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, 2 insertions, 2 deletions

diff --git a/rts/RaiseAsync.c b/rts/RaiseAsync.c
index a0f78eeff7..fad28035e6 100644
--- a/rts/RaiseAsync.c
+++ b/rts/RaiseAsync.c
@@ -792,7 +792,7 @@ raiseAsync(Capability *cap, StgTSO *tso, StgClosure *exception,
 	    // fun field.
 	    //
 	    words = frame - sp - 1;
-	    ap = (StgAP_STACK *)allocateLocal(cap,AP_STACK_sizeW(words));
+	    ap = (StgAP_STACK *)allocate(cap,AP_STACK_sizeW(words));
 	    
 	    ap->size = words;
 	    ap->fun  = (StgClosure *)sp[0];
@@ -856,7 +856,7 @@ raiseAsync(Capability *cap, StgTSO *tso, StgClosure *exception,
 	    // we've got an exception to raise, so let's pass it to the
 	    // handler in this frame.
 	    //
-	    raise = (StgThunk *)allocateLocal(cap,sizeofW(StgThunk)+1);
+	    raise = (StgThunk *)allocate(cap,sizeofW(StgThunk)+1);
 	    TICK_ALLOC_SE_THK(1,0);
 	    SET_HDR(raise,&stg_raise_info,cf->header.prof.ccs);
 	    raise->payload[0] = exception;