mirror of https://github.com/postgres/postgres
but that was enough tedium for one day. Along the way, move the few support routines for types xid and cid into a more logical place.WIN32_DEV
Tom Lane
23 years ago
parent
b02832719c
commit
30f609484d
@ -1,72 +0,0 @@ |
||||
/*-------------------------------------------------------------------------
|
||||
* |
||||
* xid.c |
||||
* POSTGRES transaction identifier datatype. |
||||
* |
||||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group |
||||
* Portions Copyright (c) 1994, Regents of the University of California |
||||
* |
||||
* $Id: xid.c,v 1.35 2002/06/20 20:29:25 momjian Exp $ |
||||
* |
||||
*------------------------------------------------------------------------- |
||||
*/ |
||||
|
||||
#include "postgres.h" |
||||
|
||||
#include <limits.h> |
||||
|
||||
#include "access/xact.h" |
||||
|
||||
|
||||
#define PG_GETARG_TRANSACTIONID(n) DatumGetTransactionId(PG_GETARG_DATUM(n)) |
||||
#define PG_RETURN_TRANSACTIONID(x) return TransactionIdGetDatum(x) |
||||
|
||||
|
||||
Datum |
||||
xidin(PG_FUNCTION_ARGS) |
||||
{ |
||||
char *str = PG_GETARG_CSTRING(0); |
||||
|
||||
PG_RETURN_TRANSACTIONID((TransactionId) strtoul(str, NULL, 0)); |
||||
} |
||||
|
||||
Datum |
||||
xidout(PG_FUNCTION_ARGS) |
||||
{ |
||||
TransactionId transactionId = PG_GETARG_TRANSACTIONID(0); |
||||
|
||||
/* maximum 32 bit unsigned integer representation takes 10 chars */ |
||||
char *str = palloc(11); |
||||
|
||||
snprintf(str, 11, "%lu", (unsigned long) transactionId); |
||||
|
||||
PG_RETURN_CSTRING(str); |
||||
} |
||||
|
||||
/*
|
||||
* xideq - are two xids equal? |
||||
*/ |
||||
Datum |
||||
xideq(PG_FUNCTION_ARGS) |
||||
{ |
||||
TransactionId xid1 = PG_GETARG_TRANSACTIONID(0); |
||||
TransactionId xid2 = PG_GETARG_TRANSACTIONID(1); |
||||
|
||||
PG_RETURN_BOOL(TransactionIdEquals(xid1, xid2)); |
||||
} |
||||
|
||||
/*
|
||||
* xid_age - compute age of an XID (relative to current xact) |
||||
*/ |
||||
Datum |
||||
xid_age(PG_FUNCTION_ARGS) |
||||
{ |
||||
TransactionId xid = PG_GETARG_TRANSACTIONID(0); |
||||
TransactionId now = GetCurrentTransactionId(); |
||||
|
||||
/* Permanent XIDs are always infinitely old */ |
||||
if (!TransactionIdIsNormal(xid)) |
||||
PG_RETURN_INT32(INT_MAX); |
||||
|
||||
PG_RETURN_INT32((int32) (now - xid)); |
||||
} |
||||
@ -0,0 +1,169 @@ |
||||
/*-------------------------------------------------------------------------
|
||||
* |
||||
* xid.c |
||||
* POSTGRES transaction identifier and command identifier datatypes. |
||||
* |
||||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group |
||||
* Portions Copyright (c) 1994, Regents of the University of California |
||||
* |
||||
* |
||||
* IDENTIFICATION |
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/xid.c,v 1.1 2003/05/12 23:08:50 tgl Exp $ |
||||
* |
||||
*------------------------------------------------------------------------- |
||||
*/ |
||||
#include "postgres.h" |
||||
|
||||
#include <limits.h> |
||||
|
||||
#include "access/xact.h" |
||||
#include "libpq/pqformat.h" |
||||
#include "utils/builtins.h" |
||||
|
||||
|
||||
#define PG_GETARG_TRANSACTIONID(n) DatumGetTransactionId(PG_GETARG_DATUM(n)) |
||||
#define PG_RETURN_TRANSACTIONID(x) return TransactionIdGetDatum(x) |
||||
|
||||
#define PG_GETARG_COMMANDID(n) DatumGetCommandId(PG_GETARG_DATUM(n)) |
||||
#define PG_RETURN_COMMANDID(x) return CommandIdGetDatum(x) |
||||
|
||||
|
||||
Datum |
||||
xidin(PG_FUNCTION_ARGS) |
||||
{ |
||||
char *str = PG_GETARG_CSTRING(0); |
||||
|
||||
PG_RETURN_TRANSACTIONID((TransactionId) strtoul(str, NULL, 0)); |
||||
} |
||||
|
||||
Datum |
||||
xidout(PG_FUNCTION_ARGS) |
||||
{ |
||||
TransactionId transactionId = PG_GETARG_TRANSACTIONID(0); |
||||
|
||||
/* maximum 32 bit unsigned integer representation takes 10 chars */ |
||||
char *str = palloc(11); |
||||
|
||||
snprintf(str, 11, "%lu", (unsigned long) transactionId); |
||||
|
||||
PG_RETURN_CSTRING(str); |
||||
} |
||||
|
||||
/*
|
||||
* xidrecv - converts external binary format to xid |
||||
*/ |
||||
Datum |
||||
xidrecv(PG_FUNCTION_ARGS) |
||||
{ |
||||
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0); |
||||
|
||||
PG_RETURN_TRANSACTIONID((TransactionId) pq_getmsgint(buf, sizeof(TransactionId))); |
||||
} |
||||
|
||||
/*
|
||||
* xidsend - converts xid to binary format |
||||
*/ |
||||
Datum |
||||
xidsend(PG_FUNCTION_ARGS) |
||||
{ |
||||
TransactionId arg1 = PG_GETARG_TRANSACTIONID(0); |
||||
StringInfoData buf; |
||||
|
||||
pq_begintypsend(&buf); |
||||
pq_sendint(&buf, arg1, sizeof(arg1)); |
||||
PG_RETURN_BYTEA_P(pq_endtypsend(&buf)); |
||||
} |
||||
|
||||
/*
|
||||
* xideq - are two xids equal? |
||||
*/ |
||||
Datum |
||||
xideq(PG_FUNCTION_ARGS) |
||||
{ |
||||
TransactionId xid1 = PG_GETARG_TRANSACTIONID(0); |
||||
TransactionId xid2 = PG_GETARG_TRANSACTIONID(1); |
||||
|
||||
PG_RETURN_BOOL(TransactionIdEquals(xid1, xid2)); |
||||
} |
||||
|
||||
/*
|
||||
* xid_age - compute age of an XID (relative to current xact) |
||||
*/ |
||||
Datum |
||||
xid_age(PG_FUNCTION_ARGS) |
||||
{ |
||||
TransactionId xid = PG_GETARG_TRANSACTIONID(0); |
||||
TransactionId now = GetCurrentTransactionId(); |
||||
|
||||
/* Permanent XIDs are always infinitely old */ |
||||
if (!TransactionIdIsNormal(xid)) |
||||
PG_RETURN_INT32(INT_MAX); |
||||
|
||||
PG_RETURN_INT32((int32) (now - xid)); |
||||
} |
||||
|
||||
|
||||
/*****************************************************************************
|
||||
* COMMAND IDENTIFIER ROUTINES * |
||||
*****************************************************************************/ |
||||
|
||||
/*
|
||||
* cidin - converts CommandId to internal representation. |
||||
*/ |
||||
Datum |
||||
cidin(PG_FUNCTION_ARGS) |
||||
{ |
||||
char *s = PG_GETARG_CSTRING(0); |
||||
CommandId c; |
||||
|
||||
c = atoi(s); |
||||
|
||||
PG_RETURN_COMMANDID(c); |
||||
} |
||||
|
||||
/*
|
||||
* cidout - converts a cid to external representation. |
||||
*/ |
||||
Datum |
||||
cidout(PG_FUNCTION_ARGS) |
||||
{ |
||||
CommandId c = PG_GETARG_COMMANDID(0); |
||||
char *result = (char *) palloc(16); |
||||
|
||||
snprintf(result, 16, "%u", (unsigned int) c); |
||||
PG_RETURN_CSTRING(result); |
||||
} |
||||
|
||||
/*
|
||||
* cidrecv - converts external binary format to cid |
||||
*/ |
||||
Datum |
||||
cidrecv(PG_FUNCTION_ARGS) |
||||
{ |
||||
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0); |
||||
|
||||
PG_RETURN_COMMANDID((CommandId) pq_getmsgint(buf, sizeof(CommandId))); |
||||
} |
||||
|
||||
/*
|
||||
* cidsend - converts cid to binary format |
||||
*/ |
||||
Datum |
||||
cidsend(PG_FUNCTION_ARGS) |
||||
{ |
||||
CommandId arg1 = PG_GETARG_COMMANDID(0); |
||||
StringInfoData buf; |
||||
|
||||
pq_begintypsend(&buf); |
||||
pq_sendint(&buf, arg1, sizeof(arg1)); |
||||
PG_RETURN_BYTEA_P(pq_endtypsend(&buf)); |
||||
} |
||||
|
||||
Datum |
||||
cideq(PG_FUNCTION_ARGS) |
||||
{ |
||||
CommandId arg1 = PG_GETARG_COMMANDID(0); |
||||
CommandId arg2 = PG_GETARG_COMMANDID(1); |
||||
|
||||
PG_RETURN_BOOL(arg1 == arg2); |
||||
} |
||||
Loading…
Reference in new issue