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<TITLE>VecCUDARestoreArrayRead</TITLE>
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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="VecCUDARestoreArrayRead"><H1>VecCUDARestoreArrayRead</H1></A>
Restore a CUDA device pointer previously acquired with <A HREF="../Vec/VecCUDAGetArrayRead.html#VecCUDAGetArrayRead">VecCUDAGetArrayRead</A>().
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
PETSC_EXTERN PetscErrorCode VecCUDARestoreArrayRead(Vec v, PetscScalar **a)
</PRE>
If the data on the host side was previously up to date it will remain
so, i.e. data on both the device and the host is up to date.
Accessing data on the host side e.g. with <A HREF="../Vec/VecGetArray.html#VecGetArray">VecGetArray</A>() does not
incur a device to host data transfer.
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>v </B></TD><TD>- the vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>a </B></TD><TD>- the CUDA device pointer. This pointer is invalid after
<A HREF="../Vec/VecCUDARestoreArrayRead.html#VecCUDARestoreArrayRead">VecCUDARestoreArrayRead</A>() returns.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Fortran note</FONT></H3>
This function is not currently available from Fortran.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecCUDAGetArrayRead.html#VecCUDAGetArrayRead">VecCUDAGetArrayRead</A>(), <A HREF="../Vec/VecCUDAGetArrayWrite.html#VecCUDAGetArrayWrite">VecCUDAGetArrayWrite</A>(), <A HREF="../Vec/VecCUDAGetArrayReadWrite.html#VecCUDAGetArrayReadWrite">VecCUDAGetArrayReadWrite</A>(), <A HREF="../Vec/VecGetArray.html#VecGetArray">VecGetArray</A>(), <A HREF="../Vec/VecRestoreArray.html#VecRestoreArray">VecRestoreArray</A>(), <A HREF="../Vec/VecGetArrayRead.html#VecGetArrayRead">VecGetArrayRead</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/vec/impls/seq/seqcuda/veccuda2.cu#VecCUDARestoreArrayRead">src/vec/vec/impls/seq/seqcuda/veccuda2.cu</A>
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