Updated to mesalib 7.9

1 files changed, 505 insertions, 0 deletions

diff --git a/mesalib/src/glsl/list.h b/mesalib/src/glsl/list.h
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+/*
+ * Copyright © 2008, 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file list.h
+ * \brief Doubly-linked list abstract container type.
+ *
+ * Each doubly-linked list has a sentinel head and tail node.  These nodes
+ * contain no data.  The head sentinel can be identified by its \c prev
+ * pointer being \c NULL.  The tail sentinel can be identified by its
+ * \c next pointer being \c NULL.
+ *
+ * A list is empty if either the head sentinel's \c next pointer points to the
+ * tail sentinel or the tail sentinel's \c prev poiner points to the head
+ * sentinel.
+ *
+ * Instead of tracking two separate \c node structures and a \c list structure
+ * that points to them, the sentinel nodes are in a single structure.  Noting
+ * that each sentinel node always has one \c NULL pointer, the \c NULL
+ * pointers occupy the same memory location.  In the \c list structure
+ * contains a the following:
+ *
+ *   - A \c head pointer that represents the \c next pointer of the
+ *     head sentinel node.
+ *   - A \c tail pointer that represents the \c prev pointer of the head
+ *     sentinel node and the \c next pointer of the tail sentinel node.  This
+ *     pointer is \b always \c NULL.
+ *   - A \c tail_prev pointer that represents the \c prev pointer of the
+ *     tail sentinel node.
+ *
+ * Therefore, if \c head->next is \c NULL or \c tail_prev->prev is \c NULL,
+ * the list is empty.
+ *
+ * To anyone familiar with "exec lists" on the Amiga, this structure should
+ * be immediately recognizable.  See the following link for the original Amiga
+ * operating system documentation on the subject.
+ *
+ * http://www.natami.net/dev/Libraries_Manual_guide/node02D7.html
+ *
+ * \author Ian Romanick <ian.d.romanick@intel.com>
+ */
+
+#pragma once
+#ifndef LIST_CONTAINER_H
+#define LIST_CONTAINER_H
+
+#ifndef __cplusplus
+#include <stddef.h>
+#include <talloc.h>
+#else
+extern "C" {
+#include <talloc.h>
+}
+#endif
+
+#include <assert.h>
+
+struct exec_node {
+   struct exec_node *next;
+   struct exec_node *prev;
+
+#ifdef __cplusplus
+   /* Callers of this talloc-based new need not call delete. It's
+    * easier to just talloc_free 'ctx' (or any of its ancestors). */
+   static void* operator new(size_t size, void *ctx)
+   {
+      void *node;
+
+      node = talloc_size(ctx, size);
+      assert(node != NULL);
+
+      return node;
+   }
+
+   /* If the user *does* call delete, that's OK, we will just
+    * talloc_free in that case. */
+   static void operator delete(void *node)
+   {
+      talloc_free(node);
+   }
+
+   exec_node() : next(NULL), prev(NULL)
+   {
+      /* empty */
+   }
+
+   const exec_node *get_next() const
+   {
+      return next;
+   }
+
+   exec_node *get_next()
+   {
+      return next;
+   }
+
+   const exec_node *get_prev() const
+   {
+      return prev;
+   }
+
+   exec_node *get_prev()
+   {
+      return prev;
+   }
+
+   void remove()
+   {
+      next->prev = prev;
+      prev->next = next;
+      next = NULL;
+      prev = NULL;
+   }
+
+   /**
+    * Link a node with itself
+    *
+    * This creates a sort of degenerate list that is occasionally useful.
+    */
+   void self_link()
+   {
+      next = this;
+      prev = this;
+   }
+
+   /**
+    * Insert a node in the list after the current node
+    */
+   void insert_after(exec_node *after)
+   {
+      after->next = this->next;
+      after->prev = this;
+
+      this->next->prev = after;
+      this->next = after;
+   }
+   /**
+    * Insert a node in the list before the current node
+    */
+   void insert_before(exec_node *before)
+   {
+      before->next = this;
+      before->prev = this->prev;
+
+      this->prev->next = before;
+      this->prev = before;
+   }
+
+   /**
+    * Insert another list in the list before the current node
+    */
+   void insert_before(struct exec_list *before);
+
+   /**
+    * Replace the current node with the given node.
+    */
+   void replace_with(exec_node *replacement)
+   {
+      replacement->prev = this->prev;
+      replacement->next = this->next;
+
+      this->prev->next = replacement;
+      this->next->prev = replacement;
+   }
+
+   /**
+    * Is this the sentinel at the tail of the list?
+    */
+   bool is_tail_sentinel() const
+   {
+      return this->next == NULL;
+   }
+
+   /**
+    * Is this the sentinel at the head of the list?
+    */
+   bool is_head_sentinel() const
+   {
+      return this->prev == NULL;
+   }
+#endif
+};
+
+
+#ifdef __cplusplus
+/* This macro will not work correctly if `t' uses virtual inheritance.  If you
+ * are using virtual inheritance, you deserve a slow and painful death.  Enjoy!
+ */
+#define exec_list_offsetof(t, f, p) \
+   (((char *) &((t *) p)->f) - ((char *) p))
+#else
+#define exec_list_offsetof(t, f, p) offsetof(t, f)
+#endif
+
+/**
+ * Get a pointer to the structure containing an exec_node
+ *
+ * Given a pointer to an \c exec_node embedded in a structure, get a pointer to
+ * the containing structure.
+ *
+ * \param type  Base type of the structure containing the node
+ * \param node  Pointer to the \c exec_node
+ * \param field Name of the field in \c type that is the embedded \c exec_node
+ */
+#define exec_node_data(type, node, field) \
+   ((type *) (((char *) node) - exec_list_offsetof(type, field, node)))
+
+#ifdef __cplusplus
+struct exec_node;
+
+class iterator {
+public:
+   void next()
+   {
+   }
+
+   void *get()
+   {
+      return NULL;
+   }
+
+   bool has_next() const
+   {
+      return false;
+   }
+};
+
+class exec_list_iterator : public iterator {
+public:
+   exec_list_iterator(exec_node *n) : node(n), _next(n->next)
+   {
+      /* empty */
+   }
+
+   void next()
+   {
+      node = _next;
+      _next = node->next;
+   }
+
+   void remove()
+   {
+      node->remove();
+   }
+
+   exec_node *get()
+   {
+      return node;
+   }
+
+   bool has_next() const
+   {
+      return _next != NULL;
+   }
+
+private:
+   exec_node *node;
+   exec_node *_next;
+};
+
+#define foreach_iter(iter_type, iter, container) \
+   for (iter_type iter = (container) . iterator(); iter.has_next(); iter.next())
+#endif
+
+
+struct exec_list {
+   struct exec_node *head;
+   struct exec_node *tail;
+   struct exec_node *tail_pred;
+
+#ifdef __cplusplus
+   /* Callers of this talloc-based new need not call delete. It's
+    * easier to just talloc_free 'ctx' (or any of its ancestors). */
+   static void* operator new(size_t size, void *ctx)
+   {
+      void *node;
+
+      node = talloc_size(ctx, size);
+      assert(node != NULL);
+
+      return node;
+   }
+
+   /* If the user *does* call delete, that's OK, we will just
+    * talloc_free in that case. */
+   static void operator delete(void *node)
+   {
+      talloc_free(node);
+   }
+
+   exec_list()
+   {
+      make_empty();
+   }
+
+   void make_empty()
+   {
+      head = (exec_node *) & tail;
+      tail = NULL;
+      tail_pred = (exec_node *) & head;
+   }
+
+   bool is_empty() const
+   {
+      /* There are three ways to test whether a list is empty or not.
+       *
+       * - Check to see if the \c head points to the \c tail.
+       * - Check to see if the \c tail_pred points to the \c head.
+       * - Check to see if the \c head is the sentinel node by test whether its
+       *   \c next pointer is \c NULL.
+       *
+       * The first two methods tend to generate better code on modern systems
+       * because they save a pointer dereference.
+       */
+      return head == (exec_node *) &tail;
+   }
+
+   const exec_node *get_head() const
+   {
+      return !is_empty() ? head : NULL;
+   }
+
+   exec_node *get_head()
+   {
+      return !is_empty() ? head : NULL;
+   }
+
+   const exec_node *get_tail() const
+   {
+      return !is_empty() ? tail_pred : NULL;
+   }
+
+   exec_node *get_tail()
+   {
+      return !is_empty() ? tail_pred : NULL;
+   }
+
+   void push_head(exec_node *n)
+   {
+      n->next = head;
+      n->prev = (exec_node *) &head;
+
+      n->next->prev = n;
+      head = n;
+   }
+
+   void push_tail(exec_node *n)
+   {
+      n->next = (exec_node *) &tail;
+      n->prev = tail_pred;
+
+      n->prev->next = n;
+      tail_pred = n;
+   }
+
+   void push_degenerate_list_at_head(exec_node *n)
+   {
+      assert(n->prev->next == n);
+
+      n->prev->next = head;
+      head->prev = n->prev;
+      n->prev = (exec_node *) &head;
+      head = n;
+   }
+
+   /**
+    * Remove the first node from a list and return it
+    *
+    * \return
+    * The first node in the list or \c NULL if the list is empty.
+    *
+    * \sa exec_list::get_head
+    */
+   exec_node *pop_head()
+   {
+      exec_node *const n = this->get_head();
+      if (n != NULL)
+	 n->remove();
+
+      return n;
+   }
+
+   /**
+    * Move all of the nodes from this list to the target list
+    */
+   void move_nodes_to(exec_list *target)
+   {
+      if (is_empty()) {
+	 target->make_empty();
+      } else {
+	 target->head = head;
+	 target->tail = NULL;
+	 target->tail_pred = tail_pred;
+
+	 target->head->prev = (exec_node *) &target->head;
+	 target->tail_pred->next = (exec_node *) &target->tail;
+
+	 make_empty();
+      }
+   }
+
+   /**
+    * Append all nodes from the source list to the target list
+    */
+   void
+   append_list(exec_list *source)
+   {
+      if (source->is_empty())
+	 return;
+
+      /* Link the first node of the source with the last node of the target list.
+       */
+      this->tail_pred->next = source->head;
+      source->head->prev = this->tail_pred;
+
+      /* Make the tail of the source list be the tail of the target list.
+       */
+      this->tail_pred = source->tail_pred;
+      this->tail_pred->next = (exec_node *) &this->tail;
+
+      /* Make the source list empty for good measure.
+       */
+      source->make_empty();
+   }
+
+   exec_list_iterator iterator()
+   {
+      return exec_list_iterator(head);
+   }
+
+   exec_list_iterator iterator() const
+   {
+      return exec_list_iterator((exec_node *) head);
+   }
+#endif
+};
+
+
+#ifdef __cplusplus
+inline void exec_node::insert_before(exec_list *before)
+{
+   if (before->is_empty())
+      return;
+
+   before->tail_pred->next = this;
+   before->head->prev = this->prev;
+
+   this->prev->next = before->head;
+   this->prev = before->tail_pred;
+
+   before->make_empty();
+}
+#endif
+
+/**
+ * This version is safe even if the current node is removed.
+ */ 
+#define foreach_list_safe(__node, __list)			     \
+   for (exec_node * __node = (__list)->head, * __next = __node->next \
+	; __next != NULL					     \
+	; __node = __next, __next = __next->next)
+
+#define foreach_list(__node, __list)			\
+   for (exec_node * __node = (__list)->head		\
+	; (__node)->next != NULL 			\
+	; (__node) = (__node)->next)
+
+#define foreach_list_const(__node, __list)		\
+   for (const exec_node * __node = (__list)->head	\
+	; (__node)->next != NULL 			\
+	; (__node) = (__node)->next)
+
+#define foreach_list_typed(__type, __node, __field, __list)		\
+   for (__type * __node =						\
+	   exec_node_data(__type, (__list)->head, __field);		\
+	(__node)->__field.next != NULL; 				\
+	(__node) = exec_node_data(__type, (__node)->__field.next, __field))
+
+#define foreach_list_typed_const(__type, __node, __field, __list)	\
+   for (const __type * __node =						\
+	   exec_node_data(__type, (__list)->head, __field);		\
+	(__node)->__field.next != NULL; 				\
+	(__node) = exec_node_data(__type, (__node)->__field.next, __field))
+
+#endif /* LIST_CONTAINER_H */