draw: don't crash if GS doesn't emit anything

[mesa.git] / src / gallium / auxiliary / cso_cache / cso_hash.h

diff --git a/src/gallium/auxiliary/cso_cache/cso_hash.h b/src/gallium/auxiliary/cso_cache/cso_hash.h
index a3a65b68c843bbb2103923f579086cffbd87cf74..5891c325fa567ee027540611e7561326bef58ca3 100644 (file)
--- a/src/gallium/auxiliary/cso_cache/cso_hash.h
+++ b/src/gallium/auxiliary/cso_cache/cso_hash.h
@@ -44,6 +44,7 @@
 #ifndef CSO_HASH_H
 #define CSO_HASH_H
 
+#include "pipe/p_compiler.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -68,14 +69,26 @@ int              cso_hash_size(struct cso_hash *hash);
 
 
 /**
- * Create a list of objects and just add entry with the same key to the list.
+ * Adds a data with the given key to the hash. If entry with the given
+ * key is already in the hash, this current entry is instered before it
+ * in the collision list.
+ * Function returns iterator pointing to the inserted item in the hash.
  */
 struct cso_hash_iter cso_hash_insert(struct cso_hash *hash, unsigned key,
                                      void *data);
+/**
+ * Removes the item pointed to by the current iterator from the hash.
+ * Note that the data itself is not erased and if it was a malloc'ed pointer
+ * it will have to be freed after calling this function by the callee.
+ * Function returns iterator pointing to the item after the removed one in
+ * the hash.
+ */
+struct cso_hash_iter cso_hash_erase(struct cso_hash *hash, struct cso_hash_iter iter);
 
 void  *cso_hash_take(struct cso_hash *hash, unsigned key);
 
 
+
 struct cso_hash_iter cso_hash_first_node(struct cso_hash *hash);
 
 /**
@@ -83,6 +96,11 @@ struct cso_hash_iter cso_hash_first_node(struct cso_hash *hash);
  */
 struct cso_hash_iter cso_hash_find(struct cso_hash *hash, unsigned key);
 
+/**
+ * Returns true if a value with the given key exists in the hash
+ */
+boolean   cso_hash_contains(struct cso_hash *hash, unsigned key);
+
 
 int       cso_hash_iter_is_null(struct cso_hash_iter iter);
 unsigned  cso_hash_iter_key(struct cso_hash_iter iter);
@@ -94,12 +112,12 @@ struct cso_hash_iter cso_hash_iter_prev(struct cso_hash_iter iter);
 
 
 /**
- * Convenience routine to iterate over the collision list while doing a memory 
+ * Convenience routine to iterate over the collision list while doing a memory
  * comparison to see which entry in the list is a direct copy of our template
  * and returns that entry.
- */ 
+ */
 void *cso_hash_find_data_from_template( struct cso_hash *hash,
-                                       unsigned hash_key, 
+                                       unsigned hash_key,
                                        void *templ,
                                        int size );