specific data */
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void *value; /*< Parameter value for hint */
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unsigned int dsize; /*< Size of the hint data */
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struct hint *next; /*< Another hint for this buffer */
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} HINT;
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HINT *hint_alloc(HINT_TYPE, void *, unsigned int);
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HINT *hint_create_parameter(HINT *, char *, const char *);
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HINT *hint_create_route(HINT *, HINT_TYPE, const char *);
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HINT *hint_splice(HINT *head, HINT *list);
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void hint_free(HINT *);
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HINT *hint_dup(const HINT *);
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bool hint_exists(HINT **, HINT_TYPE);
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MXS_END_DECLS
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