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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 = -1;
     33 pthread_mutex_t egl_tls_t::sLockKey = PTHREAD_MUTEX_INITIALIZER;
     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     if (sKey == -1) {
     63         pthread_mutex_lock(&sLockKey);
     64         if (sKey == -1)
     65             pthread_key_create(&sKey, NULL);
     66         pthread_mutex_unlock(&sLockKey);
     67     }
     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;
     82                 stack.update();
     83                 stack.dump();
     84             }
     85         }
     86         tls->error = error;
     87     }
     88 }
     89 
     90 bool egl_tls_t::logNoContextCall() {
     91     egl_tls_t* tls = getTLS();
     92     if (tls->logCallWithNoContext == true) {
     93         tls->logCallWithNoContext = false;
     94         return true;
     95     }
     96     return false;
     97 }
     98 
     99 egl_tls_t* egl_tls_t::getTLS() {
    100     egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
    101     if (tls == 0) {
    102         tls = new egl_tls_t;
    103         pthread_setspecific(sKey, tls);
    104     }
    105     return tls;
    106 }
    107 
    108 void egl_tls_t::clearTLS() {
    109     if (sKey != -1) {
    110         egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
    111         if (tls) {
    112             delete tls;
    113             pthread_setspecific(sKey, 0);
    114         }
    115     }
    116 }
    117 
    118 void egl_tls_t::clearError() {
    119     // This must clear the error from all the underlying EGL implementations as
    120     // well as the EGL wrapper layer.
    121     eglGetError();
    122 }
    123 
    124 EGLint egl_tls_t::getError() {
    125     if (sKey == -1)
    126         return EGL_SUCCESS;
    127     egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
    128     if (!tls) return EGL_SUCCESS;
    129     EGLint error = tls->error;
    130     tls->error = EGL_SUCCESS;
    131     return error;
    132 }
    133 
    134 void egl_tls_t::setContext(EGLContext ctx) {
    135     validateTLSKey();
    136     getTLS()->ctx = ctx;
    137 }
    138 
    139 EGLContext egl_tls_t::getContext() {
    140     if (sKey == -1)
    141         return EGL_NO_CONTEXT;
    142     egl_tls_t* tls = (egl_tls_t *)pthread_getspecific(sKey);
    143     if (!tls) return EGL_NO_CONTEXT;
    144     return tls->ctx;
    145 }
    146 
    147 
    148 } // namespace android
    149