210 lines
4.9 KiB
C
210 lines
4.9 KiB
C
/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
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* Copyright 2010 LunarG, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* Logging facility for debug/info messages.
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* _EGL_FATAL messages are printed to stderr
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* The EGL_LOG_LEVEL var controls the output of other warning/info/debug msgs.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include "c11/threads.h"
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#include "egllog.h"
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#define MAXSTRING 1000
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#define FALLBACK_LOG_LEVEL _EGL_WARNING
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static struct {
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mtx_t mutex;
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EGLBoolean initialized;
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EGLint level;
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_EGLLogProc logger;
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EGLint num_messages;
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} logging = {
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_MTX_INITIALIZER_NP,
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EGL_FALSE,
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FALLBACK_LOG_LEVEL,
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NULL,
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0
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};
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static const char *level_strings[] = {
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/* the order is important */
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"fatal",
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"warning",
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"info",
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"debug",
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NULL
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};
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/**
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* Set the function to be called when there is a message to log.
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* Note that the function will be called with an internal lock held.
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* Recursive logging is not allowed.
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*/
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void
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_eglSetLogProc(_EGLLogProc logger)
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{
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EGLint num_messages = 0;
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mtx_lock(&logging.mutex);
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if (logging.logger != logger) {
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logging.logger = logger;
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num_messages = logging.num_messages;
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logging.num_messages = 0;
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}
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mtx_unlock(&logging.mutex);
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if (num_messages)
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_eglLog(_EGL_DEBUG,
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"New logger installed. "
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"Messages before the new logger might not be available.");
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}
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/**
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* Set the log reporting level.
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*/
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void
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_eglSetLogLevel(EGLint level)
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{
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switch (level) {
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case _EGL_FATAL:
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case _EGL_WARNING:
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case _EGL_INFO:
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case _EGL_DEBUG:
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mtx_lock(&logging.mutex);
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logging.level = level;
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mtx_unlock(&logging.mutex);
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break;
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default:
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break;
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}
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}
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/**
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* The default logger. It prints the message to stderr.
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*/
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static void
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_eglDefaultLogger(EGLint level, const char *msg)
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{
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fprintf(stderr, "libEGL %s: %s\n", level_strings[level], msg);
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}
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/**
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* Initialize the logging facility.
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*/
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static void
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_eglInitLogger(void)
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{
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const char *log_env;
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EGLint i, level = -1;
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if (logging.initialized)
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return;
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log_env = getenv("EGL_LOG_LEVEL");
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if (log_env) {
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for (i = 0; level_strings[i]; i++) {
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if (strcasecmp(log_env, level_strings[i]) == 0) {
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level = i;
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break;
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}
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}
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}
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else {
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level = FALLBACK_LOG_LEVEL;
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}
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logging.logger = _eglDefaultLogger;
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logging.level = (level >= 0) ? level : FALLBACK_LOG_LEVEL;
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logging.initialized = EGL_TRUE;
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/* it is fine to call _eglLog now */
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if (log_env && level < 0) {
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_eglLog(_EGL_WARNING,
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"Unrecognized EGL_LOG_LEVEL environment variable value. "
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"Expected one of \"fatal\", \"warning\", \"info\", \"debug\". "
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"Got \"%s\". Falling back to \"%s\".",
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log_env, level_strings[FALLBACK_LOG_LEVEL]);
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}
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}
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/**
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* Log a message with message logger.
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* \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG.
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*/
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void
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_eglLog(EGLint level, const char *fmtStr, ...)
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{
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va_list args;
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char msg[MAXSTRING];
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int ret;
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/* one-time initialization; a little race here is fine */
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if (!logging.initialized)
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_eglInitLogger();
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if (level > logging.level || level < 0)
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return;
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mtx_lock(&logging.mutex);
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if (logging.logger) {
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va_start(args, fmtStr);
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ret = vsnprintf(msg, MAXSTRING, fmtStr, args);
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if (ret < 0 || ret >= MAXSTRING)
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strcpy(msg, "<message truncated>");
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va_end(args);
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logging.logger(level, msg);
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logging.num_messages++;
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}
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mtx_unlock(&logging.mutex);
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if (level == _EGL_FATAL)
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exit(1); /* or abort()? */
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}
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