Index: base/file_descriptor_shuffle.h |
diff --git a/base/file_descriptor_shuffle.h b/base/file_descriptor_shuffle.h |
deleted file mode 100644 |
index 5740bfa0901f4070b2e0d870b7d606435b48e000..0000000000000000000000000000000000000000 |
--- a/base/file_descriptor_shuffle.h |
+++ /dev/null |
@@ -1,87 +0,0 @@ |
-// Copyright (c) 2011 The Chromium Authors. All rights reserved. |
-// Use of this source code is governed by a BSD-style license that can be |
-// found in the LICENSE file. |
- |
-#ifndef BASE_FILE_DESCRIPTOR_SHUFFLE_H_ |
-#define BASE_FILE_DESCRIPTOR_SHUFFLE_H_ |
- |
-// This code exists to perform the shuffling of file descriptors which is |
-// commonly needed when forking subprocesses. The naive approve is very simple, |
-// just call dup2 to setup the desired descriptors, but wrong. It's tough to |
-// handle the edge cases (like mapping 0 -> 1, 1 -> 0) correctly. |
-// |
-// In order to unittest this code, it's broken into the abstract action (an |
-// injective multimap) and the concrete code for dealing with file descriptors. |
-// Users should use the code like this: |
-// base::InjectiveMultimap file_descriptor_map; |
-// file_descriptor_map.push_back(base::InjectionArc(devnull, 0, true)); |
-// file_descriptor_map.push_back(base::InjectionArc(devnull, 2, true)); |
-// file_descriptor_map.push_back(base::InjectionArc(pipe[1], 1, true)); |
-// base::ShuffleFileDescriptors(file_descriptor_map); |
-// |
-// and trust the the Right Thing will get done. |
- |
-#include <vector> |
- |
-#include "base/base_export.h" |
-#include "base/compiler_specific.h" |
- |
-namespace base { |
- |
-// A Delegate which performs the actions required to perform an injective |
-// multimapping in place. |
-class InjectionDelegate { |
- public: |
- // Duplicate |fd|, an element of the domain, and write a fresh element of the |
- // domain into |result|. Returns true iff successful. |
- virtual bool Duplicate(int* result, int fd) = 0; |
- // Destructively move |src| to |dest|, overwriting |dest|. Returns true iff |
- // successful. |
- virtual bool Move(int src, int dest) = 0; |
- // Delete an element of the domain. |
- virtual void Close(int fd) = 0; |
- |
- protected: |
- virtual ~InjectionDelegate() {} |
-}; |
- |
-// An implementation of the InjectionDelegate interface using the file |
-// descriptor table of the current process as the domain. |
-class FileDescriptorTableInjection : public InjectionDelegate { |
- virtual bool Duplicate(int* result, int fd) OVERRIDE; |
- virtual bool Move(int src, int dest) OVERRIDE; |
- virtual void Close(int fd) OVERRIDE; |
-}; |
- |
-// A single arc of the directed graph which describes an injective multimapping. |
-struct InjectionArc { |
- InjectionArc(int in_source, int in_dest, bool in_close) |
- : source(in_source), |
- dest(in_dest), |
- close(in_close) { |
- } |
- |
- int source; |
- int dest; |
- bool close; // if true, delete the source element after performing the |
- // mapping. |
-}; |
- |
-typedef std::vector<InjectionArc> InjectiveMultimap; |
- |
-BASE_EXPORT bool PerformInjectiveMultimap(const InjectiveMultimap& map, |
- InjectionDelegate* delegate); |
- |
-BASE_EXPORT bool PerformInjectiveMultimapDestructive( |
- InjectiveMultimap* map, |
- InjectionDelegate* delegate); |
- |
-// This function will not call malloc but will mutate |map| |
-static inline bool ShuffleFileDescriptors(InjectiveMultimap* map) { |
- FileDescriptorTableInjection delegate; |
- return PerformInjectiveMultimapDestructive(map, &delegate); |
-} |
- |
-} // namespace base |
- |
-#endif // BASE_FILE_DESCRIPTOR_SHUFFLE_H_ |