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Clean up this allocation junk

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This commit is contained in:
Chris Marsh 2017-07-25 09:06:48 -07:00
parent 38c0599380
commit 866e6d1104
3 changed files with 17 additions and 11 deletions
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6
src/discord-rpc.cpp
View file

@ -83,12 +83,8 @@ extern "C" void Discord_UpdateConnection()
else {
// reads
// json parser will use this buffer first, then allocate more if needed; I seriously doubt we send any messages that would use all of this, though.
char parseBuffer[32 * 1024];
for (;;) {
PoolAllocator pa(parseBuffer, sizeof(parseBuffer));
StackAllocator sa;
JsonDocument message(rapidjson::kObjectType, &pa, sizeof(sa.fixedBuffer_), &sa);
JsonDocument message;
if (!Connection->Read(message)) {
break;

5
src/rpc_connection.cpp
View file

@ -34,10 +34,7 @@ void RpcConnection::Open()
}
if (state == State::SentHandshake) {
char parseBuffer[32 * 1024];
PoolAllocator pa(parseBuffer, sizeof(parseBuffer));
StackAllocator sa;
JsonDocument message(rapidjson::kObjectType, &pa, sizeof(sa.fixedBuffer_), &sa);
JsonDocument message;
if (Read(message)) {
auto cmd = message.FindMember("cmd");
if (cmd == message.MemberEnd() || !cmd->value.IsString()) {

17
src/serialization.h
View file

@ -99,11 +99,24 @@ public:
};
using MallocAllocator = rapidjson::CrtAllocator;
extern MallocAllocator MallocAllocatorInst;
using PoolAllocator = rapidjson::MemoryPoolAllocator<MallocAllocator>;
using UTF8 = rapidjson::UTF8<char>;
// Writer appears to need about 16 bytes per nested object level (with 64bit size_t)
using StackAllocator = FixedLinearAllocator<2048>;
constexpr size_t WriterNestingLevels = 2048 / (2 * sizeof(size_t));
using JsonWriter = rapidjson::Writer<DirectStringBuffer, UTF8, UTF8, StackAllocator, rapidjson::kWriteNoFlags>;
using JsonDocument = rapidjson::GenericDocument<UTF8, PoolAllocator, FixedLinearAllocator<2048>>;
using JsonDocumentBase = rapidjson::GenericDocument<UTF8, PoolAllocator, StackAllocator>;
class JsonDocument : public JsonDocumentBase
{
public:
static const int kDefaultChunkCapacity = 32 * 1024;
// json parser will use this buffer first, then allocate more if needed; I seriously doubt we send any messages that would use all of this, though.
char parseBuffer_[32 * 1024];
MallocAllocator mallocAllocator_;
PoolAllocator poolAllocator_;
StackAllocator stackAllocator_;
JsonDocument() : JsonDocumentBase(rapidjson::kObjectType, &poolAllocator_, sizeof(stackAllocator_.fixedBuffer_), &stackAllocator_)
, poolAllocator_(parseBuffer_, sizeof(parseBuffer_), kDefaultChunkCapacity, &mallocAllocator_)
, stackAllocator_()
{}
};