| // Copyright 2023 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 { |
| bl := bloc |
| n = memRound(n) |
| if bl+n > blocMax { |
| grow := (bl + n - blocMax) / physPageSize |
| size := growMemory(int32(grow)) |
| if size < 0 { |
| return nil |
| } |
| resetMemoryDataView() |
| blocMax = bl + n |
| } |
| bloc += n |
| return unsafe.Pointer(bl) |
| } |
| |
| // Implemented in src/runtime/sys_wasm.s |
| func growMemory(pages int32) int32 |
| func currentMemory() int32 |
