$NetBSD: pthread_curcpu_np.3,v 1.2 2011/11/10 16:44:47 wiz Exp $
Copyright (c)2011 YAMAMOTO Takashi,
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
------------------------------------------------------------
.Dd November 10, 2011 .Dt PTHREAD_CURCPU_NP 3 .Os ------------------------------------------------------------
.Sh NAME .Nm pthread_curcpu_np .Nd get current CPU identifier ------------------------------------------------------------
.Sh SYNOPSIS n pthread.h - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
.Ft unsigned int .Fn pthread_curcpu_np \ "void" ------------------------------------------------------------
.Sh DESCRIPTION The .Fn pthread_curcpu_np function provides a way for a thread to know which CPU it's currently running on.
Copyright (c)2011 YAMAMOTO Takashi,
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
------------------------------------------------------------
.Dd November 10, 2011 .Dt PTHREAD_CURCPU_NP 3 .Os ------------------------------------------------------------
.Sh NAME .Nm pthread_curcpu_np .Nd get current CPU identifier ------------------------------------------------------------
.Sh SYNOPSIS n pthread.h - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
.Ft unsigned int .Fn pthread_curcpu_np \ "void" ------------------------------------------------------------
.Sh DESCRIPTION The .Fn pthread_curcpu_np function provides a way for a thread to know which CPU it's currently running on.
p
Note that, unless the thread is bound to a specific CPU, the result might be
already stale when the function returns.
However, it still can be useful as a hint to achieve better CPU locality.
------------------------------------------------------------
.Sh RETURN VALUES
The
.Fn pthread_curcpu_np
function returns the integer identifier of the CPU which is currently
running the calling thread.
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.Sh COMPATIBILITY
The
.Fn pthread_curcpu_np
function is a non-standard extension.
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.Sh SEE ALSO
.Xr affinity 3 ,
.Xr pthread 3