egl_tls.cpp revision cab25d680e644d962041d05a319e485b96136a5d 
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
30namespace android {
31
32pthread_key_t egl_tls_t::sKey = -1;
33pthread_mutex_t egl_tls_t::sLockKey = PTHREAD_MUTEX_INITIALIZER;
34
35egl_tls_t::egl_tls_t()
36    : error(EGL_SUCCESS), ctx(0), logCallWithNoContext(EGL_TRUE) {
37}
38
39const 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
60void 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
70void 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
88bool 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
97egl_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
106void egl_tls_t::clearTLS() {
107    if (sKey != -1) {
108        egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
109        if (tls) {
110            delete tls;
111            pthread_setspecific(sKey, 0);
112        }
113    }
114}
115
116void 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
122EGLint egl_tls_t::getError() {
123    if (sKey == -1)
124        return EGL_SUCCESS;
125    egl_tls_t* tls = (egl_tls_t*)pthread_getspecific(sKey);
126    if (!tls) return EGL_SUCCESS;
127    EGLint error = tls->error;
128    tls->error = EGL_SUCCESS;
129    return error;
130}
131
132void egl_tls_t::setContext(EGLContext ctx) {
133    validateTLSKey();
134    getTLS()->ctx = ctx;
135}
136
137EGLContext egl_tls_t::getContext() {
138    if (sKey == -1)
139        return EGL_NO_CONTEXT;
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