libc/src/spawn/posix_spawn_file_actions_destroy.cpp

   1 //===-- Implementation of posix_spawn_file_actions_destroy ----------------===//
   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 "posix_spawn_file_actions_destroy.h"
  10
  11 #include "file_actions.h"
  12
  13 #include "src/__support/CPP/new.h"
  14 #include "src/__support/common.h"
  15 #include "src/__support/macros/config.h"
  16 #include "src/errno/libc_errno.h"
  17
  18 #include <spawn.h>
  19
  20 namespace LIBC_NAMESPACE_DECL {
  21
  22 LLVM_LIBC_FUNCTION(int, posix_spawn_file_actions_destroy,
  23                    (posix_spawn_file_actions_t * actions)) {
  24   if (actions == nullptr)
  25     return EINVAL;
  26   if (actions->__front == nullptr)
  27     return 0;
  28
  29   auto *act = reinterpret_cast<BaseSpawnFileAction *>(actions->__front);
  30   actions->__front = nullptr;
  31   actions->__back = nullptr;
  32   if (act == nullptr)
  33     return 0;
  34
  35   while (act != nullptr) {
  36     auto *temp = act;
  37     act = act->next;
  38     switch (temp->type) {
  39     case BaseSpawnFileAction::OPEN:
  40       delete reinterpret_cast<SpawnFileOpenAction *>(temp);
  41       break;
  42     case BaseSpawnFileAction::CLOSE:
  43       delete reinterpret_cast<SpawnFileCloseAction *>(temp);
  44       break;
  45     case BaseSpawnFileAction::DUP2:
  46       delete reinterpret_cast<SpawnFileDup2Action *>(temp);
  47       break;
  48     }
  49   }
  50
  51   return 0;
  52 }
  53
  54 } // namespace LIBC_NAMESPACE_DECL