2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include "../afs/param.h" /* Should be always first */
11 #include <afsconfig.h>
15 #include "../afs/sysincludes.h" /* Standard vendor system headers */
16 #include "../afs/afsincludes.h" /* Afs-based standard headers */
17 #include "../afs/afs_stats.h" /* afs statistics */
21 static int osi_TimedSleep(char *event, afs_int32 ams, int aintok);
22 void afs_osi_Wakeup(char *event);
23 void afs_osi_Sleep(char *event);
28 void afs_osi_InitWaitHandle(struct afs_osi_WaitHandle *achandle)
30 AFS_STATCNT(osi_InitWaitHandle);
31 achandle->proc = (caddr_t) 0;
35 void afs_osi_CancelWait(struct afs_osi_WaitHandle *achandle)
39 AFS_STATCNT(osi_CancelWait);
40 proc = achandle->proc;
41 if (proc == 0) return;
42 achandle->proc = (caddr_t) 0; /* so dude can figure out he was signalled */
43 afs_osi_Wakeup(&waitV);
47 * Waits for data on ahandle, or ams ms later. ahandle may be null.
48 * Returns 0 if timeout and EINTR if signalled.
50 int afs_osi_Wait(afs_int32 ams, struct afs_osi_WaitHandle *ahandle, int aintok)
53 afs_int32 endTime, tid;
55 AFS_STATCNT(osi_Wait);
56 endTime = osi_Time() + (ams/1000);
58 ahandle->proc = (caddr_t) curthreadp;
62 code = osi_TimedSleep(&waitV, ams, aintok);
64 if (code) break; /* if something happened, quit now */
65 /* if we we're cancelled, quit now */
66 if (ahandle && (ahandle->proc == (caddr_t) 0)) {
67 /* we've been signalled */
70 } while (osi_Time() < endTime);
77 typedef struct afs_event {
78 struct afs_event *next; /* next in hash chain */
79 char *event; /* lwp event: an address */
80 int refcount; /* Is it in use? */
81 int seq; /* Sequence number: this is incremented
82 by wakeup calls; wait will not return until
84 kcondvar_t cond; /* Currently associated condition variable */
88 afs_event_t *afs_evhasht[HASHSIZE];/* Hash table for events */
89 #if (_MIPS_SZPTR == 64)
90 #define afs_evhash(event) (afs_uint32) ((((long)event)>>3) & (HASHSIZE-1));
92 #define afs_evhash(event) (afs_uint32) ((((long)event)>>2) & (HASHSIZE-1));
94 int afs_evhashcnt = 0;
96 /* Get and initialize event structure corresponding to lwp event (i.e. address)
98 static afs_event_t *afs_getevent(char *event)
100 afs_event_t *evp, *newp = 0;
104 hashcode = afs_evhash(event);
105 evp = afs_evhasht[hashcode];
107 if (evp->event == event) {
111 if (evp->refcount == 0)
116 newp = (afs_event_t *) osi_AllocSmallSpace(sizeof (afs_event_t));
118 newp->next = afs_evhasht[hashcode];
119 afs_evhasht[hashcode] = newp;
120 cv_init(&newp->cond, "event cond var", CV_DEFAULT, NULL);
128 /* Release the specified event */
129 #define relevent(evp) ((evp)->refcount--)
132 void afs_osi_Sleep(char *event)
134 struct afs_event *evp;
137 evp = afs_getevent(event);
139 while (seq == evp->seq) {
141 cv_wait(&evp->cond, &afs_global_lock);
149 * event - event to sleep on
150 * ams --- max sleep time in milliseconds
151 * aintok - 1 if should sleep interruptibly
153 * Returns 0 if timeout and EINTR if signalled.
155 static int osi_TimedSleep(char *event, afs_int32 ams, int aintok)
158 struct afs_event *evp;
159 struct timespec ticks;
161 ticks.tv_sec = ams / 1000;
162 ticks.tv_nsec = (ams - (ticks.tv_sec * 1000) ) * 1000000;
165 evp = afs_getevent(event);
169 if (sv_timedwait_sig(&evp->cond, AFSD_PRI(), &afs_global_lock,
170 0, 0, &ticks, (struct timespec*)0))
172 AFS_MUTEX_ENTER(&afs_global_lock);
174 cv_timedwait(&evp->cond, &afs_global_lock, ticks);
182 void afs_osi_Wakeup(char *event)
184 struct afs_event *evp;
186 evp = afs_getevent(event);
187 if (evp->refcount > 1) {
189 cv_broadcast(&evp->cond);