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>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/runtime/mfinal.go b/src/runtime/mfinal.go
index 525aa0955a..d066b609b7 100644
--- a/src/runtime/mfinal.go
+++ b/src/runtime/mfinal.go
@@ -8,6 +8,14 @@ package runtime
 
 import "unsafe"
 
+type finblock struct {
+	alllink *finblock
+	next    *finblock
+	cnt     int32
+	_       int32
+	fin     [(_FinBlockSize - 2*ptrSize - 2*4) / unsafe.Sizeof(finalizer{})]finalizer
+}
+
 var finlock mutex  // protects the following variables
 var fing *g        // goroutine that runs finalizers
 var finq *finblock // list of finalizers that are to be executed
@@ -17,6 +25,15 @@ var fingwait bool
 var fingwake bool
 var allfin *finblock // list of all blocks
 
+// NOTE: Layout known to queuefinalizer.
+type finalizer struct {
+	fn   *funcval       // function to call
+	arg  unsafe.Pointer // ptr to object
+	nret uintptr        // bytes of return values from fn
+	fint *_type         // type of first argument of fn
+	ot   *ptrtype       // type of ptr to object
+}
+
 var finalizer1 = [...]byte{
 	// Each Finalizer is 5 words, ptr ptr uintptr ptr ptr.
 	// Each byte describes 4 words.