libphobos/libdruntime/core/thread/types.d

   1 /**
   2  * This module provides types and constants used in thread package.
   3  *
   4  * Copyright: Copyright Sean Kelly 2005 - 2012.
   5  * License: Distributed under the
   6  *      $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0).
   7  *    (See accompanying file LICENSE)
   8  * Authors:   Sean Kelly, Walter Bright, Alex Rønne Petersen, Martin Nowak
   9  * Source:    $(DRUNTIMESRC core/thread/osthread.d)
  10  */
  11
  12 module core.thread.types;
  13
  14 /**
  15  * Represents the ID of a thread, as returned by $(D Thread.)$(LREF id).
  16  * The exact type varies from platform to platform.
  17  */
  18 version (Windows)
  19     alias ThreadID = uint;
  20 else
  21 version (Posix)
  22 {
  23     import core.sys.posix.pthread;
  24
  25     alias ThreadID = pthread_t;
  26 }
  27
  28 struct ll_ThreadData
  29 {
  30     ThreadID tid;
  31     version (Windows)
  32         void delegate() nothrow cbDllUnload;
  33 }
  34
  35 version (GNU)
  36 {
  37     version (GNU_StackGrowsDown)
  38         enum isStackGrowingDown = true;
  39     else
  40         enum isStackGrowingDown = false;
  41 }
  42 else
  43 {
  44     // this should be true for most architectures
  45     enum isStackGrowingDown = true;
  46 }
  47
  48 package
  49 {
  50     static immutable size_t PAGESIZE;
  51     version (Posix) static immutable size_t PTHREAD_STACK_MIN;
  52 }
  53
  54 shared static this()
  55 {
  56     version (Windows)
  57     {
  58         import core.sys.windows.winbase;
  59
  60         SYSTEM_INFO info;
  61         GetSystemInfo(&info);
  62
  63         PAGESIZE = info.dwPageSize;
  64         assert(PAGESIZE < int.max);
  65     }
  66     else version (Posix)
  67     {
  68         import core.sys.posix.unistd;
  69
  70         PAGESIZE = cast(size_t)sysconf(_SC_PAGESIZE);
  71         PTHREAD_STACK_MIN = cast(size_t)sysconf(_SC_THREAD_STACK_MIN);
  72     }
  73     else
  74     {
  75         static assert(0, "unimplemented");
  76     }
  77 }