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| author | Austin Clements <austin@google.com> | 2016-04-28 11:19:53 -0400 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2016-04-29 03:53:12 +0000 |
| commit | 2e8b74b69574e969b5565e69cb54d39064b2dba1 (patch) | |
| tree | a332fdd527e6a29cf4a952c532e147259f271c9a /src/runtime | |
| parent | 15744c92de5e6a2295bfbae2126b19c124bbb46a (diff) | |
| download | go-2e8b74b69574e969b5565e69cb54d39064b2dba1.tar.xz | |
[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 <rlh@golang.org>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/malloc.go | 4 |
1 files changed, 4 insertions, 0 deletions
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. |