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digitalmars.D.bugs - [Issue 6587] New: std.parallelism

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6587

           Summary: std.parallelism
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: debio264 gmail.com


--- Comment #0 from Andrew Wiley <debio264 gmail.com> 2011-08-31 22:34:42 PDT
---


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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6587


Andrew Wiley <debio264 gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Platform|Other                       |All
            Summary|std.parallelism             |std.parallelism's Task
                   |                            |cannot handle immutable
                   |                            |values
         OS/Version|Windows                     |All


--- Comment #1 from Andrew Wiley <debio264 gmail.com> 2011-08-31 22:39:40 PDT
---
When creating Tasks to run on a TaskPool using std.parallelism, it looks like I
can't call functions that have immutable objects:

code:
import std.parallelism;

class Test {
}

void doSomething(immutable(Test) test) {
}

void main() {
        immutable(Test) test = new immutable(Test)();
        taskPool().put(task!(doSomething)(test));
}


compiler output:
Error: can only initialize const member __args_field_0 inside constructor
Error: this is not mutable
/usr/include/d2/4.6.0/std/parallelism.d:734: Error: template instance
std.parallelism.Task!(doSomething,immutable(Test)) error instantiating
tasktest.d:11:        instantiated from here:
task!(doSomething,immutable(Test))


Is this something that can be fixed, or does this depend on having tail const
support (which would hopefully work for immutable as well)? This use case seems
particularly important as immutability is the simplest way to ensure safe
multithreading.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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David Simcha <dsimcha yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dsimcha yahoo.com


--- Comment #2 from David Simcha <dsimcha yahoo.com> 2011-09-01 06:38:52 PDT ---
This should work, but I had neglected to put a test in for it.  Anyhow, the
underlying reason it doesn't work is Bug 6588.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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--- Comment #3 from David Simcha <dsimcha yahoo.com> 2011-09-03 08:24:38 PDT ---
I found a workaround for 6588 and put it into a larger pull request with
various improvements to std.parallelism:

https://github.com/D-Programming-Language/phobos/pull/217

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prev sibling parent d-bugmail puremagic.com writes:
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David Simcha <dsimcha yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


--- Comment #4 from David Simcha <dsimcha yahoo.com> 2012-01-12 20:32:11 PST ---
This has been fixed for a few releases.  Closing.

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Jan 12 2012