Introduce an indirection layer for pointers

As the Go runtime can move stacks at any point and the C code runs
concurrently with the rest of the system, we cannot assume that the
payloads we give to the C code will stay valid for any particular
duration.

We must therefore give the C code handles which we can then look up in
our own list when the callbacks get called.

1 files changed, 4 insertions, 0 deletions

diff --git a/git.go b/git.go
index 9496d2d..4f1a65e 100644
--- a/git.go
+++ b/git.go
@@ -93,7 +93,11 @@ var (
 	ErrInvalid = errors.New("Invalid state for operation")
 )
 
+var pointerHandles *HandleList
+
 func init() {
+	pointerHandles = NewHandleList()
+
 	C.git_libgit2_init()
 
 	// This is not something we should be doing, as we may be