--- libaitsched/src/tasks.c	2012/05/31 14:17:59	1.8.2.1
+++ libaitsched/src/tasks.c	2012/07/24 13:47:02	1.9.6.1
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: tasks.c,v 1.8.2.1 2012/05/31 14:17:59 misho Exp $
+* $Id: tasks.c,v 1.9.6.1 2012/07/24 13:47:02 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -74,6 +74,8 @@ _sched_useTask(sched_root_task_t * __restrict root)
 		}
 	}
 
+	memset(task, 0, sizeof(sched_task_t));
+	task->task_id = (uintptr_t) task;
 	return task;
 }
 
@@ -85,7 +87,7 @@ _sched_unuseTask(sched_task_t * __restrict task)
 #ifdef HAVE_LIBPTHREAD
 	pthread_mutex_lock(&TASK_ROOT(task)->root_mtx[taskUNUSE]);
 #endif
-	TAILQ_INSERT_TAIL(&TASK_ROOT(task)->root_unuse, task, task_node);
+	TAILQ_INSERT_TAIL(&TASK_ROOT(task)->root_unuse, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 	pthread_mutex_unlock(&TASK_ROOT(task)->root_mtx[taskUNUSE]);
 #endif
@@ -122,9 +124,6 @@ schedRead(sched_root_task_t * __restrict root, sched_t
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskREAD;
 	TASK_ROOT(task) = root;
@@ -144,7 +143,7 @@ schedRead(sched_root_task_t * __restrict root, sched_t
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskREAD]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_read, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_read, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskREAD]);
 #endif
@@ -179,9 +178,6 @@ schedWrite(sched_root_task_t * __restrict root, sched_
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskWRITE;
 	TASK_ROOT(task) = root;
@@ -201,7 +197,7 @@ schedWrite(sched_root_task_t * __restrict root, sched_
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskWRITE]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_write, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_write, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskWRITE]);
 #endif
@@ -236,9 +232,6 @@ schedNode(sched_root_task_t * __restrict root, sched_t
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskNODE;
 	TASK_ROOT(task) = root;
@@ -258,7 +251,7 @@ schedNode(sched_root_task_t * __restrict root, sched_t
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskNODE]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_node, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_node, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskNODE]);
 #endif
@@ -293,9 +286,6 @@ schedProc(sched_root_task_t * __restrict root, sched_t
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskPROC;
 	TASK_ROOT(task) = root;
@@ -315,7 +305,7 @@ schedProc(sched_root_task_t * __restrict root, sched_t
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskPROC]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_proc, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_proc, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskPROC]);
 #endif
@@ -333,13 +323,17 @@ schedProc(sched_root_task_t * __restrict root, sched_t
  * @arg = 1st func argument
  * @id = Trigger ID
  * @opt_data = Optional data
- * @opt_dlen = Optional data length
+ * @opt_dlen = Optional user's trigger flags
  * return: NULL error or !=NULL new queued task
  */
 sched_task_t *
 schedUser(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long id, 
 		void *opt_data, size_t opt_dlen)
 {
+#ifndef EVFILT_USER
+	sched_SetErr(ENOTSUP, "Not supported kevent() filter");
+	return NULL;
+#else
 	sched_task_t *task;
 	void *ptr;
 
@@ -350,9 +344,6 @@ schedUser(sched_root_task_t * __restrict root, sched_t
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskUSER;
 	TASK_ROOT(task) = root;
@@ -372,7 +363,7 @@ schedUser(sched_root_task_t * __restrict root, sched_t
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskUSER]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_user, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_user, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskUSER]);
 #endif
@@ -380,6 +371,7 @@ schedUser(sched_root_task_t * __restrict root, sched_t
 		task = _sched_unuseTask(task);
 
 	return task;
+#endif
 }
 
 /*
@@ -407,9 +399,6 @@ schedSignal(sched_root_task_t * __restrict root, sched
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskSIGNAL;
 	TASK_ROOT(task) = root;
@@ -429,7 +418,7 @@ schedSignal(sched_root_task_t * __restrict root, sched
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskSIGNAL]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_signal, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_signal, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskSIGNAL]);
 #endif
@@ -464,9 +453,6 @@ schedAlarm(sched_root_task_t * __restrict root, sched_
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskALARM;
 	TASK_ROOT(task) = root;
@@ -486,7 +472,7 @@ schedAlarm(sched_root_task_t * __restrict root, sched_
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskALARM]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_alarm, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_alarm, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskALARM]);
 #endif
@@ -511,7 +497,7 @@ sched_task_t *
 schedTimer(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, struct timespec ts, 
 		void *opt_data, size_t opt_dlen)
 {
-	sched_task_t *task, *t = NULL;
+	sched_task_t *task, *tmp, *t = NULL;
 	void *ptr;
 	struct timespec now;
 
@@ -522,9 +508,6 @@ schedTimer(sched_root_task_t * __restrict root, sched_
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskTIMER;
 	TASK_ROOT(task) = root;
@@ -557,15 +540,15 @@ schedTimer(sched_root_task_t * __restrict root, sched_
 		pthread_mutex_lock(&root->root_mtx[taskTIMER]);
 #endif
 #ifdef TIMER_WITHOUT_SORT
-		TAILQ_INSERT_TAIL(&root->root_timer, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_timer, TASK_ID(task), task_node);
 #else
-		TAILQ_FOREACH(t, &root->root_timer, task_node)
+		TAILQ_FOREACH_SAFE(t, &root->root_timer, task_node, tmp)
 			if (sched_timespeccmp(&TASK_TS(task), &TASK_TS(t), -) < 1)
 				break;
 		if (!t)
-			TAILQ_INSERT_TAIL(&root->root_timer, task, task_node);
+			TAILQ_INSERT_TAIL(&root->root_timer, TASK_ID(task), task_node);
 		else
-			TAILQ_INSERT_BEFORE(t, task, task_node);
+			TAILQ_INSERT_BEFORE(t, TASK_ID(task), task_node);
 #endif
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskTIMER]);
@@ -601,9 +584,6 @@ schedEvent(sched_root_task_t * __restrict root, sched_
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskEVENT;
 	TASK_ROOT(task) = root;
@@ -623,7 +603,7 @@ schedEvent(sched_root_task_t * __restrict root, sched_
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskEVENT]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_event, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_event, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskEVENT]);
 #endif
@@ -659,9 +639,6 @@ schedEventLo(sched_root_task_t * __restrict root, sche
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskEVENT;
 	TASK_ROOT(task) = root;
@@ -681,7 +658,7 @@ schedEventLo(sched_root_task_t * __restrict root, sche
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_lock(&root->root_mtx[taskEVENTLO]);
 #endif
-		TAILQ_INSERT_TAIL(&root->root_eventlo, task, task_node);
+		TAILQ_INSERT_TAIL(&root->root_eventlo, TASK_ID(task), task_node);
 #ifdef HAVE_LIBPTHREAD
 		pthread_mutex_unlock(&root->root_mtx[taskEVENTLO]);
 #endif
@@ -692,6 +669,60 @@ schedEventLo(sched_root_task_t * __restrict root, sche
 }
 
 /*
+ * schedSuspend() - Add Suspended task to scheduler queue
+ *
+ * @root = root task
+ * @func = task execution function
+ * @arg = 1st func argument
+ * @id = Trigger ID
+ * @opt_data = Optional data
+ * @opt_dlen = Optional data length
+ * return: NULL error or !=NULL new queued task
+ */
+sched_task_t *
+schedSuspend(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long id, 
+		void *opt_data, size_t opt_dlen)
+{
+	sched_task_t *task;
+	void *ptr;
+
+	if (!root || !func)
+		return NULL;
+
+	/* get new task */
+	if (!(task = _sched_useTask(root)))
+		return NULL;
+
+	task->task_func = func;
+	TASK_TYPE(task) = taskSUSPEND;
+	TASK_ROOT(task) = root;
+
+	TASK_ARG(task) = arg;
+	TASK_VAL(task) = id;
+
+	TASK_DATA(task) = opt_data;
+	TASK_DATLEN(task) = opt_dlen;
+
+	if (root->root_hooks.hook_add.suspend)
+		ptr = root->root_hooks.hook_add.suspend(task, NULL);
+	else
+		ptr = NULL;
+
+	if (!ptr) {
+#ifdef HAVE_LIBPTHREAD
+		pthread_mutex_lock(&root->root_mtx[taskSUSPEND]);
+#endif
+		TAILQ_INSERT_TAIL(&root->root_suspend, TASK_ID(task), task_node);
+#ifdef HAVE_LIBPTHREAD
+		pthread_mutex_unlock(&root->root_mtx[taskSUSPEND]);
+#endif
+	} else
+		task = _sched_unuseTask(task);
+
+	return task;
+}
+
+/*
  * schedCallOnce() - Call once from scheduler
  *
  * @root = root task
@@ -716,9 +747,6 @@ schedCallOnce(sched_root_task_t * __restrict root, sch
 	if (!(task = _sched_useTask(root)))
 		return NULL;
 
-	memset(task, 0, sizeof(sched_task_t));
-	task->task_id = 0;
-	task->task_lock = 0;
 	task->task_func = func;
 	TASK_TYPE(task) = taskEVENT;
 	TASK_ROOT(task) = root;