tracy/common/TracyProtocol.hpp
Bartosz Taudul 3b03e849f0 Harden client code against unaligned memory access.
There shouldn't be any changes in generated code on modern
architectures, as the memcpy will be reduced to a store/load operation
identical to the one generated with plain struct member access.

GetTime( cpu ) needs special handling, as the MSVC intrinsic for rdtscp
can't store cpu identifier in a register. Using intermediate variable
would cause store to stack, read from stack, store to the destination
address. Since rdtscp is only available on x86, which handles unaligned
stores without any problems, we can have one place with direct struct
member access.
2018-03-31 14:15:04 +02:00

48 lines
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C++

#ifndef __TRACYPROTOCOL_HPP__
#define __TRACYPROTOCOL_HPP__
#include <limits>
#include <stdint.h>
#include "../common/tracy_lz4.hpp"
namespace tracy
{
using lz4sz_t = uint32_t;
enum { TargetFrameSize = 256 * 1024 };
enum { LZ4Size = LZ4_COMPRESSBOUND( TargetFrameSize ) };
static_assert( LZ4Size <= std::numeric_limits<lz4sz_t>::max(), "LZ4Size greater than lz4sz_t" );
static_assert( TargetFrameSize * 2 >= 64 * 1024, "Not enough space for LZ4 stream buffer" );
enum ServerQuery : uint8_t
{
ServerQueryTerminate,
ServerQueryString,
ServerQueryThreadString,
ServerQuerySourceLocation,
ServerQueryPlotName,
};
enum { WelcomeMessageProgramNameSize = 64 };
#pragma pack( 1 )
struct WelcomeMessage
{
double timerMul;
int64_t initBegin;
int64_t initEnd;
uint64_t delay;
uint64_t resolution;
uint64_t epoch;
char programName[WelcomeMessageProgramNameSize];
};
#pragma pack()
enum { WelcomeMessageSize = sizeof( WelcomeMessage ) };
}
#endif