From f1c5cab5525dfcb8edffa275e7c8c3e753c7536f Mon Sep 17 00:00:00 2001 From: Chia-I Wu Date: Tue, 29 Sep 2009 16:11:06 +0800 Subject: [PATCH] egl: Improve logging facility. Add _eglSetLogger and _eglSetLogLevel to allow drivers to change the message logger or report level. Signed-off-by: Chia-I Wu --- src/egl/main/eglglobals.c | 7 +- src/egl/main/egllog.c | 181 +++++++++++++++++++++++++++----------- src/egl/main/egllog.h | 11 +++ 3 files changed, 145 insertions(+), 54 deletions(-) diff --git a/src/egl/main/eglglobals.c b/src/egl/main/eglglobals.c index 30d9fe97b4e..443d0f072cf 100644 --- a/src/egl/main/eglglobals.c +++ b/src/egl/main/eglglobals.c @@ -18,9 +18,10 @@ struct _egl_global _eglGlobal = 0, /* NumDrivers */ { NULL }, /* Drivers */ 2, /* NumAtExitCalls */ - { /* AtExitCalls */ - _eglFiniDisplay, - _eglUnloadDrivers + { + /* default AtExitCalls, called in reverse order */ + _eglUnloadDrivers, /* always called last */ + _eglFiniDisplay }, }; diff --git a/src/egl/main/egllog.c b/src/egl/main/egllog.c index 23eb523eebe..11a9bf7275c 100644 --- a/src/egl/main/egllog.c +++ b/src/egl/main/egllog.c @@ -9,47 +9,140 @@ #include #include #include + #include "egllog.h" +#include "eglmutex.h" #define MAXSTRING 1000 -#define FALLBACK_LOG_LEVEL _EGL_WARNING -#define FALLBACK_LOG_LEVEL_STR "warning" +#define FALLBACK_LOG_LEVEL _EGL_WARNING -static EGLint ReportingLevel = -1; +static struct { + _EGLMutex mutex; -static void -log_level_initialize(void) + EGLBoolean initialized; + EGLint level; + _EGLLogProc logger; + EGLint num_messages; +} logging = { + _EGL_MUTEX_INITIALIZER, + EGL_FALSE, + FALLBACK_LOG_LEVEL, + NULL, + 0 +}; + +static const char *level_strings[] = { + /* the order is important */ + "fatal", + "warning", + "info", + "debug", + NULL +}; + + +/** + * Set the function to be called when there is a message to log. + * Note that the function will be called with an internal lock held. + * Recursive logging is not allowed. + */ +void +_eglSetLogProc(_EGLLogProc logger) { - char *log_env = getenv("EGL_LOG_LEVEL"); + EGLint num_messages = 0; - if (log_env == NULL) { - ReportingLevel = FALLBACK_LOG_LEVEL; - } - else if (strcasecmp(log_env, "fatal") == 0) { - ReportingLevel = _EGL_FATAL; - } - else if (strcasecmp(log_env, "warning") == 0) { - ReportingLevel = _EGL_WARNING; + _eglLockMutex(&logging.mutex); + + if (logging.logger != logger) { + logging.logger = logger; + + num_messages = logging.num_messages; + logging.num_messages = 0; } - else if (strcasecmp(log_env, "info") == 0) { - ReportingLevel = _EGL_INFO; + + _eglUnlockMutex(&logging.mutex); + + if (num_messages) + _eglLog(_EGL_DEBUG, + "New logger installed. " + "Messages before the new logger might not be available."); +} + + +/** + * Set the log reporting level. + */ +void +_eglSetLogLevel(EGLint level) +{ + switch (level) { + case _EGL_FATAL: + case _EGL_WARNING: + case _EGL_INFO: + case _EGL_DEBUG: + _eglLockMutex(&logging.mutex); + logging.level = level; + _eglUnlockMutex(&logging.mutex); + break; + default: + break; } - else if (strcasecmp(log_env, "debug") == 0) { - ReportingLevel = _EGL_DEBUG; +} + + +/** + * The default logger. It prints the message to stderr. + */ +static void +_eglDefaultLogger(EGLint level, const char *msg) +{ + fprintf(stderr, "libEGL %s: %s\n", level_strings[level], msg); +} + + +/** + * Initialize the logging facility. + */ +static void +_eglInitLogger(void) +{ + const char *log_env; + EGLint i, level = -1; + + if (logging.initialized) + return; + + log_env = getenv("EGL_LOG_LEVEL"); + if (log_env) { + for (i = 0; level_strings[i]; i++) { + if (strcasecmp(log_env, level_strings[i]) == 0) { + level = i; + break; + } + } } else { - fprintf(stderr, "Unrecognized EGL_LOG_LEVEL environment variable value. " + level = FALLBACK_LOG_LEVEL; + } + + logging.logger = _eglDefaultLogger; + logging.level = (level >= 0) ? level : FALLBACK_LOG_LEVEL; + logging.initialized = EGL_TRUE; + + /* it is fine to call _eglLog now */ + if (log_env && level < 0) { + _eglLog(_EGL_WARNING, + "Unrecognized EGL_LOG_LEVEL environment variable value. " "Expected one of \"fatal\", \"warning\", \"info\", \"debug\". " - "Got \"%s\". Falling back to \"%s\".\n", - log_env, FALLBACK_LOG_LEVEL_STR); - ReportingLevel = FALLBACK_LOG_LEVEL; + "Got \"%s\". Falling back to \"%s\".", + log_env, level_strings[FALLBACK_LOG_LEVEL]); } } /** - * Log a message to stderr. + * Log a message with message logger. * \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG. */ void @@ -57,40 +150,26 @@ _eglLog(EGLint level, const char *fmtStr, ...) { va_list args; char msg[MAXSTRING]; - const char *levelStr; - static int log_level_initialized = 0; - if (!log_level_initialized) { - log_level_initialize(); - log_level_initialized = 1; - } + /* one-time initialization; a little race here is fine */ + if (!logging.initialized) + _eglInitLogger(); + if (level > logging.level || level < 0) + return; - if (level <= ReportingLevel) { - switch (level) { - case _EGL_FATAL: - levelStr = "Fatal"; - break; - case _EGL_WARNING: - levelStr = "Warning"; - break; - case _EGL_INFO: - levelStr = "Info"; - break; - case _EGL_DEBUG: - levelStr = "Debug"; - break; - default: - levelStr = ""; - } + _eglLockMutex(&logging.mutex); + if (logging.logger) { va_start(args, fmtStr); vsnprintf(msg, MAXSTRING, fmtStr, args); va_end(args); - fprintf(stderr, "libEGL %s: %s\n", levelStr, msg); - - if (level == _EGL_FATAL) { - exit(1); /* or abort()? */ - } + logging.logger(level, msg); + logging.num_messages++; } + + _eglUnlockMutex(&logging.mutex); + + if (level == _EGL_FATAL) + exit(1); /* or abort()? */ } diff --git a/src/egl/main/egllog.h b/src/egl/main/egllog.h index 2fa352f155d..83c8bb72a6e 100644 --- a/src/egl/main/egllog.h +++ b/src/egl/main/egllog.h @@ -9,6 +9,17 @@ #define _EGL_DEBUG 3 /* useful info for debugging */ +typedef void (*_EGLLogProc)(EGLint level, const char *msg); + + +extern void +_eglSetLogProc(_EGLLogProc logger); + + +extern void +_eglSetLogLevel(EGLint level); + + extern void _eglLog(EGLint level, const char *fmtStr, ...); -- 2.30.2