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// Copyright 2010 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 runtime
import "unsafe"
func sbrk(n uintptr) unsafe.Pointer {
// Plan 9 sbrk from /sys/src/libc/9sys/sbrk.c
bl := bloc
n = memRound(n)
if bl+n > blocMax {
if brk_(unsafe.Pointer(bl+n)) < 0 {
return nil
}
blocMax = bl + n
}
bloc += n
return unsafe.Pointer(bl)
}
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