aligned_alloc 是线程安全的:它表现得如同只访问通过其参数可见的内存区域,而非任何静态存储。 解分配一块内存区域的先前 free、 free_sized 及free_aligned_sized(C23 起) 或realloc 调用同步于分配同一块或部分相同的内存区域的 aligned_alloc 调用。此同步出现于任何通过解分配函数所作的内存
void*aligned_alloc(std::size_talignment,std::size_tsize); (since C++17) Allocatesizebytes of uninitialized storage whose alignment is specified byalignment(implicitly creatingobjects in the destination area). Thesizeparameter must be an integral multiple ofalignment. ...
std::destroy_n std::uninitialized_move std::uninitialized_value_construct weak_from_this std::pmr::memory_resource and std::polymorphic_allocator std::aligned_alloc transparent std::owner_less array support for std::shared_ptr allocation functions with explicit alignment Compile...
#include <cstdlib>#include <iostream>#include <memory>#include <string>intmain(){constchar*v[]={"This","is","an","example"};autosz=std::size(v);if(void*pbuf=std::aligned_alloc(alignof(std::string), sizeof(std::string)*sz)){try{autofirst=static_cast<std::string*>(pbuf);autola...
Deallocates the space previously allocated by malloc(), calloc(), aligned_alloc(),(since C11) or realloc(). If ptr is a null pointer, the function does nothing. The behavior is undefined if the value of ptr does not equal a value returned earlier by malloc(), calloc(), realloc()...
std::aligned_alloc (since C++17) call to followingobject representationcopying functions, in which case such objects are created in the destination region of storage or the result: std::memcpy std::memmove std::bit_cast (since C++20)
std::calloc,std::malloc,std::realloc,std::aligned_alloc(since C++17),std::free Calls to these functions that allocate or deallocate a particular unit of storage occur in a single total order, and each such deallocation callhappens-beforethe next allocation (if any) in this order. ...
(constchar*string);// C library memory allocationvoid*aligned_alloc(size_t alignment, size_t size);void*calloc(size_t nmemb, size_t size);voidfree(void*ptr);void*malloc(size_t size);void*realloc(void*ptr, size_t size);doubleatof(constchar*nptr);intatoi(constchar*nptr);longintatol(...
解分配之前由 malloc()、calloc() 或realloc()(但非 aligned_alloc())分配的存储空间。 本节未完成原因:share wording among `free_*` family free_sized 是线程安全的:它表现得如同只访问通过其参数可见的内存区域,而非任何静态存储。 解分配一块内存区域的 free_sized 调用同步于分配同一块或部分相同的...
implicit_aligned_alloc<int>(32)) { *p = 2; std::cout << "int 分配于 " << (void*)p << " (32 字节对齐)\n"; } } 可能的输出: a.data 分配于 0x7ffc654e8530 (64 字节) char 分配于 0x7ffc654e8530 int 分配于 0x7ffc654e8534 int 分配于 0x7ffc654e8540 (32 字节对齐)...