diff options
author | Sven Gothel <[email protected]> | 2015-03-28 01:43:35 +0100 |
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committer | Sven Gothel <[email protected]> | 2015-03-28 01:43:35 +0100 |
commit | 4207f9c279e832e3afcb3f5fc6cd8d84cb4cfe4c (patch) | |
tree | cf3671058d55b47ab6cb6f36f369928606137628 /LibOVRKernel/Src/Kernel/OVR_Delegates.h | |
parent | c29cd1a2fbff6282bab956ad61661ac9d48c4e6e (diff) |
Bump OculusVR RIFT SDK to 0.5.0.1vanilla_0.5.0.1
Diffstat (limited to 'LibOVRKernel/Src/Kernel/OVR_Delegates.h')
-rw-r--r-- | LibOVRKernel/Src/Kernel/OVR_Delegates.h | 541 |
1 files changed, 541 insertions, 0 deletions
diff --git a/LibOVRKernel/Src/Kernel/OVR_Delegates.h b/LibOVRKernel/Src/Kernel/OVR_Delegates.h new file mode 100644 index 0000000..88948b4 --- /dev/null +++ b/LibOVRKernel/Src/Kernel/OVR_Delegates.h @@ -0,0 +1,541 @@ +/************************************************************************************ + +Filename : OVR_Delegates.h +Content : C++ Delegates +Created : June 15, 2014 +Authors : Chris Taylor + +Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved. + +Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License"); +you may not use the Oculus VR Rift SDK except in compliance with the License, +which is provided at the time of installation or download, or which +otherwise accompanies this software in either electronic or hard copy form. + +You may obtain a copy of the License at + +http://www.oculusvr.com/licenses/LICENSE-3.2 + +Unless required by applicable law or agreed to in writing, the Oculus VR SDK +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. + +************************************************************************************/ + +/* + Based on The Impossibly Fast C++ Delegates by Sergey Ryazanov from + http://www.codeproject.com/KB/cpp/ImpossiblyFastCppDelegate.aspx (2005) +*/ + +/* + Usage: + + Declare a delegate with a void (int) signature, also known as a + function that returns void and has one parameter that is an int: + typedef Delegate1<void, int> MyDelegate; + MyDelegate d; + + Point the delegate to a member function: + d.SetMember<A, &A::TestFunctionA>(&a); + d = MyDelegate::FromMember<A, &A::TestFunctionA>(&a); + + Point the delegate to a const member function: + d.SetConstMember<C, &C::TestFunctionA>(&c); + d = MyDelegate::FromConstMember<C, &C::TestFunctionA>(&c); + + Point the delegate to a free function: + d.SetFree<&FreeFunctionX>(); + d = MyDelegate::FromFree<&FreeFunctionX>(); + + Invoke the function via the delegate (works for all 3 cases): + d(1000); + + By default the delegates are uninitialized. + To clear an array of delegates quickly just zero the memory. + + This implementation is nicer than FastDelegates in my opinion + because it is simple and easy to read. It is a little slower + for virtual functions, but the size of the delegate is small, + and it will only get better as compilers improve. +*/ + +#ifndef OVR_Delegates_h +#define OVR_Delegates_h + +#include "OVR_Types.h" + +namespace OVR { + + +template <class ret_type> +class Delegate0 +{ + typedef ret_type (*StubPointer)(void *); + typedef Delegate0<ret_type> this_type; + + void *_object; + StubPointer _stub; + + OVR_FORCE_INLINE Delegate0(void *object, StubPointer stub) + { + _object = object; + _stub = stub; + } + + // Stubs + + template <ret_type (*F)()> + static OVR_FORCE_INLINE ret_type FreeStub(void * /*object*/) + { + return (F)(); + } + + template <class T, ret_type (T::*F)()> + static OVR_FORCE_INLINE ret_type MemberStub(void *object) + { + T *p = static_cast<T*>(object); + return (p->*F)(); + } + + template <class T, ret_type (T::*F)() const> + static OVR_FORCE_INLINE ret_type ConstMemberStub(void *object) + { + T *p = static_cast<T*>(object); + return (p->*F)(); + } + +public: + OVR_FORCE_INLINE Delegate0() : _object(0), _stub(0){} + + // Function invocation + + OVR_FORCE_INLINE ret_type operator()() const + { + return (*_stub)(_object); + } + + // Use stub pointer as a validity flag and equality checker + + OVR_FORCE_INLINE bool operator==(const this_type &rhs) const + { + return _object == rhs._object && _stub == rhs._stub; + } + + OVR_FORCE_INLINE bool operator!=(const this_type &rhs) const + { + return _object != rhs._object || _stub != rhs._stub; + } + + OVR_FORCE_INLINE bool IsValid() const + { + return _stub != 0; + } + + OVR_FORCE_INLINE bool operator!() const + { + return _stub == 0; + } + + OVR_FORCE_INLINE void Invalidate() + { + _stub = 0; + } + + // Delegate creation from a function + + template <ret_type (*F)()> + static OVR_FORCE_INLINE this_type FromFree() + { + return this_type(0, &FreeStub<F>); + } + + template <class T, ret_type (T::*F)()> + static OVR_FORCE_INLINE this_type FromMember(T *object) + { + return this_type(object, &MemberStub<T, F>); + } + + template <class T, ret_type (T::*F)() const> + static OVR_FORCE_INLINE this_type FromConstMember(T const *object) + { + return this_type(const_cast<T*>( object ), &ConstMemberStub<T, F>); + } + + // In-place assignment to a different function + + template <ret_type (*F)()> + OVR_FORCE_INLINE void SetFree() + { + *this = FromFree<F>(); + } + + template <class T, ret_type (T::*F)()> + OVR_FORCE_INLINE void SetMember(T *object) + { + *this = FromMember<T, F>(object); + } + + template <class T, ret_type (T::*F)() const> + OVR_FORCE_INLINE void SetConstMember(T const *object) + { + *this = FromConstMember<T, F>(object); + } +}; + + +template <class ret_type, class arg1_type> +class Delegate1 +{ + typedef ret_type (*StubPointer)(void *, arg1_type); + typedef Delegate1<ret_type, arg1_type> this_type; + + void *_object; + StubPointer _stub; + + OVR_FORCE_INLINE Delegate1(void *object, StubPointer stub) + { + _object = object; + _stub = stub; + } + + // Stubs + + template <ret_type (*F)(arg1_type)> + static OVR_FORCE_INLINE ret_type FreeStub(void * /*object*/, arg1_type a1) + { + return (F)(a1); + } + + template <class T, ret_type (T::*F)(arg1_type)> + static OVR_FORCE_INLINE ret_type MemberStub(void *object, arg1_type a1) + { + T *p = static_cast<T*>(object); + return (p->*F)(a1); + } + + template <class T, ret_type (T::*F)(arg1_type) const> + static OVR_FORCE_INLINE ret_type ConstMemberStub(void *object, arg1_type a1) + { + T *p = static_cast<T*>(object); + return (p->*F)(a1); + } + +public: + OVR_FORCE_INLINE Delegate1() : _object(0), _stub(0){} + + // Function invocation + + OVR_FORCE_INLINE ret_type operator()(arg1_type a1) const + { + return (*_stub)(_object, a1); + } + + // Use stub pointer as a validity flag and equality checker + + OVR_FORCE_INLINE bool operator==(const this_type &rhs) const + { + return _object == rhs._object && _stub == rhs._stub; + } + + OVR_FORCE_INLINE bool operator!=(const this_type &rhs) const + { + return _object != rhs._object || _stub != rhs._stub; + } + + OVR_FORCE_INLINE bool IsValid() const + { + return _stub != 0; + } + + OVR_FORCE_INLINE bool operator!() const + { + return _stub == 0; + } + + OVR_FORCE_INLINE void Invalidate() + { + _stub = 0; + } + + // Delegate creation from a function + + template <ret_type (*F)(arg1_type)> + static OVR_FORCE_INLINE this_type FromFree() + { + return this_type(0, &FreeStub<F>); + } + + template <class T, ret_type (T::*F)(arg1_type)> + static OVR_FORCE_INLINE this_type FromMember(T *object) + { + return this_type(object, &MemberStub<T, F>); + } + + template <class T, ret_type (T::*F)(arg1_type) const> + static OVR_FORCE_INLINE this_type FromConstMember(T const *object) + { + return this_type(const_cast<T*>( object ), &ConstMemberStub<T, F>); + } + + // In-place assignment to a different function + + template <ret_type (*F)(arg1_type)> + OVR_FORCE_INLINE void SetFree() + { + *this = FromFree<F>(); + } + + template <class T, ret_type (T::*F)(arg1_type)> + OVR_FORCE_INLINE void SetMember(T *object) + { + *this = FromMember<T, F>(object); + } + + template <class T, ret_type (T::*F)(arg1_type) const> + OVR_FORCE_INLINE void SetConstMember(T const *object) + { + *this = FromConstMember<T, F>(object); + } +}; + + +template <class ret_type, class arg1_type, class arg2_type> +class Delegate2 +{ + typedef ret_type (*StubPointer)(void *, arg1_type, arg2_type); + typedef Delegate2<ret_type, arg1_type, arg2_type> this_type; + + void *_object; + StubPointer _stub; + + OVR_FORCE_INLINE Delegate2(void *object, StubPointer stub) + { + _object = object; + _stub = stub; + } + + // Stubs + + template <ret_type (*F)(arg1_type, arg2_type)> + static OVR_FORCE_INLINE ret_type FreeStub(void * /*object*/, arg1_type a1, arg2_type a2) + { + return (F)(a1, a2); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type)> + static OVR_FORCE_INLINE ret_type MemberStub(void *object, arg1_type a1, arg2_type a2) + { + T *p = static_cast<T*>(object); + return (p->*F)(a1, a2); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type) const> + static OVR_FORCE_INLINE ret_type ConstMemberStub(void *object, arg1_type a1, arg2_type a2) + { + T *p = static_cast<T*>(object); + return (p->*F)(a1, a2); + } + +public: + OVR_FORCE_INLINE Delegate2() : _object(0), _stub(0){} + + // Function invocation + + OVR_FORCE_INLINE ret_type operator()(arg1_type a1, arg2_type a2) const + { + return (*_stub)(_object, a1, a2); + } + + // Use stub pointer as a validity flag and equality checker + + OVR_FORCE_INLINE bool operator==(const this_type &rhs) const + { + return _object == rhs._object && _stub == rhs._stub; + } + + OVR_FORCE_INLINE bool operator!=(const this_type &rhs) const + { + return _object != rhs._object || _stub != rhs._stub; + } + + OVR_FORCE_INLINE bool IsValid() const + { + return _stub != 0; + } + + OVR_FORCE_INLINE bool operator!() const + { + return _stub == 0; + } + + OVR_FORCE_INLINE void Invalidate() + { + _stub = 0; + } + + // Delegate creation from a function + + template <ret_type (*F)(arg1_type, arg2_type)> + static OVR_FORCE_INLINE this_type FromFree() + { + return this_type(0, &FreeStub<F>); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type)> + static OVR_FORCE_INLINE this_type FromMember(T *object) + { + return this_type(object, &MemberStub<T, F>); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type) const> + static OVR_FORCE_INLINE this_type FromConstMember(T const *object) + { + return this_type(const_cast<T*>( object ), &ConstMemberStub<T, F>); + } + + // In-place assignment to a different function + + template <ret_type (*F)(arg1_type, arg2_type)> + OVR_FORCE_INLINE void SetFree() + { + *this = FromFree<F>(); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type)> + OVR_FORCE_INLINE void SetMember(T *object) + { + *this = FromMember<T, F>(object); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type) const> + OVR_FORCE_INLINE void SetConstMember(T const *object) + { + *this = FromConstMember<T, F>(object); + } +}; + + +template <class ret_type, class arg1_type, class arg2_type, class arg3_type> +class Delegate3 +{ + typedef ret_type (*StubPointer)(void *, arg1_type, arg2_type, arg3_type); + typedef Delegate3<ret_type, arg1_type, arg2_type, arg3_type> this_type; + + void *_object; + StubPointer _stub; + + OVR_FORCE_INLINE Delegate3(void *object, StubPointer stub) + { + _object = object; + _stub = stub; + } + + // Stubs + + template <ret_type (*F)(arg1_type, arg2_type, arg3_type)> + static OVR_FORCE_INLINE ret_type FreeStub(void * /*object*/, arg1_type a1, arg2_type a2, arg3_type a3) + { + return (F)(a1, a2, a3); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type, arg3_type)> + static OVR_FORCE_INLINE ret_type MemberStub(void *object, arg1_type a1, arg2_type a2, arg3_type a3) + { + T *p = static_cast<T*>(object); + return (p->*F)(a1, a2, a3); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type, arg3_type) const> + static OVR_FORCE_INLINE ret_type ConstMemberStub(void *object, arg1_type a1, arg2_type a2, arg3_type a3) + { + T *p = static_cast<T*>(object); + return (p->*F)(a1, a2, a3); + } + +public: + OVR_FORCE_INLINE Delegate3() : _object(0), _stub(0){} + + // Function invocation + + OVR_FORCE_INLINE ret_type operator()(arg1_type a1, arg2_type a2, arg3_type a3) const + { + return (*_stub)(_object, a1, a2, a3); + } + + // Use stub pointer as a validity flag and equality checker + + OVR_FORCE_INLINE bool operator==(const this_type &rhs) const + { + return _object == rhs._object && _stub == rhs._stub; + } + + OVR_FORCE_INLINE bool operator!=(const this_type &rhs) const + { + return _object != rhs._object || _stub != rhs._stub; + } + + OVR_FORCE_INLINE bool IsValid() const + { + return _stub != 0; + } + + OVR_FORCE_INLINE bool operator!() const + { + return _stub == 0; + } + + OVR_FORCE_INLINE void Invalidate() + { + _stub = 0; + } + + // Delegate creation from a function + + template <ret_type (*F)(arg1_type, arg2_type, arg3_type)> + static OVR_FORCE_INLINE this_type FromFree() + { + return this_type(0, &FreeStub<F>); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type, arg3_type)> + static OVR_FORCE_INLINE this_type FromMember(T *object) + { + return this_type(object, &MemberStub<T, F>); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type, arg3_type) const> + static OVR_FORCE_INLINE this_type FromConstMember(T const *object) + { + return this_type(const_cast<T*>( object ), &ConstMemberStub<T, F>); + } + + // In-place assignment to a different function + + template <ret_type (*F)(arg1_type, arg2_type, arg3_type)> + OVR_FORCE_INLINE void SetFree() + { + *this = FromFree<F>(); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type, arg3_type)> + OVR_FORCE_INLINE void SetMember(T *object) + { + *this = FromMember<T, F>(object); + } + + template <class T, ret_type (T::*F)(arg1_type, arg2_type, arg3_type) const> + OVR_FORCE_INLINE void SetConstMember(T const *object) + { + *this = FromConstMember<T, F>(object); + } +}; + +// Add more here if needed, but keep in mind that a short, simple interface +// is rewarded by making the delegates faster... + + +} // namespace OVR + +#endif // OVR_Delegates_h |