rtai-core/include/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 */

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