Implement NTH.

[muddle-interpreter.git] / src / alloc.h

diff --git a/src/alloc.h b/src/alloc.h
index 239a7e0c281ed6e248d122dd2970c84d5293abf5..89e1dab7c83e5a04385589b4f3539201d9681a14 100644 (file)
--- a/src/alloc.h
+++ b/src/alloc.h
@@ -1,5 +1,5 @@
 /*
-Copyright (C) 2017 Keziah Wesley
+Copyright (C) 2017-2018 Keziah Wesley
 
 You can redistribute and/or modify this file under the terms of the
 GNU Affero General Public License as published by the Free Software
@@ -23,79 +23,31 @@ License along with this file. If not, see
 #include <stdbool.h>
 #include <stdint.h>
 
-/// 0, or a "pointer" to an object allocated in the pool and fully-initialized
 typedef uint32_t pool_ptr;
-/// 0, or a "pointer" to an object allocated in the heap and fully-initialized
 typedef int32_t heap_ptr;
 
 typedef union pool_object pool_object;
 typedef union object object;
+typedef union uv_val uv_val;
 
-extern char *pool;             // pool_object
-extern char *vhp_base;         // object
-extern char *vhp;              // object
+pool_object *POOL_OBJECT (pool_ptr p);
+object *HEAP_OBJECT (heap_ptr p);
+uv_val *UV_VAL (heap_ptr p);
 
-static inline pool_object *
-POOL_OBJECT (pool_ptr p)
+pool_ptr pool_alloc (uint32_t len);
+heap_ptr heap_alloc (uint32_t len);
+inline static heap_ptr
+heap_alloc_uv (uint32_t len)
 {
-  return (pool_object *) (uintptr_t) p;
-}
-
-static inline bool
-IS_VALID_POOL_OBJECT (pool_object * p)
-{
-  pool_ptr pp = (pool_ptr) (uintptr_t) p;
-  return (uintptr_t) pp == (uintptr_t) p;
-}
-
-static inline pool_ptr
-POOL_PTR (pool_object * p)
-{
-  pool_ptr pp = (pool_ptr) (uintptr_t) p;
-  assert (IS_VALID_POOL_OBJECT (p));
-  return pp;
-}
-
-// TODO make (heap_ptr)0 nullish
-static inline object *
-OBJECT_OF_HEAP_PTR (heap_ptr p)
-{
-  assert (p >= 0);
-  return (object *) (vhp_base + (p << 4));
-}
-
-static inline pool_object *
-pool_alloc (uint32_t len)
-{
-  char *pp = pool;
-  pool += (len << 4);
-  return (pool_object *) pp;
-}
-
-static inline heap_ptr
-HEAP_PTR_OF_OBJECT (object * p)
-{
-  assert ((uintptr_t) p >= (uintptr_t) vhp_base);
-  heap_ptr h = (heap_ptr) ((uintptr_t) p - (uintptr_t) vhp_base);
-  return h;
-}
-
-static inline object *
-heap_alloc (uint32_t len)
-{
-  enum
-  { DOPE_LEN = 1 };
-  char *p = vhp;
-  vhp += (len + DOPE_LEN) << 4;
-  return (object *) p;
+  // divide by 2 (rounding up), then add one for dope
+  return heap_alloc (((len + 1) >> 1) + 1);
 }
 
 // given a headerless array of objects of known size,
-// copy it backwards into newly-allocated pool space
+// copy it into newly-allocated pool space
+pool_ptr pool_copy_array (const pool_object * objs, uint32_t len);
+// same as above, but backwards
 pool_ptr pool_copy_array_rev (const pool_object * objs, uint32_t len);
-
-// given a headerless array of objects of known size,
-// copy it backwards into a newly-allocated vector body
 heap_ptr heap_copy_array_rev (const object * objs, uint32_t len);
 
 #endif // ALLOC_H