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Redefine Datum as uintptr_t, instead of unsigned long.

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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
This commit is contained in:
Tom Lane
2009-12-31 19:41:37 +00:00
parent 8abb011047
commit 85d02a6586
16 changed files with 751 additions and 423 deletions
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16
src/include/postgres.h
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@ -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;