通过将其传递给库文件来分配和释放指针? [英] allocate and free pointer by passing it to library files?

问题描述

我想将内存分配给main函数中的指针，然后将其传递给库函数并在库函数中将其释放.

如何实现呢?

请帮助我....

I want to allocate memory to a pointer in main function, then pass it to a library function and free it there in the library function.

How to implement this?

Please help me....

推荐答案

^ ]

与您所说的完全一样.
你有没有尝试过?您遇到了什么问题?

Exactly like you said it.
have you tried? what problem did you faced?

就像琼所说的那样，
使用指针的引用(或指向上方)是安全的
对于它们的堆栈传递(在同一进程的任何(解除)分配上下文中):):

As Joan said,
it is safe to use the referencing (or overpointing) of the pointers
for their stack passing (in any (de-)allocation contexts of the same process) :) :

extern void lib_alloc(int** ppInt);
//{
//  if (ppInt) {
//    *ppInt = new int[2];
//  }
//}

extern void lib_free(int** ppInt);
//{
//  if (ppInt) {
//    delete *ppInt;
//    *ppInt = NULL;
//  }
//}

void loc_test()
{
  int* pInt(NULL);
  lib_alloc(&pInt);
  lib_free(&pInt);
}

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