mesa: add glInternalSetError for glthread

glthread wants to set GL errors, but has to do it by adding the SetError
call into the queue for it to be thread-safe.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7053>

src/mapi/glapi/gen/gl_API.xml

@@ -13305,6 +13305,11 @@
         <param name="named" type="GLboolean"/>
         <param name="ext_dsa" type="GLboolean"/>
     </function>
+
+    <!-- Set a GL error. Used by glthread to set errors without syncing. -->
+    <function name="InternalSetError" es2="2.0">
+        <param name="error" type="GLenum"/>
+    </function>
 </category>
 
 <xi:include href="OES_EGL_image.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>

src/mapi/glapi/gen/static_data.py

@@ -1676,6 +1676,7 @@ offsets = {
     "FogCoordhvNV": 1640,
     "SecondaryColor3hNV": 1641,
     "SecondaryColor3hvNV": 1642,
+    "InternalSetError": 1643,
 }
 
 functions = [

src/mesa/main/errors.c

@@ -432,3 +432,13 @@ _mesa_shader_debug(struct gl_context *ctx, GLenum type, GLuint *id,
 
    _mesa_log_msg(ctx, source, type, *id, severity, len, msg);
 }
+
+/**
+ * Set the parameter as the current GL error. Used by glthread.
+ */
+void GLAPIENTRY
+_mesa_InternalSetError(GLenum error)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   _mesa_error(ctx, error, "glthread");
+}

src/mesa/main/errors.h

@@ -109,6 +109,8 @@ _mesa_gl_debug(struct gl_context *ctx,
    }                                                                      \
 } while (0)
 
+void GLAPIENTRY
+_mesa_InternalSetError(GLenum error);
 
 #ifdef __cplusplus
 }

src/mesa/main/tests/dispatch_sanity.cpp

@@ -1443,6 +1443,7 @@ const struct function common_desktop_functions_possible[] = {
    { "glViewportSwizzleNV", 11, -1 },
 
    { "glInternalBufferSubDataCopyMESA", 11, -1 },
+   { "glInternalSetError", 20, -1 },
 
    { NULL, 0, -1 }
 };
@@ -2494,6 +2495,7 @@ const struct function gles2_functions_possible[] = {
    { "glMaxShaderCompilerThreadsKHR", 20, -1 },
 
    { "glInternalBufferSubDataCopyMESA", 20, -1 },
+   { "glInternalSetError", 20, -1 },
 
    { NULL, 0, -1 }
 };