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GPUVertBuf: Add handle refcount

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A handle refcount is here to avoid freeing of the GPUVertBuf datablock
if it is still referenced somewhere else.

This does not prevent deleting the actual data. This is to avoid too
much zombie data usage.

This is in order to avoid most hacks inside `draw_instance_data.c`.
This commit is contained in:
Clément Foucault
2020-08-10 01:35:59 +02:00
parent 93165cbf47
commit 00a3c297d2
2 changed files with 24 additions and 1 deletions
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19
source/blender/gpu/intern/gpu_vertex_buffer.cc
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@@ -77,6 +77,7 @@ void GPU_vertbuf_init(GPUVertBuf *verts, GPUUsageType usage)
memset(verts, 0, sizeof(GPUVertBuf));
verts->usage = usage;
verts->dirty = true;
verts->handle_refcount = 1;
}
void GPU_vertbuf_init_with_format_ex(GPUVertBuf *verts,
@@ -137,7 +138,23 @@ void GPU_vertbuf_clear(GPUVertBuf *verts)
void GPU_vertbuf_discard(GPUVertBuf *verts)
{
GPU_vertbuf_clear(verts);
MEM_freeN(verts);
GPU_vertbuf_handle_ref_remove(verts);
}
void GPU_vertbuf_handle_ref_add(GPUVertBuf *verts)
{
verts->handle_refcount++;
}
void GPU_vertbuf_handle_ref_remove(GPUVertBuf *verts)
{
BLI_assert(verts->handle_refcount > 0);
verts->handle_refcount--;
if (verts->handle_refcount == 0) {
/* Should already have been cleared. */
BLI_assert(verts->vbo_id == 0 && verts->data == NULL);
MEM_freeN(verts);
}
}
uint GPU_vertbuf_size_get(const GPUVertBuf *verts)