---
name: "ACE_Deadline_Message_Strategy"
section: "3"
platform: "linux"
package: "libace-doc"
version: "5.0.7-4"
release: "Debian 2.2 (Potato)"
platforms: ["linux"]
url: "https://new.carta.tech/ACE_Deadline_Message_Strategy"
---

# ACE\_Deadline\_Message\_Strategy(3)

Deadline based message priority strategy.

## NAME

ACE\_Deadline\_Message\_Strategy -  Deadline based message priority strategy.

## SYNOPSIS

```
#include <ace/Message_Block.h>
class ACE_Deadline_Message_Strategy :
  public ACE_Dynamic_Message_Strategy
{
  public:
    ACE_Deadline_Message_Strategy (
        u_long static_bit_field_mask = 0x3FFUL,
        u_long static_bit_field_shift = 10,
        u_long dynamic_priority_max = 0x3FFFFFUL,
        u_long dynamic_priority_offset = 0x200000UL
        );
    virtual ~ACE_Deadline_Message_Strategy (void);
    virtual void convert_priority (
        ACE_Time_Value & priority,
        const ACE_Message_Block & mb
        );
    virtual void dump (void) const;
};
```

## DESCRIPTION

Assigns dynamic message priority according to time to deadline.  The message priority is divided into high and low order bit fields.  The high order bit field is used for dynamic message priority, which is updated whenever the convert\_priority (...) method is called.  The low order bit field is used for static message priority and is left unchanged.  The partitioning of the priority value into high and low order bit fields is done according to the arguments passed to the strategy object's constructor.

## PUBLIC MEMBERS

```
ACE_Deadline_Message_Strategy (
    u_long static_bit_field_mask = 0x3FFUL,
    u_long static_bit_field_shift = 10,
    u_long dynamic_priority_max = 0x3FFFFFUL,
    u_long dynamic_priority_offset = 0x200000UL
    );
```

Ctor, with all arguments defaulted.

```
virtual ~ACE_Deadline_Message_Strategy (void);
```

Virtual dtor.

```
virtual void convert_priority (
    ACE_Time_Value & priority,
    const ACE_Message_Block & mb
    );
```

Dynamic priority conversion function based on time to deadline.

```
virtual void dump (void) const;
```

Dump the state of the strategy.

## AUTHOR

Doug Schmidt

## LIBRARY

ace