1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "config_write.h"
18 #include "logger.h"
19 
20 LIBLOG_HIDDEN struct listnode __android_log_transport_write =
21     { &__android_log_transport_write, &__android_log_transport_write };
22 LIBLOG_HIDDEN struct listnode __android_log_persist_write =
23     { &__android_log_persist_write, &__android_log_persist_write};
24 
__android_log_add_transport(struct listnode * list,struct android_log_transport_write * transport)25 static void __android_log_add_transport(
26         struct listnode *list, struct android_log_transport_write *transport) {
27     size_t i;
28 
29     /* Try to keep one functioning transport for each log buffer id */
30     for (i = LOG_ID_MIN; i < LOG_ID_MAX; i++) {
31         struct android_log_transport_write *transp;
32 
33         if (list_empty(list)) {
34             if (!transport->available || ((*transport->available)(i) >= 0)) {
35                 list_add_tail(list, &transport->node);
36                 return;
37             }
38         } else {
39             write_transport_for_each(transp, list) {
40                 if (!transp->available) {
41                     return;
42                 }
43                 if (((*transp->available)(i) < 0) &&
44                         (!transport->available ||
45                             ((*transport->available)(i) >= 0))) {
46                     list_add_tail(list, &transport->node);
47                     return;
48                 }
49             }
50         }
51     }
52 }
53 
__android_log_config_write()54 LIBLOG_HIDDEN void __android_log_config_write() {
55 #if (FAKE_LOG_DEVICE == 0)
56     extern struct android_log_transport_write logdLoggerWrite;
57     extern struct android_log_transport_write pmsgLoggerWrite;
58 
59     __android_log_add_transport(&__android_log_transport_write, &logdLoggerWrite);
60     __android_log_add_transport(&__android_log_persist_write, &pmsgLoggerWrite);
61 #else
62     extern struct android_log_transport_write fakeLoggerWrite;
63 
64     __android_log_add_transport(&__android_log_transport_write, &fakeLoggerWrite);
65 #endif
66 }
67