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  • doc/papers/concurrency/Paper.tex

    r7951100 r08b5a7e  
    213213\lstMakeShortInline@%
    214214
    215 \newcommand{\commenttd}[1]{{\color{red}{Thierry : #1}}}
    216 
    217215\let\OLDthebibliography\thebibliography
    218216\renewcommand\thebibliography[1]{
     
    306304`&`r3 = &y; `&&`r3 = &`&`r4;             // change r1, r2: cancel implicit dereferences (&*)**r3, (&(&*)*)*r3, &(&*)r4
    307305\end{cfa}
    308 A reference is a handle to an object, like a pointer, but is automatically dereferenced by the specified number of levels.
     306A reference is a handle to an object, like a pointer, but is automatically dereferenced the specified number of levels.
    309307Referencing (address-of @&@) a reference variable cancels one of the implicit dereferences, until there are no more implicit references, after which normal expression behaviour applies.
    310308
     
    476474
    477475The signature feature of \CFA is parametric-polymorphic routines~\cite{} with routines generalized using a @forall@ clause (giving the language its name), which allow separately compiled routines to support generic usage over multiple types.
    478 For example, the following sum routine works for any type that supports construction from 0 and addition \commenttd{constructors have not been introduced yet.}:
     476For example, the following sum routine works for any type that supports construction from 0 and addition:
    479477\begin{cfa}
    480478forall( otype T | { void `?{}`( T *, zero_t ); T `?+?`( T, T ); } ) // constraint type, 0 and +
     
    528526{
    529527        VLA  x,            y = { 20, 0x01 },     z = y; $\C{// z points to y}$
    530         //    x{};         y{ 20, 0x01 };          z{ z, y };
     528        //    x{};         y{ 20, 0x01 };          z{ z, y }; 
    531529        ^x{};                                                                   $\C{// deallocate x}$
    532530        x{};                                                                    $\C{// reallocate x}$
     
    565563The resulting execution system now follows a cooperative threading-model, called \newterm{non-preemptive scheduling}.
    566564
    567 Because the scheduler is special, it can either be a stackless or stackfull coroutine. \commenttd{I dislike this sentence, it seems imply 1-step vs 2-step but also seems to say that some kind of coroutine is required, which is not the case.}
     565Because the scheduler is special, it can either be a stackless or stackfull coroutine.
    568566For stackless, the scheduler performs scheduling on the stack of the current coroutine and switches directly to the next coroutine, so there is one context switch.
    569567For stackfull, the current coroutine switches to the scheduler, which performs scheduling, and it then switches to the next coroutine, so there are two context switches.
    570 A stackfull scheduler is often used for simplicity and security, even through there is a slightly higher runtime-cost. \commenttd{I'm not a fan of the fact that we don't quantify this but yet imply it is negligeable.}
     568A stackfull scheduler is often used for simplicity and security, even through there is a slightly higher runtime-cost.
    571569
    572570Regardless of the approach used, a subset of concurrency related challenges start to appear.
     
    773771};
    774772void main( Format & fmt ) with( fmt ) {
    775         for ( ;; ) {
     773        for ( ;; ) {   
    776774                for ( g = 0; g < 5; g += 1 ) {      // group
    777775                        for ( b = 0; b < 4; b += 1 ) { // block
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