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avoid excessive calls to getifaddrs

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Signed-off-by: Duc Canh Le <duccanh.le@ahrefs.com>
This commit is contained in:
Duc Canh Le 2023-09-20 06:55:39 +00:00
parent b2821106fd
commit 074ee40e3b
1 changed files with 27 additions and 2 deletions
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29
src/Common/isLocalAddress.cpp
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@ -2,6 +2,9 @@
#include <ifaddrs.h>
#include <cstring>
#include <memory>
#include <mutex>
#include <shared_mutex>
#include <optional>
#include <base/types.h>
#include <Common/Exception.h>
@ -74,6 +77,29 @@ struct NetworkInterfaces
{
freeifaddrs(ifaddr);
}
static NetworkInterfaces & instance()
{
static constexpr int NET_INTERFACE_VALID_PERIOD_SECONDS = 30;
static std::unique_ptr<NetworkInterfaces> nf = std::make_unique<NetworkInterfaces>();
static time_t last_updated_time = time(nullptr);
static std::shared_mutex nf_mtx;
time_t now = time(nullptr);
if (now - last_updated_time > NET_INTERFACE_VALID_PERIOD_SECONDS)
{
std::unique_lock lock(nf_mtx);
nf = std::make_unique<NetworkInterfaces>();
last_updated_time = now;
return *nf;
}
else
{
std::shared_lock lock(nf_mtx);
return *nf;
}
}
};
}
@ -111,8 +137,7 @@ bool isLocalAddress(const Poco::Net::IPAddress & address)
}
}
NetworkInterfaces interfaces;
return interfaces.hasAddress(address);
return NetworkInterfaces::instance().hasAddress(address);
}