mirror of
https://github.com/Rockbox/rockbox.git
synced 2025-10-14 02:27:39 -04:00
6ed00870ab
Abstracts threading from itself a bit, changes the way its queues are handled and does type hiding for that as well. Do alot here due to already required major brain surgery. Threads may now be on a run queue and a wait queue simultaneously so that the expired timer only has to wake the thread but not remove it from the wait queue which simplifies the implicit wake handling. List formats change for wait queues-- doubly-linked, not circular. Timeout queue is now singly-linked. The run queue is still circular as before. Adds a better thread slot allocator that may keep the slot marked as used regardless of the thread state. Assists in dumping special tasks that switch_thread was tasked to perform (blocking tasks). Deletes alot of code yet surprisingly, gets larger than expected. Well, I'm not not minding that for the time being-- omlettes and break a few eggs and all that. Change-Id: I0834d7bb16b2aecb2f63b58886eeda6ae4f29d59
54 lines
2 KiB
C
54 lines
2 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2002 by Björn Stenberg
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef MUTEX_H
|
|
#define MUTEX_H
|
|
|
|
#include "thread.h"
|
|
|
|
struct mutex
|
|
{
|
|
struct __wait_queue queue; /* waiter list */
|
|
int recursion; /* lock owner recursion count */
|
|
struct blocker blocker; /* priority inheritance info
|
|
for waiters and owner*/
|
|
IF_COP( struct corelock cl; ) /* multiprocessor sync */
|
|
#ifdef HAVE_PRIORITY_SCHEDULING
|
|
bool no_preempt;
|
|
#endif
|
|
};
|
|
|
|
extern void mutex_init(struct mutex *m);
|
|
extern void mutex_lock(struct mutex *m);
|
|
extern void mutex_unlock(struct mutex *m);
|
|
#ifdef HAVE_PRIORITY_SCHEDULING
|
|
/* Deprecated temporary function to disable mutex preempting a thread on
|
|
* unlock - firmware/drivers/fat.c and a couple places in apps/buffering.c -
|
|
* reliance on it is a bug! */
|
|
static inline void mutex_set_preempt(struct mutex *m, bool preempt)
|
|
{ m->no_preempt = !preempt; }
|
|
#else
|
|
/* Deprecated but needed for now - firmware/drivers/ata_mmc.c */
|
|
static inline bool mutex_test(const struct mutex *m)
|
|
{ return m->blocker.thread != NULL; }
|
|
#endif /* HAVE_PRIORITY_SCHEDULING */
|
|
|
|
#endif /* MUTEX_H */
|