Thanks for responding Anthony!
I may just use mod curl instead of native bc it has the functionality I need.  How can I find info on  how to use the api interface - maybe examples of how
to use the api interface from c or c++?
Freeswitch is an amazing thing. Thanks for making it available to regular people. 
Thanks!
chris

On Thu, Mar 17, 2016 at 12:25 AM, Anthony Minessale <anthony.minessale@gmail.com> wrote:
Via one of the exposed interfaces like api interface etc.
Why do you need mod_curl and native curl at the same time?


On Wednesday, March 16, 2016, Chris Mandra <mandra@gmail.com> wrote:
Thanks for the responses guys. I have another question: I need to call mod_curl api from my module. What's the proper way to call a module from a module?
thanks, chris

On Wed, Mar 16, 2016 at 4:54 PM, Anthony Minessale <anthony.minessale@gmail.com> wrote:
If you use more threads you just need to make sure the objects are properly scoped.  For instance, if you want to use a session from the other thread you need to read lock it for the life of the thread.  Objects shared need to be dynamically allocated and properly mutexed etc.

Whatever thread you call curl from will be used for the whole curl operation.


On Wednesday, March 16, 2016, Michael Jerris <mike@jerris.com> wrote:
depends on your needs.  The concern would be trying to access those objects across threads potentially could cause issues depending on if they are syncronized or not, easier to just not do it and not have the concern.  Anthony is suggesting looking at how we do it in other places.  Life cycle could be an issue, are you destroying things too early?

On Mar 16, 2016, at 5:00 AM, Chris Mandra <mandra@gmail.com> wrote:

Thanks for responding Anthony. Can you tell me this:
Should curl calls be done in separate thread or is it ok to do them in the main thread of modules?
On Tuesday, March 15, 2016, Chris Mandra <mandra@gmail.com> wrote:

Should curl calls be done in separate thread or is it ok to do them in the main thread of modules?
On Tuesday, March 15, 2016, Anthony Minessale <anthony.minessale@gmail.com> wrote:
Curl is used in a few places and is not unstable.  Study some of those mods and maybe you can see how to use it in a typical situation.  Probably its related to memory management or lifecycle of objects you may be using.

On Tuesday, March 15, 2016, Chris Mandra <mandra@gmail.com> wrote:
Hey guys, I'm working on a simple media bug module using FS 1.6. When a call comes in I'm calling switch_curl doing an http get. 

In switch_standard_app I use switch_curl and invoke switch_curl_easy_perform and exit after that.

Calling switch_curl seems very unstable. It's crashing free switch most of the time.  Are there any things I should be looking for related to this? I'm wondering if maybe this is a threading issue? Any ideas?

I've included some backtraces

Thanks, chris


(gdb) bt

#0  0x00007f8f00c59cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56

#1  0x00007f8f00c5d0d8 in __GI_abort () at abort.c:89

#2  0x00007f8f00c96394 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7f8f00da4b28 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175

#3  0x00007f8f00ca266e in malloc_printerr (ptr=<optimized out>, str=0x7f8f00da0c19 "free(): invalid pointer", action=1) at malloc.c:4996

#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3840

#5  0x00007f8f01334567 in switch_log_node_free (pnode=pnode@entry=0x7f8eb2b1f158) at src/switch_log.c:136

#6  0x00007f8eeb192a24 in read_packet (listener=listener@entry=0x7f8ebc027898, event=event@entry=0x7f8eb2b1f7f0, timeout=timeout@entry=0) at mod_event_socket.c:1361

#7  0x00007f8eeb1988a0 in listener_run (thread=<optimized out>, obj=0x7f8ebc027898) at mod_event_socket.c:2719

#8  0x00007f8f01544430 in dummy_worker (opaque=0x7f8eb2be4868) at threadproc/unix/thread.c:151

#9  0x00007f8f00ff0182 in start_thread (arg=0x7f8eb2b20700) at pthread_create.c:312

#10 0x00007f8f00d1d47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111


[

5:44

]

(gdb) bt full

#0  0x00007f8f00c59cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56

       resultvar = 0

       pid = 18329

       selftid = 18421

#1  0x00007f8f00c5d0d8 in __GI_abort () at abort.c:89

       save_stage = 2

       act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {0 <repeats 16 times>}}, sa_flags = 0, sa_restorer = 0x0}

       sigs = {__val = {32, 0 <repeats 15 times>}}

#2  0x00007f8f00c96394 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7f8f00da4b28 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175

       ap = {{gp_offset = 40, fp_offset = 32654, overflow_arg_area = 0x7f8eb2b1f010, reg_save_area = 0x7f8eb2b1efa0}}

       fd = 2

       on_2 = <optimized out>

       list = <optimized out>

       nlist = <optimized out>

       cp = <optimized out>

       written = <optimized out>

#3  0x00007f8f00ca266e in malloc_printerr (ptr=<optimized out>, str=0x7f8f00da0c19 "free(): invalid pointer", action=1) at malloc.c:4996

       buf = "00007f8ed0036700"

       cp = <optimized out>

#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3840

       size = <optimized out>

       fb = <optimized out>

       nextchunk = <optimized out>

       nextsize = <optimized out>

       nextinuse = <optimized out>

       prevsize = <optimized out>

       bck = <optimized out>

       fwd = <optimized out>

       errstr = <optimized out>

       locked = <optimized out>

#5  0x00007f8f01334567 in switch_log_node_free (pnode=pnode@entry=0x7f8eb2b1f158) at src/switch_log.c:136

       node = 0x7f8ed8012ab0

#6  0x00007f8eeb192a24 in read_packet (listener=listener@entry=0x7f8ebc027898, event=event@entry=0x7f8eb2b1f7f0, timeout=timeout@entry=0) at mod_event_socket.c:1361

       dnode = 0x7f8ed8012ab0

       do_sleep = <optimized out>

       mlen = 0

       bytes = 0

       mbuf = 0x7f8ecc1ebfc0 ""

       buf = "Content-Type: log/data\nContent-Length: 88\nLog-Level: 7\nText-Channel: 3\nLog-File: param_hps_strategy.cpp\nLog-Func: retrieve\nLog-Line: 115\nUser-Data: \347@\247\a\n\n\000\n\n\000\065-418f-a6d1-9dc8f48e0cf9\n\n\000\000\071\n\n\000c8f48e0cf9"...

       len = 88

       status = SWITCH_STATUS_BREAK

       count = 0

       elapsed = <optimized out>

       start = 1457966137

       pop = 0x7f8ed8012ab0

       ptr = 0x7f8ecc1ebfc0 ""

       crcount = 0 '\000'

       buf_len = 2048

       channel = 0x0

       clen = 0

       __PRETTY_FUNCTION__ = "read_packet"

       __func__ = "read_packet"

#7  0x00007f8eeb1988a0 in listener_run (thread=<optimized out>, obj=0x7f8ebc027898) at mod_event_socket.c:2719

       listener = 0x7f8ebc027898

       buf = '\000' <repeats 1023 times>

       len = 1024

       status = <optimized out>

       event = 0x0

       reply = "\000OK log level  [7]", '\000' <repeats 493 times>

       session = 0x0

       channel = 0x0

       revent = 0x0

       var = <optimized out>

       locked = 1

       __PRETTY_FUNCTION__ = "listener_run"

       __func__ = "listener_run"

#8  0x00007f8f01544430 in dummy_worker (opaque=0x7f8eb2be4868) at threadproc/unix/thread.c:151

       thread = 0x7f8eb2be4868

#9  0x00007f8f00ff0182 in start_thread (arg=0x7f8eb2b20700) at pthread_create.c:312

       __res = <optimized out>

       pd = 0x7f8eb2b20700

       now = <optimized out>

       unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140250860095232, -640791540281233069, 0, 0, 140250860095936, 140250860095232, 578173923610734931, 577994035108262227}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}

       not_first_call = <optimized out>

       pagesize_m1 = <optimized out>

       sp = <optimized out>

       freesize = <optimized out>

       __PRETTY_FUNCTION__ = "start_thread"

#10 0x00007f8f00d1d47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

No locals





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--
mandra
c:410.258.5281


--


_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://confluence.freeswitch.org
http://www.cluecon.com

FreeSWITCH-users mailing list
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http://www.freeswitch.org



--
mandra
c:410.258.5281