d3d11: Use std::call_once()

g_once_init_enter() always takes global mutex for non-GCC build.
Use C++ once call implementation

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2843>

subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11_private.h

@@ -145,6 +145,8 @@ gboolean        gst_d3d11_color_primaries_matrix_unorm (const GstVideoColorPrima
 G_END_DECLS
 
 #ifdef __cplusplus
+#include <mutex>
+
 class GstD3D11DeviceLockGuard
 {
 public:
@@ -162,6 +164,13 @@ public:
   GstD3D11DeviceLockGuard& operator=(const GstD3D11DeviceLockGuard&) = delete;
 
 private:
-    GstD3D11Device *device_;
+  GstD3D11Device *device_;
 };
-#endif
+
+#define GST_D3D11_CALL_ONCE_BEGIN \
+    static std::once_flag __once_flag; \
+    std::call_once (__once_flag, [&]()
+
+#define GST_D3D11_CALL_ONCE_END )
+
+#endif /* __cplusplus */

subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11compile.cpp

@@ -24,6 +24,7 @@
 #include "gstd3d11compile.h"
 #include "gstd3d11device.h"
 #include "gstd3d11utils.h"
+#include "gstd3d11_private.h"
 #include <gmodule.h>
 #include <wrl.h>
 #include <string.h>
@@ -37,18 +38,13 @@ using namespace Microsoft::WRL;
 static GstDebugCategory *
 ensure_debug_category (void)
 {
-  static gsize cat_gonce = 0;
+  static GstDebugCategory *cat = nullptr;
 
-  if (g_once_init_enter (&cat_gonce)) {
-    gsize cat_done;
+  GST_D3D11_CALL_ONCE_BEGIN {
+    cat = _gst_debug_category_new ("d3d11compile", 0, "d3d11compile");
+  } GST_D3D11_CALL_ONCE_END;
 
-    cat_done = (gsize) _gst_debug_category_new ("d3d11compile", 0,
-        "d3d11compile");
-
-    g_once_init_leave (&cat_gonce, cat_done);
-  }
-
-  return (GstDebugCategory *) cat_gonce;
+  return cat;
 }
 #else
 #define ensure_debug_category() /* NOOP */
@@ -67,9 +63,7 @@ static pD3DCompile GstD3DCompileFunc = nullptr;
 gboolean
 gst_d3d11_compile_init (void)
 {
-  static gsize init_once = 0;
-
-  if (g_once_init_enter (&init_once)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
 #if GST_D3D11_WINAPI_ONLY_APP
     /* Assuming that d3d compiler library is available */
     GstD3DCompileFunc = D3DCompile;
@@ -103,9 +97,8 @@ gst_d3d11_compile_init (void)
     if (!GstD3DCompileFunc)
       GST_WARNING ("D3D11 compiler library is unavailable");
 #endif
-
-    g_once_init_leave (&init_once, 1);
   }
+  GST_D3D11_CALL_ONCE_END;
 
   if (!GstD3DCompileFunc)
     return FALSE;

subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11converter.cpp

@@ -42,7 +42,7 @@ DEFINE_ENUM_FLAG_OPERATORS (GstD3D11ConverterBackend);
 GType
 gst_d3d11_converter_backend_get_type (void)
 {
-  static gsize type = 0;
+  static GType type = 0;
   static const GFlagsValue values[] = {
     {GST_D3D11_CONVERTER_BACKEND_SHADER, "GST_D3D11_CONVERTER_BACKEND_SHADER",
         "shader"},
@@ -51,12 +51,11 @@ gst_d3d11_converter_backend_get_type (void)
     {0, nullptr, nullptr}
   };
 
-  if (g_once_init_enter (&type)) {
-    GType tmp = g_flags_register_static ("GstD3D11ConverterBackend", values);
-    g_once_init_leave (&type, tmp);
-  }
+  GST_D3D11_CALL_ONCE_BEGIN {
+    type = g_flags_register_static ("GstD3D11ConverterBackend", values);
+  } GST_D3D11_CALL_ONCE_END;
 
-  return (GType) type;
+  return type;
 }
 
 /* *INDENT-OFF* */

subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11device.cpp

@@ -54,7 +54,6 @@ using namespace Microsoft::WRL;
 
 #if HAVE_D3D11SDKLAYERS_H
 #include <d3d11sdklayers.h>
-static GModule *d3d11_debug_module = NULL;
 
 /* mingw header does not define D3D11_RLDO_IGNORE_INTERNAL
  * D3D11_RLDO_SUMMARY = 0x1,
@@ -68,8 +67,7 @@ static GModule *d3d11_debug_module = NULL;
 #include <dxgidebug.h>
 typedef HRESULT (WINAPI * DXGIGetDebugInterface_t) (REFIID riid,
     void **ppDebug);
-static GModule *dxgi_debug_module = NULL;
-static DXGIGetDebugInterface_t GstDXGIGetDebugInterface = NULL;
+static DXGIGetDebugInterface_t GstDXGIGetDebugInterface = nullptr;
 
 #endif
 
@@ -134,17 +132,14 @@ struct _GstD3D11DevicePrivate
 static void
 debug_init_once (void)
 {
-  static gsize init_once = 0;
-
-  if (g_once_init_enter (&init_once)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
     GST_DEBUG_CATEGORY_INIT (gst_d3d11_device_debug,
         "d3d11device", 0, "d3d11 device object");
 #if defined(HAVE_D3D11SDKLAYERS_H) || defined(HAVE_DXGIDEBUG_H)
     GST_DEBUG_CATEGORY_INIT (gst_d3d11_debug_layer_debug,
         "d3d11debuglayer", 0, "native d3d11 and dxgi debug");
 #endif
-    g_once_init_leave (&init_once, 1);
-  }
+  } GST_D3D11_CALL_ONCE_END;
 }
 
 #define gst_d3d11_device_parent_class parent_class
@@ -160,26 +155,24 @@ static void gst_d3d11_device_finalize (GObject * object);
 static gboolean
 gst_d3d11_device_enable_d3d11_debug (void)
 {
-  static gsize _init = 0;
-
+  static GModule *d3d11_debug_module = nullptr;
   /* If all below libraries are unavailable, d3d11 device would fail with
    * D3D11_CREATE_DEVICE_DEBUG flag */
-  if (g_once_init_enter (&_init)) {
-    d3d11_debug_module =
-        g_module_open ("d3d11sdklayers.dll", G_MODULE_BIND_LAZY);
+  static const gchar *sdk_dll_names[] = {
+    "d3d11sdklayers.dll",
+    "d3d11_1sdklayers.dll",
+    "d3d11_2sdklayers.dll",
+    "d3d11_3sdklayers.dll",
+  };
 
-    if (!d3d11_debug_module)
-      d3d11_debug_module =
-          g_module_open ("d3d11_1sdklayers.dll", G_MODULE_BIND_LAZY);
-    if (!d3d11_debug_module)
-      d3d11_debug_module =
-          g_module_open ("d3d11_2sdklayers.dll", G_MODULE_BIND_LAZY);
-    if (!d3d11_debug_module)
-      d3d11_debug_module =
-          g_module_open ("d3d11_3sdklayers.dll", G_MODULE_BIND_LAZY);
-
-    g_once_init_leave (&_init, 1);
+  GST_D3D11_CALL_ONCE_BEGIN {
+    for (guint i = 0; i < G_N_ELEMENTS (sdk_dll_names); i++) {
+      d3d11_debug_module = g_module_open (sdk_dll_names[i], G_MODULE_BIND_LAZY);
+      if (d3d11_debug_module)
+        return;
+    }
   }
+  GST_D3D11_CALL_ONCE_END;
 
   if (d3d11_debug_module)
     return TRUE;
@@ -265,27 +258,24 @@ gst_d3d11_device_d3d11_debug (GstD3D11Device * device,
 static gboolean
 gst_d3d11_device_enable_dxgi_debug (void)
 {
-  static gsize _init = 0;
-  gboolean ret = FALSE;
+  static GModule *dxgi_debug_module = nullptr;
 
-  /* If all below libraries are unavailable, d3d11 device would fail with
-   * D3D11_CREATE_DEVICE_DEBUG flag */
-  if (g_once_init_enter (&_init)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
 #if (!GST_D3D11_WINAPI_ONLY_APP)
     dxgi_debug_module = g_module_open ("dxgidebug.dll", G_MODULE_BIND_LAZY);
 
     if (dxgi_debug_module)
       g_module_symbol (dxgi_debug_module,
           "DXGIGetDebugInterface", (gpointer *) & GstDXGIGetDebugInterface);
-    if (GstDXGIGetDebugInterface)
-      ret = TRUE;
 #else
-    ret = TRUE;
+    GstDXGIGetDebugInterface = DXGIGetDebugInterface1;
 #endif
-    g_once_init_leave (&_init, 1);
-  }
+  } GST_D3D11_CALL_ONCE_END;
 
-  return ret;
+  if (!GstDXGIGetDebugInterface)
+    return FALSE;
+
+  return TRUE;
 }
 
 static HRESULT
@@ -429,19 +419,16 @@ gst_d3d11_device_init (GstD3D11Device * self)
 static gboolean
 is_windows_8_or_greater (void)
 {
-  static gsize version_once = 0;
   static gboolean ret = FALSE;
 
-  if (g_once_init_enter (&version_once)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
 #if (!GST_D3D11_WINAPI_ONLY_APP)
     if (IsWindows8OrGreater ())
       ret = TRUE;
 #else
     ret = TRUE;
 #endif
-
-    g_once_init_leave (&version_once, 1);
-  }
+  } GST_D3D11_CALL_ONCE_END;
 
   return ret;
 }

subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11format.cpp

@@ -34,18 +34,13 @@
 static GstDebugCategory *
 ensure_debug_category (void)
 {
-  static gsize cat_gonce = 0;
+  static GstDebugCategory *cat = nullptr;
 
-  if (g_once_init_enter (&cat_gonce)) {
-    gsize cat_done;
+  GST_D3D11_CALL_ONCE_BEGIN {
+    cat = _gst_debug_category_new ("d3d11format", 0, "d3d11 specific formats");
+  } GST_D3D11_CALL_ONCE_END;
 
-    cat_done = (gsize) _gst_debug_category_new ("d3d11format", 0,
-        "d3d11 specific formats");
-
-    g_once_init_leave (&cat_gonce, cat_done);
-  }
-
-  return (GstDebugCategory *) cat_gonce;
+  return cat;
 }
 #else
 #define ensure_debug_category() /* NOOP */
@@ -54,7 +49,7 @@ ensure_debug_category (void)
 GType
 gst_d3d11_format_support_get_type (void)
 {
-  static gsize support_type = 0;
+  static GType support_type = 0;
   static const GFlagsValue support_values[] = {
     {D3D11_FORMAT_SUPPORT_BUFFER, "BUFFER", "buffer"},
     {D3D11_FORMAT_SUPPORT_IA_VERTEX_BUFFER, "IA_VERTEX_BUFFER",
@@ -103,13 +98,12 @@ gst_d3d11_format_support_get_type (void)
     {0, nullptr, nullptr}
   };
 
-  if (g_once_init_enter (&support_type)) {
-    GType tmp = g_flags_register_static ("GstD3D11FormatSupport",
+  GST_D3D11_CALL_ONCE_BEGIN {
+    support_type = g_flags_register_static ("GstD3D11FormatSupport",
         support_values);
-    g_once_init_leave (&support_type, tmp);
-  }
+  } GST_D3D11_CALL_ONCE_END;
 
-  return (GType) support_type;
+  return support_type;
 }
 
 /**

subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11memory.cpp

@@ -36,7 +36,7 @@ static GstAllocator *_d3d11_memory_allocator;
 GType
 gst_d3d11_allocation_flags_get_type (void)
 {
-  static gsize type = 0;
+  static GType type = 0;
   static const GFlagsValue values[] = {
     {GST_D3D11_ALLOCATION_FLAG_DEFAULT, "GST_D3D11_ALLOCATION_FLAG_DEFAULT",
         "default"},
@@ -45,18 +45,17 @@ gst_d3d11_allocation_flags_get_type (void)
     {0, nullptr, nullptr}
   };
 
-  if (g_once_init_enter (&type)) {
-    GType tmp = g_flags_register_static ("GstD3D11AllocationFlags", values);
-    g_once_init_leave (&type, tmp);
-  }
+  GST_D3D11_CALL_ONCE_BEGIN {
+    type = g_flags_register_static ("GstD3D11AllocationFlags", values);
+  } GST_D3D11_CALL_ONCE_END;
 
-  return (GType) type;
+  return type;
 }
 
 GType
 gst_d3d11_memory_transfer_get_type (void)
 {
-  static gsize type = 0;
+  static GType type = 0;
   static const GFlagsValue values[] = {
     {GST_D3D11_MEMORY_TRANSFER_NEED_DOWNLOAD,
         "GST_D3D11_MEMORY_TRANSFER_NEED_DOWNLOAD", "need-download"},
@@ -65,18 +64,17 @@ gst_d3d11_memory_transfer_get_type (void)
     {0, nullptr, nullptr}
   };
 
-  if (g_once_init_enter (&type)) {
-    GType tmp = g_flags_register_static ("GstD3D11MemoryTransfer", values);
-    g_once_init_leave (&type, tmp);
-  }
+  GST_D3D11_CALL_ONCE_BEGIN {
+    type = g_flags_register_static ("GstD3D11MemoryTransfer", values);
+  } GST_D3D11_CALL_ONCE_END;
 
-  return (GType) type;
+  return type;
 }
 
 GType
 gst_d3d11_memory_native_type_get_type (void)
 {
-  static gsize type = 0;
+  static GType type = 0;
   static const GEnumValue values[] = {
     {GST_D3D11_MEMORY_NATIVE_TYPE_INVALID,
         "GST_D3D11_MEMORY_NATIVE_TYPE_INVALID", "invalid"},
@@ -87,12 +85,11 @@ gst_d3d11_memory_native_type_get_type (void)
     {0, nullptr, nullptr}
   };
 
-  if (g_once_init_enter (&type)) {
-    GType tmp = g_enum_register_static ("GstD3D11MemoryNativeType", values);
-    g_once_init_leave (&type, tmp);
-  }
+  GST_D3D11_CALL_ONCE_BEGIN {
+    type = g_enum_register_static ("GstD3D11MemoryNativeType", values);
+  } GST_D3D11_CALL_ONCE_END;
 
-  return (GType) type;
+  return type;
 }
 
 /* GstD3D11AllocationParams */
@@ -650,10 +647,7 @@ gst_d3d11_memory_get_native_type (GstD3D11Memory * mem)
 void
 gst_d3d11_memory_init_once (void)
 {
-  static gsize _init = 0;
-
-  if (g_once_init_enter (&_init)) {
-
+  GST_D3D11_CALL_ONCE_BEGIN {
     GST_DEBUG_CATEGORY_INIT (gst_d3d11_allocator_debug, "d3d11allocator", 0,
         "Direct3D11 Texture Allocator");
 
@@ -662,8 +656,7 @@ gst_d3d11_memory_init_once (void)
     gst_object_ref_sink (_d3d11_memory_allocator);
 
     gst_allocator_register (GST_D3D11_MEMORY_NAME, _d3d11_memory_allocator);
-    g_once_init_leave (&_init, 1);
-  }
+  } GST_D3D11_CALL_ONCE_END;
 }
 
 /**

subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11utils.cpp

@@ -39,18 +39,13 @@ GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT);
 static GstDebugCategory *
 ensure_debug_category (void)
 {
-  static gsize cat_gonce = 0;
+  static GstDebugCategory *cat = nullptr;
 
-  if (g_once_init_enter (&cat_gonce)) {
-    gsize cat_done;
+  GST_D3D11_CALL_ONCE_BEGIN {
+    cat = _gst_debug_category_new ("d3d11utils", 0, "d3d11 utility functions");
+  } GST_D3D11_CALL_ONCE_END;
 
-    cat_done = (gsize) _gst_debug_category_new ("d3d11utils", 0,
-        "d3d11 utility functions");
-
-    g_once_init_leave (&cat_gonce, cat_done);
-  }
-
-  return (GstDebugCategory *) cat_gonce;
+  return cat;
 }
 #else
 #define ensure_debug_category() /* NOOP */
@@ -59,12 +54,9 @@ ensure_debug_category (void)
 static void
 _init_context_debug (void)
 {
-  static gsize _init = 0;
-
-  if (g_once_init_enter (&_init)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
     GST_DEBUG_CATEGORY_GET (GST_CAT_CONTEXT, "GST_CONTEXT");
-    g_once_init_leave (&_init, 1);
-  }
+  } GST_D3D11_CALL_ONCE_END;
 }
 
 /**

subprojects/gst-plugins-bad/sys/d3d11/gstd3d11decoder.cpp

@@ -387,14 +387,13 @@ gst_d3d11_decoder_is_configured (GstD3D11Decoder * decoder)
 static GQuark
 gst_d3d11_decoder_view_id_quark (void)
 {
-  static gsize id_quark = 0;
+  static GQuark id_quark = 0;
 
-  if (g_once_init_enter (&id_quark)) {
-    GQuark quark = g_quark_from_string ("GstD3D11DecoderViewId");
-    g_once_init_leave (&id_quark, quark);
-  }
+  GST_D3D11_CALL_ONCE_BEGIN {
+    id_quark = g_quark_from_string ("GstD3D11DecoderViewId");
+  } GST_D3D11_CALL_ONCE_END;
 
-  return (GQuark) id_quark;
+  return id_quark;
 }
 
 static gboolean

subprojects/gst-plugins-bad/sys/d3d11/gstd3d11deinterlace.cpp

@@ -106,9 +106,9 @@ typedef enum
 static GType
 gst_d3d11_deinterlace_method_type (void)
 {
-  static gsize method_type = 0;
+  static GType method_type = 0;
 
-  if (g_once_init_enter (&method_type)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
     static const GFlagsValue method_types[] = {
       {GST_D3D11_DEINTERLACE_METHOD_BLEND,
           "Blend: Blending top/bottom field pictures into one frame. "
@@ -123,14 +123,14 @@ gst_d3d11_deinterlace_method_type (void)
       {GST_D3D11_DEINTERLACE_METHOD_MOTION_COMPENSATION,
           "Motion Compensation: Recreating missing lines by using motion vector. "
             "Framerate will be doubled (e,g, 60i -> 60p)", "mocomp"},
-      {0, NULL, NULL},
+      {0, nullptr, nullptr},
     };
-    GType tmp = g_flags_register_static ("GstD3D11DeinterlaceMethod",
-        method_types);
-    g_once_init_leave (&method_type, tmp);
-  }
 
-  return (GType) method_type;
+    method_type = g_flags_register_static ("GstD3D11DeinterlaceMethod",
+        method_types);
+  } GST_D3D11_CALL_ONCE_END;
+
+  return method_type;
 }
 
 typedef struct

subprojects/gst-plugins-bad/sys/d3d11/gstd3d11pluginutils.cpp

@@ -36,9 +36,7 @@ static guint _gst_d3d11_texture_max_dimension = 16384;
 void
 gst_d3d11_plugin_utils_init (D3D_FEATURE_LEVEL feature_level)
 {
-  static gsize _init_once = 0;
-
-  if (g_once_init_enter (&_init_once)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
     /* https://docs.microsoft.com/en-us/windows/win32/direct3d11/overviews-direct3d-11-devices-downlevel-intro */
     if (feature_level >= D3D_FEATURE_LEVEL_11_0)
       _gst_d3d11_texture_max_dimension = 16384;
@@ -46,9 +44,8 @@ gst_d3d11_plugin_utils_init (D3D_FEATURE_LEVEL feature_level)
       _gst_d3d11_texture_max_dimension = 8192;
     else
       _gst_d3d11_texture_max_dimension = 4096;
-
-    g_once_init_leave (&_init_once, 1);
   }
+  GST_D3D11_CALL_ONCE_END;
 }
 
 GstCaps *
@@ -75,19 +72,16 @@ gst_d3d11_get_updated_template_caps (GstStaticCaps * template_caps)
 gboolean
 gst_d3d11_is_windows_8_or_greater (void)
 {
-  static gsize version_once = 0;
   static gboolean ret = FALSE;
 
-  if (g_once_init_enter (&version_once)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
 #if (!GST_D3D11_WINAPI_ONLY_APP)
     if (IsWindows8OrGreater ())
       ret = TRUE;
 #else
     ret = TRUE;
 #endif
-
-    g_once_init_leave (&version_once, 1);
-  }
+  } GST_D3D11_CALL_ONCE_END;
 
   return ret;
 }

subprojects/gst-plugins-bad/sys/d3d11/gstd3d11testsrc.cpp

@@ -72,9 +72,9 @@ typedef enum
 static GType
 gst_d3d11_test_src_pattern_get_type (void)
 {
-  static gsize pattern_type = 0;
+  static GType pattern_type = 0;
 
-  if (g_once_init_enter (&pattern_type)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
     static const GEnumValue pattern_types[] = {
       {GST_D3D11_TEST_SRC_SMPTE, "SMPTE 100% color bars", "smpte"},
       {GST_D3D11_TEST_SRC_SNOW, "Random (television snow)", "snow"},
@@ -89,12 +89,12 @@ gst_d3d11_test_src_pattern_get_type (void)
       {GST_D3D11_TEST_SRC_CHECKERS8, "Checkers 8px", "checkers-8"},
       {0, nullptr, nullptr},
     };
-    GType tmp = g_enum_register_static ("GstD3D11TestSrcPattern",
-        pattern_types);
-    g_once_init_leave (&pattern_type, tmp);
-  }
 
-  return (GType) pattern_type;
+    pattern_type = g_enum_register_static ("GstD3D11TestSrcPattern",
+        pattern_types);
+  } GST_D3D11_CALL_ONCE_END;
+
+  return pattern_type;
 }
 
 typedef struct

subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window.cpp

@@ -74,9 +74,9 @@ static guint d3d11_window_signals[SIGNAL_LAST] = { 0, };
 GType
 gst_d3d11_window_fullscreen_toggle_mode_type (void)
 {
-  static gsize mode_type = 0;
+  static GType mode_type = 0;
 
-  if (g_once_init_enter (&mode_type)) {
+  GST_D3D11_CALL_ONCE_BEGIN {
     static const GFlagsValue mode_types[] = {
       {GST_D3D11_WINDOW_FULLSCREEN_TOGGLE_MODE_NONE,
           "GST_D3D11_WINDOW_FULLSCREEN_TOGGLE_MODE_NONE", "none"},
@@ -84,14 +84,14 @@ gst_d3d11_window_fullscreen_toggle_mode_type (void)
           "GST_D3D11_WINDOW_FULLSCREEN_TOGGLE_MODE_ALT_ENTER", "alt-enter"},
       {GST_D3D11_WINDOW_FULLSCREEN_TOGGLE_MODE_PROPERTY,
           "GST_D3D11_WINDOW_FULLSCREEN_TOGGLE_MODE_PROPERTY", "property"},
-      {0, NULL, NULL},
+      {0, nullptr, nullptr},
     };
-    GType tmp = g_flags_register_static ("GstD3D11WindowFullscreenToggleMode",
-        mode_types);
-    g_once_init_leave (&mode_type, tmp);
-  }
 
-  return (GType) mode_type;
+    mode_type = g_flags_register_static ("GstD3D11WindowFullscreenToggleMode",
+        mode_types);
+  } GST_D3D11_CALL_ONCE_END;
+
+  return mode_type;
 }
 
 #define gst_d3d11_window_parent_class parent_class