7cdf40541b
Traditionally threads have been initialized with a PRESTART flag set, which gets cleared when the thread runs for the first time via either its timeout or the k_thread_start() API. But if you think about it, this is no different, semantically, than SUSPENDED: the thread is prevented from running until the flag is cleared. So unify the two. Start threads in the SUSPENDED state, point everyone looking at the PRESTART bit to the SUSPENDED flag, and make k_thread_start() be a synonym for k_thread_resume(). There is some mild code size savings from the eliminated duplication, but the real win here is that we make space in the thread flags byte, which had run out. Signed-off-by: Andy Ross <andyross@google.com>
46 lines
710 B
C
46 lines
710 B
C
/*
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* Copyright (c) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <ksched.h>
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#include <cmsis_os.h>
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#include <kernel_internal.h>
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/**
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* @brief Get the RTOS kernel system timer counter
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*/
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uint32_t osKernelSysTick(void)
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{
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return k_cycle_get_32();
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}
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/**
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* @brief Initialize the RTOS Kernel for creating objects.
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*/
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osStatus osKernelInitialize(void)
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{
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return osOK;
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}
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/**
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* @brief Start the RTOS Kernel.
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*/
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osStatus osKernelStart(void)
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{
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if (k_is_in_isr()) {
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return osErrorISR;
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}
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return osOK;
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}
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/**
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* @brief Check if the RTOS kernel is already started.
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*/
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int32_t osKernelRunning(void)
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{
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return !z_is_thread_suspended(&z_main_thread);
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}
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