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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (C) 2026 Richard Qin */
#pragma once
/*
* Per-CPU Interrupt Nesting Tracker
*
* Tracks spinlock nesting depth on each CPU to ensure interrupts
* are only restored when the last spinlock is released.
*
* BSS-segment global array; zero-initialized by entry.S BSS clear.
* Reference: docs/specs/spinlock.md §3.1
*/
#include <lume/types.h>
namespace sync {
struct CpuSyncState {
int lock_depth; // Number of spinlocks held by this CPU
bool intr_was_on; // Were interrupts enabled before the first lock?
};
inline constexpr uint64 kInvalidCpuId = ~0ULL;
// BSS-segment global array, zero-initialized by entry.S
extern CpuSyncState g_cpu_sync_states[kMaxCPUs];
// Internal API — called only by Spinlock::acquire/release
void push_intr();
void pop_intr();
} // namespace sync
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