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