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Side by Side Diff: gpu/command_buffer/client/fenced_allocator.h

Issue 9582024: Revert 124702 - GPU: Buld most of the gpu as a single DLL. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 8 years, 9 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // This file contains the definition of the FencedAllocator class. 5 // This file contains the definition of the FencedAllocator class.
6 6
7 #ifndef GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_ 7 #ifndef GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_
8 #define GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_ 8 #define GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_
9 9
10 #include <vector> 10 #include <vector>
11
12 #include "../../gpu_export.h"
13 #include "../common/logging.h" 11 #include "../common/logging.h"
14 #include "../common/types.h" 12 #include "../common/types.h"
15 13
16 namespace gpu { 14 namespace gpu {
17 class CommandBufferHelper; 15 class CommandBufferHelper;
18 16
19 // FencedAllocator provides a mechanism to manage allocations within a fixed 17 // FencedAllocator provides a mechanism to manage allocations within a fixed
20 // block of memory (storing the book-keeping externally). Furthermore this 18 // block of memory (storing the book-keeping externally). Furthermore this
21 // class allows to free data "pending" the passage of a command buffer token, 19 // class allows to free data "pending" the passage of a command buffer token,
22 // that is, the memory won't be reused until the command buffer has processed 20 // that is, the memory won't be reused until the command buffer has processed
23 // that token. 21 // that token.
24 // 22 //
25 // NOTE: Although this class is intended to be used in the command buffer 23 // NOTE: Although this class is intended to be used in the command buffer
26 // environment which is multi-process, this class isn't "thread safe", because 24 // environment which is multi-process, this class isn't "thread safe", because
27 // it isn't meant to be shared across modules. It is thread-compatible though 25 // it isn't meant to be shared across modules. It is thread-compatible though
28 // (see http://www.corp.google.com/eng/doc/cpp_primer.html#thread_safety). 26 // (see http://www.corp.google.com/eng/doc/cpp_primer.html#thread_safety).
29 class GPU_EXPORT FencedAllocator { 27 class FencedAllocator {
30 public: 28 public:
31 typedef unsigned int Offset; 29 typedef unsigned int Offset;
32 // Invalid offset, returned by Alloc in case of failure. 30 // Invalid offset, returned by Alloc in case of failure.
33 static const Offset kInvalidOffset = 0xffffffffU; 31 static const Offset kInvalidOffset = 0xffffffffU;
34 32
35 // Creates a FencedAllocator. Note that the size of the buffer is passed, but 33 // Creates a FencedAllocator. Note that the size of the buffer is passed, but
36 // not its base address: everything is handled as offsets into the buffer. 34 // not its base address: everything is handled as offsets into the buffer.
37 FencedAllocator(unsigned int size, 35 FencedAllocator(unsigned int size,
38 CommandBufferHelper *helper); 36 CommandBufferHelper *helper);
39 37
(...skipping 205 matching lines...) Expand 10 before | Expand all | Expand 10 after
245 243
246 private: 244 private:
247 FencedAllocator allocator_; 245 FencedAllocator allocator_;
248 void* base_; 246 void* base_;
249 DISALLOW_IMPLICIT_CONSTRUCTORS(FencedAllocatorWrapper); 247 DISALLOW_IMPLICIT_CONSTRUCTORS(FencedAllocatorWrapper);
250 }; 248 };
251 249
252 } // namespace gpu 250 } // namespace gpu
253 251
254 #endif // GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_ 252 #endif // GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_
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