I have a libuv event loop running in a background thread, it's reading from
stdin and filling a buffer read by the main thread.
There's an 'exit' function called by the main thread that does some cleanup
including these lines:
/* stop libuv loop */
uv_async_send(&stop_loop_async);
/* wait for the event loop thread */
uv_thread_join(&io_thread);
The 'stop_loop_async' is configured to call a function that will call
'uv_stop' on the background thread. That wont work when libuv is polling
for data and the program will block forever in `uv_thread_join`. Here's the
backtrace of the hanging program:
thread 1:
#0 0xb77a4424 in __kernel_vsyscall ()
#1 0xb7751e1c in pthread_join (threadid=3073854272, thread_return=0x0) at
pthread_join.c:89
#2 0x081fc309 in uv_thread_join (tid=0x826b5a0) at src/unix/thread.c:35
thread 2(the event loop thread):
#0 0xb77a4424 in __kernel_vsyscall ()
#1 0xb77579db in read () at ../sysdeps/unix/syscall-template.S:82
#2 0x081fa4c3 in read (__nbytes=<optimized out>, __buf=<optimized out>,
__fd=<optimized out>) at /usr/include/i386-linux-gnu/bits/unistd.h:45
#3 uv__read (stream=0x826b680) at src/unix/stream.c:1001
#4 uv__stream_io (loop=0xb6a00468, w=0x826b6b8, events=1) at
src/unix/stream.c:1146
#5 0x081ff35e in uv__io_poll (loop=0xb6a00468, timeout=-1) at
src/unix/linux-core.c:271
#6 0x081f6252 in uv_run (loop=0xb6a00468, mode=UV_RUN_DEFAULT) at
src/unix/core.c:284
The libuv version is 0.11.19 and operating system is linux 32 bits.
What would be the best way to deal with the problem?
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