/SPARTAN/trunk/src/synch/rwlock.c |
---|
1,8 → 1,4 |
/* |
* Reader/Writer locks |
*/ |
/* |
* Copyright (C) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
30,7 → 26,12 |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/* |
* Reader/Writer locks |
*/ |
/* |
* These locks are not recursive. |
* Neither readers nor writers will suffer starvation. |
* |
/SPARTAN/trunk/src/synch/spinlock.c |
---|
29,6 → 29,7 |
#include <arch.h> |
#include <arch/atomic.h> |
#include <arch/barrier.h> |
#include <synch/spinlock.h> |
#ifdef __SMP__ |
50,6 → 51,7 |
i = 0; |
} |
} |
CS_ENTER_BARRIER(); |
} |
#else |
60,16 → 62,23 |
* implementation of spinlock. |
*/ |
spinlock_arch(&sl->val); |
CS_ENTER_BARRIER(); |
} |
#endif |
int spinlock_trylock(spinlock_t *sl) |
{ |
return !test_and_set(&sl->val); |
int rc; |
rc = !test_and_set(&sl->val); |
CS_ENTER_BARRIER(); |
return rc; |
} |
void spinlock_unlock(spinlock_t *sl) |
{ |
CS_LEAVE_BARRIER(); |
sl->val = 0; |
} |
/SPARTAN/trunk/arch/ia64/include/barrier.h |
---|
0,0 → 1,35 |
/* |
* Copyright (C) 2005 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __ia64_BARRIER_H__ |
#define __ia64_BARRIER_H__ |
#define CS_ENTER_BARRIER() __asm__ volatile ("" ::: "memory") |
#define CS_LEAVE_BARRIER() __asm__ volatile ("" ::: "memory") |
#endif |
/SPARTAN/trunk/arch/mips/include/barrier.h |
---|
0,0 → 1,35 |
/* |
* Copyright (C) 2005 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __mips_BARRIER_H__ |
#define __mips_BARRIER_H__ |
#define CS_ENTER_BARRIER() __asm__ volatile ("" ::: "memory") |
#define CS_LEAVE_BARRIER() __asm__ volatile ("" ::: "memory") |
#endif |
/SPARTAN/trunk/arch/ia32/include/barrier.h |
---|
0,0 → 1,46 |
/* |
* Copyright (C) 2005 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __ia32_BARRIER_H__ |
#define __ia32_BARRIER_H__ |
/* |
* NOTE: |
* No barriers for critical section (i.e. spinlock) on IA-32 are needed: |
* - spinlock_lock() and spinlock_trylock() use serializing XCHG instruction |
* - writes cannot pass reads on IA-32 => spinlock_unlock() needs no barriers |
*/ |
/* |
* Provisions are made to prevent compiler from reordering instructions itself. |
*/ |
#define CS_ENTER_BARRIER() __asm__ volatile ("" ::: "memory") |
#define CS_LEAVE_BARRIER() __asm__ volatile ("" ::: "memory") |
#endif |