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 <log/log_transport.h>
18
19 #include "config_read.h"
20 #include "logger.h"
21
22 LIBLOG_HIDDEN struct listnode __android_log_transport_read = {
23 &__android_log_transport_read, &__android_log_transport_read
24 };
25 LIBLOG_HIDDEN struct listnode __android_log_persist_read = {
26 &__android_log_persist_read, &__android_log_persist_read
27 };
28
__android_log_add_transport(struct listnode * list,struct android_log_transport_read * transport)29 static void __android_log_add_transport(
30 struct listnode* list, struct android_log_transport_read* transport) {
31 size_t i;
32
33 /* Try to keep one functioning transport for each log buffer id */
34 for (i = LOG_ID_MIN; i < LOG_ID_MAX; i++) {
35 struct android_log_transport_read* transp;
36
37 if (list_empty(list)) {
38 if (!transport->available || ((*transport->available)(i) >= 0)) {
39 list_add_tail(list, &transport->node);
40 return;
41 }
42 } else {
43 read_transport_for_each(transp, list) {
44 if (!transp->available) {
45 return;
46 }
47 if (((*transp->available)(i) < 0) &&
48 (!transport->available || ((*transport->available)(i) >= 0))) {
49 list_add_tail(list, &transport->node);
50 return;
51 }
52 }
53 }
54 }
55 }
56
__android_log_config_read()57 LIBLOG_HIDDEN void __android_log_config_read() {
58 if (__android_log_transport & LOGGER_LOCAL) {
59 extern struct android_log_transport_read localLoggerRead;
60
61 __android_log_add_transport(&__android_log_transport_read, &localLoggerRead);
62 }
63
64 #if (FAKE_LOG_DEVICE == 0)
65 if ((__android_log_transport == LOGGER_DEFAULT) ||
66 (__android_log_transport & LOGGER_LOGD)) {
67 extern struct android_log_transport_read logdLoggerRead;
68 extern struct android_log_transport_read pmsgLoggerRead;
69
70 __android_log_add_transport(&__android_log_transport_read, &logdLoggerRead);
71 __android_log_add_transport(&__android_log_persist_read, &pmsgLoggerRead);
72 }
73 #endif
74 }
75
__android_log_config_read_close()76 LIBLOG_HIDDEN void __android_log_config_read_close() {
77 struct android_log_transport_read* transport;
78 struct listnode* n;
79
80 read_transport_for_each_safe(transport, n, &__android_log_transport_read) {
81 list_remove(&transport->node);
82 }
83 read_transport_for_each_safe(transport, n, &__android_log_persist_read) {
84 list_remove(&transport->node);
85 }
86 }
87