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
107
108
109
110
111
112
113
|
/*
* Copyright (c) 2009 NLNet Labs. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* Threading and locking.
*
*/
#ifndef SCHEDULER_LOCKS_H
#define SCHEDULER_LOCKS_H
#include "config.h"
#include "log.h"
#include <errno.h>
#include <stdlib.h>
#define LOCKRET(func) do { \
int err; \
if ( (err=(func)) != 0) \
ods_log_error("%s at %d could not " #func ": %s", \
__FILE__, __LINE__, strerror(err)); \
} while(0)
#if defined(HAVE_PTHREAD)
#include <pthread.h>
/** ods-signerd will crash if the thread stacksize is too small */
#define ODS_MINIMUM_STACKSIZE 524288
/** use pthread mutex for basic lock */
typedef pthread_mutex_t lock_basic_type;
/** use pthread cond for basic condition */
typedef pthread_cond_t cond_basic_type;
/** small front for pthread init func, NULL is default attrs. */
#define lock_basic_init(lock) LOCKRET(pthread_mutex_init(lock, NULL))
#define lock_basic_destroy(lock) LOCKRET(pthread_mutex_destroy(lock))
#define lock_basic_lock(lock) LOCKRET(pthread_mutex_lock(lock))
#define lock_basic_unlock(lock) LOCKRET(pthread_mutex_unlock(lock))
/** our own alarm clock */
#define lock_basic_set(cond) LOCKRET(pthread_cond_init(cond, NULL))
#define lock_basic_sleep(cond, lock, sleep) LOCKRET(ods_thread_wait(cond, lock, sleep))
#define lock_basic_alarm(cond) LOCKRET(pthread_cond_signal(cond))
#define lock_basic_broadcast(cond) LOCKRET(pthread_cond_broadcast(cond))
#define lock_basic_off(cond) LOCKRET(pthread_cond_destroy(cond))
/** thread creation */
typedef pthread_t ods_thread_type;
/** Pass where to store tread_t in thr. */
#define ods_thread_detach(thr) LOCKRET(pthread_detach(thr))
#define ods_thread_self() pthread_self()
#define ods_thread_join(thr) LOCKRET(pthread_join(thr, NULL))
#define ods_thread_kill(thr, sig) LOCKRET(pthread_kill(thr, sig))
int ods_thread_create(pthread_t *thr, void *(*func)(void *), void *arg);
int ods_thread_wait(cond_basic_type* cond, lock_basic_type* lock, time_t wait);
#else /* !HAVE_PTHREAD */
/* we do not have PTHREADS */
#define PTHREADS_DISABLED 1
typedef int lock_basic_type;
#define lock_basic_init(lock) /* nop */
#define lock_basic_destroy(lock) /* nop */
#define lock_basic_lock(lock) /* nop */
#define lock_basic_unlock(lock) /* nop */
#define lock_basic_set(cond) /* nop */
#define lock_basic_sleep(cond, lock, sleep) /* nop */
#define lock_basic_alarm(cond) /* nop */
#define lock_basic_broadcast(cond) /* nop */
#define lock_basic_off(cond) /* nop */
typedef pid_t ods_thread_type;
#define ods_thread_create(thr, func, arg) ods_thr_fork_create(thr, func, arg)
#define ods_thread_detach(thr) /* nop */
#define ods_thread_self() getpid()
#define ods_thread_join(thr) ods_thr_fork_wait(thr)
void ods_thr_fork_create(ods_thread_type* thr, void* (*func)(void*), void* arg);
void ods_thr_fork_wait(ods_thread_type thread);
#endif /* HAVE_PTHREAD */
void ods_thread_blocksigs(void);
#endif /* SHARED_LOCKS_H */
|
