libc/src/threads/thrd_create.cpp

   1 //===-- Linux implementation of the thrd_create 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/threads/thrd_create.h"
  10 #include "src/__support/common.h"
  11 #include "src/__support/threads/thread.h"
  12
  13 #include <errno.h>
  14 #include <threads.h> // For thrd_* type definitions.
  15
  16 namespace __llvm_libc {
  17
  18 static_assert(sizeof(thrd_t) == sizeof(__llvm_libc::Thread),
  19               "Mismatch between thrd_t and internal Thread.");
  20
  21 LLVM_LIBC_FUNCTION(int, thrd_create,
  22                    (thrd_t * th, thrd_start_t func, void *arg)) {
  23   auto *thread = reinterpret_cast<__llvm_libc::Thread *>(th);
  24   int result = thread->run(func, arg, nullptr, 0);
  25   if (result == 0)
  26     return thrd_success;
  27   else if (result == ENOMEM)
  28     return thrd_nomem;
  29   else
  30     return thrd_error;
  31 }
  32
  33 } // namespace __llvm_libc