Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(101)

Side by Side Diff: mojo/public/cpp/bindings/lib/bounds_checker.h

Issue 2250183003: Make the fuchsia mojo/public repo the source of truth. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 4 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
OLDNEW
(Empty)
1 // Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_BOUNDS_CHECKER_H_
6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_BOUNDS_CHECKER_H_
7
8 #include <stdint.h>
9
10 #include "mojo/public/cpp/system/macros.h"
11
12 namespace mojo {
13
14 class Handle;
15
16 namespace internal {
17
18 // BoundsChecker is used to validate object sizes, pointers and handle indices
19 // for payload of incoming messages.
20 class BoundsChecker {
21 public:
22 // [data, data + data_num_bytes) specifies the initial valid memory range.
23 // [0, num_handles) specifies the initial valid range of handle indices.
24 BoundsChecker(const void* data, uint32_t data_num_bytes, size_t num_handles);
25
26 ~BoundsChecker();
27
28 // Claims the specified memory range.
29 // The method succeeds if the range is valid to claim. (Please see
30 // the comments for IsValidRange().)
31 // On success, the valid memory range is shrinked to begin right after the end
32 // of the claimed range.
33 bool ClaimMemory(const void* position, uint32_t num_bytes);
34
35 // Claims the specified encoded handle (which is basically a handle index).
36 // The method succeeds if:
37 // - |encoded_handle|'s value is |kEncodedInvalidHandleValue|.
38 // - the handle is contained inside the valid range of handle indices. In this
39 // case, the valid range is shinked to begin right after the claimed handle.
40 bool ClaimHandle(const Handle& encoded_handle);
41
42 // Returns true if the specified range is not empty, and the range is
43 // contained inside the valid memory range.
44 bool IsValidRange(const void* position, uint32_t num_bytes) const;
45
46 private:
47 bool InternalIsValidRange(uintptr_t begin, uintptr_t end) const;
48
49 // [data_begin_, data_end_) is the valid memory range.
50 uintptr_t data_begin_;
51 uintptr_t data_end_;
52
53 // [handle_begin_, handle_end_) is the valid handle index range.
54 uint32_t handle_begin_;
55 uint32_t handle_end_;
56
57 MOJO_DISALLOW_COPY_AND_ASSIGN(BoundsChecker);
58 };
59
60 } // namespace internal
61 } // namespace mojo
62
63 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_BOUNDS_CHECKER_H_
OLDNEW
« no previous file with comments | « mojo/public/cpp/bindings/lib/bindings_serialization.cc ('k') | mojo/public/cpp/bindings/lib/bounds_checker.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698