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d3d11: Serialize ensure_element_data() call

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It can be called any time from random thread. Thus, multiple
device objects can be created for the same physical device
if the call is not serialized, that's not a scenario we expect.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2727>
This commit is contained in:
Seungha Yang 2022-07-08 01:30:13 +09:00
parent 8aeb8ea58f
commit f3d51ef235
1 changed files with 12 additions and 0 deletions
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12
subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11utils.cpp
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@ -27,6 +27,11 @@
#include <windows.h> #include <windows.h>
#include <versionhelpers.h> #include <versionhelpers.h>
#include <mutex>
/* *INDENT-OFF* */
static std::recursive_mutex _context_lock;
/* *INDENT-ON* */
GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT); GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT);
#ifndef GST_DISABLE_GST_DEBUG #ifndef GST_DISABLE_GST_DEBUG
@ -380,6 +385,9 @@ gst_d3d11_ensure_element_data (GstElement * element, gint adapter,
GstD3D11Device ** device) GstD3D11Device ** device)
{ {
guint target_adapter = 0; guint target_adapter = 0;
/* *INDENT-OFF* */
std::lock_guard<std::recursive_mutex> lk (_context_lock);
/* *INDENT-ON* */
g_return_val_if_fail (element != NULL, FALSE); g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (device != NULL, FALSE); g_return_val_if_fail (device != NULL, FALSE);
@ -447,6 +455,10 @@ gboolean
gst_d3d11_ensure_element_data_for_adapter_luid (GstElement * element, gst_d3d11_ensure_element_data_for_adapter_luid (GstElement * element,
gint64 adapter_luid, GstD3D11Device ** device) gint64 adapter_luid, GstD3D11Device ** device)
{ {
/* *INDENT-OFF* */
std::lock_guard<std::recursive_mutex> lk (_context_lock);
/* *INDENT-ON* */
g_return_val_if_fail (element != NULL, FALSE); g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (device != NULL, FALSE); g_return_val_if_fail (device != NULL, FALSE);