Template Function shad::rt::executeAtWithRet(const Locality&, FunT&&, const std::shared_ptr<uint8_t>&, const uint32_t, ResT *)

Function Documentation

template <typename FunT, typename ResT>
void shad::rt::executeAtWithRet(const Locality &loc, FunT &&func, const std::shared_ptr<uint8_t> &argsBuffer, const uint32_t bufferSize, ResT *result)

Execute a function on a selected locality synchronously and return a result.

Typical Usage: 

struct Args {
  int a;
  char b;
};

void task(const uint8_t *src, const uint32_t size,
          Args * res) {
  memcpy(src, res, sizeof(Args));
}

Args args { 2, 'a' };
/* Args doesn't need a dynamic allocated buffer but
 * more complicated data structure might need it */
std::shared_ptr<uint8_t> ptr(new uint8_t[sizeof(Args)],
                             std::default_delete<uint8_t[]>());
memcpy(ptr.get(), &args, sizeof(Args));

Args out;
for (auto & locality : allLocalities)
  if (static_cast<uint32_t>(locality) % 2)
    // every call will overwrite out
    executeAtWithRet(locality, task, ptr, sizeof(Args), &out);

Template Parameters
  • FunT: The type of the function to be executed. The function prototype must be: 
    void(const uint8_t *, const uint32_t, ResT *);
  • ResT: The type of the result value. The type can be a structure or a class but with the restriction that must be memcopy-able.
Parameters
  • loc: The Locality where the function must be executed.
  • func: The function to execute.
  • argsBuffer: A buffer of bytes to be passed to the function.
  • bufferSize: The size of the buffer argsBuffer passed.
  • result: The location where to store the result.