95 lines
2.4 KiB
C
95 lines
2.4 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
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the 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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/** @file threadpool.h
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** @todo development in this area is stalled since 2010
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*/
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#ifndef BACKEND_THREADPOOL_H
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#define BACKEND_THREADPOOL_H
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#include "lib/condition.h"
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#include "lib/llist.h"
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#include "threads.h"
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#include <nobug.h>
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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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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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/** Initialise the thread pool. */
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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 /*BACKEND_THREADPOOL_H*/
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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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