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