lantianman
asked on
doubt with scope of smart pointers
I am not sure when a piece of memory a referred by a smart pointer a_sp is freed. Is it freed after a_sp being used the last time or at the end of the function where a_sp is declared? Thank you!
ikework
what kind of smart-pointers are you using, an own class?
>>at the end of the function where a_sp is declared?
It's free when the variable goes out of scope.
So in most cases, it would be free when the function ends.
Continue...
It's free when the variable goes out of scope.
So in most cases, it would be free when the function ends.
Continue...
Example:
void function()
{
MySmartPtrType foofoo;
//..some code here
}//foofoo gets free here
However, if your smart pointer is inside a sub section of your function, then it would get freed when the sub section ends.
Example
void function()
{
for( int i = 0;i < 123;++i)
{
MySmartPtrType foofoo;
}
//foofoo gets free here because it goes out of scope before reaching the end of the function.
//..some code here
}
void function()
{
MySmartPtrType foofoo;
//..some code here
}//foofoo gets free here
However, if your smart pointer is inside a sub section of your function, then it would get freed when the sub section ends.
Example
void function()
{
for( int i = 0;i < 123;++i)
{
MySmartPtrType foofoo;
}
//foofoo gets free here because it goes out of scope before reaching the end of the function.
//..some code here
}
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Thank you!