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"
14 #include "afs/sysincludes.h" /* Standard vendor system headers */
15 #include "afsincludes.h" /* Afs-based standard headers */
16 #include "afs/afs_stats.h" /* afs statistics */
21 AfsWaitHack(struct trb *trb)
24 /* this gets called at interrupt context; let's not tempt fate... */
25 AFS_STATCNT(WaitHack);
28 e_clear_wait(trb->func_data, THREAD_TIMED_OUT);
32 afs_osi_InitWaitHandle(struct afs_osi_WaitHandle *achandle)
34 AFS_STATCNT(osi_InitWaitHandle);
35 achandle->proc = (caddr_t) 0;
40 afs_osi_CancelWait(struct afs_osi_WaitHandle *achandle)
44 AFS_STATCNT(osi_CancelWait);
45 proc = achandle->proc;
48 achandle->proc = (caddr_t) 0; /* so dude can figure out he was signalled */
49 afs_osi_Wakeup(&waitV);
53 * Waits for data on ahandle, or ams ms later. ahandle may be null.
54 * Returns 0 if timeout and EINTR if signalled.
57 afs_osi_Wait(afs_int32 ams, struct afs_osi_WaitHandle *ahandle, int aintok)
60 afs_int32 endTime, tid;
62 AFS_STATCNT(osi_Wait);
63 endTime = osi_Time() + (ams / 1000);
65 ahandle->proc = (caddr_t) thread_self();
69 code = afs_osi_TimedSleep(&waitV, ams, aintok);
72 break; /* if something happened, quit now */
73 /* if we we're cancelled, quit now */
74 if (ahandle && (ahandle->proc == (caddr_t) 0)) {
75 /* we've been signalled */
78 } while (osi_Time() < endTime);
85 afs_event_t *afs_evhasht[AFS_EVHASHSIZE]; /* Hash table for events */
86 #define afs_evhash(event) (afs_uint32) ((((long)event)>>2) & (AFS_EVHASHSIZE-1))
87 int afs_evhashcnt = 0;
89 /* Get and initialize event structure corresponding to lwp event (i.e. address)
92 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 *) xmalloc(sizeof(afs_event_t), 5, pinned_heap);
112 newp->next = afs_evhasht[hashcode];
113 afs_evhasht[hashcode] = newp;
114 newp->cond = EVENT_NULL;
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 e_assert_wait(&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;
165 struct timestruc_t ticks;
169 ticks.tv_sec = ams / 1000;
170 ticks.tv_nsec = (ams - (ticks.tv_sec * 1000)) * 1000000;
173 evp = afs_getevent(event);
177 osi_Panic("talloc returned NULL");
179 trb->func = AfsWaitHack;
180 trb->eventlist = EVENT_NULL;
181 trb->ipri = INTTIMER;
182 trb->func_data = thread_self();
183 trb->timeout.it_value = ticks;
185 e_assert_wait(&evp->cond, aintok);
188 rc = e_block_thread();
190 if (rc == THREAD_INTERRUPTED)
201 afs_osi_Wakeup(void *event)
204 struct afs_event *evp;
206 evp = afs_getevent(event);
207 if (evp->refcount > 1) {
209 e_wakeup(&evp->cond);