current_start    2824 gc/os_dep.c        struct hblk * current_start;  /* Start of block to be protected. */
current_start    2837 gc/os_dep.c    	  current_start = current = (struct hblk *)start;
current_start    2851 gc/os_dep.c    	      GC_ASSERT(current_start == current);
current_start    2852 gc/os_dep.c    	      current_start = ++current;
current_start    2864 gc/os_dep.c    	      if (current_start < current) {
current_start    2865 gc/os_dep.c    		PROTECT(current_start, (ptr_t)current - (ptr_t)current_start);
current_start    2867 gc/os_dep.c    	      current_start = (current += nhblks);
current_start    2872 gc/os_dep.c    	  if (current_start < current) {
current_start    2873 gc/os_dep.c    	    PROTECT(current_start, (ptr_t)current - (ptr_t)current_start);