libc/src/gpu/rpc_host_call.cpp

   1 //===---------- GPU implementation of the external RPC call function ------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/gpu/rpc_host_call.h"
  10
  11 #include "src/__support/GPU/utils.h"
  12 #include "src/__support/RPC/rpc_client.h"
  13 #include "src/__support/common.h"
  14
  15 namespace LIBC_NAMESPACE {
  16
  17 // This calls the associated function pointer on the RPC server with the given
  18 // arguments. We expect that the pointer here is a valid pointer on the server.
  19 LLVM_LIBC_FUNCTION(void, rpc_host_call, (void *fn, void *data, size_t size)) {
  20   rpc::Client::Port port = rpc::client.open<RPC_HOST_CALL>();
  21   port.send_n(data, size);
  22   port.send([=](rpc::Buffer *buffer) {
  23     buffer->data[0] = reinterpret_cast<uintptr_t>(fn);
  24   });
  25   port.recv([](rpc::Buffer *) {});
  26   port.close();
  27 }
  28
  29 } // namespace LIBC_NAMESPACE