fixed GH #500: SSLManager causes a crash (use AtomicCounter, remove static Mutex)

Crypto/include/Poco/Crypto/OpenSSLInitializer.h

@@ -22,6 +22,7 @@
 
 #include "Poco/Crypto/Crypto.h"
 #include "Poco/Mutex.h"
+#include "Poco/AtomicCounter.h"
 #include <openssl/crypto.h>
 #include <openssl/opensslv.h>
 #if defined(OPENSSL_FIPS) && OPENSSL_VERSION_NUMBER < 0x010001000L
@@ -82,8 +83,7 @@ protected:
 
 private:
 	static Poco::FastMutex* _mutexes;
-	static Poco::FastMutex _mutex;
+	static Poco::AtomicCounter _rc;
-	static int _rc;
 };
 
 

Crypto/src/OpenSSLInitializer.cpp

@@ -35,8 +35,7 @@ namespace Crypto {
 
 
 Poco::FastMutex* OpenSSLInitializer::_mutexes(0);
-Poco::FastMutex OpenSSLInitializer::_mutex;
+Poco::AtomicCounter OpenSSLInitializer::_rc;
-int OpenSSLInitializer::_rc(0);
 
 
 OpenSSLInitializer::OpenSSLInitializer()
@@ -60,8 +59,6 @@ OpenSSLInitializer::~OpenSSLInitializer()
 
 void OpenSSLInitializer::initialize()
 {
-	Poco::FastMutex::ScopedLock lock(_mutex);
-	
 	if (++_rc == 1)
 	{
 #if OPENSSL_VERSION_NUMBER >= 0x0907000L
@@ -98,8 +95,6 @@ void OpenSSLInitializer::initialize()
 
 void OpenSSLInitializer::uninitialize()
 {
-	Poco::FastMutex::ScopedLock lock(_mutex);
-
 	if (--_rc == 0)
 	{
 		EVP_cleanup();