include/native/sem.h

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00001 
00022 #ifndef _XENO_SEM_H
00023 #define _XENO_SEM_H
00024 
00025 #include <nucleus/synch.h>
00026 #include <native/types.h>
00027 
00028 /* Creation flags. */
00029 #define S_PRIO  XNSYNCH_PRIO    /* Pend by task priority order. */
00030 #define S_FIFO  XNSYNCH_FIFO    /* Pend by FIFO order. */
00031 #define S_PULSE 0x100           /* Apply pulse mode. */
00032 
00033 typedef struct rt_sem_info {
00034 
00035     unsigned long count; /* !< Current semaphore value. */
00036 
00037     int nwaiters;       /* !< Number of pending tasks. */
00038 
00039     char name[XNOBJECT_NAME_LEN]; /* !< Symbolic name. */
00040 
00041 } RT_SEM_INFO;
00042 
00043 typedef struct rt_sem_placeholder {
00044     xnhandle_t opaque;
00045 } RT_SEM_PLACEHOLDER;
00046 
00047 #if (defined(__KERNEL__) || defined(__XENO_SIM__)) && !defined(DOXYGEN_CPP)
00048 
00049 #include <native/ppd.h>
00050 
00051 #define XENO_SEM_MAGIC 0x55550303
00052 
00053 typedef struct rt_sem {
00054 
00055     unsigned magic;   /* !< Magic code - must be first */
00056 
00057     xnsynch_t synch_base; /* !< Base synchronization object. */
00058 
00059     unsigned long count; /* !< Current semaphore value. */
00060 
00061     int mode;           /* !< Creation mode. */
00062 
00063     xnhandle_t handle;  /* !< Handle in registry -- zero if unregistered. */
00064 
00065     char name[XNOBJECT_NAME_LEN]; /* !< Symbolic name. */
00066 
00067 #ifdef CONFIG_XENO_OPT_PERVASIVE
00068     pid_t cpid;                 /* !< Creator's pid. */
00069 #endif /* CONFIG_XENO_OPT_PERVASIVE */
00070 
00071     xnholder_t rlink;           /* !< Link in resource queue. */
00072 
00073 #define rlink2sem(ln)           container_of(ln, RT_SEM, rlink)
00074 
00075     xnqueue_t *rqueue;          /* !< Backpointer to resource queue. */
00076 
00077 } RT_SEM;
00078 
00079 #ifdef __cplusplus
00080 extern "C" {
00081 #endif
00082 
00083 #ifdef CONFIG_XENO_OPT_NATIVE_SEM
00084 
00085 int __native_sem_pkg_init(void);
00086 
00087 void __native_sem_pkg_cleanup(void);
00088 
00089 static inline void __native_sem_flush_rq(xnqueue_t *rq)
00090 {
00091         xeno_flush_rq(RT_SEM, rq, sem);
00092 }
00093 
00094 #else /* !CONFIG_XENO_OPT_NATIVE_SEM */
00095 
00096 #define __native_sem_pkg_init()         ({ 0; })
00097 #define __native_sem_pkg_cleanup()              do { } while(0)
00098 #define __native_sem_flush_rq(rq)               do { } while(0)
00099 
00100 #endif /* !CONFIG_XENO_OPT_NATIVE_SEM */
00101 
00102 #ifdef __cplusplus
00103 }
00104 #endif
00105 
00106 #else /* !(__KERNEL__ || __XENO_SIM__) */
00107 
00108 typedef RT_SEM_PLACEHOLDER RT_SEM;
00109 
00110 #ifdef __cplusplus
00111 extern "C" {
00112 #endif
00113 
00114 int rt_sem_bind(RT_SEM *sem,
00115                 const char *name,
00116                 RTIME timeout);
00117 
00118 static inline int rt_sem_unbind (RT_SEM *sem)
00119 
00120 {
00121     sem->opaque = XN_NO_HANDLE;
00122     return 0;
00123 }
00124 
00125 #ifdef __cplusplus
00126 }
00127 #endif
00128 
00129 #endif /* __KERNEL__ || __XENO_SIM__ */
00130 
00131 #ifdef __cplusplus
00132 extern "C" {
00133 #endif
00134 
00135 /* Public interface. */
00136 
00137 int rt_sem_create(RT_SEM *sem,
00138                   const char *name,
00139                   unsigned long icount,
00140                   int mode);
00141 
00142 int rt_sem_delete(RT_SEM *sem);
00143 
00144 int rt_sem_p(RT_SEM *sem,
00145              RTIME timeout);
00146 
00147 int rt_sem_v(RT_SEM *sem);
00148 
00149 int rt_sem_broadcast(RT_SEM *sem);
00150 
00151 int rt_sem_inquire(RT_SEM *sem,
00152                    RT_SEM_INFO *info);
00153 
00154 #ifdef __cplusplus
00155 }
00156 #endif
00157 
00158 #endif /* !_XENO_SEM_H */

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