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Added an instance count to manage proper library unloading

master
acozma 2014-07-29 11:28:23 +03:00
parent f4962df6d6
commit 8fad9bf97d
1 changed files with 23 additions and 3 deletions
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26
iio_sys_obj.m
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@ -24,8 +24,9 @@ classdef iio_sys_obj < matlab.System & matlab.system.mixin.Propagates ...
%out_ch_size Output channel size [samples]
out_ch_size = 8192;
%ot_ch_no Number of active output channels
%out_ch_no Number of active output channels
out_ch_no = 1;
end
properties (Access = private)
@ -51,12 +52,28 @@ classdef iio_sys_obj < matlab.System & matlab.system.mixin.Propagates ...
end
end
methods (Static, Access = private)
%% Static functions
function out = modInstanceCnt(val)
% Manages the number of object instances to hadle proper DLL
% unloading
persistent instance_cnt;
if isempty(instance_cnt)
instance_cnt = 0;
end
instance_cnt = instance_cnt + val;
out = instance_cnt;
end
end
methods (Access = protected)
%% Common functions
function setupImpl(obj,u)
function setupImpl(obj,~)
% Implement tasks that need to be performed only once,
% such as pre-computed constants.
iio_sys_obj.modInstanceCnt(1);
[notfound, warnings]= loadlibrary(obj.libname, obj.hname);
if(libisloaded(obj.libname))
@ -188,7 +205,10 @@ classdef iio_sys_obj < matlab.System & matlab.system.mixin.Propagates ...
obj.iio_channel = {};
obj.iio_dev = {};
obj.iio_ctx = {};
unloadlibrary(obj.libname);
instCnt = iio_sys_obj.modInstanceCnt(-1);
if(instCnt == 0)
unloadlibrary(obj.libname);
end
end
end