Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 117 insertions, 0 deletions

diff --git a/rts/parallel/Dist.c b/rts/parallel/Dist.c
new file mode 100644
index 0000000000..eeec780716
--- /dev/null
+++ b/rts/parallel/Dist.c
@@ -0,0 +1,117 @@
+#include "Dist.h"
+
+#ifdef DIST /* whole file */
+
+#include "RtsFlags.h"
+#include "RtsUtils.h"
+#include "ParallelRts.h"
+#include "Parallel.h" // nPEs,allPEs,mytid 
+#include "HLC.h" //for sendReval
+#include "LLC.h" //for pvm stuff
+#include "FetchMe.h"     // for BLOCKED_FETCH_info 
+#include "Storage.h"       // for recordMutable
+
+/* hopefully the result>0  */
+StgWord32 cGetPECount(void)
+{ return nPEs;
+} 
+
+/* return taskID, n is 1..count, n=1 is always the mainPE */
+StgPEId cGetPEId(StgWord32 n)
+{ return allPEs[n-1];
+}
+
+/* return the taskID */
+StgPEId cGetMyPEId(void)
+{ return mytid;
+}
+
+/* return the taskID of the owning PE of an MVar/TSO:
+- MVAR/TSOs get converted to REMOTE_REFs when shipped, and
+  there is no mechanism for using these REMOTE_REFs 
+  apart from this code.
+*/   
+
+StgPEId cGetCertainOwner(StgClosure *mv)
+{ globalAddr *ga; 
+  switch(get_itbl(mv)->type)
+  { case TSO:
+    case MVAR:
+      return  mytid; // must be local 
+    case REMOTE_REF:
+      ga = LAGAlookup(mv);
+      ASSERT(ga);
+      return ga->payload.gc.gtid; // I know its global address
+  }   
+  barf("Dist.c:cGetCertainOwner() wrong closure type %s",info_type(mv));
+}
+
+/* for some additional fun, lets look up a certain host... */
+StgPEId cGetHostOwner(StgByteArray h) //okay h is a C string 
+{ int nArch,nHost,nTask,i;
+  StgPEId dtid;
+  struct pvmhostinfo *host;   
+  struct pvmtaskinfo *task;
+  
+  dtid=0;
+  pvm_config(&nHost,&nArch,&host); 
+  for(i=0;i<nHost;i++)
+    if(strcmp(host[i].hi_name,h)==0) 
+    { dtid=host[i].hi_tid;
+      break;
+    } 
+  if(dtid==0) return 0; // no host of that name
+  
+  for(i=0;i<nPEs;i++)
+  { pvm_tasks(allPEs[i],&nTask,&task);
+    ASSERT(nTask==1); //cause we lookup a single task
+    if(task[0].ti_host==dtid)
+      return allPEs[i];
+  }  
+  return 0;  //know host, put no PE on it
+}
+
+void cRevalIO(StgClosure *job,StgPEId p)
+{ nat size;
+  rtsPackBuffer *buffer=NULL;
+      
+  ASSERT(get_itbl(job)->type==MVAR);  
+  job=((StgMVar*)job)->value; // extract the job from the MVar
+
+  ASSERT(closure_THUNK(job)); // must be a closure!!!!!
+  ASSERT(p!=mytid);
+  
+  buffer = PackNearbyGraph(job, END_TSO_QUEUE, &size,p);
+  ASSERT(buffer != (rtsPackBuffer *)NULL);
+  ASSERT(get_itbl(job)->type==RBH);  
+  
+  IF_PAR_DEBUG(verbose,
+               belch("@;~) %x doing revalIO to %x\n",
+		     mytid,p)); 
+
+  sendReval(p,size,buffer);  
+  
+  if (RtsFlags.ParFlags.ParStats.Global &&
+      RtsFlags.GcFlags.giveStats > NO_GC_STATS) {
+    globalParStats.tot_reval_mess++;
+  }
+  
+  /* 
+     We turn job into a FETCHME_BQ so that the thread will block
+     when it enters it.
+     
+     Note: it will not receive an ACK, thus no GA.   
+  */
+  
+  ASSERT(get_itbl(job)->type==RBH);  
+ 
+   /* put closure on mutables list, while it is still a RBH */
+  recordMutable((StgMutClosure *)job);
+
+  /* actually turn it into a FETCH_ME_BQ */
+  SET_INFO(job, &FETCH_ME_BQ_info);
+  ((StgFetchMe *)job)->ga = 0;     //hope this won't make anyone barf!!!
+  ((StgBlockingQueue*)job)->blocking_queue=END_BQ_QUEUE;
+}
+
+#endif