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<TITLE>PetscObjectStateDecrease</TITLE>
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<A NAME="PetscObjectStateDecrease"><H1>PetscObjectStateDecrease</H1></A>
Decreases the state of any <A HREF="../Sys/PetscObject.html#PetscObject">PetscObject</A>, regardless of the type.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
PetscErrorCode PetscObjectStateDecrease(PetscObject obj)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>obj </B> -any PETSc object, for example a <A HREF="../Vec/Vec.html#Vec">Vec</A>, <A HREF="../Mat/Mat.html#Mat">Mat</A> or <A HREF="../KSP/KSP.html#KSP">KSP</A>. This must be
cast with a (<A HREF="../Sys/PetscObject.html#PetscObject">PetscObject</A>), for example,
<A HREF="../Sys/PetscObjectStateIncrease.html#PetscObjectStateIncrease">PetscObjectStateIncrease</A>((<A HREF="../Sys/PetscObject.html#PetscObject">PetscObject</A>)mat);
<br>
<P>
Notes: object state is an integer which gets increased every time
the object is changed. By saving and later querying the object state
one can determine whether information about the object is still current.
Currently, state is maintained for <A HREF="../Vec/Vec.html#Vec">Vec</A> and <A HREF="../Mat/Mat.html#Mat">Mat</A> objects.
<P>
<P>
seealso: <A HREF="../Sys/PetscObjectStateQuery.html#PetscObjectStateQuery">PetscObjectStateQuery</A>(), <A HREF="../Sys/PetscObjectStateIncrease.html#PetscObjectStateIncrease">PetscObjectStateIncrease</A>()
<P>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../include/private/petscimpl.h.html#PetscObjectStateDecrease">include/private/petscimpl.h</A>
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