lib/perl5/5.8.8/msys/CORE/fakethr.h

   1 /*    fakethr.h
   2  *
   3  *    Copyright (C) 1999, by Larry Wall and others
   4  *
   5  *    You may distribute under the terms of either the GNU General Public
   6  *    License or the Artistic License, as specified in the README file.
   7  *
   8  */
   9
  10 typedef int perl_mutex;
  11 typedef int perl_key;
  12
  13 typedef struct perl_thread *perl_os_thread;
  14 /* With fake threads, thr is global(ish) so we don't need dTHR */
  15 #define dTHR extern int errno
  16
  17 struct perl_wait_queue {
  18     struct perl_thread *        thread;
  19     struct perl_wait_queue *    next;
  20 };
  21 typedef struct perl_wait_queue *perl_cond;
  22
  23 /* Ask thread.h to include our per-thread extras */
  24 #define HAVE_THREAD_INTERN
  25 struct thread_intern {
  26     perl_os_thread next_run, prev_run;  /* Linked list of runnable threads */
  27     perl_cond   wait_queue;             /* Wait queue that we are waiting on */
  28     IV          private;                /* Holds data across time slices */
  29     I32         savemark;               /* Holds MARK for thread join values */
  30 };
  31
  32 #define init_thread_intern(t)                           \
  33     STMT_START {                                        \
  34         t->self = (t);                                  \
  35         (t)->i.next_run = (t)->i.prev_run = (t);        \
  36         (t)->i.wait_queue = 0;                          \
  37         (t)->i.private = 0;                             \
  38     } STMT_END
  39
  40 /*
  41  * Note that SCHEDULE() is only callable from pp code (which
  42  * must be expecting to be restarted). We'll have to do
  43  * something a bit different for XS code.
  44  */
  45
  46 #define SCHEDULE() return schedule(), PL_op
  47
  48 #define MUTEX_LOCK(m)
  49 #define MUTEX_UNLOCK(m)
  50 #define MUTEX_INIT(m)
  51 #define MUTEX_DESTROY(m)
  52 #define COND_INIT(c) perl_cond_init(c)
  53 #define COND_SIGNAL(c) perl_cond_signal(c)
  54 #define COND_BROADCAST(c) perl_cond_broadcast(c)
  55 #define COND_WAIT(c, m)         \
  56     STMT_START {                \
  57         perl_cond_wait(c);      \
  58         SCHEDULE();             \
  59     } STMT_END
  60 #define COND_DESTROY(c)
  61
  62 #define THREAD_CREATE(t, f)     f((t))
  63 #define THREAD_POST_CREATE(t)   NOOP
  64
  65 #define YIELD   NOOP