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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package calloc
// This package contains a simple "batch" allocator for allocating
// coverage counters (slices of uint32 basically), for working with
// coverage data files. Collections of counter arrays tend to all be
// live/dead over the same time period, so a good fit for batch
// allocation.
type BatchCounterAlloc struct {
pool []uint32
}
func (ca *BatchCounterAlloc) AllocateCounters(n int) []uint32 {
const chunk = 8192
if n > cap(ca.pool) {
siz := chunk
if n > chunk {
siz = n
}
ca.pool = make([]uint32, siz)
}
rv := ca.pool[:n]
ca.pool = ca.pool[n:]
return rv
}
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