easylogging++: enforce recursive mutex
This fixes a hang when logging something which causes some other logging code to be called
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@ -1001,7 +1001,11 @@ namespace el {
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public:
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Mutex(void) {
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# if ELPP_OS_UNIX
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pthread_mutex_init(&m_underlyingMutex, nullptr);
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pthread_mutexattr_t attr;
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pthread_mutexattr_init(&attr);
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
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pthread_mutex_init(&m_underlyingMutex, &attr);
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pthread_mutexattr_destroy(&attr);
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# elif ELPP_OS_WINDOWS
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InitializeCriticalSection(&m_underlyingMutex);
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# endif // ELPP_OS_UNIX
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