/******************************************************************************** * include/sched.h * * Copyright (C) 2007-2009, 2011, 2013, 2015 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ********************************************************************************/ #ifndef __INCLUDE_SCHED_H #define __INCLUDE_SCHED_H /******************************************************************************** * Included Files ********************************************************************************/ #include #include #include #include #include /******************************************************************************** * Pre-processor Definitions ********************************************************************************/ /* Task Management Definitions **************************************************/ /* POSIX-like scheduling policies */ #define SCHED_FIFO 1 /* FIFO priority scheduling policy */ #define SCHED_RR 2 /* Round robin scheduling policy */ #define SCHED_SPORADIC 3 /* Sporadic scheduling policy */ #define SCHED_OTHER 4 /* Not supported */ /* Maximum number of SCHED_SPORADIC replenishments */ #define SS_REPL_MAX CONFIG_SCHED_SPORADIC_MAXREPL /* Pthread definitions **********************************************************/ #define PTHREAD_KEYS_MAX CONFIG_NPTHREAD_KEYS /* CPU affinity mask helpers ***************************************************/ /* These are not standard but are defined for Linux compatibility */ #ifdef CONFIG_SMP /* void CPU_ZERO(FAR cpu_set_t *set); */ # define CPU_ZERO(s) do { *(s) = 0; } while (0) /* void CPU_SET(int cpu, FAR cpu_set_t *set); */ # define CPU_SET(c,s) do { *(s) |= (1 << (c)); } while (0) /* void CPU_CLR(int cpu, FAR cpu_set_t *set); */ # define CPU_CLR(c,s) do { *(s) &= ~(1 << (c)); } while (0) /* int CPU_ISSET(int cpu, FAR const cpu_set_t *set); */ # define CPU_ISSET(c,s) ((*(s) & (1 << (c))) != 0) /* int CPU_COUNT(FAR const cpu_set_t *set); */ # define CPU_COUNT(s) sched_cpu_count(s) /* void CPU_AND(FAR cpu_set_t *destset, FAR const cpu_set_t *srcset1, * FAR const cpu_set_t *srcset2); */ # define CPU_AND(d,s1,s2) do { *(d) = *(s1) & *(s2); } while (0) /* void CPU_OR(FAR cpu_set_t *destset, FAR const cpu_set_t *srcset1, * FAR const cpu_set_t *srcset2); */ # define CPU_OR(d,s1,s2) do { *(d) = *(s1) | *(s2); } while (0) /* void CPU_XOR(FAR cpu_set_t *destset, FAR const cpu_set_t *srcset1, * FAR const cpu_set_t *srcset2); */ # define CPU_XOR(d,s1,s2) do { *(d) = *(s1) ^ *(s2); } while (0) /* int CPU_EQUAL(FAR const cpu_set_t *set1, FAR const cpu_set_t *set2); */ # define CPU_EQUAL(s1,s2) (*(s2) == *(s2)) /* REVISIT: Variably sized CPU sets are not supported */ /* FAR cpu_set_t *CPU_ALLOC(int num_cpus); */ # define CPU_ALLOC(n) (FAR cpu_set_t *)malloc(sizeof(cpu_set_t)); /* void CPU_FREE(cpu_set_t *set); */ # define CPU_ALLOC(s) free(s) /* size_t CPU_ALLOC_SIZE(int num_cpus); */ # define CPU_ALLOC_SIZE(n) sizeof(cpu_set_t) /* void CPU_ZERO_S(size_t setsize, FAR cpu_set_t *set); */ # define CPU_ZERO_S(n,s) CPU_ZERO_S(s) /* void CPU_SET_S(int cpu, size_t setsize, FAR cpu_set_t *set); */ # define CPU_SET_S(c,n,s) CPU_SET(c,s) /* void CPU_CLR_S(int cpu, size_t setsize, FAR cpu_set_t *set); */ # define CPU_CLR_S(c,n,s) CPU_CLR(c,s) /* int CPU_ISSET_S(int cpu, size_t setsize, FAR const cpu_set_t *set); */ # define CPU_ISSET_S(c,n,s) CPU_ISSET(c,s) /* int CPU_COUNT_S(size_t setsize, FAR const cpu_set_t *set); */ # define CPU_COUNT_S(n,s) CPU_COUNT(s) /* void CPU_AND_S(size_t setsize, FAR cpu_set_t *destset, * FAR const cpu_set_t *srcset1, * FAR const cpu_set_t *srcset2); */ # define CPU_AND_S(n,d,s1,s2) CPU_AND(d,s1,s2) /* void CPU_OR_S(size_t setsize, FAR cpu_set_t *destset, * FAR const cpu_set_t *srcset1, * FAR const cpu_set_t *srcset2); */ # define CPU_OR_S(n,d,s1,s2) CPU_OR(d,s1,s2) /* void CPU_XOR_S(size_t setsize, FAR cpu_set_t *destset, * FAR const cpu_set_t *srcset1, * FAR const cpu_set_t *srcset2); */ # define CPU_XOR_S(n,d,s1,s2) CPU_XOR(d,s1,s2) /* int CPU_EQUAL_S(size_t setsize, FAR const cpu_set_t *set1, * FAR const cpu_set_t *set2); */ # define CPU_EQUAL_S(n,s1,s2) CPU_EQUAL(s1,s2) #endif /* CONFIG_SMP */ /******************************************************************************** * Public Type Definitions ********************************************************************************/ /* This is the POSIX-like scheduling parameter structure */ struct sched_param { int sched_priority; /* Base thread priority */ #ifdef CONFIG_SCHED_SPORADIC int sched_ss_low_priority; /* Low scheduling priority for sporadic * server */ struct timespec sched_ss_repl_period; /* Replenishment period for sporadic * server. */ struct timespec sched_ss_init_budget; /* Initial budget for sporadic server */ int sched_ss_max_repl; /* Maximum pending replenishments for * sporadic server. */ #endif }; /******************************************************************************** * Public Data ********************************************************************************/ #ifndef __ASSEMBLY__ #undef EXTERN #if defined(__cplusplus) #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /******************************************************************************** * Public Function Prototypes ********************************************************************************/ /* Task Control Interfaces (non-standard) */ int task_init(FAR struct tcb_s *tcb, const char *name, int priority, FAR uint32_t *stack, uint32_t stack_size, main_t entry, FAR char * const argv[]); int task_activate(FAR struct tcb_s *tcb); #ifndef CONFIG_BUILD_KERNEL int task_create(FAR const char *name, int priority, int stack_size, main_t entry, FAR char * const argv[]); #endif int task_delete(pid_t pid); int task_restart(pid_t pid); /* Task Scheduling Interfaces (based on POSIX APIs) */ int sched_setparam(pid_t pid, const struct sched_param *param); int sched_getparam(pid_t pid, struct sched_param *param); int sched_setscheduler(pid_t pid, int policy, FAR const struct sched_param *param); int sched_getscheduler(pid_t pid); int sched_yield(void); int sched_get_priority_max(int policy); int sched_get_priority_min(int policy); int sched_rr_get_interval(pid_t pid, FAR struct timespec *interval); #ifdef CONFIG_SMP /* Task affinity */ int sched_setaffinity(pid_t pid, size_t cpusetsize, FAR const cpu_set_t *mask); int sched_getaffinity(pid_t pid, size_t cpusetsize, FAR cpu_set_t *mask); int sched_cpu_count(FAR const cpu_set_t *set); #endif /* CONFIG_SMP */ /* Task Switching Interfaces (non-standard) */ int sched_lock(void); int sched_unlock(void); int sched_lockcount(void); /* Queries */ bool sched_idletask(void); #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __ASSEMBLY__ */ #endif /* __INCLUDE_SCHED_H */