| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
| 3 | |
| 4 | #include "glslmemorypool_p.h" |
| 5 | #include <cstring> |
| 6 | #include <cassert> |
| 7 | #include <cstdlib> |
| 8 | |
| 9 | QT_BEGIN_NAMESPACE |
| 10 | |
| 11 | using namespace GLSL; |
| 12 | |
| 13 | MemoryPool::MemoryPool() |
| 14 | : _blocks(nullptr), |
| 15 | _allocatedBlocks(0), |
| 16 | _blockCount(-1), |
| 17 | _ptr(nullptr), |
| 18 | _end(nullptr) |
| 19 | { } |
| 20 | |
| 21 | MemoryPool::~MemoryPool() |
| 22 | { |
| 23 | if (_blocks) { |
| 24 | for (int i = 0; i < _allocatedBlocks; ++i) { |
| 25 | if (char *b = _blocks[i]) |
| 26 | std::free(ptr: b); |
| 27 | } |
| 28 | |
| 29 | std::free(ptr: _blocks); |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | void MemoryPool::reset() |
| 34 | { |
| 35 | _blockCount = -1; |
| 36 | _ptr = _end = nullptr; |
| 37 | } |
| 38 | |
| 39 | void *MemoryPool::allocate_helper(size_t size) |
| 40 | { |
| 41 | assert(size < BLOCK_SIZE); |
| 42 | |
| 43 | if (++_blockCount == _allocatedBlocks) { |
| 44 | if (! _allocatedBlocks) |
| 45 | _allocatedBlocks = DEFAULT_BLOCK_COUNT; |
| 46 | else |
| 47 | _allocatedBlocks *= 2; |
| 48 | |
| 49 | _blocks = (char **) realloc(ptr: _blocks, size: sizeof(char *) * _allocatedBlocks); |
| 50 | |
| 51 | for (int index = _blockCount; index < _allocatedBlocks; ++index) |
| 52 | _blocks[index] = nullptr; |
| 53 | } |
| 54 | |
| 55 | char *&block = _blocks[_blockCount]; |
| 56 | |
| 57 | if (! block) |
| 58 | block = (char *) std::malloc(size: BLOCK_SIZE); |
| 59 | |
| 60 | _ptr = block; |
| 61 | _end = _ptr + BLOCK_SIZE; |
| 62 | |
| 63 | void *addr = _ptr; |
| 64 | _ptr += size; |
| 65 | return addr; |
| 66 | } |
| 67 | |
| 68 | Managed::Managed() |
| 69 | { } |
| 70 | |
| 71 | Managed::~Managed() |
| 72 | { } |
| 73 | |
| 74 | void *Managed::operator new(size_t size, MemoryPool *pool) |
| 75 | { return pool->allocate(size); } |
| 76 | |
| 77 | void Managed::operator delete(void *) |
| 78 | { } |
| 79 | |
| 80 | void Managed::operator delete(void *, MemoryPool *) |
| 81 | { } |
| 82 | |
| 83 | QT_END_NAMESPACE |
| 84 |