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<meta name="keywords" content="threads, BTL, thread library, C++">
<title>Boost.Threads, Configuration Information</title>
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<h3><img src="../../../c++boost.gif" alt="C++ Boost" width=
"277" height="86"></h3>
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<td valign="top">
<h1 align="center">Boost.Threads</h1>
<h2 align="center">Configuration Information</h2>
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<hr>
<p><b>Boost.Threads</b> uses several configuration macros in <a href=
"../../config/config.htm"><boost/config.hpp></a>. These macros
are documented here. Most of the macros are of interest only to
developers attempting to provide new implementations of <b>
Boost.Threads</b>. The one exception to this is BOOST_HAS_THREADS.</p>
<table summary="macros" cellspacing="10" width="100%">
<tr>
<td valign="top"><b>Macro</b> </td>
<td valign="top"><b>Meaning</b> </td>
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<tr>
<td valign="top">BOOST_HAS_THREADS</td>
<td valign="top">Indicates that threading support is available.
This means both that there is a platform specific
implementation for <b>Boost.Threads</b> and that threading
support has been enabled in a platform specific manner. For
instance, on the Win32 platform there's an implementation
for <b>Boost.Threads</b> but unless the program is compiled
against one of the multi-threading runtimes (often determined
by the compiler predefining the macro _MT) the
BOOST_HAS_THREADS macro remains undefined.</td>
</tr>
<tr>
<td valign="top">BOOST_HAS_WINTHREADS</td>
<td valign="top">Indicates that the platform has the Microsoft
Win32 threading libraries, and that they should be used to
implement <b>Boost.Threads</b>.</td>
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<tr>
<td valign="top">BOOST_HAS_PTHREADS</td>
<td valign="top">Indicates that the platform has the POSIX
pthreads libraries, and that they should be used to implement
<b>Boost.Threads</b>.</td>
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<td valign="top">BOOST_HAS_FTIME</td>
<td valign="top">Indicates that the implementation should use
GetSystemTimeAsFileTime() and the FILETIME type to calculate
the current time. This is an implementation detail used by
boost::detail::getcurtime().</td>
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<tr>
<td valign="top">BOOST_HAS_GETTTIMEOFDAY</td>
<td valign="top">Indicates that the implementation should use
gettimeofday() to calculate the current time. This is an
implementation detail used by boost::detail::getcurtime().</td>
</tr>
</table>
<hr>
<p>Revised
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->05 November, 2001<!--webbot bot="Timestamp" endspan i-checksum="39359" --></p>
<p><i>© Copyright <a href="mailto:williamkempf@hotmail.com">
William E. Kempf</a> 2001 all rights reserved.</i></p>
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