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| 5564 | serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2008 VMware, Inc. |
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| 4 | * Copyright 2009-2010 Chia-I Wu |
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| 5 | * Copyright 2010 LunarG, Inc. |
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| 6 | * All Rights Reserved. |
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| 7 | * |
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| 8 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 9 | * copy of this software and associated documentation files (the |
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| 10 | * "Software"), to deal in the Software without restriction, including |
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| 11 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 12 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 13 | * permit persons to whom the Software is furnished to do so, subject to |
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| 14 | * the following conditions: |
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| 15 | * |
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| 16 | * The above copyright notice and this permission notice (including the |
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| 17 | * next paragraph) shall be included in all copies or substantial portions |
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| 18 | * of the Software. |
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| 19 | * |
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| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 23 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 25 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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| 26 | * DEALINGS IN THE SOFTWARE. |
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| 27 | * |
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| 28 | **************************************************************************/ |
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| 29 | |||
| 30 | |||
| 31 | /** |
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| 32 | * Logging facility for debug/info messages. |
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| 33 | * _EGL_FATAL messages are printed to stderr |
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| 34 | * The EGL_LOG_LEVEL var controls the output of other warning/info/debug msgs. |
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| 35 | */ |
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| 36 | |||
| 37 | |||
| 38 | #include |
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| 39 | #include |
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| 40 | #include |
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| 41 | #include "c11/threads.h" |
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| 42 | |||
| 43 | #include "egllog.h" |
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| 44 | #include "eglstring.h" |
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| 45 | |||
| 46 | #define MAXSTRING 1000 |
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| 47 | #define FALLBACK_LOG_LEVEL _EGL_WARNING |
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| 48 | |||
| 49 | |||
| 50 | static struct { |
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| 51 | mtx_t mutex; |
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| 52 | |||
| 53 | EGLBoolean initialized; |
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| 54 | EGLint level; |
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| 55 | _EGLLogProc logger; |
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| 56 | EGLint num_messages; |
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| 57 | } logging = { |
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| 58 | _MTX_INITIALIZER_NP, |
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| 59 | EGL_FALSE, |
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| 60 | FALLBACK_LOG_LEVEL, |
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| 61 | NULL, |
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| 62 | |||
| 63 | }; |
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| 64 | |||
| 65 | static const char *level_strings[] = { |
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| 66 | /* the order is important */ |
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| 67 | "fatal", |
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| 68 | "warning", |
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| 69 | "info", |
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| 70 | "debug", |
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| 71 | NULL |
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| 72 | }; |
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| 73 | |||
| 74 | |||
| 75 | /** |
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| 76 | * Set the function to be called when there is a message to log. |
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| 77 | * Note that the function will be called with an internal lock held. |
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| 78 | * Recursive logging is not allowed. |
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| 79 | */ |
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| 80 | void |
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| 81 | _eglSetLogProc(_EGLLogProc logger) |
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| 82 | { |
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| 83 | EGLint num_messages = 0; |
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| 84 | |||
| 85 | mtx_lock(&logging.mutex); |
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| 86 | |||
| 87 | if (logging.logger != logger) { |
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| 88 | logging.logger = logger; |
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| 89 | |||
| 90 | num_messages = logging.num_messages; |
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| 91 | logging.num_messages = 0; |
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| 92 | } |
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| 93 | |||
| 94 | mtx_unlock(&logging.mutex); |
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| 95 | |||
| 96 | if (num_messages) |
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| 97 | _eglLog(_EGL_DEBUG, |
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| 98 | "New logger installed. " |
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| 99 | "Messages before the new logger might not be available."); |
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| 100 | } |
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| 101 | |||
| 102 | |||
| 103 | /** |
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| 104 | * Set the log reporting level. |
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| 105 | */ |
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| 106 | void |
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| 107 | _eglSetLogLevel(EGLint level) |
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| 108 | { |
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| 109 | switch (level) { |
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| 110 | case _EGL_FATAL: |
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| 111 | case _EGL_WARNING: |
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| 112 | case _EGL_INFO: |
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| 113 | case _EGL_DEBUG: |
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| 114 | mtx_lock(&logging.mutex); |
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| 115 | logging.level = level; |
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| 116 | mtx_unlock(&logging.mutex); |
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| 117 | break; |
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| 118 | default: |
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| 119 | break; |
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| 120 | } |
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| 121 | } |
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| 122 | |||
| 123 | |||
| 124 | /** |
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| 125 | * The default logger. It prints the message to stderr. |
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| 126 | */ |
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| 127 | static void |
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| 128 | _eglDefaultLogger(EGLint level, const char *msg) |
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| 129 | { |
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| 130 | fprintf(stderr, "libEGL %s: %s\n", level_strings[level], msg); |
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| 131 | } |
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| 132 | |||
| 133 | |||
| 134 | /** |
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| 135 | * Initialize the logging facility. |
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| 136 | */ |
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| 137 | static void |
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| 138 | _eglInitLogger(void) |
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| 139 | { |
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| 140 | const char *log_env; |
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| 141 | EGLint i, level = -1; |
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| 142 | |||
| 143 | if (logging.initialized) |
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| 144 | return; |
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| 145 | |||
| 146 | log_env = getenv("EGL_LOG_LEVEL"); |
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| 147 | if (log_env) { |
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| 148 | for (i = 0; level_strings[i]; i++) { |
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| 149 | if (_eglstrcasecmp(log_env, level_strings[i]) == 0) { |
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| 150 | level = i; |
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| 151 | break; |
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| 152 | } |
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| 153 | } |
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| 154 | } |
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| 155 | else { |
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| 156 | level = FALLBACK_LOG_LEVEL; |
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| 157 | } |
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| 158 | |||
| 159 | logging.logger = _eglDefaultLogger; |
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| 160 | logging.level = (level >= 0) ? level : FALLBACK_LOG_LEVEL; |
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| 161 | logging.initialized = EGL_TRUE; |
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| 162 | |||
| 163 | /* it is fine to call _eglLog now */ |
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| 164 | if (log_env && level < 0) { |
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| 165 | _eglLog(_EGL_WARNING, |
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| 166 | "Unrecognized EGL_LOG_LEVEL environment variable value. " |
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| 167 | "Expected one of \"fatal\", \"warning\", \"info\", \"debug\". " |
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| 168 | "Got \"%s\". Falling back to \"%s\".", |
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| 169 | log_env, level_strings[FALLBACK_LOG_LEVEL]); |
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| 170 | } |
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| 171 | } |
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| 172 | |||
| 173 | |||
| 174 | /** |
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| 175 | * Log a message with message logger. |
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| 176 | * \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG. |
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| 177 | */ |
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| 178 | void |
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| 179 | _eglLog(EGLint level, const char *fmtStr, ...) |
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| 180 | { |
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| 181 | va_list args; |
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| 182 | char msg[MAXSTRING]; |
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| 183 | int ret; |
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| 184 | |||
| 185 | /* one-time initialization; a little race here is fine */ |
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| 186 | if (!logging.initialized) |
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| 187 | _eglInitLogger(); |
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| 188 | if (level > logging.level || level < 0) |
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| 189 | return; |
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| 190 | |||
| 191 | mtx_lock(&logging.mutex); |
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| 192 | |||
| 193 | if (logging.logger) { |
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| 194 | va_start(args, fmtStr); |
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| 195 | ret = vsnprintf(msg, MAXSTRING, fmtStr, args); |
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| 196 | if (ret < 0 || ret >= MAXSTRING) |
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| 197 | strcpy(msg, " |
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| 198 | va_end(args); |
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| 199 | |||
| 200 | logging.logger(level, msg); |
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| 201 | logging.num_messages++; |
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| 202 | } |
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| 203 | |||
| 204 | mtx_unlock(&logging.mutex); |
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| 205 | |||
| 206 | if (level == _EGL_FATAL) |
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| 207 | exit(1); /* or abort()? */ |
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| 208 | } |