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STVar: optimized storage for STObject (RIPD-825):

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This introduces the STVar container, capable of holding any STBase-derived
class and implementing a "small string" optimization. STObject is changed
to store std::vector<STVar> instead of boost::ptr_vector<STBase>. This
eliminates a significant number of needless dynamic memory allocations and
deallocations during transaction processing when ledger entries are
deserialized. It comes at the expense of larger overall storage requirements
for STObject.
This commit is contained in:
Vinnie Falco
2015-03-19 16:17:35 -07:00
parent 4c5308da8d
commit 99c2fac143
30 changed files with 956 additions and 748 deletions
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183
src/ripple/protocol/impl/STVar.cpp Normal file
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//------------------------------------------------------------------------------
/*
This file is part of rippled: https://github.com/ripple/rippled
Copyright (c) 2012, 2013 Ripple Labs Inc.
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include <ripple/protocol/STAccount.h>
#include <ripple/protocol/STAmount.h>
#include <ripple/protocol/STArray.h>
#include <ripple/protocol/STBase.h>
#include <ripple/protocol/STBitString.h>
#include <ripple/protocol/STBlob.h>
#include <ripple/protocol/STInteger.h>
#include <ripple/protocol/STObject.h>
#include <ripple/protocol/STPathSet.h>
#include <ripple/protocol/STVector256.h>
#include <ripple/protocol/impl/STVar.h>
namespace ripple {
namespace detail {
defaultObject_t defaultObject;
nonPresentObject_t nonPresentObject;
//------------------------------------------------------------------------------
STVar::Log::~Log()
{
beast::debug_ostream os;
for(auto const& e : map_)
os << e.first << "," << e.second;
}
void
STVar::Log::operator() (std::size_t n)
{
std::lock_guard<std::mutex> lock(mutex_);
auto const result = map_.emplace(n, 1);
if (! result.second)
++result.first->second;
}
//------------------------------------------------------------------------------
STVar::~STVar()
{
destroy();
}
STVar::STVar (STVar const& other)
: p_(nullptr)
{
if (other.p_ != nullptr)
p_ = other.p_->copy(
sizeof(d_), &d_);
}
STVar::STVar (STVar&& other)
{
if (other.on_heap())
{
p_ = other.p_;
other.p_ = nullptr;
}
else
{
p_ = other.p_->move(
sizeof(d_), &d_);
}
}
STVar&
STVar::operator= (STVar const& rhs)
{
destroy();
p_ = nullptr;
if (rhs.p_)
p_ = rhs.p_->copy(
sizeof(d_), &d_);
return *this;
}
STVar&
STVar::operator= (STVar&& rhs)
{
destroy();
if (rhs.on_heap())
{
p_ = rhs.p_;
rhs.p_ = nullptr;
}
else
{
p_ = nullptr;
p_ = rhs.p_->move(
sizeof(d_), &d_);
}
return *this;
}
STVar::STVar (defaultObject_t, SField::ref name)
: STVar(name.fieldType, name)
{
}
STVar::STVar (nonPresentObject_t, SField::ref name)
: STVar(STI_NOTPRESENT, name)
{
}
STVar::STVar (SerialIter& sit, SField::ref name)
{
switch (name.fieldType)
{
case STI_NOTPRESENT: construct<STBase>(name); return;
case STI_UINT8: construct<STUInt8>(sit, name); return;
case STI_UINT16: construct<STUInt16>(sit, name); return;
case STI_UINT32: construct<STUInt32>(sit, name); return;
case STI_UINT64: construct<STUInt64>(sit, name); return;
case STI_AMOUNT: construct<STAmount>(sit, name); return;
case STI_HASH128: construct<STHash128>(sit, name); return;
case STI_HASH160: construct<STHash160>(sit, name); return;
case STI_HASH256: construct<STHash256>(sit, name); return;
case STI_VECTOR256: construct<STVector256>(sit, name); return;
case STI_VL: construct<STBlob>(sit, name); return;
case STI_ACCOUNT: construct<STAccount>(sit, name); return;
case STI_PATHSET: construct<STPathSet>(sit, name); return;
case STI_OBJECT: construct<STObject>(sit, name); return;
case STI_ARRAY: construct<STArray>(sit, name); return;
default:
throw std::runtime_error ("Unknown object type");
}
}
STVar::STVar (SerializedTypeID id, SField::ref name)
{
assert ((id == STI_NOTPRESENT) || (id == name.fieldType));
switch (id)
{
case STI_NOTPRESENT: construct<STBase>(name); return;
case STI_UINT8: construct<STUInt8>(name); return;
case STI_UINT16: construct<STUInt16>(name); return;
case STI_UINT32: construct<STUInt32>(name); return;
case STI_UINT64: construct<STUInt64>(name); return;
case STI_AMOUNT: construct<STAmount>(name); return;
case STI_HASH128: construct<STHash128>(name); return;
case STI_HASH160: construct<STHash160>(name); return;
case STI_HASH256: construct<STHash256>(name); return;
case STI_VECTOR256: construct<STVector256>(name); return;
case STI_VL: construct<STBlob>(name); return;
case STI_ACCOUNT: construct<STAccount>(name); return;
case STI_PATHSET: construct<STPathSet>(name); return;
case STI_OBJECT: construct<STObject>(name); return;
case STI_ARRAY: construct<STArray>(name); return;
default:
throw std::runtime_error ("Unknown object type");
}
}
void
STVar::destroy()
{
if (on_heap())
delete p_;
else
p_->~STBase();
}
} // detail
} // ripple