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35 lines
964 B
Go
35 lines
964 B
Go
// Copyright 2021 The Libc Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build windows || darwin || (linux && arm) || (linux && s390x) || (linux && 386) || (linux && arm) || (linux && arm64) || (freebsd && amd64)
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// +build windows darwin linux,arm linux,s390x linux,386 linux,arm linux,arm64 freebsd,amd64
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package libc // import "modernc.org/libc"
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import (
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"sync/atomic"
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"unsafe"
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)
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var errno0 int32 // Temp errno for NewTLS
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type TLS struct {
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ID int32
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errnop uintptr
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reentryGuard int32 // memgrind
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stack stackHeader
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stackHeaderBalance int32
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}
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func NewTLS() *TLS {
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id := atomic.AddInt32(&tid, 1)
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t := &TLS{ID: id, errnop: uintptr(unsafe.Pointer(&errno0))}
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if memgrind {
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atomic.AddInt32(&tlsBalance, 1)
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}
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t.errnop = t.Alloc(int(unsafe.Sizeof(int32(0))))
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*(*int32)(unsafe.Pointer(t.errnop)) = 0
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return t
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}
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