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Fast read path.

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This commit is contained in:
Bartosz Taudul 2017-10-01 01:59:07 +02:00
parent 8f862b3271
commit 7e0eac78e1
1 changed files with 24 additions and 16 deletions
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40
server/TracyFileRead.hpp
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@ -26,25 +26,33 @@ public:
void Read( void* ptr, size_t size )
{
auto dst = (char*)ptr;
while( size > 0 )
if( size <= BufSize - m_offset )
{
if( m_offset == BufSize )
memcpy( ptr, m_buf[m_active] + m_offset, size );
m_offset += size;
}
else
{
auto dst = (char*)ptr;
while( size > 0 )
{
m_active = 1 - m_active;
m_offset = 0;
uint32_t sz;
fread( &sz, 1, sizeof( sz ), m_file );
char lz4[LZ4Size];
fread( lz4, 1, sz, m_file );
LZ4_decompress_safe_continue( m_stream, lz4, m_buf[m_active], sz, BufSize );
}
if( m_offset == BufSize )
{
m_active = 1 - m_active;
m_offset = 0;
uint32_t sz;
fread( &sz, 1, sizeof( sz ), m_file );
char lz4[LZ4Size];
fread( lz4, 1, sz, m_file );
LZ4_decompress_safe_continue( m_stream, lz4, m_buf[m_active], sz, BufSize );
}
const auto sz = std::min( size, BufSize - m_offset );
memcpy( dst, m_buf[m_active] + m_offset, sz );
m_offset += sz;
dst += sz;
size -= sz;
const auto sz = std::min( size, BufSize - m_offset );
memcpy( dst, m_buf[m_active] + m_offset, sz );
m_offset += sz;
dst += sz;
size -= sz;
}
}
}