05-05-2011
Quote:
Originally Posted by
rupeshkp728
I want to find the size of the total memory allocated on the heap for the following statement:
int* a = new int[1000];How can I use the sizeof operator for this?
I used:
printf("\t===> %d\n",sizeof(*a));
Is this statement correct?
I have asked the question because when I checked the memory of heap allocated in windbg it shows me the size as fc4 i.e. 4036 which is more then 4000 and not as desired. Any hint as to what may be the cause?
The statement is not correct, you'll get the size of an int on your architecture.
windbg... hmm... that's doesn't sound really Un*x...
Remember that new[] is an operator provided by your compiler, we don't know what it does... It may for instance add a header for internal bookkeeping; or perhaps the underlying allocation mechanism on your system imposed this... Who knows?
You'll have to look at the interna of the new[] operator to find it out.
Cheers, Loïc
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LEARN ABOUT CENTOS
alter_operator
ALTER
OPERATOR(7) PostgreSQL 9.2.7 Documentation ALTER OPERATOR(7)
NAME
ALTER_OPERATOR - change the definition of an operator
SYNOPSIS
ALTER OPERATOR name ( { left_type | NONE } , { right_type | NONE } ) OWNER TO new_owner
ALTER OPERATOR name ( { left_type | NONE } , { right_type | NONE } ) SET SCHEMA new_schema
DESCRIPTION
ALTER OPERATOR changes the definition of an operator. The only currently available functionality is to change the owner of the operator.
You must own the operator to use ALTER OPERATOR. To alter the owner, you must also be a direct or indirect member of the new owning role,
and that role must have CREATE privilege on the operator's schema. (These restrictions enforce that altering the owner doesn't do anything
you couldn't do by dropping and recreating the operator. However, a superuser can alter ownership of any operator anyway.)
PARAMETERS
name
The name (optionally schema-qualified) of an existing operator.
left_type
The data type of the operator's left operand; write NONE if the operator has no left operand.
right_type
The data type of the operator's right operand; write NONE if the operator has no right operand.
new_owner
The new owner of the operator.
new_schema
The new schema for the operator.
EXAMPLES
Change the owner of a custom operator a @@ b for type text:
ALTER OPERATOR @@ (text, text) OWNER TO joe;
COMPATIBILITY
There is no ALTER OPERATOR statement in the SQL standard.
SEE ALSO
CREATE OPERATOR (CREATE_OPERATOR(7)), DROP OPERATOR (DROP_OPERATOR(7))
PostgreSQL 9.2.7 2014-02-17 ALTER OPERATOR(7)