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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 <stdlib.h>
     18 #include <pthread.h>
     19 
     20 #include <cutils/log.h>
     21 #include <cutils/properties.h>
     22 
     23 #include <utils/CallStack.h>
     24 
     25 #include <EGL/egl.h>
     26 
     27 #include "egl_tls.h"
     28 
     29 
     30 namespace android {
     31 
     32 pthread_key_t egl_tls_t::sKey = TLS_KEY_NOT_INITIALIZED;
     33 pthread_once_t egl_tls_t::sOnceKey = PTHREAD_ONCE_INIT;
     34 
     35 egl_tls_t::egl_tls_t()
     36     : error(EGL_SUCCESS), ctx(0), logCallWithNoContext(EGL_TRUE) {
     37 }
     38 
     39 const char *egl_tls_t::egl_strerror(EGLint err) {
     40     switch (err) {
     41         case EGL_SUCCESS:               return "EGL_SUCCESS";
     42         case EGL_NOT_INITIALIZED:       return "EGL_NOT_INITIALIZED";
     43         case EGL_BAD_ACCESS:            return "EGL_BAD_ACCESS";
     44         case EGL_BAD_ALLOC:             return "EGL_BAD_ALLOC";
     45         case EGL_BAD_ATTRIBUTE:         return "EGL_BAD_ATTRIBUTE";
     46         case EGL_BAD_CONFIG:            return "EGL_BAD_CONFIG";
     47         case EGL_BAD_CONTEXT:           return "EGL_BAD_CONTEXT";
     48         case EGL_BAD_CURRENT_SURFACE:   return "EGL_BAD_CURRENT_SURFACE";
     49         case EGL_BAD_DISPLAY:           return "EGL_BAD_DISPLAY";
     50         case EGL_BAD_MATCH:             return "EGL_BAD_MATCH";
     51         case EGL_BAD_NATIVE_PIXMAP:     return "EGL_BAD_NATIVE_PIXMAP";
     52         case EGL_BAD_NATIVE_WINDOW:     return "EGL_BAD_NATIVE_WINDOW";
     53         case EGL_BAD_PARAMETER:         return "EGL_BAD_PARAMETER";
     54         case EGL_BAD_SURFACE:           return "EGL_BAD_SURFACE";
     55         case EGL_CONTEXT_LOST:          return "EGL_CONTEXT_LOST";
     56         default: return "UNKNOWN";
     57     }
     58 }
     59 
     60 void egl_tls_t::validateTLSKey()
     61 {
     62     struct TlsKeyInitializer {
     63         static void create() {
     64             pthread_key_create(&sKey, (void (*)(void*))&eglReleaseThread);
     65         }
     66     };
     67     pthread_once(&sOnceKey, TlsKeyInitializer::create);
     68 }
     69 
     70 void egl_tls_t::setErrorEtcImpl(
     71         const char* caller, int line, EGLint error, bool quiet) {
     72     validateTLSKey();
     73     egl_tls_t* tls = getTLS();
     74     if (tls->error != error) {
     75         if (!quiet) {
     76             ALOGE("%s:%d error %x (%s)",
     77                     caller, line, error, egl_strerror(error));
     78             char value[PROPERTY_VALUE_MAX];
     79             property_get("debug.egl.callstack", value, "0");
     80             if (atoi(value)) {
     81                 CallStack stack(LOG_TAG);
     82             }
     83         }
     84         tls->error = error;
     85     }
     86 }
     87 
     88 bool egl_tls_t::logNoContextCall() {
     89     egl_tls_t* tls = getTLS();
     90     if (tls->logCallWithNoContext == true) {
     91         tls->logCallWithNoContext = false;
     92         return true;
     93     }
     94     return false;
     95 }
     96 
     97 egl_tls_t* egl_tls_t::getTLS() {
     98     egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
     99     if (tls == 0) {
    100         tls = new egl_tls_t;
    101         pthread_setspecific(sKey, tls);
    102     }
    103     return tls;
    104 }
    105 
    106 void egl_tls_t::clearTLS() {
    107     if (sKey != TLS_KEY_NOT_INITIALIZED) {
    108         egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
    109         if (tls) {
    110             pthread_setspecific(sKey, 0);
    111             delete tls;
    112         }
    113     }
    114 }
    115 
    116 void egl_tls_t::clearError() {
    117     // This must clear the error from all the underlying EGL implementations as
    118     // well as the EGL wrapper layer.
    119     eglGetError();
    120 }
    121 
    122 EGLint egl_tls_t::getError() {
    123     if (sKey == TLS_KEY_NOT_INITIALIZED) {
    124         return EGL_SUCCESS;
    125     }
    126     egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
    127     if (!tls) {
    128         return EGL_SUCCESS;
    129     }
    130     EGLint error = tls->error;
    131     tls->error = EGL_SUCCESS;
    132     return error;
    133 }
    134 
    135 void egl_tls_t::setContext(EGLContext ctx) {
    136     validateTLSKey();
    137     getTLS()->ctx = ctx;
    138 }
    139 
    140 EGLContext egl_tls_t::getContext() {
    141     if (sKey == TLS_KEY_NOT_INITIALIZED) {
    142         return EGL_NO_CONTEXT;
    143     }
    144     egl_tls_t* tls = (egl_tls_t *)pthread_getspecific(sKey);
    145     if (!tls) return EGL_NO_CONTEXT;
    146     return tls->ctx;
    147 }
    148 
    149 
    150 } // namespace android
    151