class__pool_alloc_base{typedefstd::size_tsize_t;protected:enum{ _S_align =8};enum{ _S_max_bytes =128};enum{ _S_free_list_size = (size_t)_S_max_bytes / (size_t)_S_align };union_Obj{union_Obj* _M_free_list_link;// 指向下一个内存块char_M_client_data[1];// 表示该Obj...
__pool_alloc 继承于__pool_alloc_base, 还是首先看关键的allocate和deallocate函数: allocate函数的定义: 第一个红框,224-230, 如果支持aligned_new, alignof(类型) >__STDCPP_DEFAULT_NEW_ALIGNMENT__ 会直接调用operator_new的某一个重构版本,按照指定类型的对齐大小分配内存; 第二个红框是关键,是分配的核心...
VpNonPagedPoolCacheAlignedIl pool proviene dalla memoria non di paging allineata alla cache. VpPagedPoolCacheAlignedIl pool proviene dalla memoria di paging allineata alla cache. [in] NumberOfBytes Specifica il numero di byte di memoria da allocare. ...
Arena在blocks_中管理自己的内存,alloc_ptr_指向现在管理的block,alloc_bytes_remaining_管理现有block剩余的内存 下面是 allocate 的流程: inlinechar*Arena::Allocate(size_tbytes){// The semantics of what to return are a bit messy if we allow// 0-byteallocations, so we disallow them here (we don'...
//if 4kb aligned, there is no pool header! if ((base_address & (4096 - 1)) == 0) {memory->SystemHeapFree(base_address); } else {memory->SystemHeapFree(base_address - sizeof(X_POOL_ALLOC_HEADER)); } }void ExFreePool_entry(lpvoid_t base_address, const ppc_context_t& context) ...
};intmain(){pool_sample();pool_sample_1();test_pool_alloc();test_fast_pool_alloc();system("pause"); } boost::pool 的实现原理 pool去按照一定的增长规则,从操作系统申请一大块内存,称为block,源码中用PODptr表示。 这个PODptr结构将block分为三块,第一块是大块数据区,第二块只有sizeof(void*) ...
char_refs[i] = pool_alloc(&char_pool); } gettimeofday(&stop,NULL);pool_destroy(&char_ref_pool);pool_destroy(&char_pool);return((stop.tv_sec - start.tv_sec) *1000000LLU) + stop.tv_usec - start.tv_usec; } 开发者ID:jupvfranco,项目名称:ohmm,代码行数:25,代码来源:alloc_benchmark....
ngx_alloc:封装malloc分配内存 ngx_calloc:封装malloc分配内存,并初始化空间内容为0 ngx_memalign:返回基于一个指定alignment的大小为size的内存空间,且其地址为alignment的整数倍,alignment为2的幂。 (2) ./src/core/ngx_palloc.h/.c 封装创建/销毁内存池,从内存池分配空间等函数 ...
PagedPoolCacheAlignedI tipi di pool NonPagedPoolMustSucceed e NonPagedPoolCacheAlignedMustS sono obsoleti e non devono più essere usati.[in] NumberOfBytesNumero di byte da allocare.[in] TagSpecifica il tag del pool per la memoria allocata. I driver specificano in genere il tag del pool...
< pointer to buffer frame whichis of size UNIV_PAGE_SIZE, andaligned to an address divisible byUNIV_PAGE_SIZE */#ifndef UNIV_HOTBACKUPBPageLocklock;/*!< read-write lock of the bufferframe */#endif/* UNIV_HOTBACKUP */UT_LIST_NODE_T(buf_block_t)unzip_LRU;/*!< node of the ...