auto import from //depot/cupcake/@135843
diff --git a/opengl/libs/hooks.h b/opengl/libs/hooks.h
new file mode 100644
index 0000000..63fb017
--- /dev/null
+++ b/opengl/libs/hooks.h
@@ -0,0 +1,134 @@
+/*
+ ** Copyright 2007, The Android Open Source Project
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ **
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ **
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ */
+
+#ifndef ANDROID_GLES_CM_HOOKS_H
+#define ANDROID_GLES_CM_HOOKS_H
+
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+
+#include <EGL/egl.h>
+#include <GLES/gl.h>
+
+#define GL_LOGGER 0
+#if !defined(__arm__)
+#define USE_SLOW_BINDING 1
+#else
+#define USE_SLOW_BINDING 0
+#endif
+#undef NELEM
+#define NELEM(x) (sizeof(x)/sizeof(*(x)))
+#define MAX_NUMBER_OF_GL_EXTENSIONS 32
+
+
+#if defined(HAVE_ANDROID_OS) && !USE_SLOW_BINDING && !GL_LOGGER && __OPTIMIZE__
+#define USE_FAST_TLS_KEY 1
+#else
+#define USE_FAST_TLS_KEY 0
+#endif
+
+#if USE_FAST_TLS_KEY
+# include <bionic_tls.h> /* special private C library header */
+#endif
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+// EGLDisplay are global, not attached to a given thread
+const unsigned int NUM_DISPLAYS = 1;
+
+enum {
+ IMPL_HARDWARE = 0,
+ IMPL_SOFTWARE,
+ IMPL_CONTEXT_LOST,
+ IMPL_NO_CONTEXT,
+
+ IMPL_NUM_IMPLEMENTATIONS
+};
+
+// ----------------------------------------------------------------------------
+
+// GL / EGL hooks
+
+#undef GL_ENTRY
+#undef EGL_ENTRY
+#define GL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__);
+#define EGL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__);
+
+struct gl_hooks_t {
+ struct gl_t {
+ #include "gl_entries.in"
+ } gl;
+ struct egl_t {
+ #include "egl_entries.in"
+ } egl;
+ struct gl_ext_t {
+ void (*extensions[MAX_NUMBER_OF_GL_EXTENSIONS])(void);
+ } ext;
+};
+#undef GL_ENTRY
+#undef EGL_ENTRY
+
+
+// ----------------------------------------------------------------------------
+
+extern gl_hooks_t gHooks[IMPL_NUM_IMPLEMENTATIONS];
+extern pthread_key_t gGLWrapperKey;
+
+#if USE_FAST_TLS_KEY
+
+// We have a dedicated TLS slot in bionic
+static inline gl_hooks_t const * volatile * get_tls_hooks() {
+ volatile void *tls_base = __get_tls();
+ gl_hooks_t const * volatile * tls_hooks =
+ reinterpret_cast<gl_hooks_t const * volatile *>(tls_base);
+ return tls_hooks;
+}
+
+static inline void setGlThreadSpecific(gl_hooks_t const *value) {
+ gl_hooks_t const * volatile * tls_hooks = get_tls_hooks();
+ tls_hooks[TLS_SLOT_OPENGL_API] = value;
+}
+
+static gl_hooks_t const* getGlThreadSpecific() {
+ gl_hooks_t const * volatile * tls_hooks = get_tls_hooks();
+ gl_hooks_t const* hooks = tls_hooks[TLS_SLOT_OPENGL_API];
+ if (hooks) return hooks;
+ return &gHooks[IMPL_NO_CONTEXT];
+}
+
+#else
+
+static inline void setGlThreadSpecific(gl_hooks_t const *value) {
+ pthread_setspecific(gGLWrapperKey, value);
+}
+
+static gl_hooks_t const* getGlThreadSpecific() {
+ gl_hooks_t const* hooks = static_cast<gl_hooks_t*>(pthread_getspecific(gGLWrapperKey));
+ if (hooks) return hooks;
+ return &gHooks[IMPL_NO_CONTEXT];
+}
+
+#endif
+
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+// ----------------------------------------------------------------------------
+
+#endif /* ANDROID_GLES_CM_HOOKS_H */