smart_pointer.h

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/* -----------------------------------------------------------------------
   See COPYRIGHT.TXT and LICENSE.TXT for copyright and license information
   ----------------------------------------------------------------------- */
#ifndef _smart_pointer_h_
#define _smart_pointer_h_
 
#include "plm_config.h"
 
#if PLM_CUDA_COMPILE
/* There is a bug in Linux CUDA 4.x nvcc compiler which causes it to 
   barf with either dlib::shared_ptr or std::shared_ptr */
# define SMART_POINTER_SUPPORT(T)                         \
    typedef void* Pointer
#else
 
#  include <memory>
#  define plm_shared_ptr std::shared_ptr
 
# define SMART_POINTER_SUPPORT(T)                               \
    public:                                                     \
    typedef T Self;                                             \
    typedef plm_shared_ptr<Self> Pointer;                       \
    static typename T::Pointer New () {                         \
        return T::Pointer (new T);                              \
    }                                                           \
    static typename T::Pointer New (T* t) {                     \
        return T::Pointer (t);                                  \
    }                                                           \
    template<class U1                                           \
        > static typename T::Pointer New (                      \
            const U1& u1) {                                     \
        return T::Pointer (                                     \
            new T(u1));                                         \
    }                                                           \
    template<class U1, class U2                                 \
        > static typename T::Pointer New (                      \
            const U1& u1, const U2& u2) {                       \
        return T::Pointer (                                     \
            new T(u1, u2));                                     \
    }                                                           \
    template<class U1, class U2, class U3                       \
        > static typename T::Pointer New (                      \
            const U1& u1, const U2& u2, const U3& u3) {         \
        return T::Pointer (                                     \
            new T(u1, u2, u3));                                 \
    }                                                           \
    template<class U1, class U2, class U3,                      \
             class U4, class U5, class U6                       \
        > static typename T::Pointer New (                      \
            const U1& u1, const U2& u2, const U3& u3,           \
            const U4& u4, const U5& u5, const U6& u6) {         \
        return T::Pointer (                                     \
            new T(u1, u2, u3, u4, u5, u6));                     \
    }
 
/* A warning for the future.
   (1) Template parameter assignment produces types, and therefore 
   arguments to New() are pass-by value
   (2a) Therefore, classes without copy constructors require 
   explicit reference in signature; for example:
       template <class U> foo (U& u);
   (2b) In principle, using a reference should be faster, because
   a copy constructor is not needed.
   (3) However, you cannot overload based on reference.  The gcc
   compiler (probably others too) can't resolve:
       template <class U> foo (U u);
       template <class U> foo (const U& u);
*/
 
#endif
 
#endif