Hi Daniel,
if i understand it correctly, it is safe to call pv_value_destroy after
assigning the $var(..) in module code.
i still have doubt on when and how to free the result of a transform returned
value.
in script
if( $(myPvar{my.mytransform,transformParameter}) =="test value") {
$var(x) = $(myPvar{my.mytransform,transformParameter});
}
in module i assign the returned value of transform with dst_val->flags =
PV_VAL_STR | PV_VAL_PKG;
since this line "if( $(myPvar{my.mytransform,transformParameter}) =="test
value") {" is allocating memory, will it be freed by script with
pv_value_destroy ?
this line "$var(x) = $(myPvar{my.mytransform,transformParameter});" assigns the
returned value to a variable, will the script free the right side of the
expression ? will it use pv_value_destroy ?
Thanks
________________________________
From: sr-dev [[email protected]] on behalf of
Daniel-Constantin Mierla [[email protected]]
Sent: Monday, January 05, 2015 3:59 AM
To: Kamailio (SER) - Development Mailing List
Subject: Re: [sr-dev] need help understanding pv_value_destroy
Hello,
if you assign to a $var(...), it makes a deep copy in pkg memory. It is up to
you to handle further the content of dst_val and free it properly.
If you set the PV_VAL_PKG (value must be in a pkg_malloc() pointer) or
PV_VAL_SHM (value must be in a shm_malloc() pointer) for dst_val, then you can
call pv_value_destroy() to get it freed. But it is not necessary, if you free
it in the code yourself.
Cheers,
Daniel
On 04/01/15 12:36, Luis Azedo wrote:
Hi Daniel,
can you help on this ?
________________________________
From: sr-dev
[[email protected]<mailto:[email protected]>]
on behalf of Luis Azedo [[email protected]<mailto:[email protected]>]
Sent: Wednesday, December 31, 2014 4:19 AM
To: [email protected]<mailto:[email protected]>
Subject: [sr-dev] need help understanding pv_value_destroy
Hi,
in some function that return a value with PV_VAL_PKG or PV_VAL_SHM, the
allocated memory is supposed to be freed by core ?
script example
my_function("some param","$var(result)");
in code =>
dst_val->flags = PV_VAL_STR | PV_VAL_PKG;
dst_pv->setf(msg, &dst_pv->pvp, (int)EQ_T, &dst_val);
when $var(result) is freed, will it free the allocated string ?
if( $(myPvar{my.mytransform,transformParameter}) == $null) {
$var(x) = $(myPvar{my.mytransform,transformParameter});
}
in code =>
dst_val->flags = PV_VAL_STR | PV_VAL_PKG;
will the memory allocated be freed in the comparison line ?
will the memory allocated be freed when $var(x) is freed ?
thank you
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Daniel-Constantin Mierla
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