#include<iostream>void*aligned_malloc(size_tsize,intalignment){// 分配足够的内存, 这里的算法很经典, 早期的STL中使用的就是这个算法// 首先是维护FreeBlock指针占用的内存大小constintpointerSize =sizeof(void*);// alignment - 1 + pointerSize这个是FreeBlock内存对齐需要的内存大小// 前面的例子sizeof(T...
_aligned_malloc 基于malloc。_aligned_malloc 标记为 __declspec(noalias) 和__declspec(restrict);这意味着函数保证不修改全局变量,和返回的指针不用做别名。 有关更多信息,请参见 没有别名 和限制。如果内存分配失败或是如果请求的大小比_HEAP_MAXREQ 更大,则函数将 ENOMEM 设置为 errno。 有关 errno的更多...
话不多说,先贴代码如下,aligned_malloc和aligned_free,需要配合使用,否则会有内存泄漏问题。 #include<memory>void*aligned_malloc(size_tsize,size_talignment){size_toffset = alignment -1+sizeof(void*);void* originalP =malloc(size + offset);size_toriginalLocation =reinterpret_cast<size_t>(originalP)...
添加一个测试程序, #include<assert.h>voidTestAlignedMalloc(){constintsize =100;constintalignment =64;void* testArray[size];for(inti =0; i < size; ++i) {void* p =aligned_malloc(1024, alignment);assert((reinterpret_cast<size_t>(p) & (alignment -1)) ==0);printf("0x%p\n", p); ...
_aligned_offset_malloc _aligned_offset_malloc_dbg _aligned_offset_realloc _aligned_offset_realloc_dbg _aligned_offset_recalloc _aligned_offset_recalloc_dbg _aligned_realloc _aligned_realloc_dbg _aligned_recalloc _aligned_recalloc_dbg _alloca asctime, _wasctime asctime_s, _wasctime_s asin, asinf ...
// crt_aligned_malloc.c #include <malloc.h> #include <stdio.h> int main() { void *ptr; size_t alignment, off_set; // Note alignment should be 2^N where N is any positive int. alignment = 16; off_set = 5; // Using _aligned_malloc ptr = _aligned_malloc(100, alignment); if...
void * _aligned_malloc( size_t size, size_t alignment ); Parameterssize Size of the requested memory allocation.alignment The alignment value, which must be an integer power of 2.Return ValueA pointer to the memory block that was allocated or NULL if the operation failed. The pointer is ...
_aligned_malloc is based on malloc._aligned_malloc is marked __declspec(noalias) and __declspec(restrict), meaning that the function is guaranteed not to modify global variables and that the pointer returned isn't aliased. For more information, see noalias and restrict....
_aligned_malloc is based on malloc._aligned_malloc is marked __declspec(noalias) and __declspec(restrict), meaning that the function is guaranteed not to modify global variables and that the pointer returned isn't aliased. For more information, see noalias and restrict....
_aligned_malloc<malloc.h><cstdlib> Example CCopy // crt_aligned_malloc.c#include<malloc.h>#include<stdio.h>intmain(){void*ptr;size_talignment, off_set;// Note alignment should be 2^N where N is any positive int.alignment =16; off_set =5;// Using _aligned_mallocptr = _aligned_mal...