# rtai_rwl.h

    00001 /*
    00002  * Copyright (C) 1999-2003 Paolo Mantegazza <mantegazza@aero.polimi.it>
    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 _RTAI_RWL_H
    00020 #define _RTAI_RWL_H
    00021
    00022 #include <rtai_sem.h>
    00023
    00024 struct rtai_rwlock;
    00025
    00026 #ifdef __KERNEL__
    00027
    00028 #ifndef __cplusplus
    00029
    00030 typedef struct rtai_rwlock {
    00031     SEM wrmtx,
    00032         wrsem,
    00033         rdsem;
    00034 } RWL;
    00035
    00036 #else /* __cplusplus */
    00037 extern "C" {
    00038 #endif /* !__cplusplus */
    00039
    00040 int rt_rwl_init(struct rtai_rwlock *rwl);
    00041
    00042 int rt_rwl_delete(struct rtai_rwlock *rwl);
    00043
    00044 int rt_rwl_rdlock(struct rtai_rwlock *rwl);
    00045
    00046 int rt_rwl_rdlock_if(struct rtai_rwlock *rwl);
    00047
    00048 int rt_rwl_rdlock_until(struct rtai_rwlock *rwl,
    00049                         RTIME time);
    00050
    00051 int rt_rwl_rdlock_timed(struct rtai_rwlock *rwl,
    00052                         RTIME delay);
    00053
    00054 int rt_rwl_wrlock(struct rtai_rwlock *rwl);
    00055
    00056 int rt_rwl_wrlock_if(struct rtai_rwlock *rwl);
    00057
    00058 int rt_rwl_wrlock_until(struct rtai_rwlock *rwl,
    00059                         RTIME time);
    00060
    00061 int rt_rwl_wrlock_timed(struct rtai_rwlock *rwl,
    00062                         RTIME delay);
    00063
    00064 int rt_rwl_unlock(struct rtai_rwlock *rwl);
    00065
    00066 #ifdef __cplusplus
    00067 }
    00068 #endif /* __cplusplus */
    00069
    00070 #else /* !__KERNEL__ */
    00071
    00072 #ifdef __cplusplus
    00073 extern "C" {
    00074 #endif /* __cplusplus */
    00075
    00076 RTAI_PROTO(struct rtai_rwlock *, rt_rwl_init,(unsigned long name))
    00077 {
    00078         struct { unsigned long name; } arg = { name };
    00079         return (struct rtai_rwlock *)rtai_lxrt(BIDX, SIZARG, LXRT_RWL_INIT, &arg).v[LOW];
    00080 }
    00081
    00082 RTAI_PROTO(int, rt_rwl_delete,(struct rtai_rwlock *rwl))
    00083 {
    00084         struct { struct rtai_rwlock *rwl; } arg = { rwl };
    00085         return rtai_lxrt(BIDX, SIZARG, LXRT_RWL_DELETE, &arg).i[LOW];
    00086 }
    00087
    00088 RTAI_PROTO(struct rtai_rwlock *, rt_named_rwl_init,(const char *name))
    00089 {
    00090         struct { const char *name; } arg = { name };
    00091         return (struct rtai_rwlock *)rtai_lxrt(BIDX, SIZARG, NAMED_RWL_INIT, &arg).v[LOW];
    00092 }
    00093
    00094 RTAI_PROTO(int, rt_named_rwl_delete,(struct rtai_rwlock *rwl))
    00095 {
    00096         struct { struct rtai_rwlock *rwl; } arg = { rwl };
    00097         return rtai_lxrt(BIDX, SIZARG, NAMED_RWL_DELETE, &arg).i[LOW];
    00098 }
    00099
    00100 RTAI_PROTO(int, rt_rwl_rdlock,(struct rtai_rwlock *rwl))
    00101 {
    00102         struct { struct rtai_rwlock *rwl; } arg = { rwl };
    00103         return rtai_lxrt(BIDX, SIZARG, RWL_RDLOCK, &arg).i[LOW];
    00104 }
    00105
    00106 RTAI_PROTO(int, rt_rwl_rdlock_if,(struct rtai_rwlock *rwl))
    00107 {
    00108         struct { void *rwl; } arg = { rwl };
    00109         return rtai_lxrt(BIDX, SIZARG, RWL_RDLOCK_IF, &arg).i[LOW];
    00110 }
    00111
    00112 RTAI_PROTO(int, rt_rwl_rdlock_until,(struct rtai_rwlock *rwl, RTIME time))
    00113 {
    00114         struct { struct rtai_rwlock *rwl; RTIME time; } arg = { rwl, time };
    00115         return rtai_lxrt(BIDX, SIZARG, RWL_RDLOCK_UNTIL, &arg).i[LOW];
    00116 }
    00117
    00118 RTAI_PROTO(int, rt_rwl_rdlock_timed,(struct rtai_rwlock *rwl, RTIME delay))
    00119 {
    00120         struct { struct rtai_rwlock *rwl; RTIME delay; } arg = { rwl, delay };
    00121         return rtai_lxrt(BIDX, SIZARG, RWL_RDLOCK_TIMED, &arg).i[LOW];
    00122 }
    00123
    00124 RTAI_PROTO(int, rt_rwl_wrlock,(struct rtai_rwlock *rwl))
    00125 {
    00126         struct { struct rtai_rwlock *rwl; } arg = { rwl };
    00127         return rtai_lxrt(BIDX, SIZARG, RWL_WRLOCK, &arg).i[LOW];
    00128 }
    00129
    00130 RTAI_PROTO(int, rt_rwl_wrlock_if,(struct rtai_rwlock *rwl))
    00131 {
    00132         struct { struct rtai_rwlock *rwl; } arg = { rwl };
    00133         return rtai_lxrt(BIDX, SIZARG, RWL_WRLOCK_IF, &arg).i[LOW];
    00134 }
    00135
    00136 RTAI_PROTO(int, rt_rwl_wrlock_until,(struct rtai_rwlock *rwl, RTIME time))
    00137 {
    00138         struct { struct rtai_rwlock *rwl; RTIME time; } arg = { rwl, time };
    00139         return rtai_lxrt(BIDX, SIZARG, RWL_WRLOCK_UNTIL, &arg).i[LOW];
    00140 }
    00141
    00142 RTAI_PROTO(int, rt_rwl_wrlock_timed,(struct rtai_rwlock *rwl, RTIME delay))
    00143 {
    00144         struct { struct rtai_rwlock *rwl; RTIME delay; } arg = { rwl, delay };
    00145         return rtai_lxrt(BIDX, SIZARG, RWL_WRLOCK_TIMED, &arg).i[LOW];
    00146 }
    00147
    00148 RTAI_PROTO(int, rt_rwl_unlock,(struct rtai_rwlock *rwl))
    00149 {
    00150         struct { struct rtai_rwlock *rwl; } arg = { rwl };
    00151         return rtai_lxrt(BIDX, SIZARG, RWL_UNLOCK, &arg).i[LOW];
    00152 }
    00153
    00154 #ifdef __cplusplus
    00155 }
    00156 #endif /* __cplusplus */
    00157
    00158 #endif /* __KERNEL__ */
    00159
    00160 #if !defined(__KERNEL__) || defined(__cplusplus)
    00161
    00162 typedef struct rtai_rwlock {
    00163     int opaque;
    00164 } RWL;
    00165
    00166 #endif /* !__KERNEL__ || __cplusplus */
    00167
    00168 #endif /* !_RTAI_RWL_H */