runtime: reorganize memory code
Move code from malloc1.go, malloc2.go, mem.go, mgc0.go into
appropriate locations.
Factor mgc.go into mgc.go, mgcmark.go, mgcsweep.go, mstats.go.
A lot of this code was in certain files because the right place was in
a C file but it was written in Go, or vice versa. This is one step toward
making things actually well-organized again.
Change-Id: I6741deb88a7cfb1c17ffe0bcca3989e10207968f
Reviewed-on: https://go-review.googlesource.com/5300
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Rick Hudson <rlh@golang.org>
diff --git a/src/runtime/mcentral.go b/src/runtime/mcentral.go
index 45e7553..965cd10 100644
--- a/src/runtime/mcentral.go
+++ b/src/runtime/mcentral.go
@@ -12,6 +12,14 @@
package runtime
+// Central list of free objects of a given size.
+type mcentral struct {
+ lock mutex
+ sizeclass int32
+ nonempty mspan // list of spans with a free object
+ empty mspan // list of spans with no free objects (or cached in an mcache)
+}
+
// Initialize a single central free list.
func mCentral_Init(c *mcentral, sizeclass int32) {
c.sizeclass = sizeclass
