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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 ) void Read( void* ptr, size_t size )
{ {
auto dst = (char*)ptr; if( size <= BufSize - m_offset )
while( size > 0 )
{ {
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; if( m_offset == BufSize )
m_offset = 0; {
uint32_t sz; m_active = 1 - m_active;
fread( &sz, 1, sizeof( sz ), m_file ); m_offset = 0;
char lz4[LZ4Size]; uint32_t sz;
fread( lz4, 1, sz, m_file ); fread( &sz, 1, sizeof( sz ), m_file );
LZ4_decompress_safe_continue( m_stream, lz4, m_buf[m_active], sz, BufSize ); 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 ); const auto sz = std::min( size, BufSize - m_offset );
memcpy( dst, m_buf[m_active] + m_offset, sz ); memcpy( dst, m_buf[m_active] + m_offset, sz );
m_offset += sz; m_offset += sz;
dst += sz; dst += sz;
size -= sz; size -= sz;
}
} }
} }