20 template <
size_t Index>
struct IndexedWriter {
23 std::enable_if_t<(
Index <
24 std::tuple_size<std::remove_reference_t<Tuple>>::value),
26 static size_t write(support::endian::Writer &OS, Tuple &&T) {
27 OS.write(std::get<Index>(T));
33 std::enable_if_t<(
Index >=
34 std::tuple_size<std::remove_reference_t<Tuple>>::value),
36 static size_t write(support::endian::Writer &OS, Tuple &&) {
41 template <uint8_t
Kind,
class... Values>
42 Error writeMetadata(support::endian::Writer &OS, Values &&... Ds) {
45 uint8_t FirstByte = (
static_cast<uint8_t
>(
Kind) << 1) | uint8_t{0x01u};
46 auto T = std::make_tuple(std::forward<Values>(
std::move(Ds))...);
50 assert(Bytes <= 15 &&
"Must only ever write at most 16 byte metadata!");
52 for (; Bytes < 15; ++Bytes)
64 (
H.ConstantTSC ? 0x01 : 0x0) | (
H.NonstopTSC ? 0x02 : 0x0);
71 OS.write(
H.CycleFrequency);
74 OS.write(FreeFormBytes);
80 return writeMetadata<7u>(OS, R.size());
84 return writeMetadata<4u>(OS, R.seconds(), R.nanos());
88 return writeMetadata<2u>(OS, R.cpuid(), R.tsc());
92 return writeMetadata<3u>(OS, R.tsc());
96 if (
auto E = writeMetadata<5u>(OS, R.size(), R.tsc(), R.cpu()))
105 if (
auto E = writeMetadata<5u>(OS, R.size(), R.delta()))
114 if (
auto E = writeMetadata<8u>(OS, R.size(), R.delta(), R.eventType()))
123 return writeMetadata<6u>(OS, R.arg());
127 return writeMetadata<9u>(OS, R.pid());
131 return writeMetadata<0u>(OS, R.tid());
135 return writeMetadata<1u>(OS, 0);
141 TypeRecordFuncId <<= 3;
142 TypeRecordFuncId |=
static_cast<uint32_t>(R.recordType());
143 TypeRecordFuncId <<= 1;
144 TypeRecordFuncId &= ~
uint32_t{0x01};
145 OS.write(TypeRecordFuncId);