libc/src/threads/mtx_init.cpp

   1 //===-- Linux implementation of the mtx_init 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/mtx_init.h"
  10 #include "include/threads.h" // For mtx_t definition.
  11 #include "src/__support/common.h"
  12 #include "src/__support/threads/mutex.h"
  13
  14 namespace __llvm_libc {
  15
  16 static_assert(sizeof(Mutex) <= sizeof(mtx_t),
  17               "The public mtx_t type cannot accommodate the internal mutex "
  18               "type.");
  19
  20 LLVM_LIBC_FUNCTION(int, mtx_init, (mtx_t * m, int type)) {
  21   auto err = Mutex::init(reinterpret_cast<Mutex *>(m), type & mtx_timed,
  22                          type & mtx_recursive, 0);
  23   return err == MutexError::NONE ? thrd_success : thrd_error;
  24 }
  25
  26 } // namespace __llvm_libc