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
|
// Copyright 2020-2024 Buf Technologies, Inc.
//
// 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.
package linker
import "google.golang.org/protobuf/types/descriptorpb"
// allocPool helps allocate descriptor instances. Instead of allocating
// them one at a time, we allocate a pool -- a large, flat slice to hold
// all descriptors of a particular kind for a file. We then use capacity
// in the pool when we need space for individual descriptors.
type allocPool struct {
numMessages int
numFields int
numOneofs int
numEnums int
numEnumValues int
numExtensions int
numServices int
numMethods int
messages []msgDescriptor
fields []fldDescriptor
oneofs []oneofDescriptor
enums []enumDescriptor
enumVals []enValDescriptor
extensions []extTypeDescriptor
services []svcDescriptor
methods []mtdDescriptor
}
func newAllocPool(file *descriptorpb.FileDescriptorProto) *allocPool {
var pool allocPool
pool.countElements(file)
pool.messages = make([]msgDescriptor, pool.numMessages)
pool.fields = make([]fldDescriptor, pool.numFields)
pool.oneofs = make([]oneofDescriptor, pool.numOneofs)
pool.enums = make([]enumDescriptor, pool.numEnums)
pool.enumVals = make([]enValDescriptor, pool.numEnumValues)
pool.extensions = make([]extTypeDescriptor, pool.numExtensions)
pool.services = make([]svcDescriptor, pool.numServices)
pool.methods = make([]mtdDescriptor, pool.numMethods)
return &pool
}
func (p *allocPool) getMessages(count int) []msgDescriptor {
allocated := p.messages[:count]
p.messages = p.messages[count:]
return allocated
}
func (p *allocPool) getFields(count int) []fldDescriptor {
allocated := p.fields[:count]
p.fields = p.fields[count:]
return allocated
}
func (p *allocPool) getOneofs(count int) []oneofDescriptor {
allocated := p.oneofs[:count]
p.oneofs = p.oneofs[count:]
return allocated
}
func (p *allocPool) getEnums(count int) []enumDescriptor {
allocated := p.enums[:count]
p.enums = p.enums[count:]
return allocated
}
func (p *allocPool) getEnumValues(count int) []enValDescriptor {
allocated := p.enumVals[:count]
p.enumVals = p.enumVals[count:]
return allocated
}
func (p *allocPool) getExtensions(count int) []extTypeDescriptor {
allocated := p.extensions[:count]
p.extensions = p.extensions[count:]
return allocated
}
func (p *allocPool) getServices(count int) []svcDescriptor {
allocated := p.services[:count]
p.services = p.services[count:]
return allocated
}
func (p *allocPool) getMethods(count int) []mtdDescriptor {
allocated := p.methods[:count]
p.methods = p.methods[count:]
return allocated
}
func (p *allocPool) countElements(file *descriptorpb.FileDescriptorProto) {
p.countElementsInMessages(file.MessageType)
p.countElementsInEnums(file.EnumType)
p.numExtensions += len(file.Extension)
p.numServices += len(file.Service)
for _, svc := range file.Service {
p.numMethods += len(svc.Method)
}
}
func (p *allocPool) countElementsInMessages(msgs []*descriptorpb.DescriptorProto) {
p.numMessages += len(msgs)
for _, msg := range msgs {
p.numFields += len(msg.Field)
p.numOneofs += len(msg.OneofDecl)
p.countElementsInMessages(msg.NestedType)
p.countElementsInEnums(msg.EnumType)
p.numExtensions += len(msg.Extension)
}
}
func (p *allocPool) countElementsInEnums(enums []*descriptorpb.EnumDescriptorProto) {
p.numEnums += len(enums)
for _, enum := range enums {
p.numEnumValues += len(enum.Value)
}
}
|
