8 static int tr_mq_msg_destructor(void *object)
10 TR_MQ_MSG *msg=talloc_get_type_abort(object, TR_MQ_MSG);
11 if ( (msg->p!=NULL) && (msg->p_free!=NULL))
16 TR_MQ_MSG *tr_mq_msg_new(TALLOC_CTX *mem_ctx, const char *message, TR_MQ_PRIORITY prio)
18 TR_MQ_MSG *msg=talloc(mem_ctx, TR_MQ_MSG);
22 msg->message=talloc_strdup(msg, message);
23 if (msg->message==NULL) {
28 talloc_set_destructor((void *)msg, tr_mq_msg_destructor);
33 void tr_mq_msg_free(TR_MQ_MSG *msg)
39 TR_MQ_PRIORITY tr_mq_msg_get_prio(TR_MQ_MSG *msg)
44 const char *tr_mq_msg_get_message(TR_MQ_MSG *msg)
49 void *tr_mq_msg_get_payload(TR_MQ_MSG *msg)
54 /* call with a pointer to the payload and a function to free it later */
55 void tr_mq_msg_set_payload(TR_MQ_MSG *msg, void *p, void (*p_free)(void *))
62 static TR_MQ_MSG *tr_mq_msg_get_next(TR_MQ_MSG *msg)
67 static void tr_mq_msg_set_next(TR_MQ_MSG *msg, TR_MQ_MSG *next)
73 TR_MQ *tr_mq_new(TALLOC_CTX *mem_ctx)
75 TR_MQ *mq=talloc(mem_ctx, TR_MQ);
77 pthread_mutex_init(&(mq->mutex), 0);
80 mq->last_hi_prio=NULL;
85 void tr_mq_free(TR_MQ *mq)
88 tr_mq_lock(mq); /* don't pull the rug out from under someone */
93 int tr_mq_lock(TR_MQ *mq)
95 return pthread_mutex_lock(&(mq->mutex));
98 int tr_mq_unlock(TR_MQ *mq)
100 return pthread_mutex_unlock(&(mq->mutex));
103 static TR_MQ_MSG *tr_mq_get_head(TR_MQ *mq)
108 static void tr_mq_set_head(TR_MQ *mq, TR_MQ_MSG *msg)
113 static TR_MQ_MSG *tr_mq_get_tail(TR_MQ *mq)
118 static void tr_mq_set_tail(TR_MQ *mq, TR_MQ_MSG *msg)
123 void tr_mq_set_notify_cb(TR_MQ *mq, TR_MQ_NOTIFY_FN cb, void *arg)
126 mq->notify_cb_arg=arg;
129 void tr_mq_clear(TR_MQ *mq)
135 m=tr_mq_get_head(mq);
137 n=tr_mq_msg_get_next(m);
141 tr_mq_set_head(mq, NULL);
142 tr_mq_set_tail(mq, NULL);
146 static int tr_mq_empty(TR_MQ *mq)
148 return tr_mq_get_head(mq)==NULL;
151 /* puts msg in mq's talloc context */
152 static void tr_mq_append(TR_MQ *mq, TR_MQ_MSG *msg)
154 if (tr_mq_get_head(mq)==NULL) {
155 tr_mq_set_head(mq, msg);
156 tr_mq_set_tail(mq, msg);
158 tr_mq_msg_set_next(tr_mq_get_tail(mq), msg); /* add to list */
159 tr_mq_set_tail(mq, msg); /* update tail of list */
161 talloc_steal(mq, msg);
164 static void tr_mq_append_high_prio(TR_MQ *mq, TR_MQ_MSG *new)
166 if (tr_mq_get_head(mq)==NULL) {
167 tr_mq_set_head(mq, new);
168 tr_mq_set_tail(mq, new);
169 } else if (mq->last_hi_prio==NULL) {
170 tr_mq_msg_set_next(new, tr_mq_get_head(mq)); /* add to front of list */
171 tr_mq_set_head(mq, new); /* update head of list */
173 tr_mq_msg_set_next(new, tr_mq_msg_get_next(mq->last_hi_prio));
174 tr_mq_msg_set_next(mq->last_hi_prio, new); /* add to end of hi prio msgs */
176 mq->last_hi_prio=new; /* in any case, this is now the last high priority msg */
177 talloc_steal(mq,new);
180 #define DEBUG_TR_MQ 0
182 static void tr_mq_print(TR_MQ *mq)
184 TR_MQ_MSG *m=mq->head;
187 tr_debug("tr_mq_print: mq contents:");
190 tr_debug("tr_mq_print: Entry %02d: %-15s (prio %d)",
191 ii, tr_mq_msg_get_message(m), tr_mq_msg_get_prio(m));
192 m=tr_mq_msg_get_next(m);
196 void tr_mq_add(TR_MQ *mq, TR_MQ_MSG *msg)
199 TR_MQ_NOTIFY_FN notify_cb=NULL;
200 void *notify_cb_arg=NULL;
204 was_empty=tr_mq_empty(mq);
205 switch (tr_mq_msg_get_prio(msg)) {
206 case TR_MQ_PRIO_HIGH:
207 tr_mq_append_high_prio(mq, msg);
210 tr_mq_append(mq, msg);
213 /* before releasing the mutex, get notify_cb data out of mq */
214 notify_cb=mq->notify_cb;
215 notify_cb_arg=mq->notify_cb_arg;
223 /* see if we need to tell someone we became non-empty */
224 if (was_empty && (notify_cb!=NULL))
225 notify_cb(mq, notify_cb_arg);
228 /* caller must free msg via tr_mq_msg_free */
229 TR_MQ_MSG *tr_mq_pop(TR_MQ *mq)
231 TR_MQ_MSG *popped=NULL;
234 if (tr_mq_get_head(mq)!=NULL) {
235 popped=tr_mq_get_head(mq);
236 tr_mq_set_head(mq, tr_mq_msg_get_next(popped)); /* popped is the old head */
238 if (popped==mq->last_hi_prio)
239 mq->last_hi_prio=NULL;
241 if (tr_mq_get_head(mq)==NULL)
242 tr_mq_set_tail(mq, NULL); /* just popped the last element */
246 tr_mq_msg_set_next(popped, NULL); /* disconnect from list */