runtime: delete cgo_allocate

This memory is untyped and can't be used anymore.
The next version of SWIG won't need it.

Change-Id: I592b287c5f5186975ee09a9b28d8efe3b57134e7
Reviewed-on: https://go-review.googlesource.com/8956
Reviewed-by: Ian Lance Taylor <iant@golang.org>

1 files changed, 0 insertions, 27 deletions

diff --git a/src/runtime/cgocallback.go b/src/runtime/cgocallback.go
index 20ce87d4ca..f93acaba03 100644
--- a/src/runtime/cgocallback.go
+++ b/src/runtime/cgocallback.go
@@ -4,35 +4,8 @@
 
 package runtime
 
-import "unsafe"
-
 // These functions are called from C code via cgo/callbacks.go.
 
-// Allocate memory.  This allocates the requested number of bytes in
-// memory controlled by the Go runtime.  The allocated memory will be
-// zeroed.  You are responsible for ensuring that the Go garbage
-// collector can see a pointer to the allocated memory for as long as
-// it is valid, e.g., by storing a pointer in a local variable in your
-// C function, or in memory allocated by the Go runtime.  If the only
-// pointers are in a C global variable or in memory allocated via
-// malloc, then the Go garbage collector may collect the memory.
-//
-// TODO(rsc,iant): This memory is untyped.
-// Either we need to add types or we need to stop using it.
-
-func _cgo_allocate_internal(len uintptr) unsafe.Pointer {
-	if len == 0 {
-		len = 1
-	}
-	ret := unsafe.Pointer(&make([]unsafe.Pointer, (len+ptrSize-1)/ptrSize)[0])
-	c := new(cgomal)
-	c.alloc = ret
-	gp := getg()
-	c.next = gp.m.cgomal
-	gp.m.cgomal = c
-	return ret
-}
-
 // Panic.
 
 func _cgo_panic_internal(p *byte) {