MySQL 8.0.32
Source Code Documentation
xcom_input_request.h
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1/* Copyright (c) 2018, 2022, Oracle and/or its affiliates.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
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7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
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14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22
23#ifndef XCOM_INPUT_REQUEST_H
24#define XCOM_INPUT_REQUEST_H
25
26#include "xcom/pax_msg.h"
27
28/**
29 * A request directed to XCom through the input channel.
30 */
33
34/**
35 * The function type that XCom will use to reply to a request.
36 */
38 pax_msg *payload);
39
40/**
41 * Creates a new XCom request.
42 *
43 * Takes ownership of @c a.
44 *
45 * @param a the request's app_data payload
46 * @param reply_function the function used to reply to the request
47 * @param reply_arg opaque argument to the reply_function
48 * @retval xcom_input_request_ptr if successful
49 * @retval NULL if unsuccessful
50 */
53 void *reply_arg);
54
55/**
56 * Frees the given request and its payload.
57 *
58 * @param request the request to free
59 */
61
62/**
63 * Links @c request to the list of requests @c next.
64 *
65 * @param request the request to link
66 * @param next the list to be linked to
67 */
70
71/**
72 * Unlinks @c request from its list.
73 *
74 * @param request the request to unlink
75 * @returns the tail of the list the request was unlinked from
76 */
79
80/**
81 * Extract the given request's payload.
82 *
83 * Transfers ownership of the result to the caller.
84 *
85 * @param request the request from which to extract the payload
86 * @returns the request's app_data payload
87 */
90
91/**
92 * Replies to the request using the strategy chosen by the request's origin.
93 *
94 * @param request the request to reply to
95 * @param payload the payload of the reply
96 */
98
99#endif /* XCOM_INPUT_REQUEST_H */
struct pax_msg pax_msg
Definition: site_struct.h:36
Definition: xcom_input_request.cc:30
xcom_input_reply_function_ptr reply_function
Definition: xcom_input_request.cc:32
app_data_ptr a
Definition: xcom_input_request.cc:31
void * reply_arg
Definition: xcom_input_request.cc:33
struct xcom_input_request * next
Definition: xcom_input_request.cc:34
void xcom_input_request_set_next(xcom_input_request_ptr request, xcom_input_request_ptr next)
Links request to the list of requests next.
Definition: xcom_input_request.cc:62
xcom_input_request_ptr xcom_input_request_extract_next(xcom_input_request_ptr request)
Unlinks request from its list.
Definition: xcom_input_request.cc:67
void xcom_input_request_reply(xcom_input_request_ptr request, pax_msg *payload)
Replies to the request using the strategy chosen by the request's origin.
Definition: xcom_input_request.cc:81
xcom_input_request_ptr xcom_input_request_new(app_data_ptr a, xcom_input_reply_function_ptr reply_function, void *reply_arg)
Creates a new XCom request.
Definition: xcom_input_request.cc:37
app_data_ptr xcom_input_request_extract_app_data(xcom_input_request_ptr request)
Extract the given request's payload.
Definition: xcom_input_request.cc:74
void xcom_input_request_free(xcom_input_request_ptr request)
Frees the given request and its payload.
Definition: xcom_input_request.cc:50
struct xcom_input_request * xcom_input_request_ptr
Definition: xcom_input_request.h:32
void(* xcom_input_reply_function_ptr)(void *reply_arg, pax_msg *payload)
The function type that XCom will use to reply to a request.
Definition: xcom_input_request.h:37