arch_inlines.h

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/*
 * Copyright (c) 2024 Meta Platforms.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_ZEPHYR_ARCH_COMMON_ARCH_INLINES_H_
#define ZEPHYR_INCLUDE_ZEPHYR_ARCH_COMMON_ARCH_INLINES_H_
 
#ifndef ZEPHYR_INCLUDE_ARCH_INLINES_H_
#error "This header shouldn't be included directly"
#endif /* ZEPHYR_INCLUDE_ARCH_INLINES_H_ */
 
#ifndef _ASMLANGUAGE
 
#include <zephyr/kernel_structs.h>
 
#ifndef CONFIG_ARCH_HAS_CUSTOM_CURRENT_IMPL
static ALWAYS_INLINE struct k_thread *arch_current_thread(void)
{
#ifdef CONFIG_SMP
        /* In SMP, arch_current_thread() is a field read from _current_cpu, which
         * can race with preemption before it is read.  We must lock
         * local interrupts when reading it.
         */
        unsigned int k = arch_irq_lock();
 
        struct k_thread *ret = _current_cpu->current;
 
        arch_irq_unlock(k);
#else
        struct k_thread *ret = _kernel.cpus[0].current;
#endif /* CONFIG_SMP */
        return ret;
}
 
static ALWAYS_INLINE void arch_current_thread_set(struct k_thread *thread)
{
        _current_cpu->current = thread;
}
#endif /* CONFIG_ARCH_HAS_CUSTOM_CURRENT_IMPL */
 
#endif /* _ASMLANGUAGE */
 
#endif /* ZEPHYR_INCLUDE_ZEPHYR_ARCH_COMMON_ARCH_INLINES_H_ */