95 lines
1.8 KiB
C++
95 lines
1.8 KiB
C++
/*
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This demonstrates dynamic initialization of
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vars. It even works for static modules
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because code is generated which runs at
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$LK,"Load","MN:Load"$() time to initialize them.
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This file is dual use -- you can JIT compile
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it or static compile it. If you static compile
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then override the filename extension warning.
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Static vars are, essentually, global var.
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*/
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#ifstatic
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#include "::/SparrowOS/OSMain/StaticAdam.HPP.Z"
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#endif
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class Test
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{
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I32 time;
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U8 name[8];
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};
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Test g1[]={
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{10,"Name1"},
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{(tNP%10.0)*100,"Name2"}, //Dynamic initialization
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{30,"Name3"}
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};
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D(g1,sizeof(g1));
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"Time 1:%d\n",g1[1].time;
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U0 Main1()
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{
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static Test s1[]={
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{10,"Static1"},
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{(tNP%10.0)*100,"Static2"}, //Dynamic initialization
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{30,"Static3"}
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};
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D(s1,sizeof(s1));
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"Time 2:%d\n",s1[1].time;
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}
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Main1;
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/*
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Now, we'll use the data heap glbl option
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to force global vars onto the data heap.
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You can't initialize heap glbls in a static
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module.
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You can turn the data heap flag
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on and off within your programs, leaving
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ones which need initialization on the code heap.
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You can't dynamically initialize data heap
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glbls--they are constants. This might be a silly
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point, but might result in odd differences, perhaps
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from the order things are evaluated.
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Data heap glbls are good for static modules
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because they don't take-up room in the .BIN.Z file.
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*/
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#ifnstatic
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#exe {OptOn(OPTf_GLBLS_ON_DATA_HEAP);};
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Test g2[]={
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{10,"name1"},
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{(tNP%10.0)*100,"name2"}, //No dynamic initialization--converted to a constant
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{30,"name3"}
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};
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D(g2,sizeof(g2));
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"Time 3:%d\n",g2[1].time;
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U0 Main2()
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{
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static Test s2[]={
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{10,"static1"},
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{(tNP%10.0)*100,"static2"}, //No dynamic initialization--converted to a constant
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{30,"static3"}
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};
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D(s2,sizeof(s2));
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"Time 4:%d\n",s2[1].time;
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}
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Main2;
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#exe {OptOn(OPTf_GLBLS_ON_DATA_HEAP);};
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#endif
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NewLine;
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