Make allocatePinned use local storage, and other refactorings

This is a batch of refactoring to remove some of the GC's global
state, as we move towards CPU-local GC.  

  - allocateLocal() now allocates large objects into the local
    nursery, rather than taking a global lock and allocating
    then in gen 0 step 0.

  - allocatePinned() was still allocating from global storage and
    taking a lock each time, now it uses local storage. 
    (mallocForeignPtrBytes should be faster with -threaded).
    
  - We had a gen 0 step 0, distinct from the nurseries, which are
    stored in a separate nurseries[] array.  This is slightly strange.
    I removed the g0s0 global that pointed to gen 0 step 0, and
    removed all uses of it.  I think now we don't use gen 0 step 0 at
    all, except possibly when there is only one generation.  Possibly
    more tidying up is needed here.

  - I removed the global allocate() function, and renamed
    allocateLocal() to allocate().

  - the alloc_blocks global is gone.  MAYBE_GC() and
    doYouWantToGC() now check the local nursery only.

1 files changed, 1 insertions, 1 deletions

diff --git a/rts/Weak.c b/rts/Weak.c
index f5c3a62bda..f5e918a921 100644
--- a/rts/Weak.c
+++ b/rts/Weak.c
@@ -120,7 +120,7 @@ scheduleFinalizers(Capability *cap, StgWeak *list)
 
     debugTrace(DEBUG_weak, "weak: batching %d finalizers", n);
 
-    arr = (StgMutArrPtrs *)allocateLocal(cap, sizeofW(StgMutArrPtrs) + n);
+    arr = (StgMutArrPtrs *)allocate(cap, sizeofW(StgMutArrPtrs) + n);
     TICK_ALLOC_PRIM(sizeofW(StgMutArrPtrs), n, 0);
     SET_HDR(arr, &stg_MUT_ARR_PTRS_FROZEN_info, CCS_SYSTEM);
     arr->ptrs = n;