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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <stdatomic.h>
#include <stdbool.h>
#include <cutils/list.h>
#include <log/log.h>
#include "log_portability.h"
#include "uio.h"
__BEGIN_DECLS
/* Union, sock or fd of zero is not allowed unless static initialized */
union android_log_context_union {
void* priv;
atomic_int sock;
atomic_int fd;
struct listnode* node;
atomic_uintptr_t atomic_pointer;
};
struct android_log_transport_write {
struct listnode node;
const char* name; /* human name to describe the transport */
unsigned logMask; /* mask cache of available() success */
union android_log_context_union context; /* Initialized by static allocation */
int (*available)(log_id_t logId); /* Does not cause resources to be taken */
int (*open)(); /* can be called multiple times, reusing current resources */
void (*close)(); /* free up resources */
/* write log to transport, returns number of bytes propagated, or -errno */
int (*write)(log_id_t logId, struct timespec* ts, struct iovec* vec,
size_t nr);
};
struct android_log_logger_list;
struct android_log_transport_context;
struct android_log_logger;
struct android_log_transport_read {
struct listnode node;
const char* name; /* human name to describe the transport */
/* Does not cause resources to be taken */
int (*available)(log_id_t logId);
int (*version)(struct android_log_logger* logger,
struct android_log_transport_context* transp);
/* Release resources taken by the following interfaces */
void (*close)(struct android_log_logger_list* logger_list,
struct android_log_transport_context* transp);
/*
* Expect all to instantiate open automagically on any call,
* so we do not have an explicit open call.
*/
int (*read)(struct android_log_logger_list* logger_list,
struct android_log_transport_context* transp,
struct log_msg* log_msg);
/* Must only be called if not ANDROID_LOG_NONBLOCK (blocking) */
int (*poll)(struct android_log_logger_list* logger_list,
struct android_log_transport_context* transp);
int (*clear)(struct android_log_logger* logger,
struct android_log_transport_context* transp);
ssize_t (*setSize)(struct android_log_logger* logger,
struct android_log_transport_context* transp, size_t size);
ssize_t (*getSize)(struct android_log_logger* logger,
struct android_log_transport_context* transp);
ssize_t (*getReadableSize)(struct android_log_logger* logger,
struct android_log_transport_context* transp);
ssize_t (*getPrune)(struct android_log_logger_list* logger_list,
struct android_log_transport_context* transp, char* buf,
size_t len);
ssize_t (*setPrune)(struct android_log_logger_list* logger_list,
struct android_log_transport_context* transp, char* buf,
size_t len);
ssize_t (*getStats)(struct android_log_logger_list* logger_list,
struct android_log_transport_context* transp, char* buf,
size_t len);
};
struct android_log_logger_list {
struct listnode logger;
struct listnode transport;
int mode;
unsigned int tail;
log_time start;
pid_t pid;
};
struct android_log_logger {
struct listnode node;
struct android_log_logger_list* parent;
log_id_t logId;
};
struct android_log_transport_context {
struct listnode node;
union android_log_context_union context; /* zero init per-transport context */
struct android_log_logger_list* parent;
struct android_log_transport_read* transport;
unsigned logMask; /* mask of requested log buffers */
int ret; /* return value associated with following data */
struct log_msg logMsg; /* peek at upcoming data, valid if logMsg.len != 0 */
};
/* assumes caller has structures read-locked, single threaded, or fenced */
#define transport_context_for_each(transp, logger_list) \
for ((transp) = node_to_item((logger_list)->transport.next, \
struct android_log_transport_context, node); \
((transp) != node_to_item(&(logger_list)->transport, \
struct android_log_transport_context, node)) && \
((transp)->parent == (logger_list)); \
(transp) = node_to_item((transp)->node.next, \
struct android_log_transport_context, node))
#define logger_for_each(logp, logger_list) \
for ((logp) = node_to_item((logger_list)->logger.next, \
struct android_log_logger, node); \
((logp) != node_to_item(&(logger_list)->logger, \
struct android_log_logger, node)) && \
((logp)->parent == (logger_list)); \
(logp) = \
node_to_item((logp)->node.next, struct android_log_logger, node))
/* OS specific dribs and drabs */
#if defined(_WIN32)
#include <private/android_filesystem_config.h>
typedef uint32_t uid_t;
static inline uid_t __android_log_uid() {
return AID_SYSTEM;
}
#else
static inline uid_t __android_log_uid() {
return getuid();
}
#endif
void __android_log_lock();
int __android_log_trylock();
void __android_log_unlock();
extern int __android_log_transport;
__END_DECLS
|
