1 files changed, 100 insertions, 0 deletions
diff --git a/o3d/command_buffer/service/resource.cc b/o3d/command_buffer/service/resource.cc
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+++ b/o3d/command_buffer/service/resource.cc
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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 COPYRIGHT
+ * OWNER OR CONTRIBUTORS 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.
+ */
+
+
+// This file contains the implementation of ResourceMapBase.
+
+#include "command_buffer/service/resource.h"
+
+namespace command_buffer {
+
+// Assigns a resource to a resource ID, by setting it at the right location
+// into the list, resizing the list if necessary, and destroying an existing
+// resource if one existed already.
+void ResourceMapBase::Assign(ResourceId id, Resource *resource) {
+  if (id >= resources_.size()) {
+    resources_.resize(id + 1, NULL);
+  } else {
+    Resource *&entry = resources_[id];
+    if (entry) {
+      delete entry;
+      entry = NULL;
+    }
+  }
+  DCHECK(resources_[id] == NULL);
+  resources_[id] = resource;
+}
+
+// Destroys a resource contained in the map, setting its entry to NULL. If
+// necessary, this will trim the list.
+bool ResourceMapBase::Destroy(ResourceId id) {
+  if (id >= resources_.size()) {
+    return false;
+  }
+  Resource *&entry = resources_[id];
+  if (entry) {
+    delete entry;
+    entry = NULL;
+
+    // Removing the last element, we can trim the list.
+    // TODO: this may not be optimal to do every time. Investigate if it
+    // becomes an issue, and add a threshold before we resize.
+    if (id == resources_.size() - 1) {
+      size_t last_valid = resources_.max_size();
+      for (unsigned int i = id; i < resources_.size(); --i) {
+        if (resources_[i]) {
+          last_valid = i;
+          break;
+        }
+      }
+      if (last_valid == resources_.max_size()) {
+        resources_.clear();
+      } else {
+        resources_.resize(last_valid + 1);
+      }
+    }
+    return true;
+  }
+  return false;
+}
+
+// Goes over all non-NULL entries in the list, destroying them, then clears the
+// list.
+void ResourceMapBase::DestroyAllResources() {
+  for (Container::iterator i = resources_.begin(); i != resources_.end(); ++i) {
+    if (*i) {
+      delete *i;
+    }
+  }
+  resources_.clear();
+}
+
+}  // namespace command_buffer