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.
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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
Setting the number of I/O threads for a context to four..
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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);
AUTHORS
The Crossroads documentation was written by Martin Sustrik <m[blue][email protected]m[][1]> and Martin Lucina <m[blue][email protected]m[][2]>.
NOTES
- 1.
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[email protected]
- mailto:[email protected]
- 2.
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[email protected]
- mailto:[email protected]