mirror of
https://gitlab.os-k.eu/os-k-team/os-k.git
synced 2023-08-25 14:03:10 +02:00
75 lines
2.8 KiB
C
75 lines
2.8 KiB
C
//----------------------------------------------------------------------------//
|
|
// GNU GPL OS/K //
|
|
// //
|
|
// Desc: Spinlocks //
|
|
// //
|
|
// //
|
|
// Copyright © 2018-2019 The OS/K Team //
|
|
// //
|
|
// This file is part of OS/K. //
|
|
// //
|
|
// OS/K 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 3 of the License, or //
|
|
// any later version. //
|
|
// //
|
|
// OS/K is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
|
|
//----------------------------------------------------------------------------//
|
|
|
|
#ifndef _KERNEL_H
|
|
#include <kernel.h>
|
|
#endif
|
|
|
|
#ifndef _KALKERN_SPINLOCK_H
|
|
#define _KALKERN_SPINLOCK_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
//----------------------------------------------------------------------------//
|
|
|
|
static inline void KeInitSpinlock(Spinlock_t *lock) { *lock = 0; }
|
|
|
|
static inline void KeAcquireSpinlockIRQ(Spinlock_t *lock)
|
|
{
|
|
while (1) {
|
|
if (!atomic_xchg_64(lock, (void *)1)) return;
|
|
while (*lock) __relax_cpu();
|
|
}
|
|
}
|
|
|
|
static inline void KeAcquireSpinlock(Spinlock_t *lock)
|
|
{
|
|
while (1) {
|
|
if (!atomic_xchg_64(lock, KeCurThread)) return;
|
|
while (*lock) __relax_cpu();
|
|
}
|
|
}
|
|
|
|
static inline void KeReleaseSpinlock(Spinlock_t *lock)
|
|
{
|
|
atomic_barrier();
|
|
assert(*lock == (ulong)KeCurThread);
|
|
*lock = 0;
|
|
}
|
|
|
|
static inline ulong KeTestSpinLock(Spinlock_t *lock)
|
|
{
|
|
return (ulong)atomic_xchg_64(lock, KeCurThread);
|
|
}
|
|
|
|
//------------------------------------------//
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|