| /* |
| * Copyright (c) 2014 Travis Geiselbrecht |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files |
| * (the "Software"), to deal in the Software without restriction, |
| * including without limitation the rights to use, copy, modify, merge, |
| * publish, distribute, sublicense, and/or sell copies of the Software, |
| * and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| #pragma once |
| |
| #include <compiler.h> |
| #include <arch/spinlock.h> |
| |
| __BEGIN_CDECLS |
| |
| /* interrupts should already be disabled */ |
| static inline void spin_lock(spin_lock_t *lock) |
| { |
| arch_spin_lock(lock); |
| } |
| |
| /* Returns 0 on success, non-0 on failure */ |
| static inline int spin_trylock(spin_lock_t *lock) |
| { |
| return arch_spin_trylock(lock); |
| } |
| |
| /* interrupts should already be disabled */ |
| static inline void spin_unlock(spin_lock_t *lock) |
| { |
| arch_spin_unlock(lock); |
| } |
| |
| static inline void spin_lock_init(spin_lock_t *lock) |
| { |
| arch_spin_lock_init(lock); |
| } |
| |
| static inline bool spin_lock_held(spin_lock_t *lock) |
| { |
| return arch_spin_lock_held(lock); |
| } |
| |
| /* spin lock irq save flags: */ |
| |
| /* Possible future flags: |
| * SPIN_LOCK_FLAG_PMR_MASK = 0x000000ff |
| * SPIN_LOCK_FLAG_PREEMPTION = 0x00000100 |
| * SPIN_LOCK_FLAG_SET_PMR = 0x00000200 |
| */ |
| |
| /* Generic flags */ |
| #define SPIN_LOCK_FLAG_INTERRUPTS ARCH_DEFAULT_SPIN_LOCK_FLAG_INTERRUPTS |
| |
| /* same as spin lock, but save disable and save interrupt state first */ |
| static inline void spin_lock_save( |
| spin_lock_t *lock, |
| spin_lock_saved_state_t *statep, |
| spin_lock_save_flags_t flags) |
| { |
| arch_interrupt_save(statep, flags); |
| spin_lock(lock); |
| } |
| |
| /* restore interrupt state before unlocking */ |
| static inline void spin_unlock_restore( |
| spin_lock_t *lock, |
| spin_lock_saved_state_t old_state, |
| spin_lock_save_flags_t flags) |
| { |
| spin_unlock(lock); |
| arch_interrupt_restore(old_state, flags); |
| } |
| |
| /* hand(ier) routines */ |
| #define spin_lock_irqsave(lock, statep) spin_lock_save(lock, &(statep), SPIN_LOCK_FLAG_INTERRUPTS) |
| #define spin_unlock_irqrestore(lock, statep) spin_unlock_restore(lock, statep, SPIN_LOCK_FLAG_INTERRUPTS) |
| |
| __END_CDECLS |