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Side by Side Diff: native_client_sdk/src/libraries/nacl_mounts/kernel_handle.h

Issue 12194030: Rename mount (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Fix c file. Created 7 years, 10 months ago
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1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 */
5 #ifndef LIBRARIES_NACL_MOUNTS_KERNEL_HANDLE_H_
6 #define LIBRARIES_NACL_MOUNTS_KERNEL_HANDLE_H_
7
8 #include <pthread.h>
9
10 #include "nacl_mounts/ostypes.h"
11 #include "utils/macros.h"
12 #include "utils/ref_object.h"
13
14 class Mount;
15 class MountNode;
16
17 // KernelHandle provides a reference counted container for the open
18 // file information, such as it's mount, node, access type and offset.
19 // KernelHandle can only be referenced when the KernelProxy lock is held.
20 class KernelHandle : public RefObject {
21 public:
22 KernelHandle(Mount* mnt, MountNode* node, int oflags);
23
24 off_t Seek(off_t offset, int whence);
25
26 Mount* mount_;
27 MountNode* node_;
28 int mode_;
29 size_t offs_;
30
31 private:
32 // May only be called by the KernelProxy when the Kernel's
33 // lock is held.
34 friend class KernelObject;
35 friend class KernelProxy;
36 void Acquire() { RefObject::Acquire(); }
37 bool Release() { return RefObject::Release(); }
38 DISALLOW_COPY_AND_ASSIGN(KernelHandle);
39 };
40
41 #endif // LIBRARIES_NACL_MOUNTS_KERNEL_HANDLE_H_
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