static void resetLogBuffer(/*out*/JSectHeader& h, AlignedBuilder& bb) {
bb.reset();
h.setSectionLen(0xffffffff); // total length, will fill in later
h.seqNumber = getLastDataFileFlushTime();
h.fileId = j.curFileId();
}
/** we will build an output buffer ourself and then use O_DIRECT
we could be in read lock for this
caller handles locking
@return partially populated sectheader and _ab set
*/
static void _PREPLOGBUFFER(JSectHeader& h, AlignedBuilder& bb) {
// Add the JSectHeader
// Invalidate the total length, we will fill it in later.
h.setSectionLen(0xffffffff);
h.seqNumber = getLastDataFileFlushTime();
h.fileId = j.curFileId();
// Ops other than basic writes (DurOp's) go first
const std::vector<std::shared_ptr<DurOp>>& durOps = commitJob.ops();
for (std::vector<std::shared_ptr<DurOp>>::const_iterator i = durOps.begin(); i != durOps.end();
i++) {
(*i)->serialize(bb);
}
// Write intents
const std::vector<WriteIntent>& intents = commitJob.getIntentsSorted();
if (!intents.empty()) {
prepBasicWrites(bb, intents);
}
}
