Platform Class Reference

#include <v8-platform.h>

Public Types
enum	ExpectedRuntime { kShortRunningTask , kLongRunningTask }

Public Member Functions
virtual	~Platform ()
virtual void	CallOnBackgroundThread (Task *task, ExpectedRuntime expected_runtime)=0
virtual void	CallOnForegroundThread (Isolate *isolate, Task *task)=0
virtual void	CallDelayedOnForegroundThread (Isolate *isolate, Task *task, double delay_in_seconds)
virtual double	MonotonicallyIncreasingTime ()=0

Detailed Description

V8 Platform abstraction layer.

The embedder has to provide an implementation of this interface before initializing the rest of V8.

Definition at line 28 of file v8-platform.h.

Member Enumeration Documentation

ExpectedRuntime

enum ExpectedRuntime

This enum is used to indicate whether a task is potentially long running, or causes a long wait. The embedder might want to use this hint to decide whether to execute the task on a dedicated thread.

Enumerator
kShortRunningTask
kLongRunningTask

Definition at line 35 of file v8-platform.h.

Constructor & Destructor Documentation

~Platform()

virtual ~Platform ( )

inlinevirtual

Definition at line 40 of file v8-platform.h.

Member Function Documentation

CallDelayedOnForegroundThread()

virtual void CallDelayedOnForegroundThread ( Isolate *  isolate, Task *  task, double  delay_in_seconds  )

inlinevirtual

Schedules a task to be invoked on a foreground thread wrt a specific |isolate| after the given number of seconds |delay_in_seconds|. Tasks posted for the same isolate should be execute in order of scheduling. The definition of "foreground" is opaque to V8.

Definition at line 65 of file v8-platform.h.

CallOnBackgroundThread()

virtual void CallOnBackgroundThread ( Task *  task, ExpectedRuntime  expected_runtime  )

pure virtual

Schedules a task to be invoked on a background thread. |expected_runtime| indicates that the task will run a long time. The Platform implementation takes ownership of |task|. There is no guarantee about order of execution of tasks wrt order of scheduling, nor is there a guarantee about the thread the task will be run on.

CallOnForegroundThread()

virtual void CallOnForegroundThread ( Isolate *  isolate, Task *  task  )

pure virtual

Schedules a task to be invoked on a foreground thread wrt a specific |isolate|. Tasks posted for the same isolate should be execute in order of scheduling. The definition of "foreground" is opaque to V8.

MonotonicallyIncreasingTime()

virtual double MonotonicallyIncreasingTime ( )

pure virtual

Monotonically increasing time in seconds from an arbitrary fixed point in the past. This function is expected to return at least millisecond-precision values. For this reason, it is recommended that the fixed point be no further in the past than the epoch.

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The documentation for this class was generated from the following file:

• include/v8-platform.h