[A better subject line might be "memory pool best practices".]

What is the best way to allocate SIP headers to pass to
pjsua_call_make_call()?  I have a map of SIP header-value pairs. I don't
know whether to allocate pjsip_generic_string_hdr from a pool or to use
new().  Please advise me.

If I use a pool, is it one pool per call or one pool for all calls?  If
it's a shared pool, can I reuse the pjsip_generic_string_hdr in it?  Does
the pool take care of that for me?

If I allocate pjsip_generic_string_hdr myself, when can I free() them?
When pjsua_call_make_call() returns?  In my on_stream_destroyed callback?

Dave

I do not think you have to be concerned about memory pool allocation for headers in an outgoing call. Pjsip will duplicate what you pass in msg_data.

So, something like below will be ok (disclaimer for typos):

pj_str_t hdr_text = pj_str(“my header value”);

pjsua_msg_data msg_data;

pjsip_generic_string_hdr hdr;

pjsip_generic_string_hdr_init2(hdr, &MY_GENERIC_HDR_NAME, &hdr_text);

pj_list_push_back(&msg_data->hdr_list, hdr);

pjsua_call_make_call(account, &to, NULL, NULL, &msg_data, &call_id);

Johan

From: pjsip on behalf of David Talmage
Reply-To: pjsip list
Date: Wednesday 7 September 2016 at 21:36
To: "pjsip@lists.pjsip.orgmailto:pjsip@lists.pjsip.org"
Subject: [pjsip] SIP header allocation for pjsua_call_make_call()

[A better subject line might be "memory pool best practices".]

What is the best way to allocate SIP headers to pass to pjsua_call_make_call()?  I have a map of SIP header-value pairs. I don't know whether to allocate pjsip_generic_string_hdr from a pool or to use new().  Please advise me.

If I use a pool, is it one pool per call or one pool for all calls?  If it's a shared pool, can I reuse the pjsip_generic_string_hdr in it?  Does the pool take care of that for me?

If I allocate pjsip_generic_string_hdr myself, when can I free() them?  When pjsua_call_make_call() returns?  In my on_stream_destroyed callback?

Dave

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