mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-27 14:20:34 +05:00
389 lines
9.1 KiB
C++
389 lines
9.1 KiB
C++
#ifndef NETGEN_CORE_UTILS_HPP
|
|
#define NETGEN_CORE_UTILS_HPP
|
|
|
|
#include <atomic>
|
|
#include <chrono>
|
|
#include <filesystem>
|
|
#include <map>
|
|
#include <ostream>
|
|
#include <optional>
|
|
#include <sstream>
|
|
#include <string>
|
|
|
|
#include "ngcore_api.hpp" // for NGCORE_API and CPU arch macros
|
|
|
|
#if defined(__APPLE__) && defined(NETGEN_ARCH_ARM64)
|
|
#include <mach/mach_time.h>
|
|
#endif
|
|
|
|
#ifdef NETGEN_ARCH_AMD64
|
|
#ifdef WIN32
|
|
#include <intrin.h> // for __rdtsc() CPU time step counter
|
|
#else
|
|
#include <x86intrin.h> // for __rdtsc() CPU time step counter
|
|
#endif // WIN32
|
|
#endif // NETGEN_ARCH_AMD64
|
|
|
|
namespace ngcore
|
|
{
|
|
// MPI rank, nranks TODO: Rename
|
|
// [[deprecated("don't use global id/ntasks")]]
|
|
extern NGCORE_API int id;
|
|
// [[deprecated("don't use global id/ntasks")]]
|
|
extern NGCORE_API int ntasks;
|
|
|
|
NGCORE_API std::string Demangle(const char* typeinfo);
|
|
|
|
template<typename T>
|
|
std::string GetName(const T& obj)
|
|
{ return Demangle(typeid(obj).name()); }
|
|
|
|
#if defined(__GNUC__)
|
|
inline bool likely (bool x) { return bool(__builtin_expect(long(x), 1L)); }
|
|
inline bool unlikely (bool x) { return bool(__builtin_expect(long(x), 0L)); }
|
|
#else
|
|
inline bool likely (bool x) { return x; }
|
|
inline bool unlikely (bool x) { return x; }
|
|
#endif
|
|
|
|
using TClock = std::chrono::system_clock;
|
|
extern NGCORE_API const std::chrono::time_point<TClock> wall_time_start;
|
|
|
|
// Time in seconds since program start
|
|
inline double WallTime () noexcept
|
|
{
|
|
std::chrono::time_point<TClock> now = TClock::now();
|
|
std::chrono::duration<double> elapsed_seconds = now-wall_time_start;
|
|
return elapsed_seconds.count();
|
|
}
|
|
|
|
// High precision clock counter register
|
|
using TTimePoint = size_t;
|
|
extern NGCORE_API double seconds_per_tick;
|
|
|
|
inline TTimePoint GetTimeCounter() noexcept
|
|
{
|
|
#if defined(__APPLE__) && defined(NETGEN_ARCH_ARM64)
|
|
return mach_absolute_time();
|
|
#elif defined(NETGEN_ARCH_AMD64)
|
|
return __rdtsc();
|
|
#elif defined(NETGEN_ARCH_ARM64) && defined(__GNUC__)
|
|
// __GNUC__ is also defined by CLANG. Use inline asm to read Generic Timer
|
|
unsigned long long tics;
|
|
__asm __volatile("mrs %0, CNTVCT_EL0" : "=&r" (tics));
|
|
return tics;
|
|
#elif defined(__EMSCRIPTEN__)
|
|
return std::chrono::high_resolution_clock::now().time_since_epoch().count();
|
|
#else
|
|
#warning "Unsupported CPU architecture"
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
template <class T>
|
|
inline std::string ToString (const T& t)
|
|
{
|
|
std::stringstream ss;
|
|
ss << t;
|
|
return ss.str();
|
|
}
|
|
|
|
inline std::string ToLower( const std::string & s )
|
|
{
|
|
std::string res;
|
|
res.reserve(s.size());
|
|
|
|
for(auto & c : s)
|
|
res.push_back(tolower(c));
|
|
|
|
return res;
|
|
}
|
|
|
|
inline std::string ToLower( const std::filesystem::path & p )
|
|
{
|
|
return ToLower(p.string());
|
|
}
|
|
|
|
|
|
|
|
template <class T>
|
|
void SaveBin (std::ostream & ost, const T & val)
|
|
{
|
|
const char * cp = reinterpret_cast<const char*> (&val);
|
|
for (unsigned j = 0; j < sizeof(T); j++)
|
|
ost.put(cp[j]);
|
|
}
|
|
|
|
|
|
template <class T>
|
|
void LoadBin (std::istream & ist, T & val)
|
|
{
|
|
char * cp = reinterpret_cast<char*> (&val);
|
|
for (unsigned j = 0; j < sizeof(T); j++)
|
|
ist.get(cp[j]);
|
|
}
|
|
|
|
|
|
template<typename T1, typename T2>
|
|
std::ostream& operator << (std::ostream& ost, const std::map<T1,T2>& map)
|
|
{
|
|
for(auto& val : map)
|
|
ost << "\n" << val.first << ": " << val.second;
|
|
return ost;
|
|
}
|
|
|
|
template <class T>
|
|
NETGEN_INLINE void Swap (T & a, T & b)
|
|
{
|
|
T temp = std::move(a);
|
|
a = std::move(b);
|
|
b = std::move(temp);
|
|
}
|
|
|
|
|
|
/// min of 2 values
|
|
template <class T>
|
|
NETGEN_INLINE T min2 (T a, T b)
|
|
{
|
|
return (a < b) ? a : b;
|
|
}
|
|
|
|
/// max of 2 values
|
|
template <class T>
|
|
NETGEN_INLINE T max2 (T a, T b)
|
|
{
|
|
return (a > b) ? a : b;
|
|
}
|
|
|
|
/// min of 3 values
|
|
template <class T>
|
|
NETGEN_INLINE T min3 (T a, T b, T c)
|
|
{
|
|
return (a < b) ? (a < c) ? a : c
|
|
: (b < c) ? b : c;
|
|
}
|
|
|
|
/// max of 3 values
|
|
template <class T>
|
|
NETGEN_INLINE T max3 (T a, T b, T c)
|
|
{
|
|
///
|
|
return (a > b) ? ((a > c) ? a : c)
|
|
: ((b > c) ? b : c);
|
|
}
|
|
|
|
|
|
/// sign of value (+1, 0, -1)
|
|
template <class T>
|
|
NETGEN_INLINE int sgn (T a)
|
|
{
|
|
return (a > 0) ? 1 : ( ( a < 0) ? -1 : 0 );
|
|
}
|
|
|
|
/// square element
|
|
template <class T>
|
|
NETGEN_INLINE T sqr (const T a)
|
|
{
|
|
return a * a;
|
|
}
|
|
|
|
/// element to the third power
|
|
template <class T>
|
|
NETGEN_INLINE T pow3 (const T a)
|
|
{
|
|
return a * a * a;
|
|
}
|
|
|
|
|
|
|
|
NETGEN_INLINE double IfPos (double a, double b, double c) { return a>0 ? b : c; }
|
|
NETGEN_INLINE double IfZero (double a, double b, double c) { return a==0. ? b : c; }
|
|
|
|
// checks if string starts with sequence
|
|
inline bool StartsWith(const std::string& str, const std::string& start)
|
|
{
|
|
if(start.size() > str.size())
|
|
return false;
|
|
return std::equal(start.begin(), start.end(), str.begin());
|
|
}
|
|
|
|
// checks if string ends with sequence
|
|
inline bool EndsWith(const std::string& str, const std::string& end)
|
|
{
|
|
if(end.size() > str.size())
|
|
return false;
|
|
return std::equal(end.rbegin(), end.rend(), str.rbegin());
|
|
}
|
|
|
|
template<typename T>
|
|
NETGEN_INLINE std::atomic<T> & AsAtomic (T & d)
|
|
{
|
|
return reinterpret_cast<std::atomic<T>&> (d);
|
|
}
|
|
|
|
NETGEN_INLINE double AtomicAdd( double & sum, double val )
|
|
{
|
|
std::atomic<double> & asum = AsAtomic(sum);
|
|
double current = asum.load();
|
|
while (!asum.compare_exchange_weak(current, current + val))
|
|
;
|
|
return current;
|
|
}
|
|
|
|
template<typename T>
|
|
NETGEN_INLINE T AtomicMin( T & minval, T val )
|
|
{
|
|
std::atomic<T> & aminval = AsAtomic(minval);
|
|
T current = aminval.load();
|
|
while (!aminval.compare_exchange_weak(current, std::min(current, val)))
|
|
;
|
|
return current;
|
|
}
|
|
|
|
template<typename T>
|
|
NETGEN_INLINE T AtomicMax( T & maxval, T val )
|
|
{
|
|
std::atomic<T> & amaxval = AsAtomic(maxval);
|
|
T current = amaxval.load();
|
|
while (!amaxval.compare_exchange_weak(current, std::max(current, val)))
|
|
;
|
|
return current;
|
|
}
|
|
|
|
|
|
|
|
|
|
template <int N> using IC = std::integral_constant<int,N>; // needed for Iterate
|
|
|
|
|
|
namespace detail {
|
|
template <typename T, typename Enable = int>
|
|
struct IsIC_trait {
|
|
static constexpr auto check() { return false; }
|
|
};
|
|
|
|
template <typename T>
|
|
struct IsIC_trait<T, std::enable_if_t<std::is_same_v<T, IC<T::value>> == true, int> > {
|
|
static constexpr auto check() { return true; }
|
|
};
|
|
}
|
|
|
|
template <typename T>
|
|
constexpr bool is_IC() {
|
|
return detail::IsIC_trait<T>::check();
|
|
}
|
|
|
|
|
|
|
|
|
|
template <int NUM, typename FUNC>
|
|
NETGEN_INLINE void Iterate (FUNC f)
|
|
{
|
|
if constexpr (NUM > 1) Iterate<NUM-1> (f);
|
|
if constexpr (NUM >= 1) f(IC<NUM-1>());
|
|
}
|
|
|
|
|
|
template <int NUM, typename FUNC>
|
|
NETGEN_INLINE void Switch (size_t nr, FUNC f)
|
|
{
|
|
if (NUM-1 == nr) f(IC<NUM-1>());
|
|
if constexpr (NUM > 1) Switch<NUM-1> (nr, f);
|
|
}
|
|
|
|
|
|
|
|
namespace detail
|
|
{
|
|
template<typename T>
|
|
struct IndexTypeHelper
|
|
{
|
|
private:
|
|
template<typename T2>
|
|
static constexpr auto check(T2* t) -> typename T2::index_type { return *t; }
|
|
static constexpr size_t check(...);
|
|
|
|
public:
|
|
using type = decltype(check((T*) nullptr)); // NOLINT
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
// Get index type of object. If object has a typedef index_type it is this type, else size_t
|
|
template<typename T>
|
|
using index_type = typename detail::IndexTypeHelper<T>::type;
|
|
|
|
class MyMutex
|
|
{
|
|
std::atomic<bool> m;
|
|
public:
|
|
MyMutex() { m.store(false, std::memory_order_relaxed); }
|
|
void lock()
|
|
{
|
|
bool should = false;
|
|
while (!m.compare_exchange_weak(should, true))
|
|
{
|
|
should = false;
|
|
#ifdef NETGEN_ARCH_AMD64
|
|
_mm_pause();
|
|
#endif // NETGEN_ARCH_AMD64
|
|
}
|
|
}
|
|
void unlock()
|
|
{
|
|
m = false;
|
|
}
|
|
};
|
|
|
|
class MyLock
|
|
{
|
|
MyMutex & mutex;
|
|
public:
|
|
MyLock (MyMutex & amutex) : mutex(amutex) { mutex.lock(); }
|
|
~MyLock () { mutex.unlock(); }
|
|
};
|
|
|
|
NGCORE_API int GetCompiledSIMDSize();
|
|
NGCORE_API bool IsRangeCheckEnabled();
|
|
|
|
NGCORE_API std::filesystem::path GetTempFilename();
|
|
|
|
NGCORE_API void* GetRawSymbol( std::string func_name );
|
|
|
|
template <typename TFunc>
|
|
TFunc GetSymbol( std::string func_name )
|
|
{
|
|
return reinterpret_cast<TFunc>(GetRawSymbol(func_name));
|
|
}
|
|
|
|
// Class to handle/load shared libraries
|
|
class NGCORE_API SharedLibrary
|
|
{
|
|
std::filesystem::path lib_name;
|
|
std::optional<std::filesystem::path> directory_to_delete = std::nullopt;
|
|
void *lib = nullptr;
|
|
|
|
public:
|
|
SharedLibrary() = default;
|
|
SharedLibrary(const std::filesystem::path & lib_name_, std::optional<std::filesystem::path> directory_to_delete_ = std::nullopt, bool global = false );
|
|
|
|
SharedLibrary(const SharedLibrary &) = delete;
|
|
SharedLibrary & operator =(const SharedLibrary &) = delete;
|
|
|
|
~SharedLibrary();
|
|
|
|
template <typename TFunc>
|
|
TFunc GetSymbol( std::string func_name )
|
|
{
|
|
return reinterpret_cast<TFunc>(GetRawSymbol(func_name));
|
|
}
|
|
|
|
void Load( const std::filesystem::path & lib_name_, bool global = true);
|
|
void Unload();
|
|
void* GetRawSymbol( std::string func_name );
|
|
};
|
|
|
|
} // namespace ngcore
|
|
|
|
#endif // NETGEN_CORE_UTILS_HPP
|