ACE_Shared_Memory_SV(3)

NAME

ACE_Shared_Memory_SV - Shared memory wrapper based on System V shared memory.

SYNOPSIS

#include <ace/Shared_Memory_SV.h>
class ACE_Shared_Memory_SV : public ACE_Shared_Memory
{
  public:
    enum{ ACE_CREATE = IPC_CREAT, ACE_OPEN = 0 };
    ACE_Shared_Memory_SV (void);
    ACE_Shared_Memory_SV (
        key_t id,
        int length,
        int create = ACE_Shared_Memory_SV::ACE_OPEN,
        int perms = ACE_DEFAULT_FILE_PERMS,
        void *addr = 0,
        int flags = 0
        );
    int open (
        key_t id,
        int length,
        int create = ACE_Shared_Memory_SV::ACE_OPEN,
        int perms = ACE_DEFAULT_FILE_PERMS,
        void *addr = 0,
        int flags = 0
        );
    virtual int close (void);
    virtual int remove (void);
    virtual void *malloc (size_t = 0);
    virtual int free (void *p);
    virtual int get_segment_size (void) const;
    virtual ACE_HANDLE get_id (void) const;
    void dump (void) const;
    ACE_ALLOC_HOOK_DECLARE;
  private:
    ACE_SV_Shared_Memory shared_memory_;
};

DESCRIPTION

This class provides a very simple-minded shared memory manager. For more a powerful memory allocator please see ACE_Malloc.

Initialization and termination methods.

ACE_Shared_Memory_SV (void);

ACE_Shared_Memory_SV (
    key_t id,
    int length,
    int create = ACE_Shared_Memory_SV::ACE_OPEN,
    int perms = ACE_DEFAULT_FILE_PERMS,
    void *addr = 0,
    int flags = 0
    );

int open (
    key_t id,
    int length,
    int create = ACE_Shared_Memory_SV::ACE_OPEN,
    int perms = ACE_DEFAULT_FILE_PERMS,
    void *addr = 0,
    int flags = 0
    );

virtual int close (void);

Close down the shared memory segment.

virtual int remove (void);

Remove the underlying shared memory segment.

Allocation and deallocation methods.

virtual void *malloc (size_t = 0);

Create a new chuck of memory containing size bytes.

virtual int free (void *p);

Free a chuck of memory allocated by ACE_Shared_Memory_SV::malloc.

virtual int get_segment_size (void) const;

Return the size of the shared memory segment.

virtual ACE_HANDLE get_id (void) const;

Return the ID of the shared memory segment (i.e., a System V shared memory internal id).

void dump (void) const;

Dump the state of an object.

ACE_ALLOC_HOOK_DECLARE;

Declare the dynamic allocation hooks.

AUTHOR

Doug Schmidt

LIBRARY

ace