Expose SignalSyncPoint through MGL api

mojo/public/platform/native/mgl_signal_sync_point_thunks.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_PUBLIC_PLATFORM_NATIVE_MGL_SIGNAL_SYNC_POINT_THUNKS_H_
+#define MOJO_PUBLIC_PLATFORM_NATIVE_MGL_SIGNAL_SYNC_POINT_THUNKS_H_
+
+#include <stddef.h>
+
+#include "mojo/public/c/gpu/MGL/mgl_signal_sync_point.h"
+
+// Structure used to bind the MGL signal sync point interface DSO to those
+// of the embedder.
+//
+// This is the ABI between the embedder and the DSO. It can only have new
+// functions added to the end. No other changes are supported.
+#pragma pack(push, 8)
+struct MGLSignalSyncPointThunks {
+  size_t size;  // Should be set to sizeof(MGLSignalSyncPointThunks).
+
+  void (*MGLSignalSyncPoint)(uint32_t sync_point,
+                             MGLSignalSyncPointCallback callback,
+                             void* lost_callback_closure);
+};
+#pragma pack(pop)
+
+#ifdef __cplusplus
+// Intended to be called from the embedder. Returns an object initialized to
+// contain pointers to each of the embedder's MGLSignalSyncPointThunks
+// functions.
+inline struct MGLSignalSyncPointThunks MojoMakeMGLSignalSyncPointThunks() {
+  struct MGLSignalSyncPointThunks mgl_thunks = {
+      sizeof(struct MGLSignalSyncPointThunks), MGLSignalSyncPoint,
+  };
+
+  return mgl_thunks;
+}
+#endif  // __cplusplus
+
+// Use this type for the function found by dynamically discovering it in
+// a DSO linked with mojo_system. For example:
+// MojoSetMGLSignalSyncPointThunksFn mojo_set_gles2_thunks_fn =
+//     reinterpret_cast<MojoSetMGLSignalSyncPointThunksFn>(
+//         app_library.GetFunctionPointer("MojoSetMGLSignalSyncPointThunks"));
+// The expected size of |mgl_thunks| is returned.
+// The contents of |mgl_thunks| are copied.
+typedef size_t (*MojoSetMGLSignalSyncPointThunksFn)(
+    const struct MGLSignalSyncPointThunks* mgl_signal_sync_point_thunks);
+
+#endif  // MOJO_PUBLIC_PLATFORM_NATIVE_MGL_THUNKS_H_

[viettrungluu, 2015/08/28 20:20:34]

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