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Less direct Buf access in BufAccessor

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Summary:
**Context**
The `BufAccessor` is used to access a contiguous section of memory. Right now, it works with a `Buf` under the hood.

**Overall plan**
The plan is to change the `BufAccessor` to use a `uint8_t*` instead. Since we're using section of contiguous memory, there's no need to use a chained buffer abstraction here. This'll move us closer to deprecating the usage `folly::IOBuf`.

**What this diff is doing**
Most use cases of the `BufAccessor` look like the following:
```
auto buf = bufAccessor.obtain();
// Do something with buf, like calling trimEnd
bufAccessor.release(buf)
```
I'm adding APIs to the `BufAccessor` so that there's no need to `obtain()` and `release()` the `Buf`. We'd instead just call an API on the `BufAccessor`, which would call that same API on the underlying `folly::IOBuf`. Later on, we'll change the `BufAccessor` to use a `uint8_t*` under the hood.

I'm currently leaving in the `obtain()`, `release()`, and `buf()` APIs because Fizz and the AsyncUDPSocket expect `folly::IOBuf` as inputs in many of their APIs. Once those callsites are migrated off `folly::IOBuf`, we can remove these APIs.

Reviewed By: mjoras

Differential Revision: D60973166

fbshipit-source-id: 52aa3541d0c4878c7ee8525d70ac280508b61e24
This commit is contained in:
Aman Sharma
2024-08-09 14:35:39 -07:00
committed by Facebook GitHub Bot
parent 9216eed3d8
commit a84708be4b
16 changed files with 166 additions and 133 deletions
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19
quic/api/test/QuicBatchWriterTest.cpp
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@@ -350,7 +350,7 @@ TEST_F(QuicBatchWriterTest, InplaceWriterNeedsFlush) {
gsoSupported_ = true;
uint32_t batchSize = 20;
auto bufAccessor =
std::make_unique<SimpleBufAccessor>(conn_.udpSendPacketLen * batchSize);
std::make_unique<BufAccessor>(conn_.udpSendPacketLen * batchSize);
conn_.bufAccessor = bufAccessor.get();
auto batchWriter = quic::BatchWriterFactory::makeBatchWriter(
quic::QuicBatchingMode::BATCHING_MODE_GSO,
@@ -373,7 +373,7 @@ TEST_F(QuicBatchWriterTest, InplaceWriterAppendLimit) {
gsoSupported_ = true;
uint32_t batchSize = 20;
auto bufAccessor =
std::make_unique<SimpleBufAccessor>(conn_.udpSendPacketLen * batchSize);
std::make_unique<BufAccessor>(conn_.udpSendPacketLen * batchSize);
conn_.bufAccessor = bufAccessor.get();
auto batchWriter = quic::BatchWriterFactory::makeBatchWriter(
quic::QuicBatchingMode::BATCHING_MODE_GSO,
@@ -404,7 +404,7 @@ TEST_F(QuicBatchWriterTest, InplaceWriterAppendSmaller) {
gsoSupported_ = true;
uint32_t batchSize = 20;
auto bufAccessor =
std::make_unique<SimpleBufAccessor>(conn_.udpSendPacketLen * batchSize);
std::make_unique<BufAccessor>(conn_.udpSendPacketLen * batchSize);
conn_.bufAccessor = bufAccessor.get();
auto batchWriter = quic::BatchWriterFactory::makeBatchWriter(
quic::QuicBatchingMode::BATCHING_MODE_GSO,
@@ -438,7 +438,7 @@ TEST_F(QuicBatchWriterTest, InplaceWriterWriteAll) {
quic::test::MockAsyncUDPSocket sock(qEvb);
uint32_t batchSize = 20;
auto bufAccessor =
std::make_unique<SimpleBufAccessor>(conn_.udpSendPacketLen * batchSize);
std::make_unique<BufAccessor>(conn_.udpSendPacketLen * batchSize);
conn_.bufAccessor = bufAccessor.get();
gsoSupported_ = true;
auto batchWriter = quic::BatchWriterFactory::makeBatchWriter(
@@ -487,7 +487,7 @@ TEST_F(QuicBatchWriterTest, InplaceWriterWriteOne) {
quic::test::MockAsyncUDPSocket sock(qEvb);
uint32_t batchSize = 20;
auto bufAccessor =
std::make_unique<SimpleBufAccessor>(conn_.udpSendPacketLen * batchSize);
std::make_unique<BufAccessor>(conn_.udpSendPacketLen * batchSize);
conn_.bufAccessor = bufAccessor.get();
gsoSupported_ = true;
auto batchWriter = quic::BatchWriterFactory::makeBatchWriter(
@@ -528,7 +528,7 @@ TEST_F(QuicBatchWriterTest, InplaceWriterLastOneTooBig) {
quic::test::MockAsyncUDPSocket sock(qEvb);
uint32_t batchSize = 20;
auto bufAccessor =
std::make_unique<SimpleBufAccessor>(conn_.udpSendPacketLen * batchSize);
std::make_unique<BufAccessor>(conn_.udpSendPacketLen * batchSize);
conn_.bufAccessor = bufAccessor.get();
gsoSupported_ = true;
auto batchWriter = quic::BatchWriterFactory::makeBatchWriter(
@@ -576,7 +576,7 @@ TEST_F(QuicBatchWriterTest, InplaceWriterBufResidueCheck) {
uint32_t batchSize = 20;
auto bufAccessor =
std::make_unique<SimpleBufAccessor>(conn_.udpSendPacketLen * batchSize);
std::make_unique<BufAccessor>(conn_.udpSendPacketLen * batchSize);
conn_.bufAccessor = bufAccessor.get();
conn_.udpSendPacketLen = 1000;
auto batchWriter = quic::BatchWriterFactory::makeBatchWriter(
@@ -618,8 +618,7 @@ class SinglePacketInplaceBatchWriterTest : public ::testing::Test {
: conn_(FizzServerQuicHandshakeContext::Builder().build()) {}
void SetUp() override {
bufAccessor_ =
std::make_unique<quic::SimpleBufAccessor>(conn_.udpSendPacketLen);
bufAccessor_ = std::make_unique<quic::BufAccessor>(conn_.udpSendPacketLen);
conn_.bufAccessor = bufAccessor_.get();
}
@@ -641,7 +640,7 @@ class SinglePacketInplaceBatchWriterTest : public ::testing::Test {
}
protected:
std::unique_ptr<quic::SimpleBufAccessor> bufAccessor_;
std::unique_ptr<quic::BufAccessor> bufAccessor_;
QuicServerConnectionState conn_;
};