libgomp/config/posix/pool.h

   1 /* Copyright (C) 2005-2015 Free Software Foundation, Inc.
   2    Contributed by Sebastian Huber <sebastian.huber@embedded-brains.de>.
   3
   4    This file is part of the GNU Offloading and Multi Processing Library
   5    (libgomp).
   6
   7    Libgomp is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
  13    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  14    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15    more details.
  16
  17    Under Section 7 of GPL version 3, you are granted additional
  18    permissions described in the GCC Runtime Library Exception, version
  19    3.1, as published by the Free Software Foundation.
  20
  21    You should have received a copy of the GNU General Public License and
  22    a copy of the GCC Runtime Library Exception along with this program;
  23    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24    <http://www.gnu.org/licenses/>.  */
  25
  26 /* This is the default implementation of the thread pool management
  27    for libgomp.  This type is private to the library.  */
  28
  29 #ifndef GOMP_POOL_H
  30 #define GOMP_POOL_H 1
  31
  32 #include "libgomp.h"
  33
  34 /* Get the thread pool, allocate and initialize it on demand.  */
  35
  36 static inline struct gomp_thread_pool *
  37 gomp_get_thread_pool (struct gomp_thread *thr, unsigned nthreads)
  38 {
  39   struct gomp_thread_pool *pool = thr->thread_pool;
  40   if (__builtin_expect (pool == NULL, 0))
  41     {
  42       pool = gomp_malloc (sizeof (*pool));
  43       pool->threads = NULL;
  44       pool->threads_size = 0;
  45       pool->threads_used = 0;
  46       pool->last_team = NULL;
  47       pool->threads_busy = nthreads;
  48       thr->thread_pool = pool;
  49       pthread_setspecific (gomp_thread_destructor, thr);
  50     }
  51   return pool;
  52 }
  53
  54 static inline void
  55 gomp_release_thread_pool (struct gomp_thread_pool *pool)
  56 {
  57   /* Do nothing in the default implementation.  */
  58 }
  59
  60 #endif /* GOMP_POOL_H */