NAME

       ost::SharedMemPager - The shared mempager uses a mutex to protect key access methods.

SYNOPSIS

       #include <misc.h>

       Inherits ost::MemPager, and ost::Mutex.

   Protected Member Functions
       SharedMemPager (size_t pagesize=4096, const char *name=NULL)
           Create a mempager mutex pool.
       void purge (void)
           Purge the memory pool while locked.
       void * first (size_t size)
           Get the first memory page after locking.
       void * alloc (size_t size)
           Get the last memory page after locking.

   Additional Inherited Members

Detailed Description

       The shared mempager uses a mutex to protect key access methods.

       This class is used when a mempager will be shared by multiple threads.

       Author:
           David Sugar dyfet@ostel.com mutex protected memory pager.

Constructor & Destructor Documentation

   ost::SharedMemPager::SharedMemPager (size_t pagesize = 4096, const char * name = NULL)
       [protected]
       Create a mempager mutex pool.

       Parameters:
           pagesize page size for allocation.
           name a name for the pool.

Member Function Documentation

   void* ost::SharedMemPager::alloc (size_t size) [protected],  [virtual]
       Get the last memory page after locking.

       Returns:
           allocated memory space.

       Parameters:
           size of request.

       Reimplemented from ost::MemPager.

   void* ost::SharedMemPager::first (size_t size) [protected],  [virtual]
       Get the first memory page after locking.

       Returns:
           allocated memory space.

       Parameters:
           size of request.

       Reimplemented from ost::MemPager.

   void ost::SharedMemPager::purge (void) [protected]
       Purge the memory pool while locked.

Author

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