1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "sub_event_parser.h"
16 #include "logging.h"
17
18 FTRACE_NS_BEGIN
GetInstance()19 SubEventParser& SubEventParser::GetInstance()
20 {
21 static SubEventParser instance;
22 return instance;
23 }
24
SubEventParser()25 SubEventParser::SubEventParser()
26 {
27 HILOG_INFO(LOG_CORE, "SubEventParser create!");
28 }
29
~SubEventParser()30 SubEventParser::~SubEventParser()
31 {
32 HILOG_INFO(LOG_CORE, "SubEventParser destroy!");
33 }
34
IsSupport(uint32_t eventId) const35 bool SubEventParser::IsSupport(uint32_t eventId) const
36 {
37 return idToFunctions_.count(eventId);
38 }
39
IsSupport(const std::string & eventName) const40 bool SubEventParser::IsSupport(const std::string& eventName) const
41 {
42 return nameToFunctions_.count(eventName) > 0;
43 }
44
ParseEvent(FtraceEvent & event,uint8_t data[],size_t size,const EventFormat & format) const45 bool SubEventParser::ParseEvent(FtraceEvent& event, uint8_t data[], size_t size, const EventFormat& format) const
46 {
47 auto iter = idToFunctions_.find(format.eventId);
48 if (iter != idToFunctions_.end()) {
49 iter->second(event, data, size, format);
50 return true;
51 }
52 return false;
53 }
54
SetupEvent(const EventFormat & format)55 bool SubEventParser::SetupEvent(const EventFormat& format)
56 {
57 auto it = nameToFunctions_.find(format.eventName);
58 if (it != nameToFunctions_.end()) {
59 idToFunctions_[format.eventId] = it->second;
60 return true;
61 }
62 return false;
63 }
64
RegisterParseFunction(const std::string & name,ParseFunction && fun)65 void SubEventParser::RegisterParseFunction(const std::string& name, ParseFunction&& fun)
66 {
67 CHECK_TRUE(nameToFunctions_.count(name) == 0, NO_RETVAL, "parse function for %s already registered!", name.c_str());
68 nameToFunctions_[name] = fun;
69 }
70
UnregisterParseFunction(const std::string & name)71 void SubEventParser::UnregisterParseFunction(const std::string& name)
72 {
73 CHECK_TRUE(nameToFunctions_.count(name) > 0, NO_RETVAL, "parse function for %s not registered!", name.c_str());
74 nameToFunctions_.erase(name);
75 }
76
SubEventParserRegisterar(const std::string & name,SubEventParser::ParseFunction && func)77 SubEventParserRegisterar::SubEventParserRegisterar(const std::string& name, SubEventParser::ParseFunction&& func)
78 : name_(name)
79 {
80 SubEventParser::GetInstance().RegisterParseFunction(name, std::move(func));
81 }
82
~SubEventParserRegisterar()83 SubEventParserRegisterar::~SubEventParserRegisterar()
84 {
85 SubEventParser::GetInstance().UnregisterParseFunction(name_);
86 }
87 FTRACE_NS_END
88