Singleton Creation the Thread-safe Way
By Jonathan Ringle, October 01, 1999
Singletons avoid problems with order of construction, at the cost of more problems for multithreading.
October 1999/Singleton Creation the Thread-safe Way/Listing 4
// sync.h
class Critical_Section
{
public:
Critical_Section() { InitializeCriticalSection(&mutex); }
~Critical_Section() { DeleteCriticalSection(&mutex); }
void acquire() { EnterCriticalSection(&mutex); }
void release() { LeaveCriticalSection(&mutex); }
private:
CRITICAL_SECTION mutex;
};
template<class Key> class Lock_Guard
{
public:
Lock_Guard(Key& a_key) : _key(a_key) { lock(); }
~Lock_Guard() { unlock(); }
void lock() { _key.acquire(); }
void unlock() { _key.release(); }
private:
Key& _key;
};
