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 */
20 static int osi_TimedSleep(char *event, afs_int32 ams, int aintok);
25 void afs_osi_InitWaitHandle(struct afs_osi_WaitHandle *achandle)
27 AFS_STATCNT(osi_InitWaitHandle);
28 achandle->proc = (caddr_t) 0;
32 void afs_osi_CancelWait(struct afs_osi_WaitHandle *achandle)
36 AFS_STATCNT(osi_CancelWait);
37 proc = achandle->proc;
38 if (proc == 0) return;
39 achandle->proc = (caddr_t) 0; /* so dude can figure out he was signalled */
40 afs_osi_Wakeup(&waitV);
44 * Waits for data on ahandle, or ams ms later. ahandle may be null.
45 * Returns 0 if timeout and EINTR if signalled.
47 int afs_osi_Wait(afs_int32 ams, struct afs_osi_WaitHandle *ahandle, int aintok)
50 afs_int32 endTime, tid;
51 struct proc *p=current_proc();
53 AFS_STATCNT(osi_Wait);
54 endTime = osi_Time() + (ams/1000);
56 ahandle->proc = (caddr_t)p;
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);
74 typedef struct afs_event {
75 struct afs_event *next; /* next in hash chain */
76 char *event; /* lwp event: an address */
77 int refcount; /* Is it in use? */
78 int seq; /* Sequence number: this is incremented
79 by wakeup calls; wait will not return until
84 afs_event_t *afs_evhasht[HASHSIZE];/* Hash table for events */
85 #define afs_evhash(event) (afs_uint32) ((((long)event)>>2) & (HASHSIZE-1));
86 int afs_evhashcnt = 0;
88 /* Get and initialize event structure corresponding to lwp event (i.e. address)
90 static afs_event_t *afs_getevent(char *event)
92 afs_event_t *evp, *newp = 0;
96 hashcode = afs_evhash(event);
97 evp = afs_evhasht[hashcode];
99 if (evp->event == event) {
103 if (evp->refcount == 0)
108 newp = (afs_event_t *) osi_AllocSmallSpace(sizeof (afs_event_t));
110 newp->next = afs_evhasht[hashcode];
111 afs_evhasht[hashcode] = newp;
119 /* Release the specified event */
120 #define relevent(evp) ((evp)->refcount--)
123 void afs_osi_Sleep(void *event)
125 struct afs_event *evp;
128 evp = afs_getevent(event);
130 while (seq == evp->seq) {
133 #ifdef AFS_DARWIN14_ENV
134 /* this is probably safe for all versions, but testing is hard */
137 assert_wait((event_t)event, 0);
145 int afs_osi_SleepSig(void *event)
147 afs_osi_Sleep(event);
154 * event - event to sleep on
155 * ams --- max sleep time in milliseconds
156 * aintok - 1 if should sleep interruptibly
158 * Returns 0 if timeout and EINTR if signalled.
160 static int osi_TimedSleep(char *event, afs_int32 ams, int aintok)
163 struct afs_event *evp;
167 ticks = ( ams * afs_hz )/1000;
170 evp = afs_getevent(event);
173 #ifdef AFS_DARWIN14_ENV
174 /* this is probably safe for all versions, but testing is hard. */
175 /* using tsleep instead of assert_wait/thread_set_timer/thread_block
176 allows shutdown to work in 1.4 */
177 /* lack of PCATCH does *not* prevent signal delivery, neither does
178 a low priority. We would need to deal with ERESTART here if we
179 wanted to mess with p->p_sigmask, and messing with p_sigignore is
180 not the way to go.... (someone correct me if I'm wrong)
186 code=tsleep(event, prio, "afs_osi_TimedSleep", ticks);
188 assert_wait((event_t)event, aintok ? THREAD_ABORTSAFE : THREAD_UNINT);
189 thread_set_timer(ticks, NSEC_PER_SEC / hz);
202 void afs_osi_Wakeup(void *event)
204 struct afs_event *evp;
206 evp = afs_getevent(event);
207 if (evp->refcount > 1) {
209 #ifdef AFS_DARWIN14_ENV
210 /* this is probably safe for all versions, but testing is hard. */
213 thread_wakeup((event_t)event);