7 static int tr_mq_msg_destructor(void *object)
9 TR_MQ_MSG *msg=talloc_get_type_abort(object, TR_MQ_MSG);
10 if ( (msg->p!=NULL) && (msg->p_free!=NULL))
15 TR_MQ_MSG *tr_mq_msg_new(TALLOC_CTX *mem_ctx)
17 TR_MQ_MSG *msg=talloc(mem_ctx, TR_MQ_MSG);
21 talloc_set_destructor((void *)msg, tr_mq_msg_destructor);
26 void tr_mq_msg_free(TR_MQ_MSG *msg)
32 void *tr_mq_msg_get_payload(TR_MQ_MSG *msg)
37 /* call with a pointer to the payload and a function to free it later */
38 void tr_mq_msg_set_payload(TR_MQ_MSG *msg, void *p, void (*p_free)(void *))
45 static TR_MQ_MSG *tr_mq_msg_get_next(TR_MQ_MSG *msg)
50 static void tr_mq_msg_set_next(TR_MQ_MSG *msg, TR_MQ_MSG *next)
55 static TR_MQ_MSG *tr_mq_msg_get_tail(TR_MQ_MSG *msg)
58 msg=tr_mq_msg_get_next(msg);
62 static void tr_mq_msg_append(TR_MQ_MSG *msg, TR_MQ_MSG *new)
64 tr_mq_msg_set_next(tr_mq_msg_get_tail(msg), new);
68 TR_MQ *tr_mq_new(TALLOC_CTX *mem_ctx)
70 TR_MQ *mq=talloc(mem_ctx, TR_MQ);
72 pthread_mutex_init(&(mq->mutex), 0);
79 void tr_mq_free(TR_MQ *mq)
82 tr_mq_lock(mq); /* don't pull the rug out from under someone */
87 int tr_mq_lock(TR_MQ *mq)
89 return pthread_mutex_lock(&(mq->mutex));
92 int tr_mq_unlock(TR_MQ *mq)
94 return pthread_mutex_lock(&(mq->mutex));
97 static TR_MQ_MST *tr_mq_get_head(TR_MQ *mq)
102 static void tr_mq_set_head(TR_MQ *mq, TR_MQ_MSG *msg)
107 static TR_MQ_MST *tr_mq_get_tail(TR_MQ *mq)
112 static void tr_mq_set_tail(TR_MQ *mq, TR_MQ_MSG *msg)
117 /* puts msg in mq's talloc context */
118 void tr_mq_append(TR_MQ *mq, TR_MQ_MSG *msg)
121 TR_MQ_NOTIFY_FN notify_cb=NULL;
122 void *notify_cb_arg=NULL;
125 if (tr_mq_get_head(mq)==NULL) {
127 tr_mq_set_head(mq, msg);
128 tr_mq_set_tail(mq, msg);
130 tr_mq_msg_set_next(tr_mq_get_tail(), msg); /* add to list */
131 tr_mq_set_tail(mq, msg); /* update tail of list */
133 talloc_steal(mq, msg);
134 /* before releasing the mutex, get notify_cb data out of mq */
135 notify_cb=mq->notify_cb;
136 notify_cb_arg=mq->notify_cb_arg;
139 /* see if we need to tell someone we became non-empty */
140 if (was_empty && (notify_cb!=NULL))
141 mq->notify_cb(mq, notify_cb_arg);
144 /* caller must free msg via tr_mq_msg_free */
145 TR_MQ_MSG *tr_mq_pop(TR_MQ *mq)
147 TR_MQ_MSG *popped=NULL;
150 if (tr_mq_get_head(mq)!=NULL) {
151 popped=tr_mq_get_head(mq);
152 tr_mq_msg_set_next(popped, tr_mq_msg_get_next(popped)); /* popped is the old head */
153 if (tr_mq_get_head(mq)==NULL)
154 tr_mq_set_tail(mq, NULL); /* just popped the last element */
158 tr_mq_msg_set_next(popped, NULL); /* disconnect from list */