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      1 /*
      2  ** Copyright 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 
     17 #include "egl_tls.h"
     18 
     19 #include <stdlib.h>
     20 
     21 #include <cutils/properties.h>
     22 #include <log/log.h>
     23 #include "CallStack.h"
     24 
     25 namespace android {
     26 
     27 pthread_key_t egl_tls_t::sKey = TLS_KEY_NOT_INITIALIZED;
     28 pthread_once_t egl_tls_t::sOnceKey = PTHREAD_ONCE_INIT;
     29 
     30 egl_tls_t::egl_tls_t()
     31     : error(EGL_SUCCESS), ctx(0), logCallWithNoContext(true) {
     32 }
     33 
     34 const char *egl_tls_t::egl_strerror(EGLint err) {
     35     switch (err) {
     36         case EGL_SUCCESS:               return "EGL_SUCCESS";
     37         case EGL_NOT_INITIALIZED:       return "EGL_NOT_INITIALIZED";
     38         case EGL_BAD_ACCESS:            return "EGL_BAD_ACCESS";
     39         case EGL_BAD_ALLOC:             return "EGL_BAD_ALLOC";
     40         case EGL_BAD_ATTRIBUTE:         return "EGL_BAD_ATTRIBUTE";
     41         case EGL_BAD_CONFIG:            return "EGL_BAD_CONFIG";
     42         case EGL_BAD_CONTEXT:           return "EGL_BAD_CONTEXT";
     43         case EGL_BAD_CURRENT_SURFACE:   return "EGL_BAD_CURRENT_SURFACE";
     44         case EGL_BAD_DISPLAY:           return "EGL_BAD_DISPLAY";
     45         case EGL_BAD_MATCH:             return "EGL_BAD_MATCH";
     46         case EGL_BAD_NATIVE_PIXMAP:     return "EGL_BAD_NATIVE_PIXMAP";
     47         case EGL_BAD_NATIVE_WINDOW:     return "EGL_BAD_NATIVE_WINDOW";
     48         case EGL_BAD_PARAMETER:         return "EGL_BAD_PARAMETER";
     49         case EGL_BAD_SURFACE:           return "EGL_BAD_SURFACE";
     50         case EGL_CONTEXT_LOST:          return "EGL_CONTEXT_LOST";
     51         default: return "UNKNOWN";
     52     }
     53 }
     54 
     55 void egl_tls_t::validateTLSKey()
     56 {
     57     struct TlsKeyInitializer {
     58         static void create() {
     59             pthread_key_create(&sKey, (void (*)(void*))&eglReleaseThread);
     60         }
     61     };
     62     pthread_once(&sOnceKey, TlsKeyInitializer::create);
     63 }
     64 
     65 void egl_tls_t::setErrorEtcImpl(
     66         const char* caller, int line, EGLint error, bool quiet) {
     67     validateTLSKey();
     68     egl_tls_t* tls = getTLS();
     69     if (tls->error != error) {
     70         if (!quiet) {
     71             ALOGE("%s:%d error %x (%s)",
     72                     caller, line, error, egl_strerror(error));
     73             char value[PROPERTY_VALUE_MAX];
     74             property_get("debug.egl.callstack", value, "0");
     75             if (atoi(value)) {
     76                 CallStack::log(LOG_TAG);
     77             }
     78         }
     79         tls->error = error;
     80     }
     81 }
     82 
     83 bool egl_tls_t::logNoContextCall() {
     84     egl_tls_t* tls = getTLS();
     85     if (tls->logCallWithNoContext) {
     86         tls->logCallWithNoContext = false;
     87         return true;
     88     }
     89     return false;
     90 
     91 }
     92 
     93 egl_tls_t* egl_tls_t::getTLS() {
     94     egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
     95     if (tls == 0) {
     96         tls = new egl_tls_t;
     97         pthread_setspecific(sKey, tls);
     98     }
     99     return tls;
    100 }
    101 
    102 void egl_tls_t::clearTLS() {
    103     if (sKey != TLS_KEY_NOT_INITIALIZED) {
    104         egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
    105         if (tls) {
    106             pthread_setspecific(sKey, 0);
    107             delete tls;
    108         }
    109     }
    110 }
    111 
    112 void egl_tls_t::clearError() {
    113     // This must clear the error from all the underlying EGL implementations as
    114     // well as the EGL wrapper layer.
    115     eglGetError();
    116 }
    117 
    118 EGLint egl_tls_t::getError() {
    119     if (sKey == TLS_KEY_NOT_INITIALIZED) {
    120         return EGL_SUCCESS;
    121     }
    122     egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
    123     if (!tls) {
    124         return EGL_SUCCESS;
    125     }
    126     EGLint error = tls->error;
    127     tls->error = EGL_SUCCESS;
    128     return error;
    129 }
    130 
    131 void egl_tls_t::setContext(EGLContext ctx) {
    132     validateTLSKey();
    133     getTLS()->ctx = ctx;
    134 }
    135 
    136 EGLContext egl_tls_t::getContext() {
    137     if (sKey == TLS_KEY_NOT_INITIALIZED) {
    138         return EGL_NO_CONTEXT;
    139     }
    140     egl_tls_t* tls = (egl_tls_t *)pthread_getspecific(sKey);
    141     if (!tls) return EGL_NO_CONTEXT;
    142     return tls->ctx;
    143 }
    144 
    145 
    146 } // namespace android
    147