33 lines
940 B
Groff
33 lines
940 B
Groff
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.TH IM_CONCURRENCY 3 "8 January 2007"
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.SH NAME
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im_concurrency_set, im_concurrency_get \- set and get the number of threads to
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use for evaluation
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.SH SYNOPSIS
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.B #include <vips/vips.h>
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void im_concurrency_set( int concurrency )
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.br
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int im_concurrency_get( void )
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.SH DESCRIPTION
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.B im_concurrency_set(3)
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and
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.B im_concurrency_get(3)
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set and get the number of parallel threads VIPS should use to calculate
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pixels.
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A value of zero (the default) means to get the number of threads
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from the environment variable IM_CONCURRENCY. If that is not set, the number
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of threads defaults to one.
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Setting the number of threads only affects image evaluations which start after
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that point, it will not change the behaviour of existing evaluations.
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Most command-line vips programs support the --vips-concurrency flag, which can
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also be used to set the concurrency.
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.SH SEE ALSO
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im_get_option_group(3),
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`VIPS manual,' in accompanying documentation.
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