Redefine Datum as uintptr_t, instead of unsigned long.

This is more in keeping with modern practice, and is a first step towards
porting to Win64 (which has sizeof(pointer) > sizeof(long)).

Tsutomu Yamada, Magnus Hagander, Tom Lane

Author: tglsfdc

configure

@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.616 2009/12/11 02:21:21 momjian Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.617 2009/12/31 19:41:33 tgl Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -1095,6 +1095,8 @@ PGAC_STRUCT_SOCKADDR_UN
 PGAC_STRUCT_SOCKADDR_STORAGE
 PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
 PGAC_STRUCT_ADDRINFO
+AC_TYPE_INTPTR_T
+AC_TYPE_UINTPTR_T
 
 AC_CHECK_TYPES([struct cmsgcred, struct fcred, struct sockcred], [], [],
 [#include <sys/param.h>
@@ -1555,12 +1557,10 @@ if test $pgac_need_repl_snprintf = yes; then
   AC_LIBOBJ(snprintf)
 fi
 
-# Need a #define for the size of Datum (unsigned long)
-AC_CHECK_SIZEOF([unsigned long])
-
-# And check size of void *, size_t (enables tweaks for > 32bit address space)
+# Check size of void *, size_t (enables tweaks for > 32bit address space)
 AC_CHECK_SIZEOF([void *])
 AC_CHECK_SIZEOF([size_t])
+AC_CHECK_SIZEOF([long])
 
 # Decide whether float4 is passed by value: user-selectable, enabled by default
 AC_MSG_CHECKING([whether to build with float4 passed by value])   
@@ -1577,7 +1577,7 @@ AC_DEFINE_UNQUOTED([FLOAT4PASSBYVAL], [$float4passbyval], [float4 values are pas
 # If sizeof(Datum) >= 8, this is user-selectable, enabled by default.
 # If not, trying to select it is an error.
 AC_MSG_CHECKING([whether to build with float8 passed by value])
-if test $ac_cv_sizeof_unsigned_long -ge 8 ; then
+if test $ac_cv_sizeof_void_p -ge 8 ; then
   PGAC_ARG_BOOL(enable, float8-byval, yes, [disable float8 passed by value])
 else
   PGAC_ARG_BOOL(enable, float8-byval, no, [disable float8 passed by value])

configure.in

@@ -50,7 +50,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/common/heaptuple.c,v 1.127 2009/06/11 14:48:53 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/common/heaptuple.c,v 1.128 2009/12/31 19:41:33 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -192,7 +192,7 @@ heap_fill_tuple(TupleDesc tupleDesc,
 		if (att[i]->attbyval)
 		{
 			/* pass-by-value */
-			data = (char *) att_align_nominal((long) data, att[i]->attalign);
+			data = (char *) att_align_nominal(data, att[i]->attalign);
 			store_att_byval(data, values[i], att[i]->attlen);
 			data_length = att[i]->attlen;
 		}
@@ -226,7 +226,7 @@ heap_fill_tuple(TupleDesc tupleDesc,
 			else
 			{
 				/* full 4-byte header varlena */
-				data = (char *) att_align_nominal((long) data,
+				data = (char *) att_align_nominal(data,
 												  att[i]->attalign);
 				data_length = VARSIZE(val);
 				memcpy(data, val, data_length);
@@ -243,7 +243,7 @@ heap_fill_tuple(TupleDesc tupleDesc,
 		else
 		{
 			/* fixed-length pass-by-reference */
-			data = (char *) att_align_nominal((long) data, att[i]->attalign);
+			data = (char *) att_align_nominal(data, att[i]->attalign);
 			Assert(att[i]->attlen > 0);
 			data_length = att[i]->attlen;
 			memcpy(data, DatumGetPointer(values[i]), data_length);

src/backend/access/common/heaptuple.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/hash/hashfunc.c,v 1.59 2009/06/11 14:48:53 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/hash/hashfunc.c,v 1.60 2009/12/31 19:41:33 tgl Exp $
  *
  * NOTES
  *	  These functions are stored in pg_amproc.	For each operator class
@@ -319,7 +319,7 @@ hash_any(register const unsigned char *k, register int keylen)
 	a = b = c = 0x9e3779b9 + len + 3923095;
 
 	/* If the source pointer is word-aligned, we use word-wide fetches */
-	if (((long) k & UINT32_ALIGN_MASK) == 0)
+	if (((intptr_t) k & UINT32_ALIGN_MASK) == 0)
 	{
 		/* Code path for aligned source data */
 		register const uint32 *ka = (const uint32 *) k;

src/backend/access/hash/hashfunc.c

@@ -20,7 +20,7 @@ tas(lock)
      * LDCWX requires that we align the "semaphore" to a 16-byte
      * boundary.  The actual datum is a single word (4 bytes).
      */
-    lock = ((long) lock + 15) & ~15;
+    lock = ((uintptr_t) lock + 15) & ~15;
 
     /*
      * The LDCWX instruction atomically clears the target word and

src/backend/port/hpux/tas.c.template

@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.53 2009/01/01 17:23:48 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.54 2009/12/31 19:41:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -245,7 +245,7 @@ CreateLWLocks(void)
 	ptr += 2 * sizeof(int);
 
 	/* Ensure desired alignment of LWLock array */
-	ptr += LWLOCK_PADDED_SIZE - ((unsigned long) ptr) % LWLOCK_PADDED_SIZE;
+	ptr += LWLOCK_PADDED_SIZE - ((uintptr_t) ptr) % LWLOCK_PADDED_SIZE;
 
 	LWLockArray = (LWLockPadded *) ptr;
 

src/backend/storage/lmgr/lwlock.c

@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.529 2009/12/21 01:34:11 rhaas Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.530 2009/12/31 19:41:34 tgl Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -87,7 +87,8 @@
 #endif
 
 /* upper limit for GUC variables measured in kilobytes of memory */
-#if SIZEOF_SIZE_T > 4
+/* note that various places assume the byte size fits in a "long" variable */
+#if SIZEOF_SIZE_T > 4 && SIZEOF_LONG > 4
 #define MAX_KILOBYTES	INT_MAX
 #else
 #define MAX_KILOBYTES	(INT_MAX / 1024)

src/backend/utils/misc/guc.c

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/access/tupmacs.h,v 1.36 2009/01/01 17:23:56 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/access/tupmacs.h,v 1.37 2009/12/31 19:41:35 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -100,7 +100,8 @@
  */
 #define att_align_datum(cur_offset, attalign, attlen, attdatum) \
 ( \
-	((attlen) == -1 && VARATT_IS_SHORT(DatumGetPointer(attdatum))) ? (long) (cur_offset) : \
+	((attlen) == -1 && VARATT_IS_SHORT(DatumGetPointer(attdatum))) ? \
+	(intptr_t) (cur_offset) : \
 	att_align_nominal(cur_offset, attalign) \
 )
 
@@ -115,12 +116,13 @@
  * aligned 4-byte length word; in either case we need not align.)
  *
  * Note: some callers pass a "char *" pointer for cur_offset.  This is
- * a bit of a hack but works OK on all known platforms.  It ought to be
- * cleaned up someday, though.
+ * a bit of a hack but should work all right as long as intptr_t is the
+ * correct width.
  */
 #define att_align_pointer(cur_offset, attalign, attlen, attptr) \
 ( \
-	((attlen) == -1 && VARATT_NOT_PAD_BYTE(attptr)) ? (long) (cur_offset) : \
+	((attlen) == -1 && VARATT_NOT_PAD_BYTE(attptr)) ? \
+	(intptr_t) (cur_offset) : \
 	att_align_nominal(cur_offset, attalign) \
 )
 
@@ -142,7 +144,7 @@
 #define att_align_nominal(cur_offset, attalign) \
 ( \
 	((attalign) == 'i') ? INTALIGN(cur_offset) : \
-	 (((attalign) == 'c') ? (long) (cur_offset) : \
+	 (((attalign) == 'c') ? (intptr_t) (cur_offset) : \
 	  (((attalign) == 'd') ? DOUBLEALIGN(cur_offset) : \
 	   ( \
 			AssertMacro((attalign) == 's'), \

src/include/access/tupmacs.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/c.h,v 1.236 2009/06/11 14:49:08 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/c.h,v 1.237 2009/12/31 19:41:35 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -72,6 +72,9 @@
 #ifdef HAVE_STRINGS_H
 #include <strings.h>
 #endif
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
 #include <sys/types.h>
 
 #include <errno.h>
@@ -492,7 +495,7 @@ typedef NameData *Name;
  *		True iff pointer is properly aligned to point to the given type.
  */
 #define PointerIsAligned(pointer, type) \
-		(((long)(pointer) % (sizeof (type))) == 0)
+		(((intptr_t)(pointer) % (sizeof (type))) == 0)
 
 #define OidIsValid(objectId)  ((bool) ((objectId) != InvalidOid))
 
@@ -538,7 +541,7 @@ typedef NameData *Name;
  */
 
 #define TYPEALIGN(ALIGNVAL,LEN)  \
-	(((long) (LEN) + ((ALIGNVAL) - 1)) & ~((long) ((ALIGNVAL) - 1)))
+	(((intptr_t) (LEN) + ((ALIGNVAL) - 1)) & ~((intptr_t) ((ALIGNVAL) - 1)))
 
 #define SHORTALIGN(LEN)			TYPEALIGN(ALIGNOF_SHORT, (LEN))
 #define INTALIGN(LEN)			TYPEALIGN(ALIGNOF_INT, (LEN))
@@ -549,7 +552,7 @@ typedef NameData *Name;
 #define BUFFERALIGN(LEN)		TYPEALIGN(ALIGNOF_BUFFER, (LEN))
 
 #define TYPEALIGN_DOWN(ALIGNVAL,LEN)  \
-	(((long) (LEN)) & ~((long) ((ALIGNVAL) - 1)))
+	(((intptr_t) (LEN)) & ~((intptr_t) ((ALIGNVAL) - 1)))
 
 #define SHORTALIGN_DOWN(LEN)	TYPEALIGN_DOWN(ALIGNOF_SHORT, (LEN))
 #define INTALIGN_DOWN(LEN)		TYPEALIGN_DOWN(ALIGNOF_INT, (LEN))
@@ -630,7 +633,7 @@ typedef NameData *Name;
 		int		_val = (val); \
 		Size	_len = (len); \
 \
-		if ((((long) _vstart) & LONG_ALIGN_MASK) == 0 && \
+		if ((((intptr_t) _vstart) & LONG_ALIGN_MASK) == 0 && \
 			(_len & LONG_ALIGN_MASK) == 0 && \
 			_val == 0 && \
 			_len <= MEMSET_LOOP_LIMIT && \

src/include/c.h

@@ -236,6 +236,9 @@
 /* Define to 1 if the system has the type `int8'. */
 #undef HAVE_INT8
 
+/* Define to 1 if the system has the type `intptr_t'. */
+#undef HAVE_INTPTR_T
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
@@ -599,6 +602,9 @@
 /* Define to 1 if the system has the type `uint8'. */
 #undef HAVE_UINT8
 
+/* Define to 1 if the system has the type `uintptr_t'. */
+#undef HAVE_UINTPTR_T
+
 /* Define to 1 if the system has the type `union semun'. */
 #undef HAVE_UNION_SEMUN
 
@@ -705,15 +711,15 @@
    RELSEG_SIZE requires an initdb. */
 #undef RELSEG_SIZE
 
+/* The size of `long', as computed by sizeof. */
+#undef SIZEOF_LONG
+
 /* The size of `off_t', as computed by sizeof. */
 #undef SIZEOF_OFF_T
 
 /* The size of `size_t', as computed by sizeof. */
 #undef SIZEOF_SIZE_T
 
-/* The size of `unsigned long', as computed by sizeof. */
-#undef SIZEOF_UNSIGNED_LONG
-
 /* The size of `void *', as computed by sizeof. */
 #undef SIZEOF_VOID_P
 
@@ -827,9 +833,17 @@
 #undef inline
 #endif
 
+/* Define to the type of a signed integer type wide enough to hold a pointer,
+   if such a type exists, and if the system does not define it. */
+#undef intptr_t
+
 /* Define to empty if the C compiler does not understand signed types. */
 #undef signed
 
+/* Define to the type of an unsigned integer type wide enough to hold a
+   pointer, if such a type exists, and if the system does not define it. */
+#undef uintptr_t
+
 /* Define to empty if the keyword `volatile' does not work. Warning: valid
    code using `volatile' can become incorrect without. Disable with care. */
 #undef volatile

src/include/pg_config.h.in

@@ -347,7 +347,7 @@
 /* #undef HAVE_SRANDOM */
 
 /* Define to 1 if you have the <stdint.h> header file. */
-#define HAVE_STDINT_H 1
+/* #undef HAVE_STDINT_H */
 
 /* Define to 1 if you have the <stdlib.h> header file. */
 #define HAVE_STDLIB_H 1
@@ -585,11 +585,14 @@
    your system. */
 /* #undef PTHREAD_CREATE_JOINABLE */
 
-/* The size of a `size_t', as computed by sizeof. */
+/* The size of `long', as computed by sizeof. */
+#define SIZEOF_LONG 4
+
+/* The size of `size_t', as computed by sizeof. */
 #define SIZEOF_SIZE_T 4
 
-/* The size of a `unsigned long', as computed by sizeof. */
-#define SIZEOF_UNSIGNED_LONG 4
+/* The size of `void *', as computed by sizeof. */
+#define SIZEOF_VOID_P 4
 
 /* Define to 1 if you have the ANSI C header files. */
 #define STDC_HEADERS 1

src/include/pg_config.h.win32

@@ -10,7 +10,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1995, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/postgres.h,v 1.92 2009/01/01 17:23:55 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/postgres.h,v 1.93 2009/12/31 19:41:35 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -285,16 +285,10 @@ typedef struct
 
 /*
  * Port Notes:
- *	Postgres makes the following assumption about machines:
- *
- *	sizeof(Datum) == sizeof(long) >= sizeof(void *) >= 4
- *
- *	Postgres also assumes that
+ *	Postgres makes the following assumptions about datatype sizes:
  *
+ *	sizeof(Datum) == sizeof(void *) == 4 or 8
  *	sizeof(char) == 1
- *
- *	and that
- *
  *	sizeof(short) == 2
  *
  * When a type narrower than Datum is stored in a Datum, we place it in the
@@ -305,9 +299,9 @@ typedef struct
  * or short may contain garbage when called as if it returned Datum.
  */
 
-typedef unsigned long Datum;	/* XXX sizeof(long) >= sizeof(void *) */
+typedef uintptr_t Datum;
 
-#define SIZEOF_DATUM SIZEOF_UNSIGNED_LONG
+#define SIZEOF_DATUM SIZEOF_VOID_P
 
 typedef Datum *DatumPtr;
 

src/include/postgres.h

@@ -66,7 +66,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	  $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.167 2009/07/27 05:31:05 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.168 2009/12/31 19:41:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -683,7 +683,7 @@ typedef struct
 	int			sema[4];
 } slock_t;
 
-#define TAS_ACTIVE_WORD(lock)	((volatile int *) (((long) (lock) + 15) & ~15))
+#define TAS_ACTIVE_WORD(lock)	((volatile int *) (((uintptr_t) (lock) + 15) & ~15))
 
 #if defined(__GNUC__)