zmq_ctx_get - get context options
int zmq_ctx_get (void *context, int
option_name );
The
zmq_ctx_get() function shall return the option specified by the
option_name argument.
The
zmq_ctx_get() function accepts the following option names:
The
ZMQ_IO_THREADS argument returns the size of the 0MQ thread pool for
this context.
The
ZMQ_MAX_SOCKETS argument returns the maximum number of sockets
allowed for this context.
The
ZMQ_MAX_MSGSZ argument returns the maximum size of a message allowed
for this context. Default value is INT_MAX.
The
ZMQ_SOCKET_LIMIT argument returns the largest number of sockets that
zmq_ctx_set(3) will accept.
The
ZMQ_IPV6 argument returns the IPv6 option for the context.
The
ZMQ_BLOCKY argument returns 1 if the context will block on terminate,
zero if the "block forever on context termination" gambit was
disabled by setting ZMQ_BLOCKY to false on all new contexts.
The
ZMQ_MSG_T_SIZE argument returns the size of the zmq_msg_t structure
at runtime, as defined in the include/zmq.h public header. This is useful for
example for FFI bindings that can’t simply do a sizeof(). NOTE: in
DRAFT state, not yet available in stable releases.
The
zmq_ctx_get() function returns a value of 0 or greater if successful.
Otherwise it returns -1 and sets
errno to one of the values defined
below.
EINVAL
The requested option option_name is unknown.
Setting a limit on the number of sockets.
void *context = zmq_ctx_new ();
zmq_ctx_set (context, ZMQ_MAX_SOCKETS, 256);
int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS);
assert (max_sockets == 256);
Switching off the context deadlock gambit.
zmq_ctx_set (ctx, ZMQ_BLOCKY, false);
zmq_ctx_set(3)
zmq(7)
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