ACE
6.1.2
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Make a memory pool that is based on "anonymous" memory regions allocated from the Win32 page file. More...
#include <Pagefile_Memory_Pool.h>
Classes | |
class | Control_Block |
Attributes that are meaningful in local storage only. More... | |
Public Types | |
typedef ACE_Pagefile_Memory_Pool_Options | OPTIONS |
Public Member Functions | |
ACE_Pagefile_Memory_Pool (const ACE_TCHAR *backing_store_name=0, const OPTIONS *options=0) | |
Initialize the pool. | |
virtual | ~ACE_Pagefile_Memory_Pool (void) |
Destructor. | |
void * | init_acquire (size_t nbytes, size_t &rounded_bytes, int &first_time) |
Ask system for initial chunk of shared memory. | |
void * | acquire (size_t nbytes, size_t &rounded_bytes) |
int | release (int destroy=1) |
Instruct the memory pool to release all of its resources. | |
virtual int | seh_selector (void *) |
int | remap (void *addr) |
size_t | round_to_page_size (size_t nbytes) |
Round up to system page size. | |
size_t | round_to_chunk_size (size_t nbytes) |
Round up to the chunk size required by the operation system. | |
int | sync (ssize_t=-1, int=MS_SYNC) |
int | sync (void *, size_t, int=MS_SYNC) |
int | protect (ssize_t=-1, int=PROT_RDWR) |
int | protect (void *, size_t, int=PROT_RDWR) |
virtual void * | base_addr (void) const |
void | dump (void) const |
Protected Member Functions | |
int | map (int &firstTime, size_t appendBytes=0) |
int | unmap (void) |
Release the mapping. | |
Private Attributes | |
Control_Block | local_cb_ |
Description of what our process mapped. | |
Control_Block * | shared_cb_ |
Shared memory pool statistics. | |
ACE_HANDLE | object_handle_ |
File mapping handle. | |
size_t | page_size_ |
System page size. | |
ACE_TCHAR | backing_store_name_ [MAXPATHLEN] |
Name of the backing store where the shared memory pool is kept. |
Make a memory pool that is based on "anonymous" memory regions allocated from the Win32 page file.
ACE_Pagefile_Memory_Pool::ACE_Pagefile_Memory_Pool | ( | const ACE_TCHAR * | backing_store_name = 0 , |
const OPTIONS * | options = 0 |
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) |
Initialize the pool.
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virtual |
Destructor.
void * ACE_Pagefile_Memory_Pool::acquire | ( | size_t | nbytes, |
size_t & | rounded_bytes | ||
) |
Acquire at least nbytes from the memory pool. <rounded_bytes> is the actual number of bytes allocated.
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inlinevirtual |
Return the base address of this memory pool, 0 if base_addr never changes.
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inline |
void * ACE_Pagefile_Memory_Pool::init_acquire | ( | size_t | nbytes, |
size_t & | rounded_bytes, | ||
int & | first_time | ||
) |
Ask system for initial chunk of shared memory.
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protected |
Map portions or the entire pool into the local virtual address space. To do this, we compute the new file_offset
of the backing store and commit the memory.
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inline |
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inline |
int ACE_Pagefile_Memory_Pool::release | ( | int | destroy = 1 | ) |
Instruct the memory pool to release all of its resources.
int ACE_Pagefile_Memory_Pool::remap | ( | void * | addr | ) |
Try to extend the virtual address space so that addr is now covered by the address mapping. The method succeeds and returns 0 if the backing store has adequate memory to cover this address. Otherwise, it returns -1. This method is typically called by an exception handler for a Win32 structured exception when another process has grown the backing store (and its mapping) and our process now incurs a fault because our mapping isn't in range (yet).
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inline |
Round up to the chunk size required by the operation system.
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inline |
Round up to system page size.
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virtual |
Win32 Structural exception selector. The return value decides how to handle memory pool related structural exceptions. Returns 1, 0, or , -1.
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inline |
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inline |
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protected |
Release the mapping.
Name of the backing store where the shared memory pool is kept.
Description of what our process mapped.
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private |
File mapping handle.
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private |
System page size.
Shared memory pool statistics.