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TS-4954: Use TSIOBufferCopy in the passthru example plugin. #1093

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Merged
jpeach merged 1 commit into from
Oct 11, 2016
Merged

TS-4954: Use TSIOBufferCopy in the passthru example plugin. #1093

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24 changes: 6 additions & 18 deletions example/passthru/passthru.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -97,29 +97,16 @@ struct PassthruIO {
this->vio = TSVConnWrite(vconn, contp, this->reader, INT64_MAX);
}

// Transfer data from this IO object to the target IO object.
// Transfer data from this IO object to the target IO object. We use
// TSIOBufferCopy to move the data without actually duplicating it.
int64_t
transfer_to(PassthruIO &to)
{
TSIOBufferBlock block;
int64_t consumed = 0;
int64_t avail = TSIOBufferReaderAvail(this->reader);

for (block = TSIOBufferReaderStart(this->reader); block; block = TSIOBufferBlockNext(block)) {
int64_t remain = 0;
const char *bytes;

bytes = TSIOBufferBlockReadStart(block, this->reader, &remain);
while (bytes && remain) {
int64_t nwritten;

nwritten = TSIOBufferWrite(to.iobuf, bytes, remain);
remain -= nwritten;
bytes += nwritten;
consumed += nwritten;
}
}

if (consumed) {
if (avail) {
consumed = TSIOBufferCopy(to.iobuf, this->reader, avail, 0 /* offset */);
TSIOBufferReaderConsume(this->reader, consumed);
}

Expand Down Expand Up @@ -268,6 +255,7 @@ PassthruSessionEvent(TSCont cont, TSEvent event, void *edata)

if (TSIOBufferReaderAvail(sp->server.readio.reader) > 0) {
sp->server.readio.transfer_to(sp->client.writeio);
TSVIOReenable(sp->client.writeio.vio);
}

TSVConnClose(sp->server.vconn);
Expand Down