[Issue 318] New: wait does not release thread resources on Linux

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=318

           Summary: wait does not release thread resources on Linux
           Product: D
           Version: 0.165
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: blocker
          Priority: P2
         Component: Phobos
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: mclysenk at mtu.edu


While wait is supposed to release a thread's resources, it will fail if the
thread has already completed.  This makes it impossible to use more than 400
threads reliably.  Here is an example which demonstrates the problem:


import std.stdio, std.thread;

void main()
{
    for(int i=0; i<80000; i++)
    {
        writefln("Creating thread %d", i);
        Thread t = new Thread({writefln("    Created!"); return 0;});
        t.start;
        for(int x=0; x<1000; x++)
            Thread.yield;
        t.wait;
        writefln("    Finished.");
    }
}


Within a few hundred iterations, this code will likely produce a "failed to
start" error.  From my testing, this issue only affects Linux.

So far, there are no workarounds.


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