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Allow float8, int8, and related datatypes to be passed by value on machines

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where Datum is 8 bytes wide.  Since this will break old-style C functions
(those still using version 0 calling convention) that have arguments or
results of these types, provide a configure option to disable it and retain
the old pass-by-reference behavior.  Likewise, provide a configure option
to disable the recently-committed float4 pass-by-value change.

Zoltan Boszormenyi, plus configurability stuff by me.
This commit is contained in:
Tom Lane
2008-04-21 00:26:47 +00:00
parent be939544a6
commit 8472bf7a73
36 changed files with 661 additions and 243 deletions
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15
src/backend/utils/init/flatfiles.c
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@@ -23,7 +23,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/utils/init/flatfiles.c,v 1.32 2008/03/26 21:10:39 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/utils/init/flatfiles.c,v 1.33 2008/04/21 00:26:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -483,13 +483,14 @@ write_auth_file(Relation rel_authid, Relation rel_authmem)
}
else
{
/*
* rolvaliduntil is timestamptz, which we assume is double
* alignment and pass-by-reference.
*/
TimestampTz *rvup;
/* Assume timestamptz has double alignment */
off = att_align_nominal(off, 'd');
datum = PointerGetDatum(tp + off);
auth_info[curr_role].rolvaliduntil = DatumGetCString(DirectFunctionCall1(timestamptz_out, datum));
rvup = (TimestampTz *) (tp + off);
auth_info[curr_role].rolvaliduntil =
DatumGetCString(DirectFunctionCall1(timestamptz_out,
TimestampTzGetDatum(*rvup)));
}
/*