358a53cb2f
In addition to more priorities taking more memory to host them, finding the next thread to run when it is not cached is slower since each extra set of 32 priorities maps to a loop iteration. That loop is remove entirely when the number of priorities is less than 32 (31 + the idle thread). Fixes ZEP-1303. Change-Id: I3205df90d379a0f4456ff1d7f1aaa67ad2cddf15 Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
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* Copyright (c) 2010-2012, 2014-2015 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief Architecture-independent private nanokernel APIs
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*
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* This file contains private nanokernel APIs that are not
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* architecture-specific.
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*/
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#ifndef _NANO_INTERNAL__H_
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#define _NANO_INTERNAL__H_
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#define K_NUM_PRIORITIES \
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(CONFIG_NUM_COOP_PRIORITIES + CONFIG_NUM_PREEMPT_PRIORITIES + 1)
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#define K_NUM_PRIO_BITMAPS ((K_NUM_PRIORITIES + 31) >> 5)
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#ifndef _ASMLANGUAGE
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Early boot functions */
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void _bss_zero(void);
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#ifdef CONFIG_XIP
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void _data_copy(void);
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#else
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static inline void _data_copy(void)
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{
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/* Do nothing */
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}
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#endif
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FUNC_NORETURN void _Cstart(void);
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/* helper type alias for thread control structure */
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typedef void (*_thread_entry_t)(void *, void *, void *);
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extern void _thread_entry(void (*)(void *, void *, void *),
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void *, void *, void *);
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extern void _new_thread(char *pStack, size_t stackSize,
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void *uk_task_ptr,
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void (*pEntry)(void *, void *, void *),
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void *p1, void *p2, void *p3,
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int prio, unsigned options);
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/* context switching and scheduling-related routines */
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extern unsigned int _Swap(unsigned int);
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/* set and clear essential fiber/task flag */
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extern void _thread_essential_set(void);
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extern void _thread_essential_clear(void);
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/* clean up when a thread is aborted */
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#if defined(CONFIG_THREAD_MONITOR)
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extern void _thread_monitor_exit(struct k_thread *thread);
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#else
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#define _thread_monitor_exit(thread) \
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do {/* nothing */ \
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} while (0)
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#endif /* CONFIG_THREAD_MONITOR */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ASMLANGUAGE */
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#endif /* _NANO_INTERNAL__H_ */
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