Re: [PATCHES] docs done Re: [HACKERS] LIBPQ patches ...

Applied.

> * Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> [000109 08:18] wrote:
> > Don Baccus <dhogaza(at)pacifier(dot)com> writes:
> > > At 05:27 PM 1/8/00 -0500, Tom Lane wrote:
> > >> I also object strongly to the lack of documentation.
> >
> > > ... I know there are some folks who aren't native-english speakers, so
> > > perhaps you don't want to require that the implementor of such patches
> > > provide the final documentation wording. But the information should
> > > be there and spelled out in a form that can be very easily moved to
> > > the docs.
> >
> > Oh, absolutely. Thomas, our master of the docs, has always had the
> > policy of "give me some words, I'll take care of formatting and
> > editing..."
> >
> > I was probably too harsh on Alfred last night, since in fact his code
> > was fairly well commented, and some minimal doco could have been
> > extracted from the routine headers. But on a change like this, I think
> > some paragraphs of coherent high-level explanation are needed: what it
> > does, when and why you'd use it. I didn't see that anywhere...
>
> Here's the revised patch, it includes sgml docs and changes to
> ensure that old style connections behave the way they are expected
> to:
>
> Index: doc/src/sgml/libpq.sgml
> ===================================================================
> RCS file: /home/pgcvs/pgsql/doc/src/sgml/libpq.sgml,v
> retrieving revision 1.25
> diff -u -c -r1.25 libpq.sgml
> *** doc/src/sgml/libpq.sgml 2000/01/14 05:33:13 1.25
> --- doc/src/sgml/libpq.sgml 2000/01/17 03:40:30
> ***************
> *** 377,382 ****
> --- 377,386 ----
> changed in the future.
> </para>
> <para>
> + These functions leave the socket in a non-blocking state as if
> + <function>PQsetnonblocking</function> had been called.
> + </para>
> + <para>
> These functions are not thread-safe.
> </para>
> </listitem>
> ***************
> *** 1168,1175 ****
> --- 1172,1229 ----
> Applications that do not like these limitations can instead use the
> underlying functions that <function>PQexec</function> is built from:
> <function>PQsendQuery</function> and <function>PQgetResult</function>.
> + </para>
> + <para>
> + Older programs that used this functionality as well as
> + <function>PQputline</function> and <function>PQputnbytes</function>
> + could block waiting to send data to the backend, to
> + address that issue, the function <function>PQsetnonblocking</function>
> + was added.
> + </para>
> + <para>
> + Old applications can neglect to use <function>PQsetnonblocking</function>
> + and get the older potentially blocking behavior. Newer programs can use
> + <function>PQsetnonblocking</function> to achieve a completely non-blocking
> + connection to the backend.
>
> <itemizedlist>
> + <listitem>
> + <para>
> + <function>PQsetnonblocking</function> Sets the state of the connection
> + to non-blocking.
> + <synopsis>
> + int PQsetnonblocking(PGconn *conn)
> + </synopsis>
> + this function will ensure that calls to
> + <function>PQputline</function>, <function>PQputnbytes</function>,
> + <function>PQsendQuery</function> and <function>PQendcopy</function>
> + will not block but instead return an error if they need to be called
> + again.
> + </para>
> + <para>
> + When a database connection has been set to non-blocking mode and
> + <function>PQexec</function> is called, it will temporarily set the state
> + of the connection to blocking until the <function>PQexec</function>
> + completes.
> + </para>
> + <para>
> + More of libpq is expected to be made safe for
> + <function>PQsetnonblocking</function> functionality in the near future.
> + </para>
> + </listitem>
> +
> + <listitem>
> + <para>
> + <function>PQisnonblocking</function>
> + Returns the blocking status of the database connection.
> + <synopsis>
> + int PQisnonblocking(const PGconn *conn)
> + </synopsis>
> + Returns TRUE if the connection is set to non-blocking mode,
> + FALSE if blocking.
> + </para>
> + </listitem>
> +
> <listitem>
> <para>
> <function>PQsendQuery</function>
> ***************
> *** 1267,1286 ****
>
> <listitem>
> <para>
> <function>PQsocket</function>
> Obtain the file descriptor number for the backend connection socket.
> ! A valid descriptor will be >= 0; a result of -1 indicates that
> no backend connection is currently open.
> <synopsis>
> int PQsocket(const PGconn *conn);
> </synopsis>
> <function>PQsocket</function> should be used to obtain the backend socket descriptor
> in preparation for executing <function>select</function>(2). This allows an
> ! application to wait for either backend responses or other conditions.
> If the result of <function>select</function>(2) indicates that data can be read from
> the backend socket, then <function>PQconsumeInput</function> should be called to read the
> data; after which, <function>PQisBusy</function>, <function>PQgetResult</function>,
> and/or <function>PQnotifies</function> can be used to process the response.
> </para>
> </listitem>
>
> --- 1321,1363 ----
>
> <listitem>
> <para>
> + <function>PQflush</function> Attempt to flush any data queued to the backend,
> + returns 0 if successful (or if the send queue is empty) or EOF if it failed for
> + some reason.
> + <synopsis>
> + int PQflush(PGconn *conn);
> + </synopsis>
> + <function>PQflush</function> needs to be called on a non-blocking connection
> + before calling <function>select</function> to determine if a responce has
> + arrived. If 0 is returned it ensures that there is no data queued to the
> + backend that has not actually been sent. Only applications that have used
> + <function>PQsetnonblocking</function> have a need for this.
> + </para>
> + </listitem>
> +
> + <listitem>
> + <para>
> <function>PQsocket</function>
> Obtain the file descriptor number for the backend connection socket.
> ! A valid descriptor will be &gt;= 0; a result of -1 indicates that
> no backend connection is currently open.
> <synopsis>
> int PQsocket(const PGconn *conn);
> </synopsis>
> <function>PQsocket</function> should be used to obtain the backend socket descriptor
> in preparation for executing <function>select</function>(2). This allows an
> ! application using a blocking connection to wait for either backend responses or
> ! other conditions.
> If the result of <function>select</function>(2) indicates that data can be read from
> the backend socket, then <function>PQconsumeInput</function> should be called to read the
> data; after which, <function>PQisBusy</function>, <function>PQgetResult</function>,
> and/or <function>PQnotifies</function> can be used to process the response.
> + </para>
> + <para>
> + Non-blocking connections (that have used <function>PQsetnonblocking</function>)
> + should not use <function>select</function> until <function>PQflush</function>
> + has returned 0 indicating that there is no buffered data waiting to be sent
> + to the backend.
> </para>
> </listitem>
>
> Index: src/interfaces/libpq/fe-connect.c
> ===================================================================
> RCS file: /home/pgcvs/pgsql/src/interfaces/libpq/fe-connect.c,v
> retrieving revision 1.111
> diff -u -c -r1.111 fe-connect.c
> *** src/interfaces/libpq/fe-connect.c 2000/01/16 21:18:52 1.111
> --- src/interfaces/libpq/fe-connect.c 2000/01/17 02:35:56
> ***************
> *** 594,624 ****
> return 0;
> }
>
> -
> - /* ----------
> - * connectMakeNonblocking -
> - * Make a connection non-blocking.
> - * Returns 1 if successful, 0 if not.
> - * ----------
> - */
> - static int
> - connectMakeNonblocking(PGconn *conn)
> - {
> - #ifndef WIN32
> - if (fcntl(conn->sock, F_SETFL, O_NONBLOCK) < 0)
> - #else
> - if (ioctlsocket(conn->sock, FIONBIO, &on) != 0)
> - #endif
> - {
> - printfPQExpBuffer(&conn->errorMessage,
> - "connectMakeNonblocking -- fcntl() failed: errno=%d\n%s\n",
> - errno, strerror(errno));
> - return 0;
> - }
> -
> - return 1;
> - }
> -
> /* ----------
> * connectNoDelay -
> * Sets the TCP_NODELAY socket option.
> --- 594,599 ----
> ***************
> *** 789,795 ****
> * Ewan Mellor <eem21(at)cam(dot)ac(dot)uk>.
> * ---------- */
> #if (!defined(WIN32) || defined(WIN32_NON_BLOCKING_CONNECTIONS)) && !defined(USE_SSL)
> ! if (!connectMakeNonblocking(conn))
> goto connect_errReturn;
> #endif
>
> --- 764,770 ----
> * Ewan Mellor <eem21(at)cam(dot)ac(dot)uk>.
> * ---------- */
> #if (!defined(WIN32) || defined(WIN32_NON_BLOCKING_CONNECTIONS)) && !defined(USE_SSL)
> ! if (PQsetnonblocking(conn, TRUE) != 0)
> goto connect_errReturn;
> #endif
>
> ***************
> *** 898,904 ****
> /* This makes the connection non-blocking, for all those cases which forced us
> not to do it above. */
> #if (defined(WIN32) && !defined(WIN32_NON_BLOCKING_CONNECTIONS)) || defined(USE_SSL)
> ! if (!connectMakeNonblocking(conn))
> goto connect_errReturn;
> #endif
>
> --- 873,879 ----
> /* This makes the connection non-blocking, for all those cases which forced us
> not to do it above. */
> #if (defined(WIN32) && !defined(WIN32_NON_BLOCKING_CONNECTIONS)) || defined(USE_SSL)
> ! if (PQsetnonblocking(conn, TRUE) != 0)
> goto connect_errReturn;
> #endif
>
> ***************
> *** 1720,1725 ****
> --- 1695,1701 ----
> conn->inBuffer = (char *) malloc(conn->inBufSize);
> conn->outBufSize = 8 * 1024;
> conn->outBuffer = (char *) malloc(conn->outBufSize);
> + conn->nonblocking = FALSE;
> initPQExpBuffer(&conn->errorMessage);
> initPQExpBuffer(&conn->workBuffer);
> if (conn->inBuffer == NULL ||
> ***************
> *** 1830,1835 ****
> --- 1806,1812 ----
> conn->lobjfuncs = NULL;
> conn->inStart = conn->inCursor = conn->inEnd = 0;
> conn->outCount = 0;
> + conn->nonblocking = FALSE;
>
> }
>
> Index: src/interfaces/libpq/fe-exec.c
> ===================================================================
> RCS file: /home/pgcvs/pgsql/src/interfaces/libpq/fe-exec.c,v
> retrieving revision 1.86
> diff -u -c -r1.86 fe-exec.c
> *** src/interfaces/libpq/fe-exec.c 1999/11/11 00:10:14 1.86
> --- src/interfaces/libpq/fe-exec.c 2000/01/14 22:47:07
> ***************
> *** 13,18 ****
> --- 13,19 ----
> */
> #include <errno.h>
> #include <ctype.h>
> + #include <fcntl.h>
>
> #include "postgres.h"
> #include "libpq-fe.h"
> ***************
> *** 24,30 ****
> #include <unistd.h>
> #endif
>
> -
> /* keep this in same order as ExecStatusType in libpq-fe.h */
> const char *const pgresStatus[] = {
> "PGRES_EMPTY_QUERY",
> --- 25,30 ----
> ***************
> *** 514,526 ****
> conn->curTuple = NULL;
>
> /* send the query to the backend; */
> ! /* the frontend-backend protocol uses 'Q' to designate queries */
> ! if (pqPutnchar("Q", 1, conn) ||
> ! pqPuts(query, conn) ||
> ! pqFlush(conn))
> {
> ! handleSendFailure(conn);
> ! return 0;
> }
>
> /* OK, it's launched! */
> --- 514,566 ----
> conn->curTuple = NULL;
>
> /* send the query to the backend; */
> !
> ! /*
> ! * in order to guarantee that we don't send a partial query
> ! * where we would become out of sync with the backend and/or
> ! * block during a non-blocking connection we must first flush
> ! * the send buffer before sending more data
> ! *
> ! * an alternative is to implement 'queue reservations' where
> ! * we are able to roll up a transaction
> ! * (the 'Q' along with our query) and make sure we have
> ! * enough space for it all in the send buffer.
> ! */
> ! if (pqIsnonblocking(conn))
> {
> ! /*
> ! * the buffer must have emptied completely before we allow
> ! * a new query to be buffered
> ! */
> ! if (pqFlush(conn))
> ! return 0;
> ! /* 'Q' == queries */
> ! /* XXX: if we fail here we really ought to not block */
> ! if (pqPutnchar("Q", 1, conn) ||
> ! pqPuts(query, conn))
> ! {
> ! handleSendFailure(conn);
> ! return 0;
> ! }
> ! /*
> ! * give the data a push, ignore the return value as
> ! * ConsumeInput() will do any aditional flushing if needed
> ! */
> ! (void) pqFlush(conn);
> ! }
> ! else
> ! {
> ! /*
> ! * the frontend-backend protocol uses 'Q' to
> ! * designate queries
> ! */
> ! if (pqPutnchar("Q", 1, conn) ||
> ! pqPuts(query, conn) ||
> ! pqFlush(conn))
> ! {
> ! handleSendFailure(conn);
> ! return 0;
> ! }
> }
>
> /* OK, it's launched! */
> ***************
> *** 574,580 ****
> --- 614,630 ----
> * we will NOT block waiting for more input.
> */
> if (pqReadData(conn) < 0)
> + {
> + /*
> + * for non-blocking connections
> + * try to flush the send-queue otherwise we may never get a
> + * responce for something that may not have already been sent
> + * because it's in our write buffer!
> + */
> + if (pqIsnonblocking(conn))
> + (void) pqFlush(conn);
> return 0;
> + }
> /* Parsing of the data waits till later. */
> return 1;
> }
> ***************
> *** 1088,1093 ****
> --- 1138,1153 ----
> {
> PGresult *result;
> PGresult *lastResult;
> + bool savedblocking;
> +
> + /*
> + * we assume anyone calling PQexec wants blocking behaviour,
> + * we force the blocking status of the connection to blocking
> + * for the duration of this function and restore it on return
> + */
> + savedblocking = pqIsnonblocking(conn);
> + if (PQsetnonblocking(conn, FALSE) == -1)
> + return NULL;
>
> /*
> * Silently discard any prior query result that application didn't
> ***************
> *** 1102,1115 ****
> PQclear(result);
> printfPQExpBuffer(&conn->errorMessage,
> "PQexec: you gotta get out of a COPY state yourself.\n");
> ! return NULL;
> }
> PQclear(result);
> }
>
> /* OK to send the message */
> if (!PQsendQuery(conn, query))
> ! return NULL;
>
> /*
> * For backwards compatibility, return the last result if there are
> --- 1162,1176 ----
> PQclear(result);
> printfPQExpBuffer(&conn->errorMessage,
> "PQexec: you gotta get out of a COPY state yourself.\n");
> ! /* restore blocking status */
> ! goto errout;
> }
> PQclear(result);
> }
>
> /* OK to send the message */
> if (!PQsendQuery(conn, query))
> ! goto errout; /* restore blocking status */
>
> /*
> * For backwards compatibility, return the last result if there are
> ***************
> *** 1142,1148 ****
> --- 1203,1217 ----
> result->resultStatus == PGRES_COPY_OUT)
> break;
> }
> +
> + if (PQsetnonblocking(conn, savedblocking) == -1)
> + return NULL;
> return lastResult;
> +
> + errout:
> + if (PQsetnonblocking(conn, savedblocking) == -1)
> + return NULL;
> + return NULL;
> }
>
>
> ***************
> *** 1431,1438 ****
> "PQendcopy() -- I don't think there's a copy in progress.\n");
> return 1;
> }
>
> ! (void) pqFlush(conn); /* make sure no data is waiting to be sent */
>
> /* Return to active duty */
> conn->asyncStatus = PGASYNC_BUSY;
> --- 1500,1516 ----
> "PQendcopy() -- I don't think there's a copy in progress.\n");
> return 1;
> }
> +
> + /*
> + * make sure no data is waiting to be sent,
> + * abort if we are non-blocking and the flush fails
> + */
> + if (pqFlush(conn) && pqIsnonblocking(conn))
> + return (1);
>
> ! /* non blocking connections may have to abort at this point. */
> ! if (pqIsnonblocking(conn) && PQisBusy(conn))
> ! return (1);
>
> /* Return to active duty */
> conn->asyncStatus = PGASYNC_BUSY;
> ***************
> *** 2025,2028 ****
> --- 2103,2192 ----
> return 1;
> else
> return 0;
> + }
> +
> + /* PQsetnonblocking:
> + sets the PGconn's database connection non-blocking if the arg is TRUE
> + or makes it non-blocking if the arg is FALSE, this will not protect
> + you from PQexec(), you'll only be safe when using the non-blocking
> + API
> + Needs to be called only on a connected database connection.
> + */
> +
> + int
> + PQsetnonblocking(PGconn *conn, int arg)
> + {
> + int fcntlarg;
> +
> + arg = (arg == TRUE) ? 1 : 0;
> + /* early out if the socket is already in the state requested */
> + if (arg == conn->nonblocking)
> + return (0);
> +
> + /*
> + * to guarantee constancy for flushing/query/result-polling behavior
> + * we need to flush the send queue at this point in order to guarantee
> + * proper behavior.
> + * this is ok because either they are making a transition
> + * _from_ or _to_ blocking mode, either way we can block them.
> + */
> + /* if we are going from blocking to non-blocking flush here */
> + if (!pqIsnonblocking(conn) && pqFlush(conn))
> + return (-1);
> +
> +
> + #ifdef USE_SSL
> + if (conn->ssl)
> + {
> + printfPQExpBuffer(&conn->errorMessage,
> + "PQsetnonblocking() -- not supported when using SSL\n");
> + return (-1);
> + }
> + #endif /* USE_SSL */
> +
> + #ifndef WIN32
> + fcntlarg = fcntl(conn->sock, F_GETFL, 0);
> + if (fcntlarg == -1)
> + return (-1);
> +
> + if ((arg == TRUE &&
> + fcntl(conn->sock, F_SETFL, fcntlarg | O_NONBLOCK) == -1) ||
> + (arg == FALSE &&
> + fcntl(conn->sock, F_SETFL, fcntlarg & ~O_NONBLOCK) == -1))
> + #else
> + fcntlarg = arg;
> + if (ioctlsocket(conn->sock, FIONBIO, &fcntlarg) != 0)
> + #endif
> + {
> + printfPQExpBuffer(&conn->errorMessage,
> + "PQsetblocking() -- unable to set nonblocking status to %s\n",
> + arg == TRUE ? "TRUE" : "FALSE");
> + return (-1);
> + }
> +
> + conn->nonblocking = arg;
> +
> + /* if we are going from non-blocking to blocking flush here */
> + if (pqIsnonblocking(conn) && pqFlush(conn))
> + return (-1);
> +
> + return (0);
> + }
> +
> + /* return the blocking status of the database connection, TRUE == nonblocking,
> + FALSE == blocking
> + */
> + int
> + PQisnonblocking(const PGconn *conn)
> + {
> +
> + return (pqIsnonblocking(conn));
> + }
> +
> + /* try to force data out, really only useful for non-blocking users */
> + int
> + PQflush(PGconn *conn)
> + {
> +
> + return (pqFlush(conn));
> }
> Index: src/interfaces/libpq/fe-misc.c
> ===================================================================
> RCS file: /home/pgcvs/pgsql/src/interfaces/libpq/fe-misc.c,v
> retrieving revision 1.33
> diff -u -c -r1.33 fe-misc.c
> *** src/interfaces/libpq/fe-misc.c 1999/11/30 03:08:19 1.33
> --- src/interfaces/libpq/fe-misc.c 2000/01/12 03:12:14
> ***************
> *** 86,91 ****
> --- 86,122 ----
> {
> size_t avail = Max(conn->outBufSize - conn->outCount, 0);
>
> + /*
> + * if we are non-blocking and the send queue is too full to buffer this
> + * request then try to flush some and return an error
> + */
> + if (pqIsnonblocking(conn) && nbytes > avail && pqFlush(conn))
> + {
> + /*
> + * even if the flush failed we may still have written some
> + * data, recalculate the size of the send-queue relative
> + * to the amount we have to send, we may be able to queue it
> + * afterall even though it's not sent to the database it's
> + * ok, any routines that check the data coming from the
> + * database better call pqFlush() anyway.
> + */
> + if (nbytes > Max(conn->outBufSize - conn->outCount, 0))
> + {
> + printfPQExpBuffer(&conn->errorMessage,
> + "pqPutBytes -- pqFlush couldn't flush enough"
> + " data: space available: %d, space needed %d\n",
> + Max(conn->outBufSize - conn->outCount, 0), nbytes);
> + return EOF;
> + }
> + }
> +
> + /*
> + * is the amount of data to be sent is larger than the size of the
> + * output buffer then we must flush it to make more room.
> + *
> + * the code above will make sure the loop conditional is never
> + * true for non-blocking connections
> + */
> while (nbytes > avail)
> {
> memcpy(conn->outBuffer + conn->outCount, s, avail);
> ***************
> *** 548,553 ****
> --- 579,592 ----
> return EOF;
> }
>
> + /*
> + * don't try to send zero data, allows us to use this function
> + * without too much worry about overhead
> + */
> + if (len == 0)
> + return (0);
> +
> + /* while there's still data to send */
> while (len > 0)
> {
> /* Prevent being SIGPIPEd if backend has closed the connection. */
> ***************
> *** 556,561 ****
> --- 595,601 ----
> #endif
>
> int sent;
> +
> #ifdef USE_SSL
> if (conn->ssl)
> sent = SSL_write(conn->ssl, ptr, len);
> ***************
> *** 585,590 ****
> --- 625,632 ----
> case EWOULDBLOCK:
> break;
> #endif
> + case EINTR:
> + continue;
>
> case EPIPE:
> #ifdef ECONNRESET
> ***************
> *** 616,628 ****
> ptr += sent;
> len -= sent;
> }
> if (len > 0)
> {
> /* We didn't send it all, wait till we can send more */
>
> - /* At first glance this looks as though it should block. I think
> - * that it will be OK though, as long as the socket is
> - * non-blocking. */
> if (pqWait(FALSE, TRUE, conn))
> return EOF;
> }
> --- 658,688 ----
> ptr += sent;
> len -= sent;
> }
> +
> if (len > 0)
> {
> /* We didn't send it all, wait till we can send more */
> +
> + /*
> + * if the socket is in non-blocking mode we may need
> + * to abort here
> + */
> + #ifdef USE_SSL
> + /* can't do anything for our SSL users yet */
> + if (conn->ssl == NULL)
> + {
> + #endif
> + if (pqIsnonblocking(conn))
> + {
> + /* shift the contents of the buffer */
> + memmove(conn->outBuffer, ptr, len);
> + conn->outCount = len;
> + return EOF;
> + }
> + #ifdef USE_SSL
> + }
> + #endif
>
> if (pqWait(FALSE, TRUE, conn))
> return EOF;
> }
> Index: src/interfaces/libpq/libpq-fe.h
> ===================================================================
> RCS file: /home/pgcvs/pgsql/src/interfaces/libpq/libpq-fe.h,v
> retrieving revision 1.55
> diff -u -c -r1.55 libpq-fe.h
> *** src/interfaces/libpq/libpq-fe.h 2000/01/15 05:37:21 1.55
> --- src/interfaces/libpq/libpq-fe.h 2000/01/17 02:35:56
> ***************
> *** 263,268 ****
> --- 263,275 ----
> extern int PQputnbytes(PGconn *conn, const char *buffer, int nbytes);
> extern int PQendcopy(PGconn *conn);
>
> + /* Set blocking/nonblocking connection to the backend */
> + extern int PQsetnonblocking(PGconn *conn, int arg);
> + extern int PQisnonblocking(const PGconn *conn);
> +
> + /* Force the write buffer to be written (or at least try) */
> + extern int PQflush(PGconn *conn);
> +
> /*
> * "Fast path" interface --- not really recommended for application
> * use
> Index: src/interfaces/libpq/libpq-int.h
> ===================================================================
> RCS file: /home/pgcvs/pgsql/src/interfaces/libpq/libpq-int.h,v
> retrieving revision 1.16
> diff -u -c -r1.16 libpq-int.h
> *** src/interfaces/libpq/libpq-int.h 2000/01/15 05:37:21 1.16
> --- src/interfaces/libpq/libpq-int.h 2000/01/17 02:35:56
> ***************
> *** 214,219 ****
> --- 214,222 ----
> int inEnd; /* offset to first position after avail
> * data */
>
> + int nonblocking; /* whether this connection is using a blocking
> + * socket to the backend or not */
> +
> /* Buffer for data not yet sent to backend */
> char *outBuffer; /* currently allocated buffer */
> int outBufSize; /* allocated size of buffer */
> ***************
> *** 299,303 ****
> --- 302,312 ----
> #define strerror(A) (sys_errlist[(A)])
> #endif /* sunos4 */
> #endif /* !strerror */
> +
> + /*
> + * this is so that we can check is a connection is non-blocking internally
> + * without the overhead of a function call
> + */
> + #define pqIsnonblocking(conn) (conn->nonblocking)
>
> #endif /* LIBPQ_INT_H */
>
>
> ************
>

--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026