futex.hpp

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#ifndef MSTL_CORE_ASYNC_FUTEX_HPP__
#define MSTL_CORE_ASYNC_FUTEX_HPP__

 
#include "MSTL/core/typeinfo/type_traits.hpp"
MSTL_BEGIN_NAMESPACE__


using platform_wait_t =
#ifdef MSTL_PLATFORM_WINDOWS__
    long;
#else
    int;
#endif

template <typename T>
MSTL_INLINE17 constexpr bool platform_wait_valid_v = is_scalar_v<T>
    && sizeof(T) == sizeof(platform_wait_t)
    && alignof(T*) >= alignof(platform_wait_t);

enum class futex_wait_flags : platform_wait_t {
    private_flag = 0,                  
    wait = 0,                          
    wake = 1,                          
    wait_bitset = 9,                   
    wake_bitset = 10,                  
    wait_private = wait | private_flag,    
    wake_private = wake | private_flag,    
    wait_bitset_private = wait_bitset | private_flag,  
    wake_bitset_private = wake_bitset | private_flag,  
    bitset_match_any = -1              
};
 

void MSTL_API futex_wait(void* addr, platform_wait_t value) noexcept;

bool MSTL_API
futex_wait_until(void* addr, platform_wait_t value,
                 bool has_timeout, int64_t sec, int64_t ns,
                 bool is_monotonic = false);

void MSTL_API futex_notify(void* addr, bool all) noexcept;
 // Futex
 
MSTL_END_NAMESPACE__
#endif // MSTL_CORE_ASYNC_FUTEX_HPP__