eaa8a3c4c3
Using raw mode + delay in the right places to allow tasks to work while also supporting key?
60 lines
1.6 KiB
Forth
60 lines
1.6 KiB
Forth
\ Copyright 2021 Bradley D. Nelson
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\
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\ Licensed under the Apache License, Version 2.0 (the "License");
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\ you may not use this file except in compliance with the License.
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\ You may obtain a copy of the License at
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\
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\ http://www.apache.org/licenses/LICENSE-2.0
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\
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\ Unless required by applicable law or agreed to in writing, software
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\ distributed under the License is distributed on an "AS IS" BASIS,
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\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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\ See the License for the specific language governing permissions and
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\ limitations under the License.
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( Cooperative Tasks )
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vocabulary tasks tasks definitions also internals
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variable task-list
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: .tasks task-list @ begin dup 2 cells - see. @ dup task-list @ = until drop ;
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forth definitions tasks also internals
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: pause
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rp@ sp@ task-list @ cell+ !
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task-list @ @ task-list !
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task-list @ cell+ @ sp! rp!
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;
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( Check if there are other tasks. )
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: pause? ( -- f ) task-list @ dup @ <> ;
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: task ( xt dsz rsz "name" )
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create here >r 0 , 0 , ( link, sp )
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swap here cell+ r@ cell+ ! cells allot
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here r@ cell+ @ ! cells allot
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dup 0= if drop else
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here r@ cell+ @ @ ! ( set rp to point here )
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, postpone pause ['] branch , here 3 cells - ,
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then rdrop ;
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: start-task ( t -- )
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task-list @ if
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task-list @ @ over !
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task-list @ !
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else
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dup task-list !
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dup !
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then
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;
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DEFINED? ms-ticks [IF]
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: ms ( n -- ) ms-ticks >r begin pause ms-ticks r@ - over >= until rdrop drop ;
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[THEN]
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tasks definitions
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0 0 0 task main-task main-task start-task
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only forth definitions
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