| /* |
| * Copyright (c) 2015-2017, Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| //! |
| //! \file mhw_memory_pool.c |
| //! \brief This modules implements simple memory pool infrastructure for MHW |
| //! |
| #include "mhw_memory_pool.h" |
| #include "mhw_state_heap.h" |
| |
| typedef struct _MHW_MEMORY_POOL_ENTRY |
| { |
| PMHW_MEMORY_POOL_ENTRY pNext; //!< Next pool entry (doubled linked list) |
| PMHW_MEMORY_POOL_ENTRY pPrev; //!< Prev pool entry (doubled linked list) |
| PMHW_MEMORY_POOL pPool; //!< Pool object |
| void *pAllocation; //!< Memory allocation from malloc (to be freed) |
| uint32_t dwSize; //!< Memory size allocated from malloc |
| void *pObjects; //!< Pointer to first object in this pool entry |
| uint32_t dwCount; //!< Number of objects in this pool allocation |
| } MHW_MEMORY_POOL_ENTRY, *PMHW_MEMORY_POOL_ENTRY; |
| |
| MHW_MEMORY_POOL::MHW_MEMORY_POOL(uint32_t dwObjSize, uint32_t dwObjAlignment): |
| m_pFirst(nullptr), |
| m_pLast (nullptr), |
| m_dwCount(0), |
| m_dwSize(0), |
| m_dwObjSize(dwObjSize), |
| m_dwObjAlignment(dwObjAlignment), |
| m_dwObjCount(0) |
| { |
| |
| } |
| |
| MHW_MEMORY_POOL::~MHW_MEMORY_POOL() |
| { |
| PMHW_MEMORY_POOL_ENTRY pEntry; |
| PMHW_MEMORY_POOL_ENTRY pNext; |
| |
| pEntry = m_pFirst; |
| while (pEntry) |
| { |
| pNext = pEntry->pNext; |
| if (pEntry->pAllocation) |
| { |
| MOS_FreeMemory(pEntry->pAllocation); |
| } |
| pEntry = pNext; |
| } |
| } |
| |
| // Allocate an array of objects to be added to the pool |
| void *MHW_MEMORY_POOL::Allocate(uint32_t dwObjCount) |
| { |
| uint8_t *pObjects = nullptr; |
| uint32_t dwSize; |
| PMHW_MEMORY_POOL_ENTRY pEntry = nullptr; |
| |
| if (dwObjCount == 0) |
| { |
| return nullptr; |
| } |
| |
| // Calculate total size - pool entry + objects + alignments |
| dwSize = sizeof(MHW_MEMORY_POOL_ENTRY); |
| dwSize += m_dwObjSize * dwObjCount + m_dwObjAlignment; |
| |
| pEntry = (PMHW_MEMORY_POOL_ENTRY) MOS_AllocMemory(dwSize); |
| if (!pEntry) |
| { |
| return nullptr; |
| } |
| MOS_ZeroMemory(pEntry, dwSize); |
| |
| pObjects = ((uint8_t*) pEntry) + sizeof(MHW_MEMORY_POOL_ENTRY); |
| |
| // adjust alignment if necessary |
| if ((uintptr_t(pObjects) % m_dwObjAlignment)) |
| { |
| // clear out lower bits |
| pObjects = (uint8_t*)((uintptr_t)pObjects & (~(uintptr_t)(m_dwObjAlignment - 1))); |
| // add alignment |
| pObjects += m_dwObjAlignment; |
| } |
| |
| // Insert pool entry into linked list |
| pEntry->pNext = nullptr; |
| pEntry->pPrev = m_pLast; |
| m_pLast = pEntry; |
| |
| if (pEntry->pPrev) pEntry->pPrev->pNext = pEntry; |
| |
| if (!m_pFirst) m_pFirst = pEntry; |
| |
| // Setup pool entry |
| pEntry->pPool = this; |
| pEntry->pAllocation = (void *)pEntry; |
| pEntry->dwSize = dwSize; |
| pEntry->pObjects = pObjects; |
| pEntry->dwCount = dwObjCount; |
| |
| // Update pool object |
| m_dwCount++; |
| m_dwSize += dwSize; |
| m_dwObjCount += dwObjCount; |
| |
| return pObjects; |
| } |