From 2e8b74b69574e969b5565e69cb54d39064b2dba1 Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Thu, 28 Apr 2016 11:19:53 -0400 Subject: [PATCH] [dev.garbage] runtime: document sysAlloc In particular, it always returns an aligned pointer. Change-Id: I763789a539a4bfd8b0efb36a39a80be1a479d3e2 Reviewed-on: https://go-review.googlesource.com/22558 Reviewed-by: Rick Hudson Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot --- src/runtime/malloc.go | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index ec4939f1dd..2d8905b88d 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -387,6 +387,10 @@ func sysReserveHigh(n uintptr, reserved *bool) unsafe.Pointer { return sysReserve(nil, n, reserved) } +// sysAlloc allocates the next n bytes from the heap arena. The +// returned pointer is always _PageSize aligned and between +// h.arena_start and h.arena_end. sysAlloc returns nil on failure. +// There is no corresponding free function. func (h *mheap) sysAlloc(n uintptr) unsafe.Pointer { if n > h.arena_end-h.arena_used { // We are in 32-bit mode, maybe we didn't use all possible address space yet. -- 2.48.1