Date: Thu, 24 Sep 2015 11:11:27 -0700 From: Jason Schulz <schulz.j@gmail.com> To: freebsd-threads@freebsd.org Subject: pthread_getaffinity_np issue Message-ID: <20150924181127.GC3104@gmail.com>
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I'm having an issue using the non-posix thread affinity methods. Specifically, I'm having trouble using CPU_COUNT. I'm trying to use the following code to get the current number of processors in a processes affinity...
long cs = 0;
#if defined(HAVE_LINUX) || defined(HAVE_FREEBSD)
pthread_t this = pthread_self();
cpu_set_t cpus;
CPU_ZERO(&cpus);
int err = pthread_getaffinity_np(this, sizeof(cpus), &cpus);
if (err)
return err;
cs = (long) CPU_COUNT(&cpus);
However, I get the compiler error...
clang -DHAVE_CONFIG_H -I. -g -O2 -D_THREAD_SAFE -pthread -pipe -std=c99 -D_XOPEN_SOURCE=700 -pedantic -Wall -Wextra -Wsign-conversion -Wconversion -Werror -MT thread.o -MD -MP -MF .deps/thread.Tpo -c -o thread.o thread.c
thread.c:85:15: error: implicit declaration of function '__bitcountl' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
cs = (long) CPU_COUNT(&cpus);
^
/usr/include/sys/cpuset.h:63:24: note: expanded from macro 'CPU_COUNT'
#define CPU_COUNT(p) BIT_COUNT(CPU_SETSIZE, p)
^
/usr/include/sys/bitset.h:185:14: note: expanded from macro 'BIT_COUNT'
__count += __bitcountl((p)->__bits[__i]); \
^
1 error generated.
I'm able to use CPU_ISSET to the same effect, but obviously I'd rather use CPU_COUNT. Suggestions?
-Jason
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