ACE_Sbrk_Memory_Pool(3)

NAME

ACE_Sbrk_Memory_Pool - Make a memory pool that is based on sbrk(2).

SYNOPSIS

#include <ace/ACE_Memory_Pool.h>
class ACE_Sbrk_Memory_Pool
{
  public:
    typedef ACE_Sbrk_Memory_Pool_Options OPTIONS;
    ACE_Sbrk_Memory_Pool (
        LPCTSTR backing_store_name = 0,
        const OPTIONS *options = 0
        );
    virtual ~ACE_Sbrk_Memory_Pool (void);
    virtual void *init_acquire (
        size_t nbytes,
        size_t &rounded_bytes,
        int &first_time
        );
    virtual void *acquire (size_t nbytes, size_t &rounded_bytes);
    virtual int release (void);
    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 void dump (void) const;
    ACE_ALLOC_HOOK_DECLARE;
  protected:
    virtual size_t round_up (size_t nbytes);
};

Implementor operations.

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);

Acquire at least NBYTES from the memory pool. ROUNDED_BYTES is the actual number of bytes allocated.

virtual int release (void);

Instruct the memory pool to release all of its resources.

virtual int sync (ssize_t len = -1, int flags = MS_SYNC);

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

virtual int sync (void *addr, size_t len, int flags = MS_SYNC);

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

virtual int protect (ssize_t len = -1, int prot = PROT_RDWR);

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

virtual int protect (void *addr, size_t len, int prot = PROT_RDWR);

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

virtual void dump (void) const;

Dump the state of an object.

ACE_ALLOC_HOOK_DECLARE;

Declare the dynamic allocation hooks.

AUTHOR

Doug Schmidt and Prashant Jain

LIBRARY

ace