Expose ranges in snmalloc_core. (#496)

Also add a missing #pragma once that cause multiple includes to error.

src/backend/commitrange.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "../ds/ptrwrap.h"
+#include "../pal/pal_consts.h"
 
 namespace snmalloc
 {
@@ -43,4 +44,4 @@ namespace snmalloc
       parent->dealloc_range(base, size);
     }
   };
-} // namespace snmalloc
+} // namespace snmalloc

src/backend/empty_range.h

@@ -1,3 +1,4 @@
+#pragma once
 #include "../ds/ptrwrap.h"
 
 namespace snmalloc
@@ -28,4 +29,4 @@ namespace snmalloc
       return nullptr;
     }
   };
-} // namespace snmalloc
+} // namespace snmalloc

src/snmalloc_core.h

@@ -1,5 +1,15 @@
 #pragma once
 
+#include "backend/commitrange.h"
 #include "backend/commonconfig.h"
+#include "backend/empty_range.h"
+#include "backend/globalrange.h"
+#include "backend/largebuddyrange.h"
 #include "backend/pagemap.h"
+#include "backend/pagemapregisterrange.h"
+#include "backend/palrange.h"
+#include "backend/range_helpers.h"
+#include "backend/smallbuddyrange.h"
+#include "backend/statsrange.h"
+#include "backend/subrange.h"
 #include "mem/globalalloc.h"