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Date: Thu, 25 Oct 2007 14:15:45 -0700 (PDT)
From: andrew klassen <aptklassen@yahoo.com>
Subject: is libpq thread safe without configure enable_thread_safety=yes 
To: pgsql-interfaces@postgresql.org
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I want to use the libpq in a multithreaded process. I intend to use two 
  different connections for two different threads. The requests and results 
  for each connection will be handled completely by each thread independently. 
  I tried to set enable_thread_safety and enable_thread_safety_force to yes.
  However, the compile fails because of references to pthread routines which are not
  supported by my os. Specifically:
   
  ../../../src/interfaces/libpq/libpq.so: undefined reference to `pthread_sigmask'
../../../src/interfaces/libpq/libpq.so: undefined reference to `pthread_mutex_unlock'
../../../src/interfaces/libpq/libpq.so: undefined reference to `pthread_mutex_lock'
../../../src/interfaces/libpq/libpq.so: undefined reference to `sigwait'
   
  I can change the code to fix this, but I wondering if based on my application it is okay
  to just configure without setting enable_thread_safety.
   
  Thanks for any help.
  Andrew
   

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<div>I want to use the libpq in a multithreaded process. I intend to use two </div>  <div>different connections for two different threads. The requests and results </div>  <div>for each connection will be handled completely by each thread independently. </div>  <div>I tried to set enable_thread_safety and enable_thread_safety_force to yes.</div>  <div>However, the compile fails because of references to pthread routines which are not</div>  <div>supported by my os. Specifically:</div>  <div>&nbsp;</div>  <div>../../../src/interfaces/libpq/libpq.so: undefined reference to `pthread_sigmask'<BR>../../../src/interfaces/libpq/libpq.so: undefined reference to `pthread_mutex_unlock'<BR>../../../src/interfaces/libpq/libpq.so: undefined reference to `pthread_mutex_lock'<BR>../../../src/interfaces/libpq/libpq.so: undefined reference to `sigwait'</div>  <div>&nbsp;</div>  <div>I can change the code to fix this, but I wondering if based on my application it is okay</div>  <div>to just
 configure without setting enable_thread_safety.</div>  <div>&nbsp;</div>  <div>Thanks for any help.</div>  <div>Andrew</div>  <div>&nbsp;</div><p>&#32;__________________________________________________<br>Do You Yahoo!?<br>Tired of spam?  Yahoo! Mail has the best spam protection around <br>http://mail.yahoo.com 
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