zmq_ctx_shutdown has not effect before any socket is created #3792
Description
Issue description
Calling zmq_ctx_shutdown does not affect the sockets created after that call unless at least 1 socket has been created before the zmq_ctx_shutdown call.
This can cause threads to block forever if shutdown is called before any socket is created, but the thread creates a socket after the shutdown.
Related to zeromq/cppzmq#377
Environment
- libzmq version (commit hash if unreleased): 4.3.2
- OS: Linux
Minimal test code / Steps to reproduce the issue
#include <zmq.h>
#include <cassert>
int main()
{
void* ctx = zmq_ctx_new();
assert(ctx);
//void* s0 = zmq_socket(ctx, ZMQ_REP); // uncomment these for ETERM in zmq_socket below
//zmq_close(s0);
zmq_ctx_shutdown(ctx);
void* s = zmq_socket(ctx, ZMQ_REP);
if (!s)
{
printf("zmq_socket failed: %s\n", zmq_strerror(zmq_errno()));
return 1;
}
//zmq_ctx_shutdown(ctx); // uncomment this for ETERM in zmq_bind
int rc = zmq_bind(s, "inproc://test");
if (rc == -1)
{
printf("zmq_bind failed: %s\n", zmq_strerror(zmq_errno()));
return 1;
}
puts("going to block");
char b[1];
rc = zmq_recv(s, b, 1, 0);
}What's the actual result? (include assertion message & call stack if applicable)
going to block
What's the expected result?
zmq_socket failed: Context was terminated