cast metal::atomic_int to int

Question

quaternionboy OP

Created Mar ’21

Replies 1

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Views 1.2k

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Is there any way to cast metal::atomic_intto int in MSLibrary like C++ Standard Library ?

C++:

Code Block  std::atomic<int> atom {10};
 int num = (int)atom;

MSL:

Code Block kernel void compute_shader (device metal::atomic_int& incremental [[buffer(0)]],threadgroup atomic_int& local [[threadgroup(0)]],ushort lid [[thread_position_in_threadgroup]] ){
  atomic_fetch_add_explicit(&local, 1, memory_order_relaxed);
  threadgroup_barrier(mem_flags::mem_threadgroup);
  if(lid == 0) {
    atomic_fetch_add_explicit(&incremental, (int)local, memory_order_relaxed);//ERROR
    atomic_fetch_add_explicit(&incremental, as_type<int>(local), memory_order_relaxed);//ERROR
  }
}

Answered by Graphics and Games Engineer in 668975022

You can use the atomic_load_explicit() function as follows:

Code Block kernel void compute_shader (device metal::atomic_int& my_atomic_int)
{
    int my_thread_int = atomic_load_explicit(&my_atomic_int, memory_order_relaxed);
    ...
}

Boost

Answer 1

Graphics and Games Engineer OP

Apple

Mar ’21

Accepted Answer

You can use the atomic_load_explicit() function as follows:

Code Block kernel void compute_shader (device metal::atomic_int& my_atomic_int)
{
    int my_thread_int = atomic_load_explicit(&my_atomic_int, memory_order_relaxed);
    ...
}

0