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      1 /*
      2 * Copyright (C) 2011 The Android Open Source Project
      3 *
      4 * Licensed under the Apache License, Version 2.0 (the "License");
      5 * you may not use this file except in compliance with the License.
      6 * You may obtain a copy of the License at
      7 *
      8 * http://www.apache.org/licenses/LICENSE-2.0
      9 *
     10 * Unless required by applicable law or agreed to in writing, software
     11 * distributed under the License is distributed on an "AS IS" BASIS,
     12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 * See the License for the specific language governing permissions and
     14 * limitations under the License.
     15 */
     16 #ifndef _THREAD_INFO_H
     17 #define _THREAD_INFO_H
     18 
     19 #include "HostConnection.h"
     20 #include <pthread.h>
     21 #ifdef HAVE_ANDROID_OS
     22 #include <bionic_tls.h>
     23 #endif
     24 
     25 struct EGLContext_t;
     26 
     27 struct EGLThreadInfo
     28 {
     29     EGLThreadInfo() : currentContext(NULL), hostConn(NULL), eglError(EGL_SUCCESS) {}
     30 
     31     EGLContext_t *currentContext;
     32     HostConnection *hostConn;
     33     int           eglError;
     34 };
     35 
     36 
     37 EGLThreadInfo *slow_getEGLThreadInfo();
     38 
     39 #ifdef HAVE_ANDROID_OS
     40     // We have a dedicated TLS slot in bionic
     41     inline EGLThreadInfo* getEGLThreadInfo() {
     42         EGLThreadInfo *tInfo =
     43              (EGLThreadInfo *)(((uintptr_t *)__get_tls())[TLS_SLOT_OPENGL]);
     44         if (!tInfo) {
     45             tInfo = slow_getEGLThreadInfo();
     46             ((uintptr_t *)__get_tls())[TLS_SLOT_OPENGL] = (uintptr_t)tInfo;
     47         }
     48         return tInfo;
     49     }
     50 #else
     51     inline EGLThreadInfo* getEGLThreadInfo() {
     52         return slow_getEGLThreadInfo();
     53     }
     54 #endif
     55 
     56 
     57 
     58 
     59 #endif // of _THREAD_INFO_H
     60