Hi,
I have been trying to use the pjsip on linux, and I found a strange problem.
Because of my English is very poor, I try my best to explain it clearly.
First, I download the pjsip code(version 2.2.1) in the CentOS(linux), and build it using the default configuration.
# ./configure
# make dep
# make
2nd, I wite an app use the pjsua-api. When the app received a "BYE" msg to DISCONNECT the sip connection, the problem hanppened.
A pjsip thread is block on the pthread_join(). And,when I try to use the pjsua_call_make_call () to make a new call, my app main thread is blocked by pthread_mutex_lock (). So, it is no-response forever.
The callstack1:
Thread 16 (Thread 0xb29fdb70 (LWP 9619)):
#0 0x00110424 in __kernel_vsyscall ()
#1 0x00ae21fd in pthread_join () from /lib/libpthread.so.0
#2 0x08122c74 in PaUnixThread_Terminate ()
#3 0x08125bf9 in RealStop ()
#4 0x080b1485 in strm_stop ()
#5 0x080c173d in pjmedia_snd_port_destroy ()
#6 0x0806c648 in close_snd_dev ()
#7 0x0806dfa6 in close_snd_timer_cb ()
#8 0x08142dec in pj_timer_heap_poll ()
#9 0x0808ff45 in pjsip_endpt_handle_events2 ()
#10 0x0805ea2e in pjsua_handle_events ()
#11 0x0805eb3e in worker_thread ()
#12 0x08134d77 in thread_main ()
#13 0x00ae1b39 in start_thread () from /lib/libpthread.so.0
#14 0x009f8d6e in clone () from /lib/libc.so.6
The callstack2:
Thread 2 (Thread 0xb7fdfb70 (LWP 9605)):
#0 0x00110424 in __kernel_vsyscall ()
#1 0x00ae8189 in __lll_lock_wait () from /lib/libpthread.so.0
#2 0x00ae352e in _L_lock_731 () from /lib/libpthread.so.0
#3 0x00ae343a in pthread_mutex_lock () from /lib/libpthread.so.0
#4 0x08134ae0 in pj_mutex_lock ()
#5 0x0805b1e2 in pjsua_call_make_call ()
#6 0x0804d84d in VOIP_PjsipMakeCall (pcSipUrl=0x8196f3c "sip:192.168.106.1") at voip_pjsip.c:212
#7 0x0804e47e in VOIP_ProcPttStartRe (pstMsg=0xb7fdee48) at voip_tcp.c:210
#8 0x0804e545 in VOIP_ProcTcpBuf (pucBuf=0xb7fdee48 "D\001", puiBufLen=0xb7fdee44) at voip_tcp.c:247
#9 0x0804dba4 in MAIN_ThreadMain (pPara=0x0) at main.c:126
#10 0x00ae1b39 in start_thread () from /lib/libpthread.so.0
#11 0x009f8d6e in clone () from /lib/libc.so.6
I thought maybe the pjsip worker_thread get the mutex lock and not release it before blocked by the pthread_join (). I check the code and make sure it. In the function close_snd_timer_cb(), close_snd_dev () be called between the PJSUA_LOCK() and PJSUA_UNLOCK();
Then, the question is "why the worker_thread will be blocked by the pthread_join?"
Any help will be greatly appreciated as I have been stuck on this for quite some while.
Luyao
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