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https://github.com/ARM-software/arm-trusted-firmware.git
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Manish V Badarkhe
86822f2485
Add a non-blocking `spin_trylock()` function to the existing spinlock implementation. This API attempts to acquire the lock and returns `1` on success or `0` if the lock is already held. It enables conditional locking scenarios where blocking is undesirable. Change-Id: I9483206952d1a34dc245ebf69e80c3645b658946 Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
39 lines
732 B
C
39 lines
732 B
C
/*
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* Copyright (c) 2013-2025, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef SPINLOCK_H
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#define SPINLOCK_H
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#ifndef __ASSEMBLER__
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#include <stdbool.h>
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#include <stdint.h>
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typedef struct spinlock {
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volatile uint32_t lock;
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} spinlock_t;
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typedef struct bitlock {
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volatile uint8_t lock;
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} bitlock_t;
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void spin_lock(spinlock_t *lock);
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void spin_unlock(spinlock_t *lock);
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void bit_lock(bitlock_t *lock, uint8_t mask);
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void bit_unlock(bitlock_t *lock, uint8_t mask);
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bool spin_trylock(spinlock_t *lock);
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#else
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/* Spin lock definitions for use in assembly */
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#define SPINLOCK_ASM_ALIGN 2
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#define SPINLOCK_ASM_SIZE 4
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#endif /* __ASSEMBLER__ */
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#endif /* SPINLOCK_H */
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