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"
15 #include "afs/sysincludes.h" /* Standard vendor system headers */
16 #include "afsincludes.h" /* Afs-based standard headers */
17 #include "afs/afs_stats.h" /* afs statistics */
22 afs_osi_InitWaitHandle(struct afs_osi_WaitHandle *achandle)
24 AFS_STATCNT(osi_InitWaitHandle);
25 achandle->proc = (caddr_t) 0;
30 afs_osi_CancelWait(struct afs_osi_WaitHandle *achandle)
34 AFS_STATCNT(osi_CancelWait);
35 proc = achandle->proc;
38 achandle->proc = (caddr_t) 0; /* so dude can figure out he was signalled */
39 afs_osi_Wakeup(&waitV);
43 * Waits for data on ahandle, or ams ms later. ahandle may be null.
44 * Returns 0 if timeout and EINTR if signalled.
47 afs_osi_Wait(afs_int32 ams, struct afs_osi_WaitHandle *ahandle, int aintok)
50 afs_int32 endTime, tid;
52 AFS_STATCNT(osi_Wait);
53 endTime = osi_Time() + (ams / 1000);
55 ahandle->proc = (caddr_t) curproc;
59 code = afs_osi_TimedSleep(&waitV, ams, aintok);
62 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)
93 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--)
127 afs_osi_Sleep(void *event)
129 struct afs_event *evp;
132 evp = afs_getevent(event);
134 while (seq == evp->seq) {
136 assert_wait((vm_offset_t) (&evp->cond), 0);
145 afs_osi_SleepSig(void *event)
147 afs_osi_Sleep(event);
151 /* afs_osi_TimedSleep
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.
161 afs_osi_TimedSleep(void *event, afs_int32 ams, int aintok)
164 struct afs_event *evp;
167 ticks = (ams * afs_hz) / 1000;
170 evp = afs_getevent(event);
172 assert_wait((vm_offset_t) (&evp->cond), aintok);
174 thread_set_timeout(ticks);
177 /* if (current_thread()->wait_result != THREAD_AWAKENED)
186 afs_osi_Wakeup(void *event)
189 struct afs_event *evp;
191 evp = afs_getevent(event);
192 if (evp->refcount > 1) {
194 thread_wakeup((vm_offset_t) (&evp->cond));