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RingBuffer has const size, so use template.

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This eliminates division.
This commit is contained in:
Bartosz Taudul
2020-08-15 02:43:18 +02:00
parent caa1b1a792
commit 28aae73f74
2 changed files with 17 additions and 16 deletions
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client/TracyRingBuffer.hpp
+9 -10
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@@ -1,17 +1,17 @@
namespace tracy
{
template<size_t Size>
class RingBuffer
{
public:
RingBuffer( uint32_t size, int fd )
: m_size( size )
, m_fd( fd )
RingBuffer( int fd )
: m_fd( fd )
{
const auto pageSize = uint32_t( getpagesize() );
assert( size >= pageSize );
assert( __builtin_popcount( size ) == 1 );
m_mapSize = size + pageSize;
assert( Size >= pageSize );
assert( __builtin_popcount( Size ) == 1 );
m_mapSize = Size + pageSize;
m_mapAddr = mmap( nullptr, m_mapSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
if( !m_mapAddr )
{
@@ -63,14 +63,14 @@ public:
void Read( void* dst, uint64_t offset, uint64_t cnt )
{
auto src = ( m_metadata->data_tail + offset ) % m_size;
if( src + cnt <= m_size )
auto src = ( m_metadata->data_tail + offset ) % Size;
if( src + cnt <= Size )
{
memcpy( dst, m_buffer + src, cnt );
}
else
{
const auto s0 = m_size - src;
const auto s0 = Size - src;
memcpy( dst, m_buffer + src, s0 );
memcpy( (char*)dst + s0, m_buffer, cnt - s0 );
}
@@ -106,7 +106,6 @@ private:
std::atomic_store_explicit( (volatile std::atomic<uint64_t>*)&m_metadata->data_tail, tail, std::memory_order_release );
}
size_t m_size;
size_t m_mapSize;
void* m_mapAddr;