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osal/none: add nested count to spin lock #3151

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osal/none: add nested count to spin lock #3151

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10 changes: 8 additions & 2 deletions src/osal/osal_none.h
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Original file line number Diff line number Diff line change
Expand Up @@ -45,11 +45,12 @@ TU_ATTR_WEAK void osal_task_delay(uint32_t msec);
//--------------------------------------------------------------------+
typedef struct {
void (* interrupt_set)(bool);
uint32_t nested_count;
} osal_spinlock_t;

// For SMP, spinlock must be locked by hardware, cannot just use interrupt
#define OSAL_SPINLOCK_DEF(_name, _int_set) \
osal_spinlock_t _name = { .interrupt_set = _int_set }
osal_spinlock_t _name = { .interrupt_set = _int_set, .nested_count = 0 }

TU_ATTR_ALWAYS_INLINE static inline void osal_spin_init(osal_spinlock_t *ctx) {
(void) ctx;
Expand All @@ -59,11 +60,16 @@ TU_ATTR_ALWAYS_INLINE static inline void osal_spin_lock(osal_spinlock_t *ctx, bo
if (!in_isr) {
ctx->interrupt_set(false);
}
ctx->nested_count++;
}

TU_ATTR_ALWAYS_INLINE static inline void osal_spin_unlock(osal_spinlock_t *ctx, bool in_isr) {
TU_ASSERT(ctx->nested_count,);
ctx->nested_count--;
if (!in_isr) {
ctx->interrupt_set(true);
if (ctx->nested_count == 0) {
ctx->interrupt_set(true);
}
}
}

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