mirror of
https://github.com/postgres/postgres.git
synced 2025-04-22 23:02:54 +03:00
Clean up att_align calculations so that XXXALIGN macros
need not be bogus.
This commit is contained in:
Tom Lane
parent
d471f8073a
commit
6febecc569
@ -7,7 +7,7 @@
|
||||
* Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.56 1999/03/17 22:52:45 momjian Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.57 1999/03/25 03:49:25 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -605,8 +605,28 @@ DefineAttr(char *name, char *type, int attnum)
|
||||
printf("<%s %s> ", attrtypes[attnum]->attname.data, type);
|
||||
attrtypes[attnum]->attnum = 1 + attnum; /* fillatt */
|
||||
attlen = attrtypes[attnum]->attlen = Procid[typeoid].len;
|
||||
attrtypes[attnum]->attbyval = (attlen == 1) || (attlen == 2) || (attlen == 4);
|
||||
attrtypes[attnum]->attalign = 'i';
|
||||
/* Cheat like mad to fill in these items from the length only.
|
||||
* This only has to work for types used in the system catalogs...
|
||||
*/
|
||||
switch (attlen)
|
||||
{
|
||||
case 1:
|
||||
attrtypes[attnum]->attbyval = true;
|
||||
attrtypes[attnum]->attalign = 'c';
|
||||
break;
|
||||
case 2:
|
||||
attrtypes[attnum]->attbyval = true;
|
||||
attrtypes[attnum]->attalign = 's';
|
||||
break;
|
||||
case 4:
|
||||
attrtypes[attnum]->attbyval = true;
|
||||
attrtypes[attnum]->attalign = 'i';
|
||||
break;
|
||||
default:
|
||||
attrtypes[attnum]->attbyval = false;
|
||||
attrtypes[attnum]->attalign = 'i';
|
||||
break;
|
||||
}
|
||||
}
|
||||
attrtypes[attnum]->attcacheoff = -1;
|
||||
attrtypes[attnum]->atttypmod = -1;
|
||||
|
||||
@ -6,7 +6,7 @@
|
||||
*
|
||||
* Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: tupmacs.h,v 1.8 1999/02/13 23:20:59 momjian Exp $
|
||||
* $Id: tupmacs.h,v 1.9 1999/03/25 03:49:26 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -62,41 +62,20 @@
|
||||
(char *) (T) \
|
||||
)
|
||||
|
||||
/* att_align aligns the given offset as needed for a datum of length attlen
|
||||
* and alignment requirement attalign. In practice we don't need the length.
|
||||
* The attalign cases are tested in what is hopefully something like their
|
||||
* frequency of occurrence.
|
||||
*/
|
||||
#define att_align(cur_offset, attlen, attalign) \
|
||||
( \
|
||||
((attlen) < sizeof(int32)) ? \
|
||||
( \
|
||||
((attlen) == -1) ? \
|
||||
((attalign) == 'i') ? INTALIGN(cur_offset) : \
|
||||
(((attalign) == 'c') ? ((long)(cur_offset)) : \
|
||||
(((attalign) == 'd') ? DOUBLEALIGN(cur_offset) : \
|
||||
( \
|
||||
((attalign) == 'd') ? DOUBLEALIGN(cur_offset) : \
|
||||
INTALIGN(cur_offset) \
|
||||
) \
|
||||
: \
|
||||
( \
|
||||
((attlen) == sizeof(char)) ? \
|
||||
( \
|
||||
(long)(cur_offset) \
|
||||
) \
|
||||
: \
|
||||
( \
|
||||
AssertMacro((attlen) == sizeof(short)), \
|
||||
SHORTALIGN(cur_offset) \
|
||||
) \
|
||||
) \
|
||||
) \
|
||||
: \
|
||||
( \
|
||||
((attlen) == sizeof(int32)) ? \
|
||||
( \
|
||||
INTALIGN(cur_offset) \
|
||||
) \
|
||||
: \
|
||||
( \
|
||||
AssertMacro((attlen) > sizeof(int32)), \
|
||||
((attalign) == 'd') ? DOUBLEALIGN(cur_offset) : \
|
||||
LONGALIGN(cur_offset) \
|
||||
) \
|
||||
) \
|
||||
AssertMacro((attalign) == 's'), \
|
||||
SHORTALIGN(cur_offset) \
|
||||
))) \
|
||||
)
|
||||
|
||||
#define att_addlength(cur_offset, attlen, attval) \
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
*
|
||||
* Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: pg_type.h,v 1.55 1999/03/10 05:02:34 tgl Exp $
|
||||
* $Id: pg_type.h,v 1.56 1999/03/25 03:49:25 tgl Exp $
|
||||
*
|
||||
* NOTES
|
||||
* the genbki.sh script reads this file and generates .bki
|
||||
@ -21,7 +21,7 @@
|
||||
#include <utils/rel.h>
|
||||
|
||||
/* ----------------
|
||||
* postgres.h contains the system type definintions and the
|
||||
* postgres.h contains the system type definitions and the
|
||||
* CATALOG(), BOOTSTRAP and DATA() sugar words so this file
|
||||
* can be read by both genbki.sh and the C compiler.
|
||||
* ----------------
|
||||
@ -53,36 +53,30 @@ CATALOG(pg_type) BOOTSTRAP
|
||||
|
||||
/*
|
||||
* typbyval determines whether internal Postgres routines pass a value
|
||||
* of this type by value or by reference. Postgres uses a 4 byte area
|
||||
* for passing a field value info, so if the value is not 1, 2, or 4
|
||||
* bytes long, Postgres does not have the option of passing by value
|
||||
* and ignores typbyval.
|
||||
*
|
||||
* (I don't understand why this column exists. The above description may
|
||||
* be an oversimplification. Also, there appear to be bugs in which
|
||||
* Postgres doesn't ignore typbyval when it should, but I'm afraid to
|
||||
* change them until I see proof of damage. -BRYANH 96.08).
|
||||
*
|
||||
* (Postgres crashes if typbyval is true, the declared length is 8, and
|
||||
* the I/O routines are written to expect pass by reference. Note that
|
||||
* float4 is written for pass by reference and has a declared length
|
||||
* of 4 bytes, so it looks like pass by reference must be consistant
|
||||
* with the declared length, and typbyval is used somewhere. - tgl
|
||||
* 1997-03-20).
|
||||
* of this type by value or by reference. Only char, short, and int-
|
||||
* equivalent items can be passed by value, so if the type is not
|
||||
* 1, 2, or 4 bytes long, Postgres does not have the option of passing
|
||||
* by value and so typbyval had better be FALSE. Variable-length types
|
||||
* are always passed by reference.
|
||||
* Note that typbyval can be false even if the length would allow
|
||||
* pass-by-value; this is currently true for type float4, for example.
|
||||
*/
|
||||
char typtype;
|
||||
|
||||
/*
|
||||
* typtype is 'b' for a basic type and 'c' for a catalog type (ie a class).
|
||||
* If typtype is 'c', typrelid is the OID of the class' entry in pg_class.
|
||||
* (Why do we need an entry in pg_type for classes, anyway?)
|
||||
*/
|
||||
bool typisdefined;
|
||||
char typdelim;
|
||||
Oid typrelid;
|
||||
Oid typrelid; /* 0 if not a class type */
|
||||
Oid typelem;
|
||||
|
||||
/*
|
||||
* typelem is NULL if this is not an array type. If this is an array
|
||||
* typelem is 0 if this is not an array type. If this is an array
|
||||
* type, typelem is the OID of the type of the elements of the array
|
||||
* (it identifies another row in Table pg_type).
|
||||
*
|
||||
* (Note that zero ("0") rather than _null_ is used in the declarations.
|
||||
* - tgl 97/03/20)
|
||||
*/
|
||||
regproc typinput;
|
||||
regproc typoutput;
|
||||
@ -90,7 +84,7 @@ CATALOG(pg_type) BOOTSTRAP
|
||||
regproc typsend;
|
||||
char typalign;
|
||||
|
||||
/*
|
||||
/* ----------------
|
||||
* typalign is the alignment required when storing a value of this
|
||||
* type. It applies to storage on disk as well as most
|
||||
* representations of the value inside Postgres. When multiple values
|
||||
@ -99,11 +93,18 @@ CATALOG(pg_type) BOOTSTRAP
|
||||
* type so that it begins on the specified boundary. The alignment
|
||||
* reference is the beginning of the first datum in the sequence.
|
||||
*
|
||||
* 'c' = 1 byte alignment. 's' = 2 byte alignment. 'i' = 4 byte
|
||||
* alignment. 'd' = 8 byte alignment.
|
||||
* 'c' = CHAR alignment, ie no alignment needed.
|
||||
* 's' = SHORT alignment (2 bytes on most machines).
|
||||
* 'i' = INT alignment (4 bytes on most machines).
|
||||
* 'd' = DOUBLE alignment (8 bytes on many machines, but by no means all).
|
||||
*
|
||||
* (This might actually be flexible depending on machine architecture,
|
||||
* but I doubt it - BRYANH 96.08).
|
||||
* See include/utils/memutils.h for the macros that compute these
|
||||
* alignment requirements.
|
||||
*
|
||||
* NOTE: for types used in system tables, it is critical that the
|
||||
* size and alignment defined in pg_type agree with the way that the
|
||||
* compiler will lay out the field in a struct representing a table row.
|
||||
* ----------------
|
||||
*/
|
||||
text typdefault; /* VARIABLE LENGTH FIELD */
|
||||
} FormData_pg_type;
|
||||
@ -218,21 +219,21 @@ DESCR("array of 8 oid, used in system tables");
|
||||
DATA(insert OID = 32 ( SET PGUID -1 -1 f r t \054 0 -1 textin textout textin textout i _null_ ));
|
||||
DESCR("set of tuples");
|
||||
|
||||
DATA(insert OID = 71 ( pg_type PGUID -1 -1 t b t \054 1247 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 75 ( pg_attribute PGUID -1 -1 t b t \054 1249 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 81 ( pg_proc PGUID -1 -1 t b t \054 1255 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 83 ( pg_class PGUID -1 -1 t b t \054 1259 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 86 ( pg_shadow PGUID -1 -1 t b t \054 1260 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 87 ( pg_group PGUID -1 -1 t b t \054 1261 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 88 ( pg_database PGUID -1 -1 t b t \054 1262 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 90 ( pg_variable PGUID -1 -1 t b t \054 1264 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 99 ( pg_log PGUID -1 -1 t b t \054 1269 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 71 ( pg_type PGUID 4 4 t c t \054 1247 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 75 ( pg_attribute PGUID 4 4 t c t \054 1249 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 81 ( pg_proc PGUID 4 4 t c t \054 1255 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 83 ( pg_class PGUID 4 4 t c t \054 1259 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 86 ( pg_shadow PGUID 4 4 t c t \054 1260 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 87 ( pg_group PGUID 4 4 t c t \054 1261 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 88 ( pg_database PGUID 4 4 t c t \054 1262 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 90 ( pg_variable PGUID 4 4 t c t \054 1264 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 99 ( pg_log PGUID 4 4 t c t \054 1269 0 foo bar foo bar i _null_));
|
||||
|
||||
/* OIDS 100 - 199 */
|
||||
|
||||
DATA(insert OID = 109 ( pg_attrdef PGUID -1 -1 t b t \054 1215 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 110 ( pg_relcheck PGUID -1 -1 t b t \054 1216 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 111 ( pg_trigger PGUID -1 -1 t b t \054 1219 0 foo bar foo bar c _null_));
|
||||
DATA(insert OID = 109 ( pg_attrdef PGUID 4 4 t c t \054 1215 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 110 ( pg_relcheck PGUID 4 4 t c t \054 1216 0 foo bar foo bar i _null_));
|
||||
DATA(insert OID = 111 ( pg_trigger PGUID 4 4 t c t \054 1219 0 foo bar foo bar i _null_));
|
||||
|
||||
/* OIDS 200 - 299 */
|
||||
|
||||
|
||||
@ -6,7 +6,7 @@
|
||||
*
|
||||
* Copyright (c) 1995, Regents of the University of California
|
||||
*
|
||||
* $Id: postgres.h,v 1.20 1999/02/13 23:20:46 momjian Exp $
|
||||
* $Id: postgres.h,v 1.21 1999/03/25 03:49:28 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -92,9 +92,14 @@ typedef struct varlena text;
|
||||
typedef int2 int28[8];
|
||||
typedef Oid oid8[8];
|
||||
|
||||
typedef struct nameData
|
||||
/* We want NameData to have length NAMEDATALEN and int alignment,
|
||||
* because that's how the data type 'name' is defined in pg_type.
|
||||
* Use a union to make sure the compiler agrees.
|
||||
*/
|
||||
typedef union nameData
|
||||
{
|
||||
char data[NAMEDATALEN];
|
||||
int alignmentDummy;
|
||||
} NameData;
|
||||
typedef NameData *Name;
|
||||
|
||||
|
||||
@ -15,7 +15,7 @@
|
||||
*
|
||||
* Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: memutils.h,v 1.21 1999/02/13 23:22:25 momjian Exp $
|
||||
* $Id: memutils.h,v 1.22 1999/03/25 03:49:34 tgl Exp $
|
||||
*
|
||||
* NOTES
|
||||
* some of the information in this file will be moved to
|
||||
@ -27,76 +27,52 @@
|
||||
#define MEMUTILS_H
|
||||
|
||||
|
||||
#ifdef NOT_USED
|
||||
/*****************************************************************************
|
||||
* align.h - alignment macros *
|
||||
****************************************************************************
|
||||
[TRH] Let the compiler decide what alignment it uses instead of
|
||||
tending
|
||||
we know better.
|
||||
GCC (at least v2.5.8 and up) has an __alignof__ keyword.
|
||||
However, we cannot use it here since on some architectures it reports
|
||||
just a _recommended_ alignment instead of the actual alignment used in
|
||||
padding structures (or at least, this is how I understand gcc).
|
||||
So define a macro that gives us the _actual_ alignment inside a struct.
|
||||
{{note: assumes that alignment size is always a power of 2.}}
|
||||
/* ----------------
|
||||
* Alignment macros: align a length or address appropriately for a given type.
|
||||
*
|
||||
* It'd be best to use offsetof to check how the compiler aligns stuff,
|
||||
* but not all compilers support that (still true)? So we make the
|
||||
* conservative assumption that a type must be aligned on a boundary equal
|
||||
* to its own size, except on a few architectures where we know better.
|
||||
*
|
||||
* CAUTION: for the system tables, the struct declarations found in
|
||||
* src/include/pg_*.h had better be interpreted by the compiler in a way
|
||||
* that agrees with the workings of these macros. In practice that means
|
||||
* being careful to lay out the columns of a system table in a way that avoids
|
||||
* wasted pad space.
|
||||
*
|
||||
* CAUTION: _ALIGN will not work if sizeof(TYPE) is not a power of 2.
|
||||
* There are machines where sizeof(double) is not, for example.
|
||||
* But such a size is almost certainly not an alignment boundary anyway.
|
||||
* ----------------
|
||||
*/
|
||||
#define _ALIGNSIZE(TYPE) offsetof(struct { char __c; TYPE __t;}, __t)
|
||||
#define _ALIGN(TYPE, LEN) \
|
||||
(((long)(LEN) + (_ALIGNSIZE(TYPE) - 1)) & ~(_ALIGNSIZE(TYPE) - 1))
|
||||
|
||||
#define _ALIGN(TYPE,LEN) \
|
||||
(((long)(LEN) + (sizeof(TYPE) - 1)) & ~(sizeof(TYPE) - 1))
|
||||
|
||||
#define SHORTALIGN(LEN) _ALIGN(short, (LEN))
|
||||
|
||||
#if defined(m68k)
|
||||
#define INTALIGN(LEN) _ALIGN(short, (LEN))
|
||||
#else
|
||||
#define INTALIGN(LEN) _ALIGN(int, (LEN))
|
||||
#endif
|
||||
|
||||
#if (defined(sun) && ! defined(sparc)) || defined(m68k)
|
||||
#define LONGALIGN(LEN) _ALIGN(short, (LEN))
|
||||
#else
|
||||
#define LONGALIGN(LEN) _ALIGN(long, (LEN))
|
||||
#endif
|
||||
|
||||
#if defined(m68k)
|
||||
#define DOUBLEALIGN(LEN) _ALIGN(short, (LEN))
|
||||
#define MAXALIGN(LEN) _ALIGN(short, (LEN))
|
||||
#elif defined(sco)
|
||||
#define DOUBLEALIGN(LEN) _ALIGN(int, (LEN))
|
||||
#define MAXALIGN(LEN) _ALIGN(int, (LEN))
|
||||
#else
|
||||
#define DOUBLEALIGN(LEN) _ALIGN(double, (LEN))
|
||||
#define MAXALIGN(LEN) _ALIGN(double, (LEN))
|
||||
|
||||
#endif /* 0 */
|
||||
|
||||
/*
|
||||
* SHORTALIGN(LEN) - length (or address) aligned for shorts
|
||||
*/
|
||||
#define SHORTALIGN(LEN)\
|
||||
(((long)(LEN) + (sizeof (short) - 1)) & ~(sizeof (short) - 1))
|
||||
|
||||
#if defined(m68k)
|
||||
#define INTALIGN(LEN) SHORTALIGN(LEN)
|
||||
#else
|
||||
#define INTALIGN(LEN)\
|
||||
(((long)(LEN) + (sizeof (int) - 1)) & ~(sizeof (int) -1))
|
||||
#endif
|
||||
|
||||
/*
|
||||
* LONGALIGN(LEN) - length (or address) aligned for longs
|
||||
*/
|
||||
#if (defined(sun) && ! defined(sparc)) || defined(m68k)
|
||||
#define LONGALIGN(LEN) SHORTALIGN(LEN)
|
||||
#elif defined (__alpha)
|
||||
|
||||
/*
|
||||
* even though "long alignment" should really be on 8-byte boundaries for
|
||||
* linuxalpha, we want the strictest alignment to be on 4-byte (int)
|
||||
* boundaries, because otherwise things break when they try to use the
|
||||
* FormData_pg_* structures. --djm 12/12/96
|
||||
*/
|
||||
#define LONGALIGN(LEN)\
|
||||
(((long)(LEN) + (sizeof (int) - 1)) & ~(sizeof (int) -1))
|
||||
#else
|
||||
#define LONGALIGN(LEN)\
|
||||
(((long)(LEN) + (sizeof (long) - 1)) & ~(sizeof (long) -1))
|
||||
#endif
|
||||
|
||||
#if defined(m68k)
|
||||
#define DOUBLEALIGN(LEN) SHORTALIGN(LEN)
|
||||
#define MAXALIGN(LEN) SHORTALIGN(LEN)
|
||||
#elif ! defined(sco)
|
||||
#define DOUBLEALIGN(LEN)\
|
||||
(((long)(LEN) + (sizeof (double) - 1)) & ~(sizeof (double) -1))
|
||||
|
||||
#define MAXALIGN(LEN)\
|
||||
(((long)(LEN) + (sizeof (double) - 1)) & ~(sizeof (double) -1))
|
||||
#else
|
||||
#define DOUBLEALIGN(LEN) INTALIGN(LEN)
|
||||
#define MAXALIGN(LEN) INTALIGN(LEN)
|
||||
#endif
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user