gallium: add async debug message forwarding helper

v2: use util_vasprintf for Windows portability

Reviewed-by: Marek Olšák <[email protected]> (v1)

1 files changed, 74 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_async_debug.h b/src/gallium/auxiliary/util/u_async_debug.h
new file mode 100644
index 00000000000..be783dc87cb
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_async_debug.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2017 Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+/**
+ * \file u_async_debug.h
+ * Provides a helper implementation of pipe_debug_callback which allows debug
+ * messages from non-application threads to be passed back to the application
+ * thread.
+ */
+
+#ifndef UTIL_ASYNC_DEBUG_H
+#define UTIL_ASYNC_DEBUG_H
+
+#include "pipe/p_state.h"
+
+#include "util/simple_mtx.h"
+
+struct util_debug_message {
+   unsigned *id;
+   enum pipe_debug_type type;
+   char *msg;
+};
+
+struct util_async_debug_callback {
+   struct pipe_debug_callback base;
+
+   simple_mtx_t lock;
+   unsigned count;
+   unsigned max;
+   struct util_debug_message *messages;
+};
+
+void
+u_async_debug_init(struct util_async_debug_callback *adbg);
+void
+u_async_debug_cleanup(struct util_async_debug_callback *adbg);
+
+void
+_u_async_debug_drain(struct util_async_debug_callback *adbg,
+                     struct pipe_debug_callback *dst);
+
+static inline void
+u_async_debug_drain(struct util_async_debug_callback *adbg,
+                    struct pipe_debug_callback *dst)
+{
+   /* Read the count without taking the lock to avoid atomics in the fast path.
+    * We'll re-read the count after taking the lock. */
+   if (adbg->count)
+      _u_async_debug_drain(adbg, dst);
+}
+
+#endif /* UTIL_ASYNC_DEBUG_H */