Mesa (master): mesa: create locked version of HashWalk

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: a82d6a307d0cfc1e4434bbecb1b308b94b1ca462
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a82d6a307d0cfc1e4434bbecb1b308b94b1ca462

Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Mon Apr 24 15:59:23 2017 +1000

mesa: create locked version of HashWalk

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>

---

 src/mesa/main/hash.c | 34 ++++++++++++++++++++++++++--------
 src/mesa/main/hash.h |  5 +++++
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/src/mesa/main/hash.c b/src/mesa/main/hash.c
index b7a7bd9f64..a3772bdfb5 100644
--- a/src/mesa/main/hash.c
+++ b/src/mesa/main/hash.c
@@ -411,6 +411,23 @@ _mesa_HashDeleteAll(struct _mesa_HashTable *table,
  * \param userData  arbitrary pointer to pass along to the callback
  *                  (this is typically a struct gl_context pointer)
  */
+static void
+hash_walk_unlocked(const struct _mesa_HashTable *table,
+                   void (*callback)(GLuint key, void *data, void *userData),
+                   void *userData)
+{
+   assert(table);
+   assert(callback);
+
+   struct hash_entry *entry;
+   hash_table_foreach(table->ht, entry) {
+      callback((uintptr_t)entry->key, entry->data, userData);
+   }
+   if (table->deleted_key_data)
+      callback(DELETED_KEY_VALUE, table->deleted_key_data, userData);
+}
+
+
 void
 _mesa_HashWalk(const struct _mesa_HashTable *table,
                void (*callback)(GLuint key, void *data, void *userData),
@@ -418,19 +435,20 @@ _mesa_HashWalk(const struct _mesa_HashTable *table,
 {
    /* cast-away const */
    struct _mesa_HashTable *table2 = (struct _mesa_HashTable *) table;
-   struct hash_entry *entry;
 
-   assert(table);
-   assert(callback);
    mtx_lock(&table2->Mutex);
-   hash_table_foreach(table->ht, entry) {
-      callback((uintptr_t)entry->key, entry->data, userData);
-   }
-   if (table->deleted_key_data)
-      callback(DELETED_KEY_VALUE, table->deleted_key_data, userData);
+   hash_walk_unlocked(table, callback, userData);
    mtx_unlock(&table2->Mutex);
 }
 
+void
+_mesa_HashWalkLocked(const struct _mesa_HashTable *table,
+               void (*callback)(GLuint key, void *data, void *userData),
+               void *userData)
+{
+   hash_walk_unlocked(table, callback, userData);
+}
+
 static void
 debug_print_entry(GLuint key, void *data, void *userData)
 {
diff --git a/src/mesa/main/hash.h b/src/mesa/main/hash.h
index 52a6c5d9dd..9eb0f0eac6 100644
--- a/src/mesa/main/hash.h
+++ b/src/mesa/main/hash.h
@@ -66,6 +66,11 @@ _mesa_HashWalk(const struct _mesa_HashTable *table,
                void (*callback)(GLuint key, void *data, void *userData),
                void *userData);
 
+extern void
+_mesa_HashWalkLocked(const struct _mesa_HashTable *table,
+                     void (*callback)(GLuint key, void *data, void *userData),
+                     void *userData);
+
 extern void _mesa_HashPrint(const struct _mesa_HashTable *table);
 
 extern GLuint _mesa_HashFindFreeKeyBlock(struct _mesa_HashTable *table, GLuint numKeys);