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20 lines
475 B
C++
20 lines
475 B
C++
#include <Common/getMaxFileDescriptorCount.h>
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#include <sys/resource.h>
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std::optional<size_t> getMaxFileDescriptorCount()
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{
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#if defined(OS_LINUX) || defined(OS_DARWIN)
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/// We want to calculate it only once.
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static auto result = []() -> std::optional<size_t>
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{
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rlimit rlim;
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if (0 != getrlimit(RLIMIT_NOFILE, &rlim))
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return std::nullopt;
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return rlim.rlim_max;
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}();
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return result;
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#else
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return std::nullopt;
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#endif
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}
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