mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-14 18:44:16 +00:00
77 lines
2.6 KiB
Go
77 lines
2.6 KiB
Go
// Copyright (c) 2014 Couchbase, 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 search
|
|
|
|
// DocumentMatchPoolTooSmall is a callback function that can be executed
|
|
// when the DocumentMatchPool does not have sufficient capacity
|
|
// By default we just perform just-in-time allocation, but you could log
|
|
// a message, or panic, etc.
|
|
type DocumentMatchPoolTooSmall func(p *DocumentMatchPool) *DocumentMatch
|
|
|
|
// DocumentMatchPool manages use/re-use of DocumentMatch instances
|
|
// it pre-allocates space from a single large block with the expected
|
|
// number of instances. It is not thread-safe as currently all
|
|
// aspects of search take place in a single goroutine.
|
|
type DocumentMatchPool struct {
|
|
avail DocumentMatchCollection
|
|
TooSmall DocumentMatchPoolTooSmall
|
|
}
|
|
|
|
func defaultDocumentMatchPoolTooSmall(p *DocumentMatchPool) *DocumentMatch {
|
|
return &DocumentMatch{}
|
|
}
|
|
|
|
// NewDocumentMatchPool will build a DocumentMatchPool with memory
|
|
// pre-allocated to accommodate the requested number of DocumentMatch
|
|
// instances
|
|
func NewDocumentMatchPool(size, sortsize int) *DocumentMatchPool {
|
|
avail := make(DocumentMatchCollection, 0, size)
|
|
// pre-allocate the expected number of instances
|
|
startBlock := make([]DocumentMatch, size)
|
|
// make these initial instances available
|
|
for i := range startBlock {
|
|
startBlock[i].Sort = make([]string, 0, sortsize)
|
|
avail = append(avail, &startBlock[i])
|
|
}
|
|
return &DocumentMatchPool{
|
|
avail: avail,
|
|
TooSmall: defaultDocumentMatchPoolTooSmall,
|
|
}
|
|
}
|
|
|
|
// Get returns an available DocumentMatch from the pool
|
|
// if the pool was not allocated with sufficient size, an allocation will
|
|
// occur to satisfy this request. As a side-effect this will grow the size
|
|
// of the pool.
|
|
func (p *DocumentMatchPool) Get() *DocumentMatch {
|
|
var rv *DocumentMatch
|
|
if len(p.avail) > 0 {
|
|
rv, p.avail = p.avail[len(p.avail)-1], p.avail[:len(p.avail)-1]
|
|
} else {
|
|
rv = p.TooSmall(p)
|
|
}
|
|
return rv
|
|
}
|
|
|
|
// Put returns a DocumentMatch to the pool
|
|
func (p *DocumentMatchPool) Put(d *DocumentMatch) {
|
|
if d == nil {
|
|
return
|
|
}
|
|
// reset DocumentMatch before returning it to available pool
|
|
d.Reset()
|
|
p.avail = append(p.avail, d)
|
|
}
|