New alloc set code using a memory block pool for small allocations.

Jan

3 files changed, 54 insertions, 10 deletions

diff --git a/src/include/utils/memutils.h b/src/include/utils/memutils.h
index 9e1adb796f6..0bf4f6ef13b 100644
--- a/src/include/utils/memutils.h
+++ b/src/include/utils/memutils.h
@@ -15,7 +15,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: memutils.h,v 1.19 1998/12/26 18:15:53 momjian Exp $
+ * $Id: memutils.h,v 1.20 1999/02/06 16:50:33 wieck Exp $
  *
  * NOTES
  *	  some of the information in this file will be moved to
@@ -209,12 +209,40 @@ typedef enum AllocMode
 #define DefaultAllocMode		DynamicAllocMode
 
 /*
+ * AllocBlock --
+ *		Small pieces of memory are taken from bigger blocks of
+ *		memory with a size aligned to a power of two. These
+ *		pieces are not free's separately, instead they are reused
+ *		for the next allocation of a fitting size.
+ */
+typedef struct AllocBlockData {
+	struct AllocSetData			*aset;
+	struct AllocBlockData		*next;
+	char						*freeptr;
+	char						*endptr;
+} AllocBlockData;
+
+typedef AllocBlockData *AllocBlock;
+
+/*
+ * AllocChunk --
+ *		The prefix of each piece of memory in an AllocBlock
+ */
+typedef struct AllocChunkData {
+	void						*aset;
+	Size						size;
+} AllocChunkData;
+
+typedef AllocChunkData *AllocChunk;
+
+/*
  * AllocSet --
  *		Allocation set.
  */
 typedef struct AllocSetData
 {
-	OrderedSetData setData;
+	struct AllocBlockData		*blocks;
+	struct AllocChunkData		*freelist[8];
 	/* Note: this will change in the future to support other modes */
 } AllocSetData;
 
diff --git a/src/include/utils/palloc.h b/src/include/utils/palloc.h
index 2c969df174c..05fccc81a32 100644
--- a/src/include/utils/palloc.h
+++ b/src/include/utils/palloc.h
@@ -6,18 +6,34 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: palloc.h,v 1.6 1998/09/01 04:39:24 momjian Exp $
+ * $Id: palloc.h,v 1.7 1999/02/06 16:50:34 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
 #ifndef PALLOC_H
 #define PALLOC_H
 
-#include <c.h>
+#include "c.h"
 
-extern void *palloc(Size size);
-extern void pfree(void *pointer);
-extern void *repalloc(void *pointer, Size size);
+#ifdef PALLOC_IS_MALLOC
+
+#  define palloc(s)		malloc(s)
+#  define pfree(p)		free(p)
+#  define repalloc(p,s)	realloc((p),(s))
+
+#else /* ! PALLOC_IS_MALLOC */
+
+/* ----------
+ * In the case we use memory contexts, use macro's for palloc() etc.
+ * ----------
+ */
+#  include "utils/mcxt.h"
+
+#  define palloc(s)		((void *)MemoryContextAlloc(CurrentMemoryContext,(Size)(s)))
+#  define pfree(p)		MemoryContextFree(CurrentMemoryContext,(Pointer)(p))
+#  define repalloc(p,s)	((void *)MemoryContextRealloc(CurrentMemoryContext,(Pointer)(p),(Size)(s)))
+
+#endif /* PALLOC_IS_MALLOC */
 
 /* like strdup except uses palloc */
 extern char *pstrdup(char *pointer);
diff --git a/src/include/utils/portal.h b/src/include/utils/portal.h
index 2c739721214..b718221cb55 100644
--- a/src/include/utils/portal.h
+++ b/src/include/utils/portal.h
@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: portal.h,v 1.10 1998/09/01 04:39:25 momjian Exp $
+ * $Id: portal.h,v 1.11 1999/02/06 16:50:34 wieck Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -44,8 +44,8 @@ typedef PortalD *Portal;
 struct PortalD
 {
 	char	   *name;			/* XXX PortalName */
-	struct PortalVariableMemory variable;
-	struct PortalHeapMemory heap;
+	struct PortalVariableMemoryData variable;
+	struct PortalHeapMemoryData heap;
 	QueryDesc  *queryDesc;
 	TupleDesc	attinfo;
 	EState	   *state;