! :folding=none:collapseFolds=1:

! $Id$
!
! Copyright (C) 2004 Slava Pestov.
! 
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! modification, are permitted provided that the following conditions are met:
! 
! 1. Redistributions of source code must retain the above copyright notice,
!    this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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IN: threads
USE: errors
USE: io-internals
USE: kernel
USE: lists

: in-thread ( quot -- )
    #! Execute a quotation in a co-operative thread. The
    #! quotation begins executing immediately, and execution
    #! after the 'in-thread' call in the original thread
    #! resumes when the quotation yields, either due to blocking
    #! I/O or an explicit call to 'yield'.
    [
        schedule-thread
        ! Clear stacks since we never go up from this point
        [ ] set-catchstack
        { } set-callstack
        print-error
        (yield)
    ] callcc0 drop ;