dns_utils: lock access to the singleton
This avoids races which could result in two objects being created
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@ -38,6 +38,8 @@
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using namespace epee;
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namespace bf = boost::filesystem;
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static std::mutex instance_lock;
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namespace
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{
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@ -326,6 +328,8 @@ std::string DNSResolver::get_dns_format_from_oa_address(const std::string& oa_ad
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DNSResolver& DNSResolver::instance()
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{
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std::lock_guard<std::mutex> lock(instance_lock);
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static DNSResolver* staticInstance = NULL;
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if (staticInstance == NULL)
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{
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