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gallium: Unify reference counting.

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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().
This commit is contained in:
Michel Dänzer
2009-03-04 11:58:48 +01:00
parent 60041203d5
commit 5e27cd46c0
102 changed files with 653 additions and 943 deletions
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24
src/gallium/state_trackers/python/st_device.c
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@@ -51,11 +51,20 @@ st_device_really_destroy(struct st_device *st_dev)
}
static void
st_device_reference(struct st_device **ptr, struct st_device *st_dev)
{
struct st_device *old_dev = *ptr;
if (pipe_reference((struct pipe_reference **)ptr, &st_dev->reference))
st_device_really_destroy(old_dev);
}
void
st_device_destroy(struct st_device *st_dev)
{
if(!--st_dev->refcount)
st_device_really_destroy(st_dev);
st_device_reference(&st_dev, NULL);
}
@@ -72,7 +81,7 @@ st_device_create_from_st_winsys(const struct st_winsys *st_ws)
if(!st_dev)
return NULL;
st_dev->refcount = 1;
pipe_reference_init(&st_dev->reference, 1);
st_dev->st_ws = st_ws;
st_dev->real_screen = st_ws->screen_create();
@@ -124,8 +133,7 @@ st_context_destroy(struct st_context *st_ctx)
FREE(st_ctx);
if(!--st_dev->refcount)
st_device_really_destroy(st_dev);
st_device_reference(&st_dev, NULL);
}
}
@@ -139,8 +147,7 @@ st_context_create(struct st_device *st_dev)
if(!st_ctx)
return NULL;
st_ctx->st_dev = st_dev;
++st_dev->refcount;
st_device_reference(&st_ctx->st_dev, st_dev);
st_ctx->real_pipe = st_dev->st_ws->context_create(st_dev->real_screen);
if(!st_ctx->real_pipe) {
@@ -292,8 +299,7 @@ void
st_buffer_destroy(struct st_buffer *st_buf)
{
if(st_buf) {
struct pipe_screen *screen = st_buf->st_dev->screen;
pipe_buffer_reference(screen, &st_buf->buffer, NULL);
pipe_buffer_reference(&st_buf->buffer, NULL);
FREE(st_buf);
}
}