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spinlock: introduce helpers that clear & restore interrupts

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These are just wrappers around acquire/release that clear and restore
interrupts respectively.
This commit is contained in:
8infy
2024-09-01 19:41:57 +03:00
parent f93470be2a
commit 7136e96fdb
1 changed files with 12 additions and 0 deletions
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kernel-src/include/spinlock.h
+12
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@@ -2,6 +2,7 @@
#define _SPINLOCK_H #define _SPINLOCK_H
#include <stdbool.h> #include <stdbool.h>
#include <kernel/interrupt.h>
typedef int spinlock_t; typedef int spinlock_t;
@@ -11,6 +12,12 @@ static inline void spinlock_acquire(spinlock_t *lock){
while(!__sync_bool_compare_and_swap(lock, 0, 1)) asm("pause"); while(!__sync_bool_compare_and_swap(lock, 0, 1)) asm("pause");
} }
static inline bool spinlock_acquireirqclear(spinlock_t *lock){
bool ret = interrupt_set(false);
spinlock_acquire(lock);
return ret;
}
static inline bool spinlock_try(spinlock_t *lock){ static inline bool spinlock_try(spinlock_t *lock){
return __sync_bool_compare_and_swap(lock, 0, 1); return __sync_bool_compare_and_swap(lock, 0, 1);
} }
@@ -19,4 +26,9 @@ static inline void spinlock_release(spinlock_t *lock){
*lock = 0; *lock = 0;
} }
static inline void spinlock_releaseirqrestore(spinlock_t *lock, bool irqstate){
spinlock_release(lock);
interrupt_set(irqstate);
}
#endif #endif