---
name: "ost_SharedMemPager"
section: "3"
platform: "linux"
package: "libcommoncpp2-doc"
version: "1.8.1-10"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/ost_SharedMemPager"
---

# ost\_SharedMemPager(3)

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

## 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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