libc/src/pthread/pthread_join.cpp

   1 //===-- Implementation of the pthread_join 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 "pthread_join.h"
  10
  11 #include "src/__support/common.h"
  12 #include "src/__support/threads/thread.h"
  13
  14 #include <pthread.h> // For pthread_* type definitions.
  15
  16 namespace __llvm_libc {
  17
  18 static_assert(sizeof(pthread_t) == sizeof(__llvm_libc::Thread),
  19               "Mismatch between pthread_t and internal Thread.");
  20
  21 LLVM_LIBC_FUNCTION(int, pthread_join, (pthread_t th, void **retval)) {
  22   auto *thread = reinterpret_cast<Thread *>(&th);
  23   int result = thread->join(retval);
  24   return result;
  25 }
  26
  27 } // namespace __llvm_libc