Singleton template class. More...
#include <Singleton.h>
Public Types | |
| typedef ::coil::Mutex | Mutex |
| typedef SingletonClass * | SingletonClassPtr |
Static Public Member Functions | |
| static SingletonClass & | instance () |
| Create instance. More... | |
Protected Member Functions | |
| Singleton () | |
| Constructor. More... | |
| ~Singleton () | |
| Destructor. More... | |
Static Protected Attributes | |
| static SingletonClass * | m_instance |
| SingletonClass object. More... | |
| static coil::Mutex | m_mutex |
| Mutual exclusion object. More... | |
Private Member Functions | |
| Singleton & | operator= (const Singleton &x) |
| Singleton (const Singleton &x) | |
Singleton template class.
This class template makes any classed into Singleton classes. Usage is as follows.
class A { // }; typedef coil::Singleton<A> A_;
In the any places, A& a(A_:instance()); // a has singular instance of A
Since the constructor of A is still public, however, user can create other instance of A as follows.
A* a = new A();
If you want to prohibit user from creating new instance, please inherit Singleton class (CRTP) and declare it as a friend class in the target class.
class A : public coil::Singleton<A> { public: private: A(){}
friend class coil::Singelton<A>; };
A* a = new A(); // compile error A& a(A::instance()); // This is the only method to get unique instance
Definition at line 106 of file Singleton.h.
| typedef ::coil::Mutex coil::Singleton< SingletonClass >::Mutex |
Definition at line 110 of file Singleton.h.
| typedef SingletonClass* coil::Singleton< SingletonClass >::SingletonClassPtr |
Definition at line 109 of file Singleton.h.
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SingletonClass object.
Definition at line 202 of file Singleton.h.
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Mutual exclusion object.
Definition at line 193 of file Singleton.h.