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 <afsconfig.h>
11 #include "../afs/param.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);
26 void afs_osi_InitWaitHandle(struct afs_osi_WaitHandle *achandle)
28 AFS_STATCNT(osi_InitWaitHandle);
29 achandle->proc = (caddr_t) 0;
33 void afs_osi_CancelWait(struct afs_osi_WaitHandle *achandle)
37 AFS_STATCNT(osi_CancelWait);
38 proc = achandle->proc;
39 if (proc == 0) return;
40 achandle->proc = (caddr_t) 0; /* so dude can figure out he was signalled */
41 afs_osi_Wakeup(&waitV);
45 * Waits for data on ahandle, or ams ms later. ahandle may be null.
46 * Returns 0 if timeout and EINTR if signalled.
48 int afs_osi_Wait(afs_int32 ams, struct afs_osi_WaitHandle *ahandle, int aintok)
51 afs_int32 endTime, tid;
53 AFS_STATCNT(osi_Wait);
54 endTime = osi_Time() + (ams/1000);
56 ahandle->proc = (caddr_t) u.u_procp;
60 code = osi_TimedSleep(&waitV, ams, aintok);
62 if (code) break; /* if something happened, quit now */
63 /* if we we're cancelled, quit now */
64 if (ahandle && (ahandle->proc == (caddr_t) 0)) {
65 /* we've been signalled */
68 } while (osi_Time() < endTime);
75 typedef struct afs_event {
76 struct afs_event *next; /* next in hash chain */
77 char *event; /* lwp event: an address */
78 int refcount; /* Is it in use? */
79 int seq; /* Sequence number: this is incremented
80 by wakeup calls; wait will not return until
86 afs_event_t *afs_evhasht[HASHSIZE];/* Hash table for events */
87 #define afs_evhash(event) (afs_uint32) ((((long)event)>>2) & (HASHSIZE-1));
88 int afs_evhashcnt = 0;
90 /* Get and initialize event structure corresponding to lwp event (i.e. address)
92 static afs_event_t *afs_getevent(char *event)
94 afs_event_t *evp, *newp = 0;
98 hashcode = afs_evhash(event);
99 evp = afs_evhasht[hashcode];
101 if (evp->event == event) {
105 if (evp->refcount == 0)
110 newp = (afs_event_t *) osi_AllocSmallSpace(sizeof (afs_event_t));
112 newp->next = afs_evhasht[hashcode];
113 afs_evhasht[hashcode] = newp;
121 /* Release the specified event */
122 #define relevent(evp) ((evp)->refcount--)
125 void afs_osi_Sleep(void *event)
127 struct afs_event *evp;
130 evp = afs_getevent(event);
132 while (seq == evp->seq) {
134 assert_wait((vm_offset_t)(&evp->cond), 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;
163 ticks = ( ams * afs_hz )/1000;
166 evp = afs_getevent(event);
168 assert_wait((vm_offset_t)(&evp->cond), aintok);
170 thread_set_timeout(ticks);
173 if (current_thread()->wait_result != THREAD_AWAKENED)
181 int afs_osi_Wakeup(void *event)
184 struct afs_event *evp;
186 evp = afs_getevent(event);
187 if (evp->refcount > 1) {
189 thread_wakeup((vm_offset_t)(&evp->cond));