15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file contains the definition of the FencedAllocator class. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_ 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_ 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)#include <stdint.h> 11010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 144ad1aa43a48567659193a298fad74f55e00b3dd9Ben Murdoch#include "base/bind.h" 15f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "base/logging.h" 16010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)#include "base/macros.h" 1790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)#include "gpu/gpu_export.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace gpu { 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class CommandBufferHelper; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// FencedAllocator provides a mechanism to manage allocations within a fixed 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// block of memory (storing the book-keeping externally). Furthermore this 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// class allows to free data "pending" the passage of a command buffer token, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// that is, the memory won't be reused until the command buffer has processed 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// that token. 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// NOTE: Although this class is intended to be used in the command buffer 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// environment which is multi-process, this class isn't "thread safe", because 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// it isn't meant to be shared across modules. It is thread-compatible though 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// (see http://www.corp.google.com/eng/doc/cpp_primer.html#thread_safety). 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class GPU_EXPORT FencedAllocator { 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef unsigned int Offset; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Invalid offset, returned by Alloc in case of failure. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const Offset kInvalidOffset = 0xffffffffU; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Creates a FencedAllocator. Note that the size of the buffer is passed, but 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // not its base address: everything is handled as offsets into the buffer. 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FencedAllocator(unsigned int size, 414ad1aa43a48567659193a298fad74f55e00b3dd9Ben Murdoch CommandBufferHelper *helper, 424ad1aa43a48567659193a298fad74f55e00b3dd9Ben Murdoch const base::Closure& poll_callback); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~FencedAllocator(); 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allocates a block of memory. If the buffer is out of directly available 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // memory, this function may wait until memory that was freed "pending a 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // token" can be re-used. 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Parameters: 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // size: the size of the memory block to allocate. 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returns: 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the offset of the allocated memory block, or kInvalidOffset if out of 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // memory. 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Offset Alloc(unsigned int size); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Frees a block of memory. 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Parameters: 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // offset: the offset of the memory block to free. 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void Free(Offset offset); 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Frees a block of memory, pending the passage of a token. That memory won't 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // be re-allocated until the token has passed through the command stream. 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Parameters: 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // offset: the offset of the memory block to free. 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // token: the token value to wait for before re-using the memory. 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void FreePendingToken(Offset offset, int32 token); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Frees any blocks pending a token for which the token has been read. 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void FreeUnused(); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets the size of the largest free block that is available without waiting. 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned int GetLargestFreeSize(); 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets the size of the largest free block that can be allocated if the 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // caller can wait. Allocating a block of this size will succeed, but may 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // block. 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned int GetLargestFreeOrPendingSize(); 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Checks for consistency inside the book-keeping structures. Used for 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // testing. 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool CheckConsistency(); 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // True if any memory is allocated. 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool InUse(); 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 903551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // Return bytes of memory that is IN_USE 913551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) size_t bytes_in_use() const { return bytes_in_use_; } 923551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Status of a block of memory, for book-keeping. 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum State { 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IN_USE, 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FREE, 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FREE_PENDING_TOKEN 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Book-keeping sturcture that describes a block of memory. 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct Block { 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) State state; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Offset offset; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned int size; 106010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) int32_t token; // token to wait for in the FREE_PENDING_TOKEN case. 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Comparison functor for memory block sorting. 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class OffsetCmp { 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool operator() (const Block &left, const Block &right) { 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return left.offset < right.offset; 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef std::vector<Block> Container; 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef unsigned int BlockIndex; 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 120010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) static const int32_t kUnusedToken = 0; 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets the index of a memory block, given its offset. 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BlockIndex GetBlockByOffset(Offset offset); 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Collapse a free block with its neighbours if they are free. Returns the 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // index of the collapsed block. 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: this will invalidate block indices. 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BlockIndex CollapseFreeBlock(BlockIndex index); 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Waits for a FREE_PENDING_TOKEN block to be usable, and free it. Returns 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the new index of that block (since it may have been collapsed). 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: this will invalidate block indices. 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BlockIndex WaitForTokenAndFreeBlock(BlockIndex index); 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allocates a block of memory inside a given block, splitting it in two 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // (unless that block is of the exact requested size). 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: this will invalidate block indices. 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returns the offset of the allocated block (NOTE: this is different from 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the other functions that return a block index). 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Offset AllocInBlock(BlockIndex index, unsigned int size); 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CommandBufferHelper *helper_; 1434ad1aa43a48567659193a298fad74f55e00b3dd9Ben Murdoch base::Closure poll_callback_; 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Container blocks_; 1453551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) size_t bytes_in_use_; 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_IMPLICIT_CONSTRUCTORS(FencedAllocator); 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This class functions just like FencedAllocator, but its API uses pointers 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// instead of offsets. 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class FencedAllocatorWrapper { 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FencedAllocatorWrapper(unsigned int size, 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CommandBufferHelper* helper, 1564ad1aa43a48567659193a298fad74f55e00b3dd9Ben Murdoch const base::Closure& poll_callback, 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* base) 1584ad1aa43a48567659193a298fad74f55e00b3dd9Ben Murdoch : allocator_(size, helper, poll_callback), 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base_(base) { } 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allocates a block of memory. If the buffer is out of directly available 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // memory, this function may wait until memory that was freed "pending a 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // token" can be re-used. 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Parameters: 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // size: the size of the memory block to allocate. 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returns: 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the pointer to the allocated memory block, or NULL if out of 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // memory. 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void *Alloc(unsigned int size) { 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FencedAllocator::Offset offset = allocator_.Alloc(size); 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return GetPointer(offset); 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allocates a block of memory. If the buffer is out of directly available 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // memory, this function may wait until memory that was freed "pending a 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // token" can be re-used. 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is a type-safe version of Alloc, returning a typed pointer. 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Parameters: 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // count: the number of elements to allocate. 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returns: 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the pointer to the allocated memory block, or NULL if out of 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // memory. 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) template <typename T> T *AllocTyped(unsigned int count) { 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<T *>(Alloc(count * sizeof(T))); 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Frees a block of memory. 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Parameters: 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // pointer: the pointer to the memory block to free. 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void Free(void *pointer) { 196f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) DCHECK(pointer); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) allocator_.Free(GetOffset(pointer)); 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Frees a block of memory, pending the passage of a token. That memory won't 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // be re-allocated until the token has passed through the command stream. 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Parameters: 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // pointer: the pointer to the memory block to free. 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // token: the token value to wait for before re-using the memory. 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void FreePendingToken(void *pointer, int32 token) { 207f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) DCHECK(pointer); 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) allocator_.FreePendingToken(GetOffset(pointer), token); 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Frees any blocks pending a token for which the token has been read. 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void FreeUnused() { 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) allocator_.FreeUnused(); 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets a pointer to a memory block given the base memory and the offset. 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // It translates FencedAllocator::kInvalidOffset to NULL. 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void *GetPointer(FencedAllocator::Offset offset) { 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (offset == FencedAllocator::kInvalidOffset) ? 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NULL : static_cast<char *>(base_) + offset; 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets the offset to a memory block given the base memory and the address. 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // It translates NULL to FencedAllocator::kInvalidOffset. 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FencedAllocator::Offset GetOffset(void *pointer) { 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return pointer ? 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<FencedAllocator::Offset>( 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<char*>(pointer) - static_cast<char*>(base_)) : 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FencedAllocator::kInvalidOffset; 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets the size of the largest free block that is available without waiting. 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned int GetLargestFreeSize() { 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return allocator_.GetLargestFreeSize(); 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets the size of the largest free block that can be allocated if the 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // caller can wait. 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned int GetLargestFreeOrPendingSize() { 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return allocator_.GetLargestFreeOrPendingSize(); 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Checks for consistency inside the book-keeping structures. Used for 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // testing. 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool CheckConsistency() { 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return allocator_.CheckConsistency(); 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // True if any memory is allocated. 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool InUse() { 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return allocator_.InUse(); 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FencedAllocator &allocator() { return allocator_; } 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2563551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) size_t bytes_in_use() const { return allocator_.bytes_in_use(); } 2573551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FencedAllocator allocator_; 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* base_; 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_IMPLICIT_CONSTRUCTORS(FencedAllocatorWrapper); 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace gpu 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_ 267