gallium: Unify reference counting.

The core reference counting code is centralized in p_refcnt.h.

This has some consequences related to struct pipe_buffer:

* The screen member of struct pipe_buffer must be initialized, or
  pipe_buffer_reference() will crash trying to destroy a buffer with reference
  count 0. u_simple_screen takes care of this, but I may have missed some of
  the drivers not using it.
* Except for rare exceptions deep in winsys code, buffers must always be
  allocated via pipe_buffer_create() or via screen->*buffer_create() rather
  than via winsys->*buffer_create().

1 files changed, 10 insertions, 2 deletions

diff --git a/src/gallium/drivers/trace/tr_state.c b/src/gallium/drivers/trace/tr_state.c
index 81a9e2376e..0f175cd31c 100644
--- a/src/gallium/drivers/trace/tr_state.c
+++ b/src/gallium/drivers/trace/tr_state.c
@@ -50,6 +50,14 @@ void trace_dump_block(const struct pipe_format_block *block)
 }
 
 
+static void trace_dump_reference(const struct pipe_reference *reference)
+{
+   trace_dump_struct_begin("pipe_reference");
+   trace_dump_member(uint, reference, count);
+   trace_dump_struct_end();
+}
+
+
 void trace_dump_template(const struct pipe_texture *templat)
 {
    if(!templat) {
@@ -397,6 +405,8 @@ void trace_dump_surface(const struct pipe_surface *state)
 
    trace_dump_struct_begin("pipe_surface");
 
+   trace_dump_reference(&state->reference);
+
    trace_dump_member(format, state, format);
    trace_dump_member(uint, state, status);
    trace_dump_member(uint, state, clear_value);
@@ -405,7 +415,6 @@ void trace_dump_surface(const struct pipe_surface *state)
 
    trace_dump_member(uint, state, layout);
    trace_dump_member(uint, state, offset);
-   trace_dump_member(uint, state, refcount);
    trace_dump_member(uint, state, usage);
 
    trace_dump_member(ptr, state, texture);
@@ -437,7 +446,6 @@ void trace_dump_transfer(const struct pipe_transfer *state)
    trace_dump_member(uint, state, nblocksx);
    trace_dump_member(uint, state, nblocksy);
    trace_dump_member(uint, state, stride);
-   trace_dump_member(uint, state, refcount);
    trace_dump_member(uint, state, usage);
 
    trace_dump_member(ptr, state, texture);