Re: getaddrinfo() for threading instead of gethostbyname()

From: "Nigel J(dot) Andrews" <nandrews(at)investsystems(dot)co(dot)uk>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: getaddrinfo() for threading instead of gethostbyname()
Date: 2003-09-27 21:13:38
Message-ID: Pine.LNX.4.21.0309272208590.8264-100000@ponder.fairway2k.co.uk
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On Sat, 27 Sep 2003, Bruce Momjian wrote:

>
> OK, the thread test program is read for platform testing,
> src/tools/thread_test. You will find the README, Makefile tests, and
> program output to be very clear and almost error-proof.
>
> Please run it on platforms we support and report back. Thanks.

Debian linux
kernel 2.2.x (- which was 2.0 or 2.2 of debian I think, can't remember)
glibc 2.1.3
gcc 2.95.2
it looks like the thread stuff is enabled in ports/linux in cvs tip

hmmmm...

software(at)ponder:~/database/postgres/pgsql/src/tools/thread$ make
gcc -O2 -g -Wall -Wmissing-prototypes -Wmissing-declarations -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -I../../../src/include -D_GNU_SOURCE -c -o thread_test.o thread_test.c
gcc -O2 -g -Wall -Wmissing-prototypes -Wmissing-declarations -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -L../../../src/port -Wl,-rpath,/usr/local/stow/postgresql-7.3.4/lib -lpthread thread_test.o -lpam -lz -lreadline -lcrypt -lresolv -lnsl -ldl -lm -lpgport -o thread_test
software(at)ponder:~/database/postgres/pgsql/src/tools/thread$ ./thread_test
Make sure you have added any needed 'THREAD_CPPFLAGS' and 'THREAD_LIBS'
defines to your template/$port file before compiling this program.

Your gethostbyname() is _not_ thread-safe
Your getpwuid() is _not_ thread-safe
Not all non-*_r functions are thread-safe.
Add this to your template/$port file:

NEED_REENTRANT_FUNCS=yes
software(at)ponder:~/database/postgres/pgsql/src/tools/thread$

Nigel

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