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