内存泄漏 - 你能帮我找到它们的片段吗？ [英] Memory Leaks - Can you help me find them in ths snippet
问题描述
我正在编写一些与本机C库交互的c ++代码，并且
必须进行一些动态内存分配才能支持它。我得到了内存泄漏的内存泄漏，我认为这段代码是罪魁祸首。可以
有人告诉我我可能做错了吗？
char **栏;
栏=（CHAR ** ）malloc（lColumnCount * sizeof（CHAR *））;
if（NULL == columns）返回FALSE; //内存分配失败
//为char中的列名分配空间**
int column_index;
for （column_index = 0; column_index< lColumnCount; column_index ++）
{
//为最大owner.table.column表示法分配
列[column_index] =（char *）malloc（SE_QUALIFIED_COLUMN_LEN）;
if（NULL == columns [column_index]）
{
delete []列; //内存分配失败
返回FALSE;
}
}
//把（** column_index = 0; column_index< lColumnCount; column_index ++）
{
strcpy（columns [column_index]}中的数据，CStringColumnName [column_index]）;
}
//用列做一些东西
....... 。
删除[]列;
妮可
< blockquote> nm******@gmail.com 写道：
我正在编写一些与本机C库交互的c ++代码，并且
必须进行一些动态内存分配才能支持它。我得到了内存泄漏的内存泄漏，我认为这段代码是罪魁祸首。可以
有人告诉我我可能做错了吗？
char **栏;
栏=（CHAR ** ）malloc（lColumnCount * sizeof（CHAR *））;
[..]
delete [] columns;
不要混合''malloc / free''和'new / delete''（或''new [] / delete []'' ）。
成对出现，成对使用。
V
-
请在通过电子邮件回复时删除资金''A'
我没有回复最热门的回复，请不要问
谢谢，我想知道这是不是一个问题。我继续进行改变，但仍然有内存泄漏。任何人都有任何想法
我？我知道它命中了免费（列）在代码的最后
片段。
char **列;
列=（CHAR **）malloc（ lColumnCount * sizeof（CHAR *））;
if（NULL == columns）返回FALSE; //内存分配失败
//为char中的列名分配空间**
int column_index;
for （column_index = 0; column_index< lColumnCount; column_index ++）
{
//为最大owner.table.column表示法分配
列[column_index] =（char *）malloc（SE_QUALIFIED_COLUMN_LEN）;
if（NULL == columns [column_index]）
{
免费（列）; //内存分配失败
返回FALSE;
}
}
//将数据放入char **
for（column_index = 0; column_index< lColumnCount; column_index ++）
{
strcpy（columns [column_index]，CStringColumnName [column_index ]）;
}
//用列做一些东西
........
免费（列）;
On 2008-01-28 12:35:34 -0500，" nm ****** @ gmail .COM" < nm ****** @ gmail.comsaid：
//为最大owner.table.column表示法分配
columns [column_index] =（char *）malloc（SE_QUALIFIED_COLUMN_LEN）;
这里分配的内存永远不会被释放。
-
Pete
Roundhouse Consulting，Ltd。（ www.versatilecoding.com ）作者;
标准C ++库扩展：教程和参考
（ www.petebecker.com/tr1book ）
I am writing some c++ code that interacts with a native C library and
have to do some dynamic memory allocation to support it. I am getting
memory leaks and I think this piece of code is the culprit. Can
anyone tell me what I might be doing wrong?
char **columns;
columns = (CHAR **)malloc (lColumnCount * sizeof (CHAR *));
if (NULL == columns) return FALSE; //memory allocation failed
//allocate space for the column names in the char**
int column_index;
for (column_index = 0; column_index < lColumnCount; column_index++)
{
// Allocate for the maximum owner.table.column notation
columns[column_index] = (char *)malloc(SE_QUALIFIED_COLUMN_LEN);
if (NULL == columns[column_index])
{
delete[] columns; //memory allocation failed
return FALSE;
}
}
//put the data in the char**
for (column_index = 0; column_index < lColumnCount; column_index++)
{
strcpy (columns[column_index], CStringColumnName[column_index]);
}
//do some stuff with columns
........
delete[] columns;
Nicole
nm******@gmail.com wrote:I am writing some c++ code that interacts with a native C library and
have to do some dynamic memory allocation to support it. I am getting
memory leaks and I think this piece of code is the culprit. Can
anyone tell me what I might be doing wrong?
char **columns;
columns = (CHAR **)malloc (lColumnCount * sizeof (CHAR *));
[..]
delete[] columns;Don''t EVER mix ''malloc/free'' and ''new/delete'' (or ''new[]/delete[]'').
Those come in pairs, use them in pairs.
V
--
Please remove capital ''A''s when replying by e-mail
I do not respond to top-posted replies, please don''t ask
Thanks, I was wondering if that was a problem. I went ahead and made
the change, but still have memory leaks. Anyone have any ideas for
me? I know it hits the "free(columns)" at the end of the code
snippet.
char **columns;
columns = (CHAR **)malloc (lColumnCount * sizeof (CHAR *));
if (NULL == columns) return FALSE; //memory allocation failed
//allocate space for the column names in the char**
int column_index;
for (column_index = 0; column_index < lColumnCount; column_index++)
{
// Allocate for the maximum owner.table.column notation
columns[column_index] = (char *)malloc(SE_QUALIFIED_COLUMN_LEN);
if (NULL == columns[column_index])
{
free(columns); //memory allocation failed
return FALSE;
}
}
//put the data in the char**
for (column_index = 0; column_index < lColumnCount; column_index++)
{
strcpy (columns[column_index], CStringColumnName[column_index]);
}
//do some stuff with columns
........
free(columns);
On 2008-01-28 12:35:34 -0500, "nm******@gmail.com" <nm******@gmail.comsaid:
// Allocate for the maximum owner.table.column notation
columns[column_index] = (char *)malloc(SE_QUALIFIED_COLUMN_LEN);The memory allocated here never gets freed.
--
Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
(www.petebecker.com/tr1book)
这篇关于内存泄漏 - 你能帮我找到它们的片段吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
