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
11 #include <afsconfig.h>
12 #include "../afs/param.h"
16 #include "../afs/sysincludes.h" /* Standard vendor system headers */
17 #include "../afs/afsincludes.h" /* Afs-based standard headers */
18 #include "../afs/afs_stats.h" /* afs statistics */
22 static int osi_TimedSleep(char *event, afs_int32 ams, int aintok);
27 void afs_osi_InitWaitHandle(struct afs_osi_WaitHandle *achandle)
29 AFS_STATCNT(osi_InitWaitHandle);
30 achandle->proc = (caddr_t) 0;
34 void afs_osi_CancelWait(struct afs_osi_WaitHandle *achandle)
38 AFS_STATCNT(osi_CancelWait);
39 proc = achandle->proc;
40 if (proc == 0) return;
41 achandle->proc = (caddr_t) 0; /* so dude can figure out he was signalled */
42 afs_osi_Wakeup(&waitV);
46 * Waits for data on ahandle, or ams ms later. ahandle may be null.
47 * Returns 0 if timeout and EINTR if signalled.
49 int afs_osi_Wait(afs_int32 ams, struct afs_osi_WaitHandle *ahandle, int aintok)
52 afs_int32 endTime, tid;
54 AFS_STATCNT(osi_Wait);
55 endTime = osi_Time() + (ams/1000);
57 ahandle->proc = (caddr_t) curproc;
61 code = osi_TimedSleep(&waitV, ams, aintok);
63 if (code) break; /* if something happened, quit now */
64 /* if we we're cancelled, quit now */
65 if (ahandle && (ahandle->proc == (caddr_t) 0)) {
66 /* we've been signalled */
69 } while (osi_Time() < endTime);
76 typedef struct afs_event {
77 struct afs_event *next; /* next in hash chain */
78 char *event; /* lwp event: an address */
79 int refcount; /* Is it in use? */
80 int seq; /* Sequence number: this is incremented
81 by wakeup calls; wait will not return until
87 afs_event_t *afs_evhasht[HASHSIZE];/* Hash table for events */
88 #define afs_evhash(event) (afs_uint32) ((((long)event)>>2) & (HASHSIZE-1));
89 int afs_evhashcnt = 0;
91 /* Get and initialize event structure corresponding to lwp event (i.e. address)
93 static afs_event_t *afs_getevent(char *event)
95 afs_event_t *evp, *newp = 0;
99 hashcode = afs_evhash(event);
100 evp = afs_evhasht[hashcode];
102 if (evp->event == event) {
106 if (evp->refcount == 0)
111 newp = (afs_event_t *) osi_AllocSmallSpace(sizeof (afs_event_t));
113 newp->next = afs_evhasht[hashcode];
114 afs_evhasht[hashcode] = newp;
122 /* Release the specified event */
123 #define relevent(evp) ((evp)->refcount--)
126 void afs_osi_Sleep(void *event)
128 struct afs_event *evp;
131 evp = afs_getevent(event);
133 while (seq == evp->seq) {
136 tsleep(event, PVFS, "afs_osi_Sleep", 0);
142 int afs_osi_SleepSig(void *event)
144 afs_osi_Sleep(event);
151 * event - event to sleep on
152 * ams --- max sleep time in milliseconds
153 * aintok - 1 if should sleep interruptibly
155 * Returns 0 if timeout and EINTR if signalled.
157 static int osi_TimedSleep(char *event, afs_int32 ams, int aintok)
160 struct afs_event *evp;
164 ticks = ( ams * afs_hz )/1000;
167 evp = afs_getevent(event);
174 code=tsleep(event, prio, "afs_osi_TimedSleep", ticks);
183 void afs_osi_Wakeup(void *event)
185 struct afs_event *evp;
187 evp = afs_getevent(event);
188 if (evp->refcount > 1) {