# ACE_Obstack_T< CHAR > Class Template Reference

Define a simple "mark and release" memory allocation utility. More...

`#include <Obstack_T.h>`

Collaboration diagram for ACE_Obstack_T< CHAR >:

[legend]
List of all members.

## Public Member Functions

| ACE_Obstack_T (size_t size=(4096 *sizeof(CHAR))-sizeof(ACE_Obchunk), ACE_Allocator *allocator_strategy=0)
| ~ACE_Obstack_T (void)
int | request (size_t len)
CHAR * | grow (CHAR c)
void | grow_fast (CHAR c)
CHAR * | freeze (void)
CHAR * | copy (const CHAR *data, size_t len)
size_t | length (void) const
size_t | size (void) const
void | unwind (void *obj)
void | release (void)
void | dump (void) const
| Dump the state of an object.

## Public Attributes

| ACE_ALLOC_HOOK_DECLARE
| Declare the dynamic allocation hooks.

## Protected Member Functions

ACE_Obchunk * | new_chunk (void)
void | unwind_i (void *obj)

## Protected Attributes

ACE_Allocator * | allocator_strategy_
| Pointer to the allocator used by this Obstack.
size_t | size_
| Current size of the Obstack;.
ACE_Obchunk * | head_
| Head of the Obchunk chain.
ACE_Obchunk * | curr_
| Pointer to the current Obchunk.

## Detailed Description

### template<class CHAR>
class ACE_Obstack_T< CHAR >

Define a simple "mark and release" memory allocation utility.

The implementation is similar to the GNU obstack utility, which is used extensively in the GCC compiler.

## Constructor & Destructor Documentation

template<class CHAR>
ACE_Obstack_T< CHAR >::ACE_Obstack_T | ( | size_t | size = `(4096 *sizeof(CHAR))-sizeof(ACE_Obchunk)`,
|  | ACE_Allocator * | allocator_strategy = `0`
| ) |

template<class CHAR>
ACE_Obstack_T< CHAR >::~ACE_Obstack_T | ( | void |  | ) |

## Member Function Documentation

template<class CHAR>
CHAR * ACE_Obstack_T< CHAR >::copy | ( | const CHAR * | data,
|  | size_t | len
| ) |

| Copy the data into the current Obchunk and freeze the current block. Return the starting address of the current building block, 0 if error occurs. len specify the string length, not the actually data size.

template<class CHAR>
ACE_BEGIN_VERSIONED_NAMESPACE_DECL void ACE_Obstack_T< CHAR >::dump | ( | void |  | ) | const

| Dump the state of an object.

template<class CHAR>
ACE_INLINE CHAR * ACE_Obstack_T< CHAR >::freeze | ( | void |  | ) |

| Freeze the current building block by null terminating it. Return the starting address of the current building block, 0 if error occurs.

template<class CHAR>
CHAR * ACE_Obstack_T< CHAR >::grow | ( | CHAR | c | ) |

| Inserting a new CHAR c into the current building block without freezing (null terminating) the block. This function will create new chunk by checking the boundary of current Obchunk. Return the location c gets inserted to, or 0 if error.

template<class CHAR>
ACE_INLINE void ACE_Obstack_T< CHAR >::grow_fast | ( | CHAR | c | ) |

| Inserting a new CHAR c into the current building block without freezing (null terminating) the block and without checking for out-of-bound error.

template<class CHAR>
ACE_BEGIN_VERSIONED_NAMESPACE_DECL ACE_INLINE size_t ACE_Obstack_T< CHAR >::length | ( | void |  | ) | const

Return the maximum length or size of a string that can be put into this Obstack. size = length * sizeof (CHAR).

Deprecated:
  No need to use this function as you can put objects of arbitrary lengths into the obstack now.

template<class CHAR>
ACE_Obchunk * ACE_Obstack_T< CHAR >::new_chunk | ( | void |  | ) | `[protected]`

template<class CHAR>
void ACE_Obstack_T< CHAR >::release | ( | void |  | ) |

| "Release" the entire stack of Obchunks, putting it back on the free list.

template<class CHAR>
int ACE_Obstack_T< CHAR >::request | ( | size_t | len | ) |

| Request Obstack to prepare a block at least len long for building a new string. Return -1 if fail, 0 if success.

template<class CHAR>
ACE_INLINE size_t ACE_Obstack_T< CHAR >::size | ( | void |  | ) | const

template<class CHAR>
void ACE_Obstack_T< CHAR >::unwind | ( | void * | obj | ) |

| "Unwind" the stack. If obj is a null pointer, everything allocated in the stack is released. Otherwise, obj must be an address of an object allocated in the stack. In this case, obj is released along with everthing allocated in the Obstack since obj.

template<class CHAR>
void ACE_Obstack_T< CHAR >::unwind_i | ( | void * | obj | ) | `[protected]`

| Search through the list of Obchunks and release them. Helper funtion used by unwind.

## Member Data Documentation

template<class CHAR>
ACE_Obstack_T< CHAR >::ACE_ALLOC_HOOK_DECLARE

| Declare the dynamic allocation hooks.

template<class CHAR>
ACE_Allocator* ACE_Obstack_T< CHAR >::allocator_strategy_ `[protected]`

| Pointer to the allocator used by this Obstack.

template<class CHAR>
class ACE_Obchunk* ACE_Obstack_T< CHAR >::curr_ `[protected]`

| Pointer to the current Obchunk.

template<class CHAR>
class ACE_Obchunk* ACE_Obstack_T< CHAR >::head_ `[protected]`

| Head of the Obchunk chain.

template<class CHAR>
size_t ACE_Obstack_T< CHAR >::size_ `[protected]`

| Current size of the Obstack;.

The documentation for this class was generated from the following files:

- Obstack_T.h
- Obstack_T.cpp
- Obstack_T.inl