zmq_ctx_get(3)
ØMQ Manual - ØMQ/3.3.0
Name
zmq_ctx_get - get context options
Synopsis
int zmq_ctx_get (void *context, int option_name);
Description
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:
ZMQ_IO_THREADS: Get number of I/O threads
The ZMQ_IO_THREADS argument returns the size of the ØMQ thread pool for this context.
ZMQ_MAX_SOCKETS: Get maximum number of sockets
The ZMQ_MAX_SOCKETS argument returns the maximum number of sockets allowed for this context.
ZMQ_IPV6: Set IPv6 option
The ZMQ_IPV6 argument returns the IPv6 option for the context.
Return value
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.
Errors
- EINVAL
- The requested option option_name is unknown.
Example
Setting a limit on the number of sockets
void *context = zmq_ctx_new ();
zmq_ctx_get (context, ZMQ_MAX_SOCKETS, 256);
int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS); assert (max_sockets == 256);
See also
Authors
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