Brendan McGrath : winegstreamer: Use process affinity to calculate thread_count.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d4e95ede4f44a5c06278a27df929e8d9f6ce9263
URL:    https://gitlab.winehq.org/wine/wine/-/commit/d4e95ede4f44a5c06278a27df929e8d...

Author: Brendan McGrath 
Date:   Wed Jun 26 11:35:32 2024 +1000

winegstreamer: Use process affinity to calculate thread_count.

---

dlls/winegstreamer/unixlib.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/dlls/winegstreamer/unixlib.c b/dlls/winegstreamer/unixlib.c
index 175ab92ecdc..fe432070cd8 100644
--- a/dlls/winegstreamer/unixlib.c
+++ b/dlls/winegstreamer/unixlib.c
@@ -47,6 +47,8 @@

GST_DEBUG_CATEGORY(wine);

+static UINT thread_count;
+
 GstStreamType stream_type_from_caps(GstCaps *caps)
 {
     const gchar *media_type;
@@ -244,6 +246,17 @@ bool push_event(GstPad *pad, GstEvent *event)
     return true;
 }

+static ULONG popcount(ULONG val)
+{
+#if HAVE___BUILTIN_POPCOUNT
+    return __builtin_popcount(val);
+#else
+    val -= val >> 1 & 0x55555555;
+    val = (val & 0x33333333) + (val >> 2 & 0x33333333);
+    return ((val + (val >> 4)) & 0x0f0f0f0f) * 0x01010101 >> 24;
+#endif
+}
+
 NTSTATUS wg_init_gstreamer(void *arg)
 {
     struct wg_init_gstreamer_params *params = arg;
@@ -253,6 +266,7 @@ NTSTATUS wg_init_gstreamer(void *arg)
     int argc = ARRAY_SIZE(args) - 1;
     char **argv = args;
     GError *err;
+    DWORD_PTR process_mask;

if (params->trace_on)
         setenv("GST_DEBUG", "WINE:9,4", FALSE);
@@ -276,6 +290,12 @@ NTSTATUS wg_init_gstreamer(void *arg)
         return STATUS_UNSUCCESSFUL;
     }

+    if (!NtQueryInformationProcess(GetCurrentProcess(),
+            ProcessAffinityMask, &process_mask, sizeof(process_mask), NULL))
+        thread_count = popcount(process_mask);
+    else
+        thread_count = 0;
+
     GST_DEBUG_CATEGORY_INIT(wine, "WINE", GST_DEBUG_FG_RED, "Wine GStreamer support");

GST_INFO("GStreamer library version %s; wine built with %d.%d.%d.",