1 /*
2 Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
3
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions are
6 met:
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9 * Redistributions in binary form must reproduce the above
10 copyright notice, this list of conditions and the following
11 disclaimer in the documentation and/or other materials provided
12 with the distribution.
13 * Neither the name of The Linux Foundation nor the names of its
14 contributors may be used to endorse or promote products derived
15 from this software without specific prior written permission.
16
17 THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 /*!
30 @file
31 IPACM_EvtDispatcher.cpp
32
33 @brief
34 This file implements the IPAM event dispatcher functionality
35
36 @Author
37
38 */
39 #include <string.h>
40 #include <pthread.h>
41 #include <IPACM_EvtDispatcher.h>
42 #include <IPACM_Neighbor.h>
43 #include "IPACM_CmdQueue.h"
44 #include "IPACM_Defs.h"
45
46
47 extern pthread_mutex_t mutex;
48 extern pthread_cond_t cond_var;
49
50 cmd_evts *IPACM_EvtDispatcher::head = NULL;
51 extern uint32_t ipacm_event_stats[IPACM_EVENT_MAX];
52
PostEvt(ipacm_cmd_q_data * data)53 int IPACM_EvtDispatcher::PostEvt
54 (
55 ipacm_cmd_q_data *data
56 )
57 {
58 Message *item = NULL;
59 MessageQueue *MsgQueue = NULL;
60
61 if(data->event < IPA_EXTERNAL_EVENT_MAX)
62 {
63 IPACMDBG("Insert event into external queue.\n");
64 MsgQueue = MessageQueue::getInstanceExternal();
65 }
66 else
67 {
68 IPACMDBG("Insert event into internal queue.\n");
69 MsgQueue = MessageQueue::getInstanceInternal();
70 }
71 if(MsgQueue == NULL)
72 {
73 IPACMERR("unable to retrieve MsgQueue instance\n");
74 return IPACM_FAILURE;
75 }
76
77 item = new Message();
78 if(item == NULL)
79 {
80 IPACMERR("unable to create new message item\n");
81 return IPACM_FAILURE;
82 }
83
84 item->evt.callback_ptr = IPACM_EvtDispatcher::ProcessEvt;
85 memcpy(&item->evt.data, data, sizeof(ipacm_cmd_q_data));
86
87 if(pthread_mutex_lock(&mutex) != 0)
88 {
89 IPACMERR("unable to lock the mutex\n");
90 return IPACM_FAILURE;
91 }
92
93 IPACMDBG("Enqueing item\n");
94 MsgQueue->enqueue(item);
95 IPACMDBG("Enqueued item %pK\n", item);
96
97 if(pthread_cond_signal(&cond_var) != 0)
98 {
99 IPACMDBG("unable to lock the mutex\n");
100 /* Release the mutex before you return failure */
101 if(pthread_mutex_unlock(&mutex) != 0)
102 {
103 IPACMERR("unable to unlock the mutex\n");
104 return IPACM_FAILURE;
105 }
106 return IPACM_FAILURE;
107 }
108
109 if(pthread_mutex_unlock(&mutex) != 0)
110 {
111 IPACMERR("unable to unlock the mutex\n");
112 return IPACM_FAILURE;
113 }
114
115 return IPACM_SUCCESS;
116 }
117
ProcessEvt(ipacm_cmd_q_data * data)118 void IPACM_EvtDispatcher::ProcessEvt(ipacm_cmd_q_data *data)
119 {
120
121 cmd_evts *tmp = head, tmp1;
122
123 if(head == NULL)
124 {
125 IPACMDBG("Queue is empty\n");
126 }
127
128 while(tmp != NULL)
129 {
130 memcpy(&tmp1, tmp, sizeof(tmp1));
131 if(data->event == tmp1.event)
132 {
133 ipacm_event_stats[data->event]++;
134 tmp1.obj->event_callback(data->event, data->evt_data);
135 IPACMDBG(" Find matched registered events\n");
136 }
137 tmp = tmp1.next;
138 }
139
140 IPACMDBG(" Finished process events\n");
141
142 if(data->evt_data != NULL)
143 {
144 IPACMDBG("free the event:%d data: %pK\n", data->event, data->evt_data);
145 free(data->evt_data);
146 }
147 return;
148 }
149
registr(ipa_cm_event_id event,IPACM_Listener * obj)150 int IPACM_EvtDispatcher::registr(ipa_cm_event_id event, IPACM_Listener *obj)
151 {
152 cmd_evts *tmp = head,*nw;
153
154 nw = (cmd_evts *)malloc(sizeof(cmd_evts));
155 if(nw != NULL)
156 {
157 nw->event = event;
158 nw->obj = obj;
159 nw->next = NULL;
160 }
161 else
162 {
163 return IPACM_FAILURE;
164 }
165
166 if(head == NULL)
167 {
168 head = nw;
169 }
170 else
171 {
172 while(tmp->next)
173 {
174 tmp = tmp->next;
175 }
176 tmp->next = nw;
177 }
178 return IPACM_SUCCESS;
179 }
180
181
deregistr(IPACM_Listener * param)182 int IPACM_EvtDispatcher::deregistr(IPACM_Listener *param)
183 {
184 cmd_evts *tmp = head,*tmp1,*prev = head;
185
186 while(tmp != NULL)
187 {
188 if(tmp->obj == param)
189 {
190 tmp1 = tmp;
191 if(tmp == head)
192 {
193 head = head->next;
194 }
195 else if(tmp->next == NULL)
196 {
197 prev->next = NULL;
198 }
199 else
200 {
201 prev->next = tmp->next;
202 }
203
204 tmp = tmp->next;
205 free(tmp1);
206 }
207 else
208 {
209 prev = tmp;
210 tmp = tmp->next;
211 }
212 }
213 return IPACM_SUCCESS;
214 }
215