This module provides an implementation on Windows for the xdc.runtime.ITimestampProvider interface.

On Windows, the timestamp counter value is computed from the accumulated CPU user time spent running the SYS/BIOS application. This emulates a hardware timestamp counter by eliminating all the CPU time spent running the Windows kernel and other Windows applications.

It is important to understand that although Windows uses a real-time counter to accumulate the user time of a process, the accumulated total is updated only once every 10 milliseconds. Therefore, it is quite likely that two consecutive calls to TimestampProvider_get32() or TimestampProvider_get64() or will return the same value. In fact, the returned value will only change the next time Windows updates the accumulated user time.

Calling Context

Function	Hwi	Swi	Task	Main	Startup
get32	Y	Y	Y	Y	N
get64	Y	Y	Y	Y	N
getFreq	Y	Y	Y	Y	N
Definitions: Hwi: API is callable from a Hwi thread. Swi: API is callable from a Swi thread. Task: API is callable from a Task thread. Main: API is callable during any of these phases: In your module startup after this module is started (e.g. TimestampProvider_Module_startupDone() returns TRUE). During xdc.runtime.Startup.lastFxns. During main(). During BIOS.startupFxns. Startup: API is callable during any of these phases: During xdc.runtime.Startup.firstFxns. In your module startup before this module is started (e.g. TimestampProvider_Module_startupDone() returns FALSE).