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b776e58c67
refactored sysdep code: - avoid many #if OS_xxx. - remove bsd.cpp, merge its contents with osx - move linux-specific parts of unix/ into linux/ This was SVN commit r5363.
55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
#include "precompiled.h"
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#include "lcpu.h"
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#if OS_LINUX
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#include "valgrind.h"
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#endif
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static int SysconfFromMemType(CpuMemoryIndicators mem_type)
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{
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switch(mem_type)
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{
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case CPU_MEM_TOTAL:
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return _SC_PHYS_PAGES;
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case CPU_MEM_AVAILABLE:
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return _SC_AVPHYS_PAGES;
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}
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UNREACHABLE;
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}
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size_t lcpu_MemorySize(CpuMemoryIndicators mem_type)
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{
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const int sc_name = SysconfFromMemType(mem_type);
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const size_t pageSize = sysconf(_SC_PAGESIZE);
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const size_t memory_size = sysconf(sc_name) * pageSize;
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return memory_size;
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}
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LibError lcpu_CallByEachCPU(CpuCallback cb, void* param)
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{
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long ncpus = sysconf(_SC_NPROCESSORS_CONF);
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// Valgrind reports the number of real CPUs, but only emulates a single CPU.
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// That causes problems when we expect all those CPUs to be distinct, so
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// just pretend there's only one CPU
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if (RUNNING_ON_VALGRIND)
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ncpus = 1;
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cpu_set_t set;
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for (long i = 0; i < ncpus && i < CPU_SETSIZE; ++i)
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{
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CPU_ZERO(&set);
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CPU_SET(i, &set);
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int ret = sched_setaffinity(0, sizeof(set), &set);
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if (ret)
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WARN_RETURN(ERR::FAIL);
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// (The process gets migrated immediately by the setaffinity call)
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cb(param);
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}
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return INFO::OK;
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}
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