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Unified Diff: chrome/common/file_descriptor_set_posix.h

Issue 155905: Separates ipc code from common (http://crbug.com/16829) (Closed)
Patch Set: Fixes reference to 'common_message_traits' it's actually 'common_param_traits' Created 11 years, 5 months ago
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Index: chrome/common/file_descriptor_set_posix.h
diff --git a/chrome/common/file_descriptor_set_posix.h b/chrome/common/file_descriptor_set_posix.h
deleted file mode 100644
index 342e6d932f89ced12b55c0ce34b9dd01d98e06c2..0000000000000000000000000000000000000000
--- a/chrome/common/file_descriptor_set_posix.h
+++ /dev/null
@@ -1,108 +0,0 @@
-// Copyright (c) 2006-2009 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 CHROME_COMMON_FILE_DESCRIPTOR_SET_POSIX_H_
-#define CHROME_COMMON_FILE_DESCRIPTOR_SET_POSIX_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/file_descriptor_posix.h"
-#include "base/ref_counted.h"
-
-// -----------------------------------------------------------------------------
-// A FileDescriptorSet is an ordered set of POSIX file descriptors. These are
-// associated with IPC messages so that descriptors can be transmitted over a
-// UNIX domain socket.
-// -----------------------------------------------------------------------------
-class FileDescriptorSet : public base::RefCountedThreadSafe<FileDescriptorSet> {
- public:
- FileDescriptorSet();
- ~FileDescriptorSet();
-
- // This is the maximum number of descriptors per message. We need to know this
- // because the control message kernel interface has to be given a buffer which
- // is large enough to store all the descriptor numbers. Otherwise the kernel
- // tells us that it truncated the control data and the extra descriptors are
- // lost.
- //
- // In debugging mode, it's a fatal error to try and add more than this number
- // of descriptors to a FileDescriptorSet.
- enum {
- MAX_DESCRIPTORS_PER_MESSAGE = 4,
- };
-
- // ---------------------------------------------------------------------------
- // Interfaces for building during message serialisation...
-
- // Add a descriptor to the end of the set. Returns false iff the set is full.
- bool Add(int fd);
- // Add a descriptor to the end of the set and automatically close it after
- // transmission. Returns false iff the set is full.
- bool AddAndAutoClose(int fd);
-
- // ---------------------------------------------------------------------------
-
-
- // ---------------------------------------------------------------------------
- // Interfaces for accessing during message deserialisation...
-
- // Return the number of descriptors
- unsigned size() const { return descriptors_.size(); }
- // Return true if no unconsumed descriptors remain
- bool empty() const { return descriptors_.empty(); }
- // Fetch the nth descriptor from the beginning of the set. Code using this
- // /must/ access the descriptors in order, except that it may wrap from the
- // end to index 0 again.
- //
- // This interface is designed for the deserialising code as it doesn't
- // support close flags.
- // returns: file descriptor, or -1 on error
- int GetDescriptorAt(unsigned n) const;
-
- // ---------------------------------------------------------------------------
-
-
- // ---------------------------------------------------------------------------
- // Interfaces for transmission...
-
- // Fill an array with file descriptors without 'consuming' them. CommitAll
- // must be called after these descriptors have been transmitted.
- // buffer: (output) a buffer of, at least, size() integers.
- void GetDescriptors(int* buffer) const;
- // This must be called after transmitting the descriptors returned by
- // GetDescriptors. It marks all the descriptors as consumed and closes those
- // which are auto-close.
- void CommitAll();
-
- // ---------------------------------------------------------------------------
-
-
- // ---------------------------------------------------------------------------
- // Interfaces for receiving...
-
- // Set the contents of the set from the given buffer. This set must be empty
- // before calling. The auto-close flag is set on all the descriptors so that
- // unconsumed descriptors are closed on destruction.
- void SetDescriptors(const int* buffer, unsigned count);
-
- // ---------------------------------------------------------------------------
-
- private:
- // A vector of descriptors and close flags. If this message is sent, then
- // these descriptors are sent as control data. After sending, any descriptors
- // with a true flag are closed. If this message has been received, then these
- // are the descriptors which were received and all close flags are true.
- std::vector<base::FileDescriptor> descriptors_;
-
- // This contains the index of the next descriptor which should be consumed.
- // It's used in a couple of ways. Firstly, at destruction we can check that
- // all the descriptors have been read (with GetNthDescriptor). Secondly, we
- // can check that they are read in order.
- mutable unsigned consumed_descriptor_highwater_;
-
- DISALLOW_COPY_AND_ASSIGN(FileDescriptorSet);
-};
-
-#endif // CHROME_COMMON_FILE_DESCRIPTOR_SET_POSIX_H_
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