forked from len0rd/rockbox
533d396761
Any number of readers may be in the critical section at a time and writers are mutually exclusive to all other threads. They are a better choice when data is rarely modified but often read and multiple threads can safely access it for reading. Priority inheritance is fully implemented along with other changes to the kernel to fully support it on multiowner objects. This also cleans up priority code in the kernel and updates some associated structures in existing objects to the cleaner form. Currently doesn't add the mrsw_lock.[ch] files since they're not yet needed by anything but the supporting improvements are still useful. This includes a typed bitarray API (bitarray.h) which is pretty basic for now. Change-Id: Idbe43dcd9170358e06d48d00f1c69728ff45b0e3 Reviewed-on: http://gerrit.rockbox.org/801 Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Tested: Michael Sevakis <jethead71@rockbox.org>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Björn Stenberg
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*
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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
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef KERNEL_H
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#define KERNEL_H
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#include "config.h"
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#include "system.h"
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#include "queue.h"
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#include "mutex.h"
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#include "mrsw_lock.h"
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#include "tick.h"
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#ifdef INCLUDE_TIMEOUT_API
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#include "timeout.h"
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#endif
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#ifdef HAVE_SEMAPHORE_OBJECTS
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#include "semaphore.h"
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#endif
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#ifdef HAVE_CORELOCK_OBJECT
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#include "corelock.h"
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#endif
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#define OBJ_WAIT_TIMEDOUT (-1)
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#define OBJ_WAIT_FAILED 0
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#define OBJ_WAIT_SUCCEEDED 1
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#define TIMEOUT_BLOCK -1
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#define TIMEOUT_NOBLOCK 0
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static inline void kernel_init(void)
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{
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/* Init the threading API */
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init_threads();
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/* Other processors will not reach this point in a multicore build.
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* In a single-core build with multiple cores they fall-through and
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* sleep in cop_main without returning. */
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if (CURRENT_CORE == CPU)
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{
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init_queues();
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init_tick();
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#ifdef KDEV_INIT
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kernel_device_init();
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#endif
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}
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}
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#endif /* KERNEL_H */
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