1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#pragma once
#include <isc/mem.h>
#include <isc/result.h>
#include <isc/task.h>
isc_result_t
isc__taskmgr_create(isc_mem_t *mctx, unsigned int default_quantum, isc_nm_t *nm,
isc_taskmgr_t **managerp);
/*%<
* Create a new task manager.
*
* Notes:
*
*\li If 'default_quantum' is non-zero, then it will be used as the default
* quantum value when tasks are created. If zero, then an implementation
* defined default quantum will be used.
*
*\li If 'nm' is set then netmgr is paused when an exclusive task mode
* is requested.
*
* Requires:
*
*\li 'mctx' is a valid memory context.
*
*\li managerp != NULL && *managerp == NULL
*
* Ensures:
*
*\li On success, '*managerp' will be attached to the newly created task
* manager.
*
* Returns:
*
*\li #ISC_R_SUCCESS
*\li #ISC_R_NOMEMORY
*\li #ISC_R_NOTHREADS No threads could be created.
*\li #ISC_R_UNEXPECTED An unexpected error occurred.
*\li #ISC_R_SHUTTINGDOWN The non-threaded, shared, task
* manager shutting down.
*/
void
isc__taskmgr_destroy(isc_taskmgr_t **managerp);
/*%<
* Destroy '*managerp'.
*
* Notes:
*
*\li Calling isc_taskmgr_destroy() will shutdown all tasks managed by
* *managerp that haven't already been shutdown. The call will block
* until all tasks have entered the done state.
*
*\li isc_taskmgr_destroy() must not be called by a task event action,
* because it would block forever waiting for the event action to
* complete. An event action that wants to cause task manager shutdown
* should request some non-event action thread of execution to do the
* shutdown, e.g. by signaling a condition variable or using
* isc_app_shutdown().
*
*\li Task manager references are not reference counted, so the caller
* must ensure that no attempt will be made to use the manager after
* isc_taskmgr_destroy() returns.
*
* Requires:
*
*\li '*managerp' is a valid task manager.
*
*\li 'isc__taskmgr_shutdown()' and isc__netmgr_shutdown() have been
* called.
*/
void
isc__taskmgr_shutdown(isc_taskmgr_t *manager);
/*%>
* Shutdown 'manager'.
*
* Notes:
*
*\li Calling isc__taskmgr_shutdown() will shut down all tasks managed by
* *managerp that haven't already been shut down.
*
* Requires:
*
*\li 'manager' is a valid task manager.
*
*\li isc_taskmgr_destroy() has not be called previously on '*managerp'.
*
* Ensures:
*
*\li All resources used by the task manager, and any tasks it managed,
* have been freed.
*/
|
