source: mainline/uspace/lib/c/include/fibril_synch.h@ c64e254

Last change on this file since c64e254 was bc56f30, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 6 years ago

Make some libc and libposix headers usable in C++

These headers either get included from standard C++ headers,
or are standard themselves, which means any unnamespaced nonstandard
identifiers are a problem. This commit attempts to fix those
issues, and removes hacks previously used in libcpp to work around it.
  • Property mode set to 100644
File size: 6.2 KB
Line 
1/*
2 * Copyright (c) 2009 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libc
30 * @{
31 */
32/** @file
33 */
34
35#ifndef _LIBC_FIBRIL_SYNCH_H_
36#define _LIBC_FIBRIL_SYNCH_H_
37
38#include <fibril.h>
39#include <adt/list.h>
40#include <time.h>
41#include <stdbool.h>
42#include <_bits/decls.h>
43
44#ifndef __cplusplus
45
46#define FIBRIL_MUTEX_INITIALIZER(name) \
47 { \
48 .oi = { \
49 .owned_by = NULL \
50 }, \
51 .counter = 1, \
52 .waiters = LIST_INITIALIZER((name).waiters), \
53 }
54
55#define FIBRIL_MUTEX_INITIALIZE(name) \
56 fibril_mutex_t name = FIBRIL_MUTEX_INITIALIZER(name)
57
58#define FIBRIL_RWLOCK_INITIALIZER(name) \
59 { \
60 .oi = { \
61 .owned_by = NULL \
62 }, \
63 .readers = 0, \
64 .writers = 0, \
65 .waiters = LIST_INITIALIZER((name).waiters), \
66 }
67
68#define FIBRIL_RWLOCK_INITIALIZE(name) \
69 fibril_rwlock_t name = FIBRIL_RWLOCK_INITIALIZER(name)
70
71#define FIBRIL_CONDVAR_INITIALIZER(name) \
72 { \
73 .waiters = LIST_INITIALIZER((name).waiters), \
74 }
75
76#define FIBRIL_CONDVAR_INITIALIZE(name) \
77 fibril_condvar_t name = FIBRIL_CONDVAR_INITIALIZER(name)
78
79#define FIBRIL_SEMAPHORE_INITIALIZER(name, cnt) \
80 { \
81 .count = (cnt), \
82 .waiters = LIST_INITIALIZER((name).waiters), \
83 }
84
85#define FIBRIL_SEMAPHORE_INITIALIZE(name, cnt) \
86 fibril_semaphore_t name = FIBRIL_SEMAPHORE_INITIALIZER(name, cnt)
87
88#endif
89
90__HELENOS_DECLS_BEGIN;
91
92typedef struct {
93 fibril_owner_info_t oi; /**< Keep this the first thing. */
94 int counter;
95 list_t waiters;
96} fibril_mutex_t;
97
98typedef struct {
99 fibril_owner_info_t oi; /**< Keep this the first thing. */
100 unsigned int writers;
101 unsigned int readers;
102 list_t waiters;
103} fibril_rwlock_t;
104
105typedef struct {
106 list_t waiters;
107} fibril_condvar_t;
108
109typedef void (*fibril_timer_fun_t)(void *);
110
111typedef enum {
112 /** Timer has not been set or has been cleared */
113 fts_not_set,
114 /** Timer was set but did not fire yet */
115 fts_active,
116 /** Timer has fired and has not been cleared since */
117 fts_fired,
118 /** Timer fibril is requested to terminate */
119 fts_cleanup,
120 /** Timer fibril acknowledged termination */
121 fts_clean
122} fibril_timer_state_t;
123
124/** Fibril timer.
125 *
126 * When a timer is set it executes a callback function (in a separate
127 * fibril) after a specified time interval. The timer can be cleared
128 * (canceled) before that. From the return value of fibril_timer_clear()
129 * one can tell whether the timer fired or not.
130 */
131typedef struct {
132 fibril_mutex_t lock;
133 fibril_mutex_t *lockp;
134 fibril_condvar_t cv;
135 fid_t fibril;
136 fibril_timer_state_t state;
137 /** FID of fibril executing handler or 0 if handler is not running */
138 fid_t handler_fid;
139
140 usec_t delay;
141 fibril_timer_fun_t fun;
142 void *arg;
143} fibril_timer_t;
144
145/** A counting semaphore for fibrils. */
146typedef struct {
147 long int count;
148 list_t waiters;
149 bool closed;
150} fibril_semaphore_t;
151
152extern void __fibril_synch_init(void);
153extern void __fibril_synch_fini(void);
154
155extern void fibril_mutex_initialize(fibril_mutex_t *);
156extern void fibril_mutex_lock(fibril_mutex_t *);
157extern bool fibril_mutex_trylock(fibril_mutex_t *);
158extern void fibril_mutex_unlock(fibril_mutex_t *);
159extern bool fibril_mutex_is_locked(fibril_mutex_t *);
160
161extern void fibril_rwlock_initialize(fibril_rwlock_t *);
162extern void fibril_rwlock_read_lock(fibril_rwlock_t *);
163extern void fibril_rwlock_write_lock(fibril_rwlock_t *);
164extern void fibril_rwlock_read_unlock(fibril_rwlock_t *);
165extern void fibril_rwlock_write_unlock(fibril_rwlock_t *);
166extern bool fibril_rwlock_is_read_locked(fibril_rwlock_t *);
167extern bool fibril_rwlock_is_write_locked(fibril_rwlock_t *);
168extern bool fibril_rwlock_is_locked(fibril_rwlock_t *);
169
170extern void fibril_condvar_initialize(fibril_condvar_t *);
171extern errno_t fibril_condvar_wait_timeout(fibril_condvar_t *, fibril_mutex_t *,
172 usec_t);
173extern void fibril_condvar_wait(fibril_condvar_t *, fibril_mutex_t *);
174extern void fibril_condvar_signal(fibril_condvar_t *);
175extern void fibril_condvar_broadcast(fibril_condvar_t *);
176
177extern fibril_timer_t *fibril_timer_create(fibril_mutex_t *);
178extern void fibril_timer_destroy(fibril_timer_t *);
179extern void fibril_timer_set(fibril_timer_t *, usec_t, fibril_timer_fun_t,
180 void *);
181extern void fibril_timer_set_locked(fibril_timer_t *, usec_t,
182 fibril_timer_fun_t, void *);
183extern fibril_timer_state_t fibril_timer_clear(fibril_timer_t *);
184extern fibril_timer_state_t fibril_timer_clear_locked(fibril_timer_t *);
185
186extern void fibril_semaphore_initialize(fibril_semaphore_t *, long);
187extern void fibril_semaphore_up(fibril_semaphore_t *);
188extern void fibril_semaphore_down(fibril_semaphore_t *);
189extern errno_t fibril_semaphore_down_timeout(fibril_semaphore_t *, usec_t);
190extern void fibril_semaphore_close(fibril_semaphore_t *);
191
192typedef struct mpsc mpsc_t;
193extern mpsc_t *mpsc_create(size_t);
194extern void mpsc_destroy(mpsc_t *);
195extern errno_t mpsc_send(mpsc_t *, const void *);
196extern errno_t mpsc_receive(mpsc_t *, void *, const struct timespec *);
197extern void mpsc_close(mpsc_t *);
198
199__HELENOS_DECLS_END;
200
201#endif
202
203/** @}
204 */
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