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Add PQisthreadsafe() to libpq, to allow library applications to query

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the thread-safety status of the library.
This commit is contained in:
Bruce Momjian
2006-05-23 22:13:19 +00:00
parent 7f52e0c50e
commit c1d4551ae1
4 changed files with 42 additions and 6 deletions
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27
doc/src/sgml/libpq.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.210 2006/05/21 20:19:23 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.211 2006/05/23 22:13:19 momjian Exp $ -->
<chapter id="libpq">
<title><application>libpq</application> - C Library</title>
@ -4196,11 +4196,32 @@ options when you compile your application code. Refer to your
system's documentation for information about how to build
thread-enabled applications, or look in
<filename>src/Makefile.global</filename> for <literal>PTHREAD_CFLAGS</>
and <literal>PTHREAD_LIBS</>.
and <literal>PTHREAD_LIBS</>. This function allows the querying of
<application>libpq</application>'s thread-safe status:
</para>
<variablelist>
<varlistentry>
<term><function>PQisthreadsafe</function><indexterm><primary>PQisthreadsafe</></></term>
<listitem>
<para>
Returns the thread safety status of the <application>libpq</application>
library.
<synopsis>
int PQisthreadsafe();
</synopsis>
</para>
<para>
One restriction is that no two threads attempt to manipulate the same
Returns 1 if the <application>libpq</application> is thead-safe and
0 if it is not.
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
One thread restriction is that no two threads attempt to manipulate the same
<structname>PGconn</> object at the same time. In particular, you cannot
issue concurrent commands from different threads through the same
connection object. (If you need to run concurrent commands, use