020908d623
adds a state to each threadpool which can be only offline or online. One can not acquire new threads when the pool is offline. no need for waits in the teststuite anymore.
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
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threadpool.h - Manage pools of threads
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Copyright (C) Lumiera.org
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2009, Michael Ploujnikov <ploujj@gmail.com>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef LUMIERA_THREADPOOL_H
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#define LUMIERA_THREADPOOL_H
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//TODO: Support library includes//
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#include "lib/condition.h"
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#include "lib/llist.h"
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//TODO: Forward declarations//
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//TODO: Lumiera header includes//
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#include "threads.h"
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//TODO: System includes//
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#include <nobug.h>
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/**
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* @file
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*
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*/
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//TODO: declarations go here//
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/**
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* Acquire a thread from a threadpool.
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* This may either pick a thread from an appropriate pool or create a new one when the pool is empty.
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* This function doesn't need to be accessible outside of the threadpool implementation.
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*/
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LumieraThread
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lumiera_threadpool_acquire_thread(enum lumiera_thread_class kind,
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const char* purpose,
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struct nobug_flag* flag);
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/**
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* Park a thread
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* This ends up putting a finished thread back on the list of an appropriate threadpool.
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* This function doesn't need to be accessible outside of the threadpool implementation.
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*/
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void
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lumiera_threadpool_release_thread(LumieraThread thread);
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typedef struct lumiera_threadpool_struct lumiera_threadpool;
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typedef lumiera_threadpool* LumieraThreadpool;
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enum lumiera_threadpool_state {
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LUMIERA_THREADPOOL_OFFLINE,
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LUMIERA_THREADPOOL_ONLINE
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};
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struct lumiera_threadpool_struct
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{
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struct
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{
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llist working_list;
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llist idle_list;
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int thread_count;
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int idle_thread_count;
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pthread_attr_t pthread_attrs;
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lumiera_condition sync;
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enum lumiera_threadpool_state status;
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} pool[LUMIERA_THREADCLASS_COUNT];
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};
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/**
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* Initialize the thread pool.
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*/
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void
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lumiera_threadpool_init(void);
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void
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lumiera_threadpool_destroy(void);
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#endif
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/*
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// Local Variables:
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// mode: C
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// c-file-style: "gnu"
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// indent-tabs-mode: nil
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// End:
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*/
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