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Fix race condition in UniqueId::uniqueId()

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This commit is contained in:
Wenfeng Liu 2018-05-25 09:10:23 +00:00 committed by Felipe Zimmerle
parent b586fa9c1a
commit b85a645610
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2 changed files with 7 additions and 2 deletions
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2
src/unique_id.cc
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@ -55,6 +55,8 @@
namespace modsecurity {
std::once_flag UniqueId::onceFlag;
void UniqueId::fillUniqueId() {
std::string macAddress;
std::string name;

7
src/unique_id.h
View File

@ -15,6 +15,7 @@
#ifdef __cplusplus
#include <string>
#include <mutex>
#endif
#ifndef SRC_UNIQUE_ID_H_
@ -37,9 +38,9 @@ class UniqueId {
}
static std::string uniqueId() {
if (UniqueId::getInstance().uniqueId_str.empty()) {
std::call_once(UniqueId::onceFlag,[]() {
UniqueId::getInstance().fillUniqueId();
}
});
return UniqueId::getInstance().uniqueId_str;
}
@ -59,6 +60,8 @@ class UniqueId {
// C++ 11
// UniqueId(UniqueId const&) = delete;
// void operator=(UniqueId const&) = delete;
static std::once_flag onceFlag;
};
} // namespace modsecurity