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+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "taskrunner.h"
+#include "task.h"
+#include <algorithm>
+
+
+namespace buzz {
+
+TaskRunner::~TaskRunner() {
+ // this kills and deletes children silently!
+ AbortAllChildren();
+ RunTasks();
+}
+
+void
+TaskRunner::StartTask(Task * task) {
+ tasks_.push_back(task);
+ WakeTasks();
+}
+
+void
+TaskRunner::RunTasks() {
+ // Running continues until all tasks are Blocked (ok for a small # of tasks)
+ if (tasks_running_) {
+ return; // don't reenter
+ }
+
+ tasks_running_ = true;
+
+ int did_run = true;
+ while (did_run) {
+ did_run = false;
+ // use indexing instead of iterators because tasks_ may grow
+ for (size_t i = 0; i < tasks_.size(); ++i) {
+ while (!tasks_[i]->Blocked()) {
+ tasks_[i]->Step();
+ did_run = true;
+ }
+ }
+ }
+ // Tasks are deleted when running has paused
+ for (size_t i = 0; i < tasks_.size(); ++i) {
+ if (tasks_[i]->IsDone()) {
+ Task* task = tasks_[i];
+ delete task;
+ tasks_[i] = NULL;
+ }
+ }
+ // Finally, remove nulls
+ tasks_.erase(std::remove(tasks_.begin(), tasks_.end(), (Task *)NULL), tasks_.end());
+
+ tasks_running_ = false;
+}
+
+void
+TaskRunner::PollTasks() {
+ // every task gets hit once with a poll - they wake if needed
+ for (size_t i = 0; i < tasks_.size(); ++i) {
+ if (!tasks_[i]->IsDone()) {
+ tasks_[i]->Poll();
+ }
+ }
+}
+
+
+}