tbb_stddef.h

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/*
    Copyright (c) 2005-2020 Intel Corporation

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#ifndef __TBB_tbb_stddef_H
#define __TBB_tbb_stddef_H

// Marketing-driven product version
#define TBB_VERSION_MAJOR 2020
#define TBB_VERSION_MINOR 3

// Engineering-focused interface version
#define TBB_INTERFACE_VERSION 11103
#define TBB_INTERFACE_VERSION_MAJOR TBB_INTERFACE_VERSION/1000

// The oldest major interface version still supported
// To be used in SONAME, manifests, etc.
#define TBB_COMPATIBLE_INTERFACE_VERSION 2

#define __TBB_STRING_AUX(x) #x
#define __TBB_STRING(x) __TBB_STRING_AUX(x)

// We do not need defines below for resource processing on windows
#if !defined RC_INVOKED

// Define groups for Doxygen documentation
// Simple text that is displayed on the main page of Doxygen documentation.
// tbb_config.h should be included the first since it contains macro definitions used in other headers
#include "tbb_config.h"

#if _MSC_VER >=1400
    #define __TBB_EXPORTED_FUNC   __cdecl
    #define __TBB_EXPORTED_METHOD __thiscall
#else
    #define __TBB_EXPORTED_FUNC
    #define __TBB_EXPORTED_METHOD
#endif

#if __INTEL_COMPILER || _MSC_VER
#define __TBB_NOINLINE(decl) __declspec(noinline) decl
#elif __GNUC__
#define __TBB_NOINLINE(decl) decl __attribute__ ((noinline))
#else
#define __TBB_NOINLINE(decl) decl
#endif

#if __TBB_NOEXCEPT_PRESENT
#define __TBB_NOEXCEPT(expression) noexcept(expression)
#else
#define __TBB_NOEXCEPT(expression)
#endif

#include <cstddef>      /* Need size_t and ptrdiff_t */

#if _MSC_VER
    #define __TBB_tbb_windef_H
    #include "internal/_tbb_windef.h"
    #undef __TBB_tbb_windef_H
#endif
#if !defined(_MSC_VER) || _MSC_VER>=1600
    #include <stdint.h>
#endif

typedef void(*assertion_handler_type)( const char* filename, int line, const char* expression, const char * comment );

#if __TBBMALLOC_BUILD
namespace rml { namespace internal {
 #define __TBB_ASSERT_RELEASE(predicate,message) ((predicate)?((void)0) : rml::internal::assertion_failure(__FILE__,__LINE__,#predicate,message))
#else
namespace tbb {
 #define __TBB_ASSERT_RELEASE(predicate,message) ((predicate)?((void)0) : tbb::assertion_failure(__FILE__,__LINE__,#predicate,message))
#endif

    assertion_handler_type __TBB_EXPORTED_FUNC set_assertion_handler( assertion_handler_type new_handler );


    void __TBB_EXPORTED_FUNC assertion_failure( const char* filename, int line, const char* expression, const char* comment );

#if __TBBMALLOC_BUILD
}}  // namespace rml::internal
#else
} // namespace tbb
#endif

#if TBB_USE_ASSERT


    #define __TBB_ASSERT(predicate,message) __TBB_ASSERT_RELEASE(predicate,message)

    #define __TBB_ASSERT_EX __TBB_ASSERT

#else /* !TBB_USE_ASSERT */

    #define __TBB_ASSERT(predicate,comment) ((void)0)
    #define __TBB_ASSERT_EX(predicate,comment) ((void)(1 && (predicate)))

#endif /* !TBB_USE_ASSERT */

namespace tbb {

    namespace internal {
#if _MSC_VER && _MSC_VER<1600
        typedef __int8 int8_t;
        typedef __int16 int16_t;
        typedef __int32 int32_t;
        typedef __int64 int64_t;
        typedef unsigned __int8 uint8_t;
        typedef unsigned __int16 uint16_t;
        typedef unsigned __int32 uint32_t;
        typedef unsigned __int64 uint64_t;
#else /* Posix */
        using ::int8_t;
        using ::int16_t;
        using ::int32_t;
        using ::int64_t;
        using ::uint8_t;
        using ::uint16_t;
        using ::uint32_t;
        using ::uint64_t;
#endif /* Posix */
    } // namespace internal

    using std::size_t;
    using std::ptrdiff_t;


extern "C" int __TBB_EXPORTED_FUNC TBB_runtime_interface_version();

namespace internal {


const size_t NFS_MaxLineSize = 128;

#define __TBB_atomic // intentionally empty, see above

#if __TBB_OVERRIDE_PRESENT
#define __TBB_override override
#else
#define __TBB_override // formal comment only
#endif

#if __TBB_CPP17_FALLTHROUGH_PRESENT
#define __TBB_fallthrough [[fallthrough]]
#elif __TBB_FALLTHROUGH_PRESENT
#define __TBB_fallthrough __attribute__ ((fallthrough))
#else
#define __TBB_fallthrough
#endif

template<class T, size_t S, size_t R>
struct padded_base : T {
    char pad[S - R];
};
template<class T, size_t S> struct padded_base<T, S, 0> : T {};

template<class T, size_t S = NFS_MaxLineSize>
struct padded : padded_base<T, S, sizeof(T) % S> {};


#define __TBB_offsetof(class_name, member_name) \
    ((ptrdiff_t)&(reinterpret_cast<class_name*>(0x1000)->member_name) - 0x1000)

#define __TBB_get_object_ref(class_name, member_name, member_addr) \
    (*reinterpret_cast<class_name*>((char*)member_addr - __TBB_offsetof(class_name, member_name)))

void __TBB_EXPORTED_FUNC handle_perror( int error_code, const char* aux_info );

#if TBB_USE_EXCEPTIONS
    #define __TBB_TRY try
    #define __TBB_CATCH(e) catch(e)
    #define __TBB_THROW(e) throw e
    #define __TBB_RETHROW() throw
#else /* !TBB_USE_EXCEPTIONS */
    inline bool __TBB_false() { return false; }
    #define __TBB_TRY
    #define __TBB_CATCH(e) if ( tbb::internal::__TBB_false() )
    #define __TBB_THROW(e) tbb::internal::suppress_unused_warning(e)
    #define __TBB_RETHROW() ((void)0)
#endif /* !TBB_USE_EXCEPTIONS */

void __TBB_EXPORTED_FUNC runtime_warning( const char* format, ... );

#if TBB_USE_ASSERT
static void* const poisoned_ptr = reinterpret_cast<void*>(-1);

//  Also works for regular (non-__TBB_atomic) pointers.
template<typename T>
inline void poison_pointer( T* __TBB_atomic & p ) { p = reinterpret_cast<T*>(poisoned_ptr); }

template<typename T>
inline bool is_poisoned( T* p ) { return p == reinterpret_cast<T*>(poisoned_ptr); }
#else
template<typename T>
inline void poison_pointer( T* __TBB_atomic & ) {/*do nothing*/}
#endif /* !TBB_USE_ASSERT */


// T is a pointer type because it will be explicitly provided by the programmer as a template argument;
// U is a referent type to enable the compiler to check that "ptr" is a pointer, deducing U in the process.
template<typename T, typename U>
inline T punned_cast( U* ptr ) {
    uintptr_t x = reinterpret_cast<uintptr_t>(ptr);
    return reinterpret_cast<T>(x);
}

#if __TBB_DEFAULTED_AND_DELETED_FUNC_PRESENT

class no_assign {
public:
    void operator=( const no_assign& ) = delete;
    no_assign( const no_assign& ) = default;
    no_assign() = default;
};

class no_copy: no_assign {
public:
    no_copy( const no_copy& ) = delete;
    no_copy() = default;
};

#else /*__TBB_DEFAULTED_AND_DELETED_FUNC_PRESENT*/

class no_assign {
    // Deny assignment
    void operator=( const no_assign& );
public:
#if __GNUC__
    no_assign() {}
#endif /* __GNUC__ */
};

class no_copy: no_assign {
    no_copy( const no_copy& );
public:
    no_copy() {}
};

#endif /*__TBB_DEFAULTED_AND_DELETED_FUNC_PRESENT*/

#if TBB_DEPRECATED_MUTEX_COPYING
class mutex_copy_deprecated_and_disabled {};
#else
// By default various implementations of mutexes are not copy constructible
// and not copy assignable.
class mutex_copy_deprecated_and_disabled : no_copy {};
#endif

template<typename T>
inline bool is_aligned(T* pointer, uintptr_t alignment) {
    return 0==((uintptr_t)pointer & (alignment-1));
}

template<typename integer_type>
inline bool is_power_of_two(integer_type arg) {
    return arg && (0 == (arg & (arg - 1)));
}

template<typename argument_integer_type, typename divisor_integer_type>
inline argument_integer_type modulo_power_of_two(argument_integer_type arg, divisor_integer_type divisor) {
    __TBB_ASSERT( is_power_of_two(divisor), "Divisor should be a power of two" );
    return (arg & (divisor - 1));
}


// i.e. for strictly positive i and j, with j being a power of 2,
// determines whether i==j<<k for some nonnegative k (so i==j yields true).
template<typename argument_integer_type, typename power2_integer_type>
inline bool is_power_of_two_at_least(argument_integer_type arg, power2_integer_type power2) {
    __TBB_ASSERT( is_power_of_two(power2), "Divisor should be a power of two" );
    return 0 == (arg & (arg - power2));
}

template<typename T1> void suppress_unused_warning( const T1& ) {}
template<typename T1, typename T2> void suppress_unused_warning( const T1&, const T2& ) {}
template<typename T1, typename T2, typename T3> void suppress_unused_warning( const T1&, const T2&, const T3& ) {}

// Struct to be used as a version tag for inline functions.
struct version_tag_v3 {};

typedef version_tag_v3 version_tag;

} // internal


class split {
};


class proportional_split: internal::no_assign {
public:
    proportional_split(size_t _left = 1, size_t _right = 1) : my_left(_left), my_right(_right) { }

    size_t left() const { return my_left; }
    size_t right() const { return my_right; }

    // used when range does not support proportional split
    operator split() const { return split(); }

#if __TBB_ENABLE_RANGE_FEEDBACK
    void set_proportion(size_t _left, size_t _right) {
        my_left = _left;
        my_right = _right;
    }
#endif
private:
    size_t my_left, my_right;
};

} // tbb

// Following is a set of classes and functions typically used in compile-time "metaprogramming".
// TODO: move all that to a separate header

#if __TBB_CPP11_SMART_POINTERS_PRESENT
#include <memory> // for unique_ptr
#endif

#if __TBB_CPP11_RVALUE_REF_PRESENT || __TBB_CPP11_DECLTYPE_PRESENT || _LIBCPP_VERSION
#include <utility> // for std::move, std::forward, std::declval
#endif

namespace tbb {
namespace internal {

#if __TBB_CPP11_SMART_POINTERS_PRESENT && __TBB_CPP11_RVALUE_REF_PRESENT && __TBB_CPP11_VARIADIC_TEMPLATES_PRESENT
    template<typename T, typename... Args>
    std::unique_ptr<T> make_unique(Args&&... args) {
        return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
    }
#endif

template<typename T>
struct allocator_type {
    typedef T value_type;
};

#if _MSC_VER
template<typename T>
struct allocator_type<const T> {
    typedef T value_type;
};
#endif

// Ad-hoc implementation of true_type & false_type
// Intended strictly for internal use! For public APIs (traits etc), use C++11 analogues.
template <bool v>
struct bool_constant {
    static /*constexpr*/ const bool value = v;
};
typedef bool_constant<true> true_type;
typedef bool_constant<false> false_type;

template <unsigned u, unsigned long long ull >
struct select_size_t_constant {
    //Explicit cast is needed to avoid compiler warnings about possible truncation.
    //The value of the right size,   which is selected by ?:, is anyway not truncated or promoted.
    static const size_t value = (size_t)((sizeof(size_t)==sizeof(u)) ? u : ull);
};

#if __TBB_CPP11_RVALUE_REF_PRESENT
using std::move;
using std::forward;
#elif defined(_LIBCPP_NAMESPACE)
// libc++ defines "pre-C++11 move and forward" similarly to ours; use it to avoid name conflicts in some cases.
using std::_LIBCPP_NAMESPACE::move;
using std::_LIBCPP_NAMESPACE::forward;
#else
// It is assumed that cv qualifiers, if any, are part of the deduced type.
template <typename T>
T& move( T& x ) { return x; }
template <typename T>
T& forward( T& x ) { return x; }
#endif /* __TBB_CPP11_RVALUE_REF_PRESENT */

// Helper macros to simplify writing templates working with both C++03 and C++11.
#if __TBB_CPP11_RVALUE_REF_PRESENT
#define  __TBB_FORWARDING_REF(A) A&&
#else
// It is assumed that cv qualifiers, if any, are part of a deduced type.
// Thus this macro should not be used in public interfaces.
#define  __TBB_FORWARDING_REF(A) A&
#endif
#if __TBB_CPP11_VARIADIC_TEMPLATES_PRESENT
#define __TBB_PARAMETER_PACK ...
#define __TBB_PACK_EXPANSION(A) A...
#else
#define __TBB_PARAMETER_PACK
#define __TBB_PACK_EXPANSION(A) A
#endif /* __TBB_CPP11_VARIADIC_TEMPLATES_PRESENT */

#if __TBB_CPP11_DECLTYPE_PRESENT
#if __TBB_CPP11_DECLVAL_BROKEN
// Ad-hoc implementation of std::declval
template <class T> __TBB_FORWARDING_REF(T) declval() /*noexcept*/;
#else
using std::declval;
#endif
#endif

template <bool condition>
struct STATIC_ASSERTION_FAILED;

template <>
struct STATIC_ASSERTION_FAILED<false> { enum {value=1};};

template<>
struct STATIC_ASSERTION_FAILED<true>; //intentionally left undefined to cause compile time error

}} // namespace tbb::internal

#if __TBB_STATIC_ASSERT_PRESENT
#define __TBB_STATIC_ASSERT(condition,msg) static_assert(condition,msg)
#else
//please note condition is intentionally inverted to get a bit more understandable error msg
#define __TBB_STATIC_ASSERT_IMPL1(condition,msg,line)       \
    enum {static_assert_on_line_##line = tbb::internal::STATIC_ASSERTION_FAILED<!(condition)>::value}

#define __TBB_STATIC_ASSERT_IMPL(condition,msg,line) __TBB_STATIC_ASSERT_IMPL1(condition,msg,line)
#define __TBB_STATIC_ASSERT(condition,msg) __TBB_STATIC_ASSERT_IMPL(condition,msg,__LINE__)
#endif

#endif /* RC_INVOKED */
#endif /* __TBB_tbb_stddef_H */