github.com/tachunwu/scale@v0.0.0-20230215135019-20d7de63a560/pkg/database/rawalloc/rawalloc_go1.9.go (about)

     1  //go:build gc && go1.9
     2  // +build gc,go1.9
     3  
     4  package rawalloc
     5  
     6  // Copyright 2018 The Cockroach Authors.
     7  //
     8  // Licensed under the Apache License, Version 2.0 (the "License");
     9  // you may not use this file except in compliance with the License.
    10  // You may obtain a copy of the License at
    11  //
    12  //     http://www.apache.org/licenses/LICENSE-2.0
    13  //
    14  // Unless required by applicable law or agreed to in writing, software
    15  // distributed under the License is distributed on an "AS IS" BASIS,
    16  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
    17  // implied. See the License for the specific language governing
    18  // permissions and limitations under the License.
    19  
    20  import "unsafe"
    21  
    22  // The go:linkname directives provides backdoor access to private functions in
    23  // the runtime. Below we're accessing the mallocgc function. Note that this
    24  // access is necessarily tied to a specific Go release which is why this file
    25  // is protected by a build tag.
    26  
    27  //go:linkname mallocgc runtime.mallocgc
    28  func mallocgc(size uintptr, typ unsafe.Pointer, needzero bool) unsafe.Pointer