libc/src/threads/linux/cnd_wait.cpp

   1 //===-- Linux implementation of the cnd_wait 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/cnd_wait.h"
  10 #include "src/__support/common.h"
  11 #include "src/__support/macros/config.h"
  12 #include "src/__support/threads/CndVar.h"
  13 #include "src/__support/threads/mutex.h"
  14
  15 #include <threads.h> // cnd_t, mtx_t, thrd_error, thrd_success
  16
  17 namespace LIBC_NAMESPACE_DECL {
  18
  19 static_assert(sizeof(CndVar) == sizeof(cnd_t));
  20
  21 LLVM_LIBC_FUNCTION(int, cnd_wait, (cnd_t * cond, mtx_t *mtx)) {
  22   CndVar *cndvar = reinterpret_cast<CndVar *>(cond);
  23   Mutex *mutex = reinterpret_cast<Mutex *>(mtx);
  24   return cndvar->wait(mutex) ? thrd_error : thrd_success;
  25 }
  26
  27 } // namespace LIBC_NAMESPACE_DECL