donner::ScopedSuspendPoint Class Reference

Brackets one call that may suspend the wasm stack under ASYNCIFY. More...

#include "donner/base/AsyncifySuspendProbe.h"

Public Member Functions
	ScopedSuspendPoint (SuspendKind kind)
	Open a suspend interval attributed to kind.
	~ScopedSuspendPoint ()
	Close the interval and fold its wall time into the thread's totals.
	ScopedSuspendPoint (const ScopedSuspendPoint &)=delete
ScopedSuspendPoint &	operator= (const ScopedSuspendPoint &)=delete
	ScopedSuspendPoint (ScopedSuspendPoint &&)=delete
ScopedSuspendPoint &	operator= (ScopedSuspendPoint &&)=delete

Detailed Description

Brackets one call that may suspend the wasm stack under ASYNCIFY.

Declare it in the narrowest scope that contains the suspending call:

{
  const ScopedSuspendPoint suspend(SuspendKind::DeviceWait);
  device.poll(false, nullptr);
}

Cheap enough to leave in release builds: two monotonic clock reads and a handful of thread-local adds. It is compiled on every platform so the desktop build exercises the same code the browser build measures.

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

• donner/base/AsyncifySuspendProbe.h