SYNOPSIS
int xs_setctxopt (void *context, int option_name, const void *option_value, size_t option_len);
DESCRIPTION
The xs_setctxopt() function shall set the option specified by the option_name argument to the value pointed to by the option_value argument, for the Crossroads context pointed to by the context argument. The option_len argument is the size of the option value in bytes.
Caution
|
Context options take effect only if set with xs_setctxopt() prior to creating the first socket in a given context with xs_socket(). |
The following options can be set with the xs_setctxopt() function:
XS_MAX_SOCKETS: Set maximum number of sockets
The XS_MAX_SOCKETS option shall set the maximum nuber of sockets that can be simultaneously active in the given context.
Option value type
|
int |
Option value unit
|
sockets |
Default value
|
512 |
XS_IO_THREADS: Set number of worker threads
The XS_IO_THREADS option shall set the size of the thread pool created by the given context to handle I/O operations. The minimum value for this option is 1.
Option value type
|
int |
Option value unit
|
threads |
Default value
|
1 |
RETURN VALUE
The xs_setctxopt() function shall return zero if successful. Otherwise it shall return -1 and set errno to one of the values defined below.
ERRORS
- EINVAL
-
The requested option option_name is unknown, or the requested option_len or option_value is invalid.
- EFAULT
-
The provided context was invalid.
EXAMPLE
void *context = xs_init (); int io_threads = 4; rc = xs_setctxopt (context, XS_IO_THREADS, &io_threads, sizeof (io_threads)); assert (rc == 0); /* The above call MUST be called before any socket is created in context */ void *socket = xs_socket (context, XS_PUB);
SEE ALSO
AUTHORS
The Crossroads documentation was written by Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <martin@lucina.net>.