Mesa (master): mesa: new _mesa_total_buffer_object_memory() debug function

[Brian Paul]

Module: Mesa
Branch: master
Commit: 223654b81ddb50cc42ed8cd722b389b302a26980
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=223654b81ddb50cc42ed8cd722b389b302a26980

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Apr  6 15:44:56 2012 -0600

mesa: new _mesa_total_buffer_object_memory() debug function

This function can be called in gdb to find out how much memory is used
by buffer objects.

---

 src/mesa/main/bufferobj.c |   30 ++++++++++++++++++++++++++++++
 src/mesa/main/bufferobj.h |    2 ++
 2 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index eef10c4..ae7bac1 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -347,6 +347,36 @@ _mesa_initialize_buffer_object( struct gl_context *ctx,
 }
 
 
+
+/**
+ * Callback called from _mesa_HashWalk()
+ */
+static void
+count_buffer_size(GLuint key, void *data, void *userData)
+{
+   const struct gl_buffer_object *bufObj =
+      (const struct gl_buffer_object *) data;
+   GLuint *total = (GLuint *) userData;
+
+   *total = *total + bufObj->Size;
+}
+
+
+/**
+ * Compute total size (in bytes) of all buffer objects for the given context.
+ * For debugging purposes.
+ */
+GLuint
+_mesa_total_buffer_object_memory(struct gl_context *ctx)
+{
+   GLuint total = 0;
+
+   _mesa_HashWalk(ctx->Shared->BufferObjects, count_buffer_size, &total);
+
+   return total;
+}
+
+
 /**
  * Allocate space for and store data in a buffer object.  Any data that was
  * previously stored in the buffer object is lost.  If \c data is \c NULL,
diff --git a/src/mesa/main/bufferobj.h b/src/mesa/main/bufferobj.h
index a7ce379..66343c3 100644
--- a/src/mesa/main/bufferobj.h
+++ b/src/mesa/main/bufferobj.h
@@ -89,6 +89,8 @@ _mesa_reference_buffer_object(struct gl_context *ctx,
       _mesa_reference_buffer_object_(ctx, ptr, bufObj);
 }
 
+extern GLuint
+_mesa_total_buffer_object_memory(struct gl_context *ctx);
 
 extern void
 _mesa_init_buffer_object_functions(struct dd_function_table *driver);