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WTSupported in traditional Synergy on Windows
WNSupported in Synergy .NET on Windows
USupported on UNIX
VSupported on OpenVMS
channel = %SYN_FREECHN([start][, end])
The number of the next available channel, or 0 if no channel is available. (n)
(optional) The first channel to consider. (n)
(optional) The last channel to consider. (n)
%SYN_FREECHN checks the channels between start and end, if specified, and returns the first available channel.
In Synergy .NET, when using multi‑threading, don’t use %SYN_FREECHN. Instead, pass a variable to your OPEN statement that is 0. The runtime will generate a channel number automatically. For example,
open(var=0, i, "mylst")
See OPEN for more information.
The example below checks the channels between 101 and 199 and returns the first available channel encountered.
record chn ,i4 proc chn = %syn_freechn(101, 199) if (.not. chn)
writes(1, "no channels available")