#include <allocator.h>
Public Member Functions | |
| Allocator () | |
| AllocatorState | getState () const |
| T * | newElements (const int &elements=1) |
| void | reset () |
| void | rollBack () |
| void | rollBack (const AllocatorState &state) |
| void | set (const int &blockSize) |
| ~Allocator () | |
Private Attributes | |
| int | blockSize |
| int | index |
| std::vector< T * > | memory |
| int | remains |
This templated class assists in memory allocation and is well suited for instances when it is known that the sequence of memory allocations is performed in a stack-based manner, so that memory allocated last is released first. It also preallocates memory in chunks so that multiple requests for small chunks of memory do not require separate system calls to the memory manager. The allocator is templated off of the class of objects that we would like it to allocate, ensuring that appropriate constructors and destructors are called as necessary.
Definition at line 66 of file allocator.h.
| pcl::poisson::Allocator< T >::Allocator | ( | ) | [inline] |
Definition at line 73 of file allocator.h.
| pcl::poisson::Allocator< T >::~Allocator | ( | ) | [inline] |
Definition at line 77 of file allocator.h.
| AllocatorState pcl::poisson::Allocator< T >::getState | ( | ) | const [inline] |
This method returns the memory state of the allocator.
Definition at line 97 of file allocator.h.
| T* pcl::poisson::Allocator< T >::newElements | ( | const int & | elements = 1 | ) | [inline] |
This method returns a pointer to an array of elements objects. If there is left over pre-allocated memory, this method simply returns a pointer to the next free piece of memory, otherwise it pre-allocates more memory. Note that if the number of objects requested is larger than the value blockSize with which the allocator was initialized, the request for memory will fail.
Definition at line 192 of file allocator.h.
| void pcl::poisson::Allocator< T >::reset | ( | ) | [inline] |
This method is the allocators destructor. It frees up any of the memory that it has allocated.
Definition at line 86 of file allocator.h.
| void pcl::poisson::Allocator< T >::rollBack | ( | ) | [inline] |
This method rolls back the allocator so that it makes all of the memory previously allocated available for re-allocation. Note that it does it not call the constructor again, so after this method has been called, assumptions about the state of the values in memory are no longer valid.
Definition at line 111 of file allocator.h.
| void pcl::poisson::Allocator< T >::rollBack | ( | const AllocatorState & | state | ) | [inline] |
This method rolls back the allocator to the previous memory state and makes all of the memory previously allocated available for re-allocation. Note that it does it not call the constructor again, so after this method has been called, assumptions about the state of the values in memory are no longer valid.
Definition at line 134 of file allocator.h.
| void pcl::poisson::Allocator< T >::set | ( | const int & | blockSize | ) | [inline] |
This method initiallizes the constructor and the blockSize variable specifies the the number of objects that should be pre-allocated at a time.
Definition at line 178 of file allocator.h.
int pcl::poisson::Allocator< T >::blockSize [private] |
Definition at line 68 of file allocator.h.
int pcl::poisson::Allocator< T >::index [private] |
Definition at line 69 of file allocator.h.
std::vector<T*> pcl::poisson::Allocator< T >::memory [private] |
Definition at line 70 of file allocator.h.
int pcl::poisson::Allocator< T >::remains [private] |
Definition at line 69 of file allocator.h.