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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/diag/prdf/util/CcAutoDeletePointer.h $ */
/* */
/* IBM CONFIDENTIAL */
/* */
/* COPYRIGHT International Business Machines Corp. 1995,2012 */
/* */
/* p1 */
/* */
/* Object Code Only (OCO) source materials */
/* Licensed Internal Code Source Materials */
/* IBM HostBoot Licensed Internal Code */
/* */
/* The source code for this program is not published or otherwise */
/* divested of its trade secrets, irrespective of what has been */
/* deposited with the U.S. Copyright Office. */
/* */
/* Origin: 30 */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef CcAutoDeletePointer_h
#define CcAutoDeletePointer_h
// Class Specification *************************************************
//
// Class name: CcAutoDeletePointer
// Parent class: None.
//
// Summary: This class is used to implement an automatic delete on a
// pointer to memory obtained via new for a single instance.
// Its primary purpose is for use in functions that create a
// single instance dynamically and then perform some operations
// that may throw an exception.
//
// This class should be used as a local variable so that when the
// varaible goes out of scope, the destructor is called and the
// memory pointer is deleted. Because the variable is local, if
// an exception is thrown, it is guaranteed that the destructor
// for this variable will be run and the memory pointer will be
// deleted properly.
//
// Access to the pointer is available through the pointer
// dereference operators, operator->() and
// operator*(). The normal delete syntax is used
// (i.e. "delete ptr;").
//
// Cardinality: N
//
// Performance/Implementation:
// Space Complexity: Constant
// Time Complexity: Constant
//
// Usage Examples:
//
// struct MyType
// {
// void bar(void);
// };
//
// void foo(void)
// {
// CcAutoDeletePointer<MyType> ptr(new MyType());
//
// // Operations that may throw an exception
//
// ptr->bar(); // Using the pointer
//
// (*ptr).bar(); // Dereferencing
// }
//
//
// End Class Specification *********************************************
// Includes
template <class T>
class CcAutoDeletePointer
{
public: // public member functions
CcAutoDeletePointer(T * ptr);
// Function Specification ********************************************
//
// Purpose: Initialization
// Parameters: ptr: Pointer to auto-delete
// Returns: No value returned
// Requirements: None.
// Promises: All data members are initialized.
// Exceptions: None.
// Concurrency: N/A
//
// End Function Specification ****************************************
~CcAutoDeletePointer(void);
// Function Specification ********************************************
//
// Purpose: Destruction
// Parameters: None.
// Returns: No value returned
// Requirements: None.
// Promises: None.
// Exceptions: None.
// Concurrency: N/A
// Notes: The function deletes the data member pointer.
//
// End Function Specification ****************************************
T * operator->(void) const;
// Function Specification ********************************************
//
// Purpose: Provide access to pointer.
// Parameters: None.
// Returns: Pointer to template type.
// Requirements: None.
// Promises: None.
// Exceptions: None.
// Concurrency: Reentrant
//
// End Function Specification ****************************************
T & operator*(void) const;
// Function Specification ********************************************
//
// Purpose: Provide access to pointer.
// Parameters: None.
// Returns: Reference to template type.
// Requirements: None.
// Promises: None.
// Exceptions: None.
// Concurrency: Reentrant
//
// End Function Specification ****************************************
private:
CcAutoDeletePointer(const CcAutoDeletePointer<T> & e);
// Function Specification ********************************************
//
// Purpose: Copy
// Parameters: e: Reference to instance to copy
// Returns: No value returned.
// Requirements: None.
// Promises: All data members are initialized.
// Exceptions: None.
// Concurrency: N/A.
// Notes: This copy constructor is declared private and not defined
// to prohibit copying.
//
// End Function Specification ****************************************
CcAutoDeletePointer<T> & operator=(const CcAutoDeletePointer<T> & e);
// Function Specification ********************************************
//
// Purpose: Assigment
// Parameters: e: Reference to instance to assign from
// Returns: Reference to this instance
// Requirements: None.
// Promises: All data members will be assigned.
// Exceptions: N/A.
// Concurrency: N/A.
// Notes: This assignment operator is declared private and not defined
// to prohibit copying.
//
// End Function Specification ****************************************
T * pointer;
};
// Class Specification *************************************************
//
// Class name: CcAutoDeletePointerVector
// Parent class: None.
//
// Summary: This class is used to implement an automatic delete on a
// pointer to memory obtained via new for multiple instances.
// Its primary purpose is for use in functions that allocate
// multiple instances dynamically (e.g. "T * ptr = new T[5];")
// and then perform some operations that may throw an
// exception.
//
// This class should be used as a local variable so that when the
// varaible goes out of scope, the destructor is called and the
// memory pointer is deleted. Because the variable is local, if
// an exception is thrown, it is guaranteed that the destructor
// for this variable will be run and the memory pointer will be
// deleted properly.
//
// Access to the pointer is available through operator(). The
// vector delete syntax is used (e.g. "delete [] ptr;").
//
// Cardinality: N
//
// Performance/Implementation:
// Space Complexity: Constant
// Time Complexity: Constant
//
// Usage Examples:
//
// void foo(void)
// {
// CcAutoDeletePointerVector<char> ptr(new char[4]);
//
// // Operations that may throw an exception
//
// strcpy(ptr(), "abc"); // Using the Pointer
// }
//
//
// End Class Specification *********************************************
template <class T>
class CcAutoDeletePointerVector
{
public: // public member functions
CcAutoDeletePointerVector(T * ptr);
// Function Specification ********************************************
//
// Purpose: Initialization
// Parameters: ptr: Pointer to auto-delete
// Returns: No value returned
// Requirements: None.
// Promises: All data members are initialized.
// Exceptions: None.
// Concurrency: N/A
//
// End Function Specification ****************************************
~CcAutoDeletePointerVector(void);
// Function Specification ********************************************
//
// Purpose: Destruction
// Parameters: None.
// Returns: No value returned
// Requirements: None.
// Promises: None.
// Exceptions: None.
// Concurrency: N/A
// Notes: The function deletes the data member pointer.
//
// End Function Specification ****************************************
T * operator()(void) const;
// Function Specification ********************************************
//
// Purpose: Provide access to pointer.
// Parameters: None.
// Returns: Pointer to template type.
// Requirements: None.
// Promises: None.
// Exceptions: None.
// Concurrency: Reentrant
//
// End Function Specification ****************************************
private:
CcAutoDeletePointerVector(const CcAutoDeletePointerVector<T> & e);
// Function Specification ********************************************
//
// Purpose: Copy
// Parameters: e: Reference to instance to copy
// Returns: No value returned.
// Requirements: None.
// Promises: All data members are initialized.
// Exceptions: None.
// Concurrency: N/A.
// Notes: This copy constructor is declared private and not defined
// to prohibit copying.
//
// End Function Specification ****************************************
CcAutoDeletePointerVector<T> & operator=(
const CcAutoDeletePointerVector<T> & e);
// Function Specification ********************************************
//
// Purpose: Assigment
// Parameters: e: Reference to instance to assign from
// Returns: Reference to this instance
// Requirements: None.
// Promises: All data members will be assigned.
// Exceptions: N/A.
// Concurrency: N/A.
// Notes: This assignment operator is declared private and not defined
// to prohibit copying.
//
// End Function Specification ****************************************
T * pointer;
};
#include <CcAutoDeletePointer.inl>
// Change Log **********************************************************
//
// Flag PTR/DCR# Userid Date Description
// ---- -------- -------- -------- -----------
// n/a n/a JST 09/12/95 Created.
//
// End Change Log ******************************************************
#endif
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