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authorRickard Green <[email protected]>2015-11-12 16:15:05 +0100
committerRickard Green <[email protected]>2015-11-12 16:15:05 +0100
commit4f815fab536a3ec1839c2590b8f4f169a27fccac (patch)
tree49d1539f21954ffcdcb2523de1319d2d3efbf0ef /erts/emulator/beam/erl_term.h
parentef72a791f4dc9a1816ac8ff95a612409b86de818 (diff)
parent3ac08f9b668613a4292436979eacc61863c2ab94 (diff)
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Merge branch 'rickard/ohmq/OTP-13047'
* rickard/ohmq/OTP-13047: Fragmented young heap generation and off_heap_message_queue option Refactor GC Introduce literal tag Conflicts: erts/doc/src/erlang.xml erts/emulator/beam/erl_gc.c
Diffstat (limited to 'erts/emulator/beam/erl_term.h')
-rw-r--r--erts/emulator/beam/erl_term.h44
1 files changed, 41 insertions, 3 deletions
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h
index 01ef567dcd..2b28762db5 100644
--- a/erts/emulator/beam/erl_term.h
+++ b/erts/emulator/beam/erl_term.h
@@ -21,6 +21,8 @@
#ifndef __ERL_TERM_H
#define __ERL_TERM_H
+#include "erl_mmap.h"
+
typedef UWord Wterm; /* Full word terms */
struct erl_node_; /* Declared in erl_node_tables.h */
@@ -48,6 +50,24 @@ struct erl_node_; /* Declared in erl_node_tables.h */
#define _ET_APPLY(F,X) _unchecked_##F(X)
#endif
+#if defined(ARCH_64)
+# define TAG_PTR_MASK__ 0x7
+# if !defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
+# ifdef HIPE
+# error Hipe on 64-bit needs a real mmap as it does not support the literal tag
+# endif
+# define TAG_LITERAL_PTR 0x4
+# else
+# undef TAG_LITERAL_PTR
+# endif
+#elif defined(ARCH_32)
+# define TAG_PTR_MASK__ 0x3
+# undef TAG_LITERAL_PTR
+#else
+# error Not supported arch
+#endif
+
+
#define _TAG_PRIMARY_SIZE 2
#define _TAG_PRIMARY_MASK 0x3
#define TAG_PRIMARY_HEADER 0x0
@@ -165,10 +185,11 @@ struct erl_node_; /* Declared in erl_node_tables.h */
/* boxed object access methods */
-#define _is_taggable_pointer(x) (((Uint)(x) & 0x3) == 0)
+#define _is_taggable_pointer(x) (((Uint)(x) & TAG_PTR_MASK__) == 0)
+
#define _boxed_precond(x) (is_boxed(x))
-#define _is_aligned(x) (((Uint)(x) & 0x3) == 0)
+#define _is_aligned(x) (((Uint)(x) & TAG_PTR_MASK__) == 0)
#define _unchecked_make_boxed(x) ((Uint)(x) + TAG_PRIMARY_BOXED)
_ET_DECLARE_CHECKED(Eterm,make_boxed,const Eterm*)
#define make_boxed(x) _ET_APPLY(make_boxed,(x))
@@ -180,7 +201,11 @@ _ET_DECLARE_CHECKED(int,is_boxed,Eterm)
#else
#define is_boxed(x) (((x) & _TAG_PRIMARY_MASK) == TAG_PRIMARY_BOXED)
#endif
+#ifdef TAG_LITERAL_PTR
+#define _unchecked_boxed_val(x) _unchecked_ptr_val(x)
+#else
#define _unchecked_boxed_val(x) ((Eterm*) ((x) - TAG_PRIMARY_BOXED))
+#endif
_ET_DECLARE_CHECKED(Eterm*,boxed_val,Wterm)
#define boxed_val(x) _ET_APPLY(boxed_val,(x))
@@ -198,7 +223,11 @@ _ET_DECLARE_CHECKED(int,is_not_list,Eterm)
#define is_not_list(x) (!is_list((x)))
#endif
#define _list_precond(x) (is_list(x))
+#ifdef TAG_LITERAL_PTR
+#define _unchecked_list_val(x) _unchecked_ptr_val(x)
+#else
#define _unchecked_list_val(x) ((Eterm*) ((x) - TAG_PRIMARY_LIST))
+#endif
_ET_DECLARE_CHECKED(Eterm*,list_val,Wterm)
#define list_val(x) _ET_APPLY(list_val,(x))
@@ -209,13 +238,20 @@ _ET_DECLARE_CHECKED(Eterm*,list_val,Wterm)
#define CDR(x) ((x)[1])
/* generic tagged pointer (boxed or list) access methods */
-#define _unchecked_ptr_val(x) ((Eterm*) ((x) & ~((Uint) 0x3)))
+#define _unchecked_ptr_val(x) ((Eterm*) ((x) & ~((Uint) TAG_PTR_MASK__)))
#define ptr_val(x) _unchecked_ptr_val((x)) /*XXX*/
#define _unchecked_offset_ptr(x,offs) ((x)+((offs)*sizeof(Eterm)))
#define offset_ptr(x,offs) _unchecked_offset_ptr(x,offs) /*XXX*/
#define _unchecked_byte_offset_ptr(x,byte_offs) ((x)+(offs))
#define byte_offset_ptr(x,offs) _unchecked_byte_offset_ptr(x,offs) /*XXX*/
+#ifdef TAG_LITERAL_PTR
+#define _unchecked_is_not_literal_ptr(x) (!((x) & TAG_LITERAL_PTR))
+#define is_not_literal_ptr(x) _unchecked_is_not_literal_ptr((x)) /*XXX*/
+#define is_literal_ptr(x) (!is_not_literal_ptr((x))) /*XXX*/
+#endif
+
+
/* fixnum ("small") access methods */
#if defined(ARCH_64)
#define SMALL_BITS (64-4)
@@ -1114,5 +1150,7 @@ extern unsigned tag_val_def(Wterm);
#define is_same(A,B) ((A)==(B))
+void erts_set_literal_tag(Eterm *term, Eterm *hp_start, Eterm hsz);
+
#endif /* __ERL_TERM_H */