81 lines
3.2 KiB
C
81 lines
3.2 KiB
C
//----------------------------------------------------------------------------//
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// OS on Kaleid //
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// //
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// Desc: Scheduler-related functions //
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// //
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// //
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// Copyright © 2018-2020 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#ifndef _KERNEL_H
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#include <kernel.h>
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#endif
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#ifndef _KALKERN_SCHED_H
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#define _KALKERN_SCHED_H
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//----------------------------------------------------------------------------//
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//
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// Value of the preemption count indicating that preemption is activated
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//
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enum { PREEMPT_ON = 0 };
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// Time in ticks a process should be run
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enum
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{
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DEF_PROC_TSLICE = 3, // 20 ticks
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TCR_PROC_TSLICE = 20000 // 20000 ticks (time critical)
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};
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// Priority classes
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enum
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{
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TIME_CRIT_PROC = 0,
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SERV_PRIO_PROC = 1,
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REGL_PRIO_PROC = 2,
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IDLE_PRIO_PROC = 3,
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};
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// Names of the priority classes
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extern const char *PsPrioClassesNames[];
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//----------------------------------------------------------------------------//
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//
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// Re-scheduling and preemption
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// XXX atomic operations
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//
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#define PsRequestReSched() do { ++KeCurCPU->needReSched; } while (0)
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#define PsDisablePreemption() do { ++KeCurCPU->preemptCount; } while (0)
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#define PsEnablePreemption() do { assert(KeCurCPU->preemptCount > 0); \
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--KeCurCPU->preemptCount; } while(0)
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//----------------------------------------------------------------------------//
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void PsInitSched(void);
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void PsFiniSched(void);
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void PsSchedThisProc(Process_t *);
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void PsSchedOnTick(void);
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//----------------------------------------------------------------------------//
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#endif
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