[libvirt] [libvirt-perl][PATCH 5/7] Introduce Stream::sparse_send_all()
Daniel P. Berrange
berrange at redhat.com
Tue May 23 16:15:08 UTC 2017
On Tue, May 23, 2017 at 05:05:39PM +0200, Michal Privoznik wrote:
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
> Changes | 1 +
> Virt.xs | 124 +++++++++++++++++++++++++++++++++++++++++++++++++
> lib/Sys/Virt/Stream.pm | 19 ++++++++
> t/030-api-coverage.t | 2 +
> 4 files changed, 146 insertions(+)
>
> diff --git a/Changes b/Changes
> index 4c1e071..989b795 100644
> --- a/Changes
> +++ b/Changes
> @@ -8,6 +8,7 @@ Revision history for perl module Sys::Virt
> register RECV_STOP_AT_HOLE constant
> - Introduce Stream::recvHole() and Stream::sendHole()
> - Introduce Stream::sparse_recv_all()
> + - Introduce Stream::sparse_send_all()
>
> 3.3.0 2017-05-08
>
> diff --git a/Virt.xs b/Virt.xs
> index 002bd6a..fc282b8 100644
> --- a/Virt.xs
> +++ b/Virt.xs
> @@ -1960,6 +1960,100 @@ _stream_send_all_source(virStreamPtr st,
> }
>
>
> +static int
> +_stream_sparse_send_all_holeHandler(virStreamPtr st,
> + int *inData,
> + long long *length,
> + void *opaque)
Use _handler, rather than Handler - and the same elsewhere in this
patch.
> +{
> + AV *av = opaque;
> + SV **self;
> + SV **holeHandler;
> + SV *inDataSV;
> + SV *lengthSV;
> + int count;
> + int ret;
> + dSP;
> +
> + self = av_fetch(av, 0, 0);
> + holeHandler = av_fetch(av, 2, 0);
> +
> + SvREFCNT_inc(*self);
> +
> + ENTER;
> + SAVETMPS;
> +
> + PUSHMARK(SP);
> + XPUSHs(*self);
> + PUTBACK;
> +
> + count = call_sv((SV*)*holeHandler, G_ARRAY);
> +
> + SPAGAIN;
> +
> + if (count == 2) {
> + /* @holeHandler returns (inData, length), but on a stack.
> + * Therefore the order is reversed. */
> + lengthSV = POPs;
> + inDataSV = POPs;
> + *inData = virt_SvIVll(inDataSV);
> + *length = virt_SvIVll(lengthSV);
> + ret = 0;
> + } else {
> + ret = -1;
> + }
> +
> + PUTBACK;
> + FREETMPS;
> + LEAVE;
> +
> + return ret;
> +}
> +
> +
> +static int
> +_stream_sparse_send_all_skipHandler(virStreamPtr st,
> + long long length,
> + void *opaque)
> +{
> + AV *av = opaque;
> + SV **self;
> + SV **skipHandler;
> + int rv;
> + int ret;
> + dSP;
> +
> + self = av_fetch(av, 0, 0);
> + skipHandler = av_fetch(av, 3, 0);
> +
> + SvREFCNT_inc(*self);
> +
> + ENTER;
> + SAVETMPS;
> +
> + PUSHMARK(SP);
> + XPUSHs(*self);
> + XPUSHs(sv_2mortal(virt_newSVll(length)));
> + PUTBACK;
> +
> + rv = call_sv((SV*)*skipHandler, G_SCALAR);
> +
> + SPAGAIN;
> +
> + if (rv == 1) {
> + ret = POPi;
> + } else {
> + ret = -1;
> + }
> +
> + PUTBACK;
> + FREETMPS;
> + LEAVE;
> +
> + return ret;
> +}
> +
> +
> static int
> _stream_recv_all_sink(virStreamPtr st,
> const char *data,
> @@ -8041,6 +8135,36 @@ sparse_recv_all(stref, handler, holeHandler)
>
> SvREFCNT_dec(opaque);
>
> +void
> +sparse_send_all(stref, handler, holeHandler, skipHandler)
> + SV *stref;
> + SV *handler;
> + SV *holeHandler;
> + SV *skipHandler;
> + PREINIT:
> + AV *opaque;
> + virStreamPtr st;
> + CODE:
> + st = (virStreamPtr)SvIV((SV*)SvRV(stref));
> +
> + opaque = newAV();
> + SvREFCNT_inc(stref);
> + SvREFCNT_inc(handler);
> + SvREFCNT_inc(holeHandler);
> + SvREFCNT_inc(skipHandler);
> + av_push(opaque, stref);
> + av_push(opaque, handler);
> + av_push(opaque, holeHandler);
> + av_push(opaque, skipHandler);
> +
> + if (virStreamSparseSendAll(st,
> + _stream_send_all_source,
> + _stream_sparse_send_all_holeHandler,
> + _stream_sparse_send_all_skipHandler,
> + opaque) < 0)
> + _croak_error();
> +
> + SvREFCNT_dec(opaque);
>
> void
> add_callback(stref, events, cb)
> diff --git a/lib/Sys/Virt/Stream.pm b/lib/Sys/Virt/Stream.pm
> index c32b957..e3b25a5 100644
> --- a/lib/Sys/Virt/Stream.pm
> +++ b/lib/Sys/Virt/Stream.pm
> @@ -144,6 +144,25 @@ bytes). The C<$holeHandler> is expected to return a non-negative
> number on success (usually 0) and a negative number (usually -1)
> otherwise.
>
> +=item $st->sparse_send_all($handler, $holeHandler, $skipHandler)
> +
> +Send all data produced by C<$handler> to the stream. The
> +C<$handler> parameter must be a function which expects three
> +arguments, the C<$st> stream object, a scalar which must be
> +filled with data and a maximum data byte count desired. The
> +function should return the number of bytes filled, 0 on end of
> +file, or -1 upon error. The second argument C<$holeHandler> is a
> +function expecting just one argument C<$st> and returning an
> +array of two elements (C<$inData>, C<$sectionLen>) where
> +C<$inData> has zero or non-zero value if underlying file is in a
> +hole or data section respectively. The C<$sectionLen> then is the
> +number of remaining bytes in the current section in the
> +underlying file. Finally, the third C<$skipHandler> is a function
> +expecting two arguments C<$st> and C<$length> which moves cursor
> +in the underlying file for C<$length> bytes. The C<$skipHandler>
> +is expected to return a non-negative number on success (usually
> +0) and a negative number (usually -1) otherwise.
> +
> =item $st->add_callback($events, $coderef)
>
> Register a callback to be invoked whenever the stream has
> diff --git a/t/030-api-coverage.t b/t/030-api-coverage.t
> index 6a281ba..95bbd11 100644
> --- a/t/030-api-coverage.t
> +++ b/t/030-api-coverage.t
> @@ -116,6 +116,8 @@ virStreamEventCallback
> virStreamSinkFunc
> virStreamSinkHoleFunc
> virStreamSourceFunc
> +virStreamSourceHoleFunc
> +virStreamSourceSkipFunc
>
> virConnectCloseFunc
>
> --
> 2.13.0
>
> --
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Regards,
Daniel
--
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