26 lines
785 B
Go
26 lines
785 B
Go
// Copyright 2009 The Go 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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// Malloc small size classes.
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//
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// See malloc.go for overview.
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// See also mksizeclasses.go for how we decide what size classes to use.
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package runtime
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// Returns size of the memory block that mallocgc will allocate if you ask for the size.
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func roundupsize(size uintptr) uintptr {
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if size < _MaxSmallSize {
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if size <= smallSizeMax-8 {
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return uintptr(class_to_size[size_to_class8[(size+smallSizeDiv-1)/smallSizeDiv]])
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} else {
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return uintptr(class_to_size[size_to_class128[(size-smallSizeMax+largeSizeDiv-1)/largeSizeDiv]])
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}
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}
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if size+_PageSize < size {
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return size
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}
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return alignUp(size, _PageSize)
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}
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