* child_info.h: Bump magic number.

(class child_info): Add an element.
* cygheap.cc (init_cheap): Allocate cygwin heap in shared memory area.
(cygheap_fixup_in_child): Map cygwin heap, passed from parent via shared memory
into correct address.
(cygheap_setup_for_child): New function.
* cygheap.h: Declare new functions.
* dcrt0.cc (dll_crt0_1): Accomodate new cygheap_fixup_in_child arguments.
Avoid protecting subproc_ready unless it is spawn/nowait.
* fork.cc (fork_parent): Use new cygheap_setup_for_child function to setup
cygwin heap info.  Close passed cygheap shared memory handle.
* spawn.cc (spawn_guts): Ditto.  Also, reorganize to avoid synchronization
between parent and child in non-P_OVERLAY case.
* sigproc.cc (wait_sig): Only signal subproc_ready when execing.

winsup/cygwin/shared.cc

@@ -86,7 +86,7 @@ open_shared (const char *name, HANDLE &shared_h, DWORD size, void *addr)
       /* Probably win95, so try without specifying the address.  */
       shared = (shared_info *) MapViewOfFileEx (shared_h,
 				       FILE_MAP_READ|FILE_MAP_WRITE,
-				       0,0,0,0);
+				       0, 0, 0, 0);
     }
 
   if (!shared)