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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/**************************************************************************
*
* Copyright 2020 Lag Free Games, LLC
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef CND_MONOTONIC_H
#define CND_MONOTONIC_H
#include "c11/threads.h"
#include "util/os_time.h"
#ifdef __cplusplus
extern "C" {
#endif
struct u_cnd_monotonic
{
#ifdef _WIN32
CONDITION_VARIABLE condvar;
#else
pthread_cond_t cond;
#endif
};
static inline int
u_cnd_monotonic_init(struct u_cnd_monotonic *cond)
{
assert(cond != NULL);
#ifdef _WIN32
InitializeConditionVariable(&cond->condvar);
return thrd_success;
#else
int ret = thrd_error;
pthread_condattr_t condattr;
if (pthread_condattr_init(&condattr) == 0) {
if ((pthread_condattr_setclock(&condattr, CLOCK_MONOTONIC) == 0) &&
(pthread_cond_init(&cond->cond, &condattr) == 0)) {
ret = thrd_success;
}
pthread_condattr_destroy(&condattr);
}
return ret;
#endif
}
static inline void
u_cnd_monotonic_destroy(struct u_cnd_monotonic *cond)
{
assert(cond != NULL);
#ifdef _WIN32
// Do nothing
#else
pthread_cond_destroy(&cond->cond);
#endif
}
static inline int
u_cnd_monotonic_broadcast(struct u_cnd_monotonic *cond)
{
assert(cond != NULL);
#ifdef _WIN32
WakeAllConditionVariable(&cond->condvar);
return thrd_success;
#else
return (pthread_cond_broadcast(&cond->cond) == 0) ? thrd_success : thrd_error;
#endif
}
static inline int
u_cnd_monotonic_signal(struct u_cnd_monotonic *cond)
{
assert(cond != NULL);
#ifdef _WIN32
WakeConditionVariable(&cond->condvar);
return thrd_success;
#else
return (pthread_cond_signal(&cond->cond) == 0) ? thrd_success : thrd_error;
#endif
}
static inline int
u_cnd_monotonic_timedwait(struct u_cnd_monotonic *cond, mtx_t *mtx, const struct timespec *abs_time)
{
assert(cond != NULL);
assert(mtx != NULL);
assert(abs_time != NULL);
#ifdef _WIN32
const uint64_t future = (abs_time->tv_sec * 1000) + (abs_time->tv_nsec / 1000000);
const uint64_t now = os_time_get_nano() / 1000000;
const DWORD timeout = (future > now) ? (DWORD)(future - now) : 0;
if (SleepConditionVariableCS(&cond->condvar, mtx, timeout))
return thrd_success;
return (GetLastError() == ERROR_TIMEOUT) ? thrd_busy : thrd_error;
#else
int rt = pthread_cond_timedwait(&cond->cond, mtx, abs_time);
if (rt == ETIMEDOUT)
return thrd_busy;
return (rt == 0) ? thrd_success : thrd_error;
#endif
}
static inline int
u_cnd_monotonic_wait(struct u_cnd_monotonic *cond, mtx_t *mtx)
{
assert(cond != NULL);
assert(mtx != NULL);
#ifdef _WIN32
SleepConditionVariableCS(&cond->condvar, mtx, INFINITE);
return thrd_success;
#else
return (pthread_cond_wait(&cond->cond, mtx) == 0) ? thrd_success : thrd_error;
#endif
}
#ifdef __cplusplus
}
#endif
#endif
|
