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ACE_Local_Memory_Pool Class Reference

Make a memory pool that is based on C++ new/delete. This is useful for integrating existing components that use new/delete into the ACE Malloc scheme... More...

#include <Local_Memory_Pool.h>

Collaboration diagram for ACE_Local_Memory_Pool:

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List of all members.

Public Types

typedef ACE_Local_Memory_Pool_Options OPTIONS

Public Member Functions

 ACE_Local_Memory_Pool (const ACE_TCHAR *backing_store_name=0, const OPTIONS *options=0)
 Initialize the pool.

virtual ~ACE_Local_Memory_Pool (void)
virtual void * init_acquire (size_t nbytes, size_t &rounded_bytes, int &first_time)
 Ask system for initial chunk of local memory.

virtual void * acquire (size_t nbytes, size_t &rounded_bytes)
virtual int release (int destroy=1)
 Instruct the memory pool to release all of its resources.

virtual int sync (ssize_t len=-1, int flags=MS_SYNC)
virtual int sync (void *addr, size_t len, int flags=MS_SYNC)
virtual int protect (ssize_t len=-1, int prot=PROT_RDWR)
virtual int protect (void *addr, size_t len, int prot=PROT_RDWR)
virtual int seh_selector (void *)
virtual int remap (void *addr)
virtual void * base_addr (void) const
virtual void dump (void) const
 Dump the state of an object.


Public Attributes

 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks.


Protected Member Functions

virtual size_t round_up (size_t nbytes)

Protected Attributes

ACE_Unbounded_Set< char * > allocated_chunks_
 List of memory that we have allocated.

Detailed Description

Make a memory pool that is based on C++ new/delete. This is useful for integrating existing components that use new/delete into the ACE Malloc scheme...

Definition at line 48 of file Local_Memory_Pool.h.

Member Typedef Documentation

typedef ACE_Local_Memory_Pool_Options ACE_Local_Memory_Pool::OPTIONS
 

Definition at line 51 of file Local_Memory_Pool.h.

Referenced by ACE_Local_Memory_Pool().

Constructor & Destructor Documentation

ACE_Local_Memory_Pool::ACE_Local_Memory_Pool (  const ACE_TCHAR *  backing_store_name = 0,
const OPTIONS *  options = 0
) 
 

Initialize the pool.

Definition at line 23 of file Local_Memory_Pool.cpp.

References ACE_TCHAR, ACE_TRACE, and OPTIONS. 

00025 {
00026   ACE_TRACE ("ACE_Local_Memory_Pool::ACE_Local_Memory_Pool");
00027 }

ACE_Local_Memory_Pool::~ACE_Local_Memory_Pool (  void   )  [virtual]
 

Definition at line 29 of file Local_Memory_Pool.cpp.

References release(). 

00030 {
00031   // Free up all memory allocated by this pool.
00032   this->release ();
00033 }

Member Function Documentation

void * ACE_Local_Memory_Pool::acquire (  size_t  nbytes,
size_t &  rounded_bytes
)  [virtual]
 

Acquire at least nbytes from the memory pool. rounded_bytes is the actual number of bytes allocated.

Definition at line 51 of file Local_Memory_Pool.cpp.

References ACE_ERROR_RETURN, ACE_LIB_TEXT, ACE_NEW_RETURN, ACE_TRACE, allocated_chunks_, ACE_Auto_Basic_Array_Ptr< X >::get(), ACE_Unbounded_Set< char * >::insert(), LM_ERROR, ACE_Auto_Basic_Array_Ptr< X >::release(), and round_up().

Referenced by init_acquire(). 

00053 {
00054   ACE_TRACE ("ACE_Local_Memory_Pool::acquire");
00055   rounded_bytes = this->round_up (nbytes);
00056 
00057   char *temp = 0;
00058   ACE_NEW_RETURN (temp,
00059                   char[rounded_bytes],
00060                   0);
00061 
00062   ACE_Auto_Basic_Array_Ptr<char> cp (temp);
00063 
00064   if (this->allocated_chunks_.insert (cp.get ()) != 0)
00065     ACE_ERROR_RETURN ((LM_ERROR,
00066                        ACE_LIB_TEXT ("(%P|%t) insertion into set failed\n")),
00067                       0);
00068 
00069   return cp.release ();
00070 }

void * ACE_Local_Memory_Pool::base_addr (  void   )  const [virtual]
 

Return the base address of this memory pool, 0 if base_addr never changes.

Definition at line 131 of file Local_Memory_Pool.cpp. 

00132 {
00133   return 0;
00134 }

ACE_BEGIN_VERSIONED_NAMESPACE_DECL void ACE_Local_Memory_Pool::dump (  void   )  const [virtual]
 

Dump the state of an object.

Definition at line 16 of file Local_Memory_Pool.cpp.

References ACE_TRACE. 

00017 {
00018 #if defined (ACE_HAS_DUMP)
00019   ACE_TRACE ("ACE_Local_Memory_Pool::dump");
00020 #endif /* ACE_HAS_DUMP */
00021 }

void * ACE_Local_Memory_Pool::init_acquire (  size_t  nbytes,
size_t &  rounded_bytes,
int &  first_time
)  [virtual]
 

Ask system for initial chunk of local memory.

Definition at line 37 of file Local_Memory_Pool.cpp.

References ACE_TRACE, and acquire(). 

00040 {
00041   ACE_TRACE ("ACE_Local_Memory_Pool::init_acquire");
00042   // Note that we assume that when ACE_Local_Memory_Pool is used,
00043   // ACE_Malloc's constructor will only get called once.  If this
00044   // assumption doesn't hold, we are in deep trouble!
00045 
00046   first_time = 1;
00047   return this->acquire (nbytes, rounded_bytes);
00048 }

int ACE_Local_Memory_Pool::protect (  void *  addr,
size_t  len,
int  prot = PROT_RDWR
)  [virtual]
 

Change the protection of the pages of the mapped region to starting at up to bytes.

Definition at line 108 of file Local_Memory_Pool.cpp.

References ACE_TRACE. 

00109 {
00110   ACE_TRACE ("ACE_Local_Memory_Pool::protect");
00111   return 0;
00112 }

int ACE_Local_Memory_Pool::protect (  ssize_t  len = -1,
int  prot = PROT_RDWR
)  [virtual]
 

Change the protection of the pages of the mapped region to starting at <this->base_addr_> up to bytes. If == -1 then change protection of all pages in the mapped region.

Definition at line 101 of file Local_Memory_Pool.cpp.

References ACE_TRACE, and ssize_t. 

00102 {
00103   ACE_TRACE ("ACE_Local_Memory_Pool::protect");
00104   return 0;
00105 }

int ACE_Local_Memory_Pool::release (  int  destroy = 1  )  [virtual]
 

Instruct the memory pool to release all of its resources.

Definition at line 73 of file Local_Memory_Pool.cpp.

References ACE_TRACE, allocated_chunks_, ACE_Unbounded_Set< char * >::begin(), ACE_Unbounded_Set< char * >::end(), and ACE_Unbounded_Set< char * >::reset().

Referenced by ~ACE_Local_Memory_Pool(). 

00074 {
00075   ACE_TRACE ("ACE_Local_Memory_Pool::release");
00076 
00077   // Zap the memory we allocated.
00078   for (ACE_Unbounded_Set<char *>::iterator i = this->allocated_chunks_.begin ();
00079        i != this->allocated_chunks_.end ();
00080        ++i)
00081     delete [] *i;
00082   this->allocated_chunks_.reset ();
00083   return 0;
00084 }

int ACE_Local_Memory_Pool::remap (  void *  addr  )  [virtual]
 

Try to extend the virtual address space so that is now covered by the address mapping. Always returns 0 since we can't remap a local memory pool.

Definition at line 124 of file Local_Memory_Pool.cpp. 

00125 {
00126   return 0;
00127   // Not much can be done.
00128 }

size_t ACE_Local_Memory_Pool::round_up (  size_t  nbytes  )  [protected, virtual]
 

Implement the algorithm for rounding up the request to an appropriate chunksize.

Definition at line 138 of file Local_Memory_Pool.cpp.

References ACE_TRACE, and ACE::round_to_pagesize().

Referenced by acquire(). 

00139 {
00140   ACE_TRACE ("ACE_Local_Memory_Pool::round_up");
00141   return ACE::round_to_pagesize (static_cast<off_t> (nbytes));
00142 }

int ACE_Local_Memory_Pool::seh_selector (  void *   )  [virtual]
 

Win32 Structural exception selector. The return value decides how to handle memory pool related structural exceptions. Returns 1, 0, or , -1.

Definition at line 116 of file Local_Memory_Pool.cpp. 

00117 {
00118   return 0;
00119   // Continue propagate the structural exception up.
00120 }

int ACE_Local_Memory_Pool::sync (  void *  addr,
size_t  len,
int  flags = MS_SYNC
)  [virtual]
 

Sync len bytes of the memory region to the backing store starting at add_.

Definition at line 94 of file Local_Memory_Pool.cpp.

References ACE_TRACE. 

00095 {
00096   ACE_TRACE ("ACE_Local_Memory_Pool::sync");
00097   return 0;
00098 }

int ACE_Local_Memory_Pool::sync (  ssize_t  len = -1,
int  flags = MS_SYNC
)  [virtual]
 

Sync len bytes of the memory region to the backing store starting at <this->base_addr_>. If len == -1 then sync the whole region.

Definition at line 87 of file Local_Memory_Pool.cpp.

References ACE_TRACE, and ssize_t. 

00088 {
00089   ACE_TRACE ("ACE_Local_Memory_Pool::sync");
00090   return 0;
00091 }

Member Data Documentation

ACE_Local_Memory_Pool::ACE_ALLOC_HOOK_DECLARE
 

Declare the dynamic allocation hooks.

Definition at line 118 of file Local_Memory_Pool.h.

ACE_Unbounded_Set<char *> ACE_Local_Memory_Pool::allocated_chunks_ [protected]
 

List of memory that we have allocated.

Definition at line 122 of file Local_Memory_Pool.h.

Referenced by acquire(), and release().

The documentation for this class was generated from the following files:
Generated on Thu Nov 9 11:23:41 2006 for ACE by doxygen 1.3.6