/*
 * Copyright (c) 2016 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 * @brief Primitive for aborting a thread when an arch-specific one is not
 * needed..
 */

#include <kernel.h>
#include <kernel_structs.h>
#include <kernel_internal.h>
#include <kswap.h>
#include <string.h>
#include <toolchain.h>
#include <linker/sections.h>
#include <wait_q.h>
#include <ksched.h>
#include <misc/__assert.h>
#include <syscall_handler.h>

extern void _k_thread_single_abort(struct k_thread *thread);

#if !defined(CONFIG_ARCH_HAS_THREAD_ABORT)
void _impl_k_thread_abort(k_tid_t thread)
{
	unsigned int key;

	key = irq_lock();

	__ASSERT(!(thread->base.user_options & K_ESSENTIAL),
		 "essential thread aborted");

	_k_thread_single_abort(thread);
	_thread_monitor_exit(thread);

	if (_is_in_isr()) {
		irq_unlock(key);
	} else {
		if (_current == thread) {
			_Swap(key);
			CODE_UNREACHABLE;
		}

		/* The abort handler might have altered the ready queue. */
		_reschedule_threads(key);
	}
}
#endif

#ifdef CONFIG_USERSPACE
_SYSCALL_HANDLER(k_thread_abort, thread_p)
{
	struct k_thread *thread = (struct k_thread *)thread_p;
	_SYSCALL_OBJ(thread, K_OBJ_THREAD);
	_SYSCALL_VERIFY_MSG(!(thread->base.user_options & K_ESSENTIAL),
		"aborting essential thread %p", thread);

	_impl_k_thread_abort((struct k_thread *)thread);
	return 0;
}
#endif