github.com/petermattis/pebble@v0.0.0-20190905164901-ab51a2166067/internal/rawalloc/rawalloc.go (about)

     1  // Copyright 2018 The Cockroach Authors.
     2  //
     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
    12  // implied. See the License for the specific language governing
    13  // permissions and limitations under the License.
    14  
    15  package rawalloc
    16  
    17  // New returns a new byte slice of the specified length and capacity where the
    18  // backing memory is uninitialized. This differs from make([]byte) which
    19  // guarantees that the backing memory for the slice is initialized to zero. Use
    20  // carefully.
    21  func New(len, cap int) []byte {
    22  	ptr := mallocgc(uintptr(cap), nil, false)
    23  	return (*[maxArrayLen]byte)(ptr)[:len:cap]
    24  }