blob: c18f30aa4a511383f09071a2bc135225bd2d6d63 (
plain) (
blame)
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
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2009-2011. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
* Author: Rickard Green
*/
//#define USE_PTHREAD_API
#define ETHR_EVENT_OFF_WAITER__ -1L
#define ETHR_EVENT_OFF__ 1L
#define ETHR_EVENT_ON__ 0L
#ifdef USE_PTHREAD_API
typedef struct {
ethr_atomic32_t state;
pthread_mutex_t mtx;
pthread_cond_t cnd;
} ethr_event;
#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_EVENT_IMPL__)
static void ETHR_INLINE
ETHR_INLINE_FUNC_NAME_(ethr_event_set)(ethr_event *e)
{
ethr_sint32_t val;
val = ethr_atomic32_xchg_mb(&e->state, ETHR_EVENT_ON__);
if (val == ETHR_EVENT_OFF_WAITER__) {
int res = pthread_mutex_lock(&e->mtx);
if (res != 0)
ETHR_FATAL_ERROR__(res);
res = pthread_cond_signal(&e->cnd);
if (res != 0)
ETHR_FATAL_ERROR__(res);
res = pthread_mutex_unlock(&e->mtx);
if (res != 0)
ETHR_FATAL_ERROR__(res);
}
}
static void ETHR_INLINE
ETHR_INLINE_FUNC_NAME_(ethr_event_reset)(ethr_event *e)
{
ethr_atomic32_set(&e->state, ETHR_EVENT_OFF__);
ETHR_MEMORY_BARRIER;
}
#endif
#else
typedef struct {
ethr_atomic32_t state;
PROCESS proc;
} ethr_event;
#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_EVENT_IMPL__)
static void ETHR_INLINE
ETHR_INLINE_FUNC_NAME_(ethr_event_set)(ethr_event *e)
{
ethr_sint32_t val = ethr_atomic32_xchg_mb(&e->state, ETHR_EVENT_ON__);
if (val == ETHR_EVENT_OFF_WAITER__) {
#ifdef DEBUG
OSFSEMVAL fsem_val = get_fsem(e->proc);
/* There is a race in this assert.
This is because the state is set before the wait call in wait__.
We hope that a delay of 10 ms is enough */
if (fsem_val == 0)
delay(10);
ETHR_ASSERT(get_fsem(e->proc) == -1);
#endif
signal_fsem(e->proc);
}
}
static void ETHR_INLINE
ETHR_INLINE_FUNC_NAME_(ethr_event_reset)(ethr_event *e)
{
ethr_atomic32_set(&e->state, ETHR_EVENT_OFF__);
ETHR_MEMORY_BARRIER;
}
#endif
#endif
int ethr_event_init(ethr_event *e);
int ethr_event_destroy(ethr_event *e);
int ethr_event_wait(ethr_event *e);
int ethr_event_swait(ethr_event *e, int spincount);
#if !defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_EVENT_IMPL__)
void ethr_event_set(ethr_event *e);
void ethr_event_reset(ethr_event *e);
#endif
|
