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premiere-libtorrent
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move stack allocator implementation into its own cpp file

This commit is contained in:
arvidn 2017-07-23 08:13:07 -07:00 committed by Arvid Norberg
parent 330904f460
commit c167e28788
5 changed files with 138 additions and 84 deletions
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1
CMakeLists.txt
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@ -126,6 +126,7 @@ set(sources
ffs
add_torrent_params
peer_info
stack_allocator
# -- extensions --
ut_pex

1
Jamfile
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@ -679,6 +679,7 @@ SOURCES =
ffs
add_torrent_params
peer_info
stack_allocator
# -- extensions --
ut_pex

94
include/libtorrent/stack_allocator.hpp
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@ -60,7 +60,7 @@ namespace libtorrent { namespace aux {
int m_idx;
};
struct stack_allocator
struct TORRENT_EXTRA_EXPORT stack_allocator
{
stack_allocator() {}
@ -68,91 +68,17 @@ namespace libtorrent { namespace aux {
stack_allocator(stack_allocator const&) = delete;
stack_allocator& operator=(stack_allocator const&) = delete;
allocation_slot copy_string(string_view str)
{
int const ret = int(m_storage.size());
m_storage.resize(ret + numeric_cast<int>(str.size()) + 1);
std::memcpy(&m_storage[ret], str.data(), str.size());
m_storage[ret + int(str.length())] = '\0';
return allocation_slot(ret);
}
allocation_slot copy_string(string_view str);
allocation_slot copy_string(char const* str);
allocation_slot copy_string(char const* str)
{
int const ret = int(m_storage.size());
int const len = int(std::strlen(str));
m_storage.resize(ret + len + 1);
std::memcpy(&m_storage[ret], str, numeric_cast<std::size_t>(len));
m_storage[ret + len] = '\0';
return allocation_slot(ret);
}
allocation_slot format_string(char const* fmt, va_list v);
allocation_slot format_string(char const* fmt, va_list v)
{
int const ret = int(m_storage.size());
m_storage.resize(ret + 512);
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
int const len = std::vsnprintf(m_storage.data() + ret, 512, fmt, v);
#ifdef __clang__
#pragma clang diagnostic pop
#endif
if (len < 0)
{
m_storage.resize(ret);
return copy_string("(format error)");
}
// +1 is to include the 0-terminator
m_storage.resize(ret + (len > 512 ? 512 : len) + 1);
return allocation_slot(ret);
}
allocation_slot copy_buffer(span<char const> buf)
{
int const ret = int(m_storage.size());
int const size = int(buf.size());
if (size < 1) return allocation_slot();
m_storage.resize(ret + size);
std::memcpy(&m_storage[ret], buf.data(), numeric_cast<std::size_t>(size));
return allocation_slot(ret);
}
allocation_slot allocate(int const bytes)
{
if (bytes < 1) return allocation_slot();
int const ret = m_storage.end_index();
m_storage.resize(ret + bytes);
return allocation_slot(ret);
}
char* ptr(allocation_slot const idx)
{
if(idx.val() < 0) return nullptr;
TORRENT_ASSERT(idx.val() < int(m_storage.size()));
return &m_storage[idx.val()];
}
char const* ptr(allocation_slot const idx) const
{
if(idx.val() < 0) return nullptr;
TORRENT_ASSERT(idx.val() < int(m_storage.size()));
return &m_storage[idx.val()];
}
void swap(stack_allocator& rhs)
{
m_storage.swap(rhs.m_storage);
}
void reset()
{
m_storage.clear();
}
allocation_slot copy_buffer(span<char const> buf);
allocation_slot allocate(int bytes);
char* ptr(allocation_slot idx);
char const* ptr(allocation_slot idx) const;
void swap(stack_allocator& rhs);
void reset();
private:

1
src/Makefile.am
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@ -164,6 +164,7 @@ libtorrent_rasterbar_la_SOURCES = \
ffs.cpp \
add_torrent_params.cpp \
peer_info.cpp \
stack_allocator.cpp \
\
$(KADEMLIA_SOURCES) \
\

125
src/stack_allocator.cpp Normal file
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@ -0,0 +1,125 @@
/*
Copyright (c) 2015-2016, Arvid Norberg
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#include "libtorrent/stack_allocator.hpp"
namespace libtorrent {
namespace aux {
allocation_slot stack_allocator::copy_string(string_view str)
{
int const ret = int(m_storage.size());
m_storage.resize(ret + numeric_cast<int>(str.size()) + 1);
std::memcpy(&m_storage[ret], str.data(), str.size());
m_storage[ret + int(str.length())] = '\0';
return allocation_slot(ret);
}
allocation_slot stack_allocator::copy_string(char const* str)
{
int const ret = int(m_storage.size());
int const len = int(std::strlen(str));
m_storage.resize(ret + len + 1);
std::memcpy(&m_storage[ret], str, numeric_cast<std::size_t>(len));
m_storage[ret + len] = '\0';
return allocation_slot(ret);
}
allocation_slot stack_allocator::format_string(char const* fmt, va_list v)
{
int const ret = int(m_storage.size());
m_storage.resize(ret + 512);
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
int const len = std::vsnprintf(m_storage.data() + ret, 512, fmt, v);
#ifdef __clang__
#pragma clang diagnostic pop
#endif
if (len < 0)
{
m_storage.resize(ret);
return copy_string("(format error)");
}
// +1 is to include the 0-terminator
m_storage.resize(ret + (len > 512 ? 512 : len) + 1);
return allocation_slot(ret);
}
allocation_slot stack_allocator::copy_buffer(span<char const> buf)
{
int const ret = int(m_storage.size());
int const size = int(buf.size());
if (size < 1) return allocation_slot();
m_storage.resize(ret + size);
std::memcpy(&m_storage[ret], buf.data(), numeric_cast<std::size_t>(size));
return allocation_slot(ret);
}
allocation_slot stack_allocator::allocate(int const bytes)
{
if (bytes < 1) return allocation_slot();
int const ret = m_storage.end_index();
m_storage.resize(ret + bytes);
return allocation_slot(ret);
}
char* stack_allocator::ptr(allocation_slot const idx)
{
if(idx.val() < 0) return nullptr;
TORRENT_ASSERT(idx.val() < int(m_storage.size()));
return &m_storage[idx.val()];
}
char const* stack_allocator::ptr(allocation_slot const idx) const
{
if(idx.val() < 0) return nullptr;
TORRENT_ASSERT(idx.val() < int(m_storage.size()));
return &m_storage[idx.val()];
}
void stack_allocator::swap(stack_allocator& rhs)
{
m_storage.swap(rhs.m_storage);
}
void stack_allocator::reset()
{
m_storage.clear();
}
}
}