<!-- manual page source format generated by PolyglotMan v3.2, --> <!-- available at http://polyglotman.sourceforge.net/ --> <html> <head> <title>IM_CONCURRENCY(3) manual page</title> </head> <body bgcolor='white'> <a href='#toc'>Table of Contents</a><p> <h2><a name='sect0' href='#toc0'>Name</a></h2> im_concurrency_set, im_concurrency_get - set and get the number of threads to use for evaluation <h2><a name='sect1' href='#toc1'>Synopsis</a></h2> <b>#include <vips/vips.h></b> <p> void im_concurrency_set( int concurrency ) <br> int im_concurrency_get( void ) <p> <h2><a name='sect2' href='#toc2'>Description</a></h2> <p> <a href='im_concurrency_set.3.html'><b>im_concurrency_set(3)</a> </b> and <a href='im_concurrency_get.3.html'><b>im_concurrency_get(3)</a> </b> set and get the number of parallel threads VIPS should use to calculate pixels. <p> A value of zero (the default) means to get the number of threads from the environment variable IM_CONCURRENCY. If that is not set, the number of threads defaults to one. <p> Setting the number of threads only affects image evaluations which start after that point, it will not change the behaviour of existing evaluations. <p> Most command-line vips programs support the --vips-concurrency flag, which can also be used to set the concurrency. <p> <h2><a name='sect3' href='#toc3'>See Also</a></h2> <a href='im_get_option_group.3.html'>im_get_option_group(3)</a> , ‘VIPS manual,’ in accompanying documentation. <p> <hr><p> <a name='toc'><b>Table of Contents</b></a><p> <ul> <li><a name='toc0' href='#sect0'>Name</a></li> <li><a name='toc1' href='#sect1'>Synopsis</a></li> <li><a name='toc2' href='#sect2'>Description</a></li> <li><a name='toc3' href='#sect3'>See Also</a></li> </ul> </body> </html>