ksrc/skins/posix/internal.h

00001 /*
00002  * Written by Gilles Chanteperdrix <gilles.chanteperdrix@laposte.net>.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License as
00006  * published by the Free Software Foundation; either version 2 of the
00007  * License, or (at your option) any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017  */
00018 
00019 #ifndef _POSIX_INTERNAL_H
00020 #define _POSIX_INTERNAL_H
00021 
00022 #include <nucleus/xenomai.h>
00023 #include <nucleus/core.h>
00024 #include <nucleus/ppd.h>
00025 #include <nucleus/select.h>
00026 #include <posix/posix.h>
00027 #include <posix/registry.h>
00028 
00029 /* debug support */
00030 #include <nucleus/assert.h>
00031 
00032 #ifndef CONFIG_XENO_OPT_DEBUG_POSIX
00033 #define CONFIG_XENO_OPT_DEBUG_POSIX 0
00034 #endif
00035 
00036 #define PSE51_MAGIC(n) (0x8686##n##n)
00037 #define PSE51_ANY_MAGIC         PSE51_MAGIC(00)
00038 #define PSE51_THREAD_MAGIC      PSE51_MAGIC(01)
00039 #define PSE51_THREAD_ATTR_MAGIC PSE51_MAGIC(02)
00040 #define PSE51_MUTEX_MAGIC       PSE51_MAGIC(03)
00041 #define PSE51_MUTEX_ATTR_MAGIC  (PSE51_MAGIC(04) & ((1 << 24) - 1))
00042 #define PSE51_COND_MAGIC        PSE51_MAGIC(05)
00043 #define PSE51_COND_ATTR_MAGIC   (PSE51_MAGIC(05) & ((1 << 24) - 1))
00044 #define PSE51_SEM_MAGIC         PSE51_MAGIC(06)
00045 #define PSE51_KEY_MAGIC         PSE51_MAGIC(07)
00046 #define PSE51_ONCE_MAGIC        PSE51_MAGIC(08)
00047 #define PSE51_MQ_MAGIC          PSE51_MAGIC(09)
00048 #define PSE51_MQD_MAGIC         PSE51_MAGIC(0A)
00049 #define PSE51_INTR_MAGIC        PSE51_MAGIC(0B)
00050 #define PSE51_NAMED_SEM_MAGIC   PSE51_MAGIC(0C)
00051 #define PSE51_TIMER_MAGIC       PSE51_MAGIC(0D)
00052 #define PSE51_SHM_MAGIC         PSE51_MAGIC(0E)
00053 
00054 #define PSE51_MIN_PRIORITY      XNCORE_LOW_PRIO
00055 #define PSE51_MAX_PRIORITY      XNCORE_HIGH_PRIO
00056 
00057 #define ONE_BILLION             1000000000
00058 
00059 #define pse51_obj_active(h,m,t)                 \
00060         ((h) && ((t *)(h))->magic == (m))
00061 
00062 #define pse51_obj_deleted(h,m,t)                \
00063         ((h) && ((t *)(h))->magic == ~(m))
00064 
00065 #define pse51_mark_deleted(t) ((t)->magic = ~(t)->magic)
00066 
00067 typedef struct {
00068         xnqueue_t condq;
00069         xnqueue_t intrq;
00070         xnqueue_t mutexq;
00071         xnqueue_t semq;
00072         xnqueue_t threadq;
00073         xnqueue_t timerq;
00074 } pse51_kqueues_t;
00075 
00076 #ifdef CONFIG_XENO_OPT_PERVASIVE
00077 typedef struct {
00078         pse51_kqueues_t kqueues;
00079         pse51_assocq_t uqds;
00080         pse51_assocq_t usems;
00081         pse51_assocq_t umaps;
00082         pse51_assocq_t ufds;
00083 
00084         xnshadow_ppd_t ppd;
00085 
00086 #define ppd2queues(addr)                                                \
00087         ((pse51_queues_t *) ((char *) (addr) - offsetof(pse51_queues_t, ppd)))
00088 
00089 } pse51_queues_t;
00090 
00091 extern int pse51_muxid;
00092 #endif /* CONFIG_XENO_OPT_PERVASIVE */
00093 
00094 extern xntbase_t *pse51_tbase;
00095 
00096 extern pse51_kqueues_t pse51_global_kqueues;
00097 
00098 #ifdef CONFIG_XENO_OPT_PERVASIVE
00099 static inline pse51_queues_t *pse51_queues(void)
00100 {
00101         xnshadow_ppd_t *ppd;
00102         spl_t s;
00103 
00104         xnlock_get_irqsave(&nklock, s);
00105 
00106         ppd = xnshadow_ppd_get(pse51_muxid);
00107         
00108         xnlock_put_irqrestore(&nklock, s);
00109 
00110         if (!ppd)
00111                 return NULL;
00112 
00113         return ppd2queues(ppd);
00114 }
00115 #endif /* CONFIG_XENO_OPT_PERVASIVE */
00116 
00117 static inline pse51_kqueues_t *pse51_kqueues(int pshared)
00118 {
00119 #ifdef CONFIG_XENO_OPT_PERVASIVE
00120         xnshadow_ppd_t *ppd;
00121 
00122         if (pshared || !(ppd = xnshadow_ppd_get(pse51_muxid)))
00123                 return &pse51_global_kqueues;
00124 
00125         return &ppd2queues(ppd)->kqueues;
00126 #else /* !CONFIG_XENO_OPT_PERVASIVE */
00127         return &pse51_global_kqueues;
00128 #endif /* !CONFIG_XENO_OPT_PERVASIVE */
00129 }
00130 
00131 static inline void ticks2ts(struct timespec *ts, xnticks_t ticks)
00132 {
00133         ts->tv_sec = xnarch_uldivrem(xntbase_ticks2ns(pse51_tbase, ticks),
00134                                      ONE_BILLION, &ts->tv_nsec);
00135 }
00136 
00137 static inline xnticks_t ts2ticks_floor(const struct timespec *ts)
00138 {
00139         xntime_t nsecs = ts->tv_nsec;
00140         if(ts->tv_sec)
00141                 nsecs += (xntime_t) ts->tv_sec * ONE_BILLION;
00142         return xntbase_ns2ticks(pse51_tbase, nsecs);
00143 }
00144 
00145 static inline xnticks_t ts2ticks_ceil(const struct timespec *ts)
00146 {
00147         xntime_t nsecs = ts->tv_nsec;
00148         unsigned long rem;
00149         xnticks_t ticks;
00150         if(ts->tv_sec)
00151                 nsecs += (xntime_t) ts->tv_sec * ONE_BILLION;
00152         ticks = xnarch_ulldiv(nsecs, xntbase_get_tickval(pse51_tbase), &rem);
00153         return rem ? ticks+1 : ticks;
00154 }
00155 
00156 static inline xnticks_t tv2ticks_ceil(const struct timeval *tv)
00157 {
00158         xntime_t nsecs = tv->tv_usec * 1000;
00159         unsigned long rem;
00160         xnticks_t ticks;
00161         if(tv->tv_sec)
00162                 nsecs += (xntime_t) tv->tv_sec * ONE_BILLION;
00163         ticks = xnarch_ulldiv(nsecs, xntbase_get_tickval(pse51_tbase), &rem);
00164         return rem ? ticks+1 : ticks;
00165 }
00166 
00167 static inline void ticks2tv(struct timeval *tv, xnticks_t ticks)
00168 {
00169         unsigned long nsecs;
00170         tv->tv_sec = xnarch_uldivrem(xntbase_ticks2ns(pse51_tbase, ticks),
00171                                      ONE_BILLION,
00172                                      &nsecs);
00173         tv->tv_usec = nsecs / 1000;
00174 }
00175 
00176 static inline xnticks_t clock_get_ticks(clockid_t clock_id)
00177 {
00178         if(clock_id == CLOCK_REALTIME)
00179                 return xntbase_get_time(pse51_tbase);
00180         else
00181                 return xntbase_get_jiffies(pse51_tbase);
00182 }
00183 
00184 static inline int clock_flag(int flag, clockid_t clock_id)
00185 {
00186         switch(flag & TIMER_ABSTIME) {
00187         case 0:
00188                 return XN_RELATIVE;
00189 
00190         case TIMER_ABSTIME:
00191                 switch(clock_id) {
00192                 case CLOCK_MONOTONIC:
00193                         return XN_ABSOLUTE;
00194 
00195                 case CLOCK_REALTIME:
00196                         return XN_REALTIME;
00197                 }
00198         }
00199         return -EINVAL;
00200 }
00201 
00202 int pse51_mq_select_bind(mqd_t fd, struct xnselector *selector,
00203                          unsigned type, unsigned index);
00204 
00205 #endif /* !_POSIX_INTERNAL_H */

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