Changes in / [b4e1876:09ccaf5]


Ignore:
File:
1 edited

Legend:

Unmodified
Added
Removed
  • doc/papers/concurrency/Paper.tex

    rb4e1876 r09ccaf5  
    217217\lstMakeShortInline@%
    218218
    219 \newcommand{\commenttd}[1]{{\color{red}{Thierry : #1}}}
    220 
    221219\let\OLDthebibliography\thebibliography
    222220\renewcommand\thebibliography[1]{
     
    310308`&`r3 = &y; `&&`r3 = &`&`r4;             // change r1, r2: cancel implicit dereferences (&*)**r3, (&(&*)*)*r3, &(&*)r4
    311309\end{cfa}
    312 A reference is a handle to an object, like a pointer, but is automatically dereferenced by the specified number of levels.
     310A reference is a handle to an object, like a pointer, but is automatically dereferenced the specified number of levels.
    313311Referencing (address-of @&@) a reference variable cancels one of the implicit dereferences, until there are no more implicit references, after which normal expression behaviour applies.
    314312
     
    480478
    481479The 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.
    482 For example, the following sum routine works for any type that supports construction from 0 and addition \commenttd{constructors have not been introduced yet.}:
     480For example, the following sum routine works for any type that supports construction from 0 and addition:
    483481\begin{cfa}
    484482forall( otype T | { void `?{}`( T *, zero_t ); T `?+?`( T, T ); } ) // constraint type, 0 and +
     
    532530{
    533531        VLA  x,            y = { 20, 0x01 },     z = y; $\C{// z points to y}$
    534         //    x{};         y{ 20, 0x01 };          z{ z, y };
     532        //    x{};         y{ 20, 0x01 };          z{ z, y }; 
    535533        ^x{};                                                                   $\C{// deallocate x}$
    536534        x{};                                                                    $\C{// reallocate x}$
     
    569567The resulting execution system now follows a cooperative threading-model, called \newterm{non-preemptive scheduling}.
    570568
    571 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.}
     569Because the scheduler is special, it can either be a stackless or stackfull coroutine.
    572570For 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.
    573571For 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.
    574 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.}
     572A stackfull scheduler is often used for simplicity and security, even through there is a slightly higher runtime-cost.
    575573
    576574Regardless of the approach used, a subset of concurrency related challenges start to appear.
     
    777775};
    778776void main( Format & fmt ) with( fmt ) {
    779         for ( ;; ) {
     777        for ( ;; ) {   
    780778                for ( g = 0; g < 5; g += 1 ) {      // group
    781779                        for ( b = 0; b < 4; b += 1 ) { // block
Note: See TracChangeset for help on using the changeset viewer.