ACT Namespace Reference

Classes
class	ACT_State
	Generically state of an ACT as a scheduler and other actions see it. More...
class	basic_act
	Base class for specific ACT uses. More...
class	simple_act
	Base class for ACT without background processing and no need for notification. More...
class	autonomous_act
	Base class for ACT that may initiate background activity and require notification. More...
class	act
class	Handle
	A marked, encapsulate ordinal, used as an index in offset operations. More...
class	Vector_with_Handle_Index
	A wrapper around std::vector, with its integral index replaced by a handle. More...
class	Handle_Registry_Leader
	A registry that maps handles to instances of a handled class. More...
class	Handle_Registry_Follower
	A registry indexed by handles issued by a Handle_Registry_Leader. More...
class	Handled
	A base class for handled classes. To use, use the derived class as the template parameter, as follows: class X : public class Handled< X > { ... } ;. More...
class	Null_Aspect_Handled
	Base for aspect classes of Handled. More...
class	Basic_Listen_Monitor
	Base class for monitor service actions. More...
class	Basic_Listening_Task
	Base class for tasks that may suspend themselves and listen for wakeup. More...
class	Pause_Demon
	A service that does nothing for some number of milliseconds if the scheduler has no tasks pending. More...
class	Scheduler
	Abstract interface to scheduler. More...
class	wakeup_listener
	Abstract interface to a function object that wakes up a listener task that's waiting. More...
class	wakeup_listener_allocated
	A managed-storage wrapper for wakeup listener as it's used with the Scheduling_Queue. More...
class	Basic_Wakeup_Listener
	The 'A' in ACT means 'asynchronous', so in general there must be a way of notifying a scheduler that an inactive ACT, one that has a pending sub-action, is ready to proceed. This class is the interface between a scheduler and such an ACT. More...
class	Basic_Scheduled_Item
	Data within the priority queue proper. This data is swapped during priority queue operations, so should remain as small as possible. More...
class	Basic_Scheduler
	A basic implementation of a scheduler. More...
class	Basic_Scheduler_Null_Aspect
	Base class for aspects of Basic_Scheduler. More...
class	Scheduled_Item
	The full data that goes into the scheduling queue. It includes the underlying item plus extra housekeeping information. More...
class	Auxiliary_Item
	The full data that goes into the scheduling queue. It includes the underlying item plus extra housekeeping information. More...
class	Scheduled_Item_Pointer
	A pointer into an item within a scheduling queue. Since items within the underlying container of a queue move around, a pointer is necessary to track such motion and provide a stable reference for outsiders. More...
class	Scheduling_Queue
	A queue responsible for storage allocation, item reference, and heap maintenance. This class is a basis on top of which to implement particular scheduling policies. More...
class	Generator
	A generator of actions, in bursts, used to feed a Service. This class is a base for service implementations. More...
class	Service
	A service is a persistent action whose result to create new actions and to schedule them for execution. More...
class	Service_Null_Aspect
	Null aspect for Service. More...
class	execution_trace
	A wrapper around a string to hold a logging trace of an execution pathway. More...
class	tracking_function
	A function to call once per activation. More...
class	simple_tracker
	Marks operation with a prefix designated at construction time. More...
class	N_to_completion_Monitor
	A monitor for N_to_completion. More...
class	N_to_completion
	Action that completes after N activations. More...
class	single_action
	An action that always completes at its first activation. More...
class	no_action
	An action that starts off completed. More...
class	Supplied_Generator
	A generator whose entries are added manually one by one. More...
class	Supplied_Service_Aspect< Service< Supplied_Service_Aspect > >
	Aspect for class Service that tracks the run function. More...
class	Supplied_Service
	A service whose tasks are manually added one by one. More...
Enumerations
enum	Basic_Priority {   Urgent = 0, Initial, Ordinary, Background,   Waiting }
enum	Action_Category { Task = 0, Demon, Critical_Demon }
	Category of actions within Basic_Scheduler. Distinguishes ordinary tasks from services, which have different scheduling policies. More...

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Enumeration Type Documentation

enum ACT::Action_Category

Category of actions within Basic_Scheduler. Distinguishes ordinary tasks from services, which have different scheduling policies.

Enumerator:

Task	An ordinary task, executed until completed, then discarded.
Demon	A demon task, never expected to complete, but which may complete. A demon executes with background priority in the scheduling queue. It may also have its own autonomous processing. The select() call behind the wakeup listener for network I/O, for example, is somewhere within a certain demon.
Critical_Demon	A critical demon is one that must be run in order for the scheduler to run.

enum ACT::Basic_Priority

Task Priorities.

We don't have issues of persistence with these values at the present. Should we ever want to do so, persisting string representations rather than binary values would be preferable.

Enumerator:

Urgent	Urgent tasks are activated as soon as they're entered. Shutdown notification, for example, is an urgent task.
Initial	The first activation of an action operates at higher priority than subsequent ones.
Ordinary	A task ready for its next activation is ordinary.
Background
Waiting

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