blob: 27c949bd1abf807a19d64b7043a868e6e21743ae (
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
|
/*******************************************************************************
* Copyright (c) 2011 protos software gmbh (http://www.protos.de).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* CONTRIBUTORS:
* Thomas Schuetz (initial contribution)
*
*******************************************************************************/
#include "etMessageQueue.h"
#include "etMSCLogger.h"
void etMessageQueue_init(etMessageQueue* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "init")
self->first = NULL;
self->last = NULL;
self->highWaterMark = 0;
self->size = 0;
ET_MSC_LOGGER_SYNC_EXIT
}
void etMessageQueue_push(etMessageQueue* self, etMessage* msg){
// TODO: optimize queue for concurrent push / pop
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "push")
if (self->first == NULL) {
/*no message in queue*/
self->first = self->last = msg;
}
else {
/*at least one message in queue*/
self->last->next = msg;
self->last = msg;
}
msg->next = NULL; /*TODO: optimization: this line could be removed if we assume that all messages are initialized*/
if (++self->size > self->highWaterMark)
self->highWaterMark++;
ET_MSC_LOGGER_SYNC_EXIT
}
etMessage* etMessageQueue_pop(etMessageQueue* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "pop")
etMessage* pop_msg = self->first;
if(self->first == NULL){
/*no message in queue*/
ET_MSC_LOGGER_SYNC_EXIT
return NULL;
}
if (self->first->next==NULL){
/*only one message in queue*/
self->first = self->last = NULL;
}
else {
/*more than one message in queue -> set first to nex message*/
self->first = self->first->next;
}
pop_msg->next=NULL;
self->size--;
ET_MSC_LOGGER_SYNC_EXIT
return pop_msg;
}
etInt16 etMessageQueue_getSize(etMessageQueue* self) {
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "init")
ET_MSC_LOGGER_SYNC_EXIT
return self->size;
}
etMessage* etMessageQueue_getFirst(etMessageQueue* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "init")
ET_MSC_LOGGER_SYNC_EXIT
return self->first;
}
etMessage* etMessageQueue_getLast(etMessageQueue* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "init")
ET_MSC_LOGGER_SYNC_EXIT
return self->last;
}
etBool etMessageQueue_isNotEmpty(etMessageQueue* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "init")
ET_MSC_LOGGER_SYNC_EXIT
return self->last != NULL;
}
etInt16 etMessageQueue_getHightWaterMark(etMessageQueue* self) {
ET_MSC_LOGGER_SYNC_ENTRY("etMessageQueue", "init")
ET_MSC_LOGGER_SYNC_EXIT
return self->highWaterMark;
}
|
