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mirror of https://gitlab.xiph.org/xiph/icecast-common.git synced 2024-12-04 14:46:31 -05:00
icecast-common/log/log.c
Michael Smith c0c636413f Open logs in line-buffered mode, so that logging is actually useful.
svn path=/trunk/log/; revision=2075
2001-09-23 10:07:06 +00:00

238 lines
4.1 KiB
C

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#ifndef _WIN32
#include <pthread.h>
#else
#include <windows.h>
#endif
#include "log.h"
#define LOG_MAXLOGS 25
#define LOG_MAXLINELEN 1024
#ifdef _WIN32
#define mutex_t CRITICAL_SECTION
#else
#define mutex_t pthread_mutex_t
#endif
static mutex_t _logger_mutex;
static int _initialized = 0;
typedef struct log_tag
{
int in_use;
int level;
char *filename;
FILE *logfile;
char *buffer;
} log_t;
log_t loglist[LOG_MAXLOGS];
int _get_log_id();
void _release_log_id(int log_id);
static void _lock_logger();
static void _unlock_logger();
void log_initialize()
{
int i;
if (_initialized) return;
for (i = 0; i < LOG_MAXLOGS; i++) {
loglist[i].in_use = 0;
loglist[i].level = 2;
loglist[i].filename = NULL;
loglist[i].logfile = NULL;
loglist[i].buffer = NULL;
}
/* initialize mutexes */
#ifndef _WIN32
pthread_mutex_init(&_logger_mutex, NULL);
#else
InitializeCriticalSection(&_logger_mutex);
#endif
_initialized = 1;
}
int log_open(const char *filename)
{
int log_id;
if (filename == NULL) return LOG_EINSANE;
if (strcmp(filename, "") == 0) return LOG_EINSANE;
log_id = _get_log_id();
if (log_id < 0) return LOG_ENOMORELOGS;
loglist[log_id].logfile = fopen(filename, "a");
if (loglist[log_id].logfile != NULL) {
loglist[log_id].filename = (char *)strdup(filename);
} else {
_release_log_id(log_id);
return LOG_ECANTOPEN;
}
setvbuf(loglist[log_id].logfile, NULL, _IOLBF, 0);
return log_id;
}
int log_open_with_buffer(const char *filename, int size)
{
/* not implemented */
return 0;
}
void log_set_level(int log_id, int level)
{
if (log_id < 0 || log_id >= LOG_MAXLOGS) return;
if (loglist[log_id].in_use == 0) return;
loglist[log_id].level = level;
}
void log_flush(int log_id)
{
if (log_id < 0 || log_id >= LOG_MAXLOGS) return;
if (loglist[log_id].in_use == 0) return;
fflush(loglist[log_id].logfile);
}
void log_reopen(int log_id)
{
/* not implemented yet */
}
void log_close(int log_id)
{
if (log_id < 0 || log_id >= LOG_MAXLOGS) return;
if (loglist[log_id].in_use == 0) return;
loglist[log_id].in_use = 0;
loglist[log_id].level = 2;
if (loglist[log_id].filename) free(loglist[log_id].filename);
if (loglist[log_id].buffer) free(loglist[log_id].buffer);
fclose(loglist[log_id].logfile);
loglist[log_id].logfile = NULL;
}
void log_shutdown()
{
/* destroy mutexes */
#ifndef _WIN32
pthread_mutex_destroy(&_logger_mutex);
#else
DeleteCriticalSection(&_logger_mutex);
#endif
_initialized = 0;
}
void log_write(int log_id, int priority, const char *cat, const char *fmt, ...)
{
static char prior[4][5] = { "EROR\0", "WARN\0", "INFO\0", "DBUG\0" };
char tyme[128];
char pre[256];
char line[LOG_MAXLINELEN];
time_t now;
va_list ap;
if (log_id < 0) return;
if (loglist[log_id].level < priority) return;
va_start(ap, fmt);
vsnprintf(line, LOG_MAXLINELEN, fmt, ap);
now = time(NULL);
strftime(tyme, 128, "[%Y-%m-%d %H:%M:%S]", gmtime(&now));
snprintf(pre, 256, "%s %s", prior[priority-1], cat);
fprintf(loglist[log_id].logfile, "%s %s %s\n", tyme, pre, line);
va_end(ap);
}
void log_write_direct(int log_id, const char *fmt, ...)
{
char line[LOG_MAXLINELEN];
va_list ap;
if (log_id < 0) return;
va_start(ap, fmt);
vsnprintf(line, LOG_MAXLINELEN, fmt, ap);
fprintf(loglist[log_id].logfile, "%s\n", line);
va_end(ap);
fflush(loglist[log_id].logfile);
}
int _get_log_id()
{
int i;
int id = -1;
/* lock mutex */
_lock_logger();
for (i = 0; i < LOG_MAXLOGS; i++)
if (loglist[i].in_use == 0) {
loglist[i].in_use = 1;
id = i;
break;
}
/* unlock mutex */
_unlock_logger();
return id;
}
void _release_log_id(int log_id)
{
/* lock mutex */
_lock_logger();
loglist[log_id].in_use = 0;
/* unlock mutex */
_unlock_logger();
}
static void _lock_logger()
{
#ifndef _WIN32
pthread_mutex_lock(&_logger_mutex);
#else
EnterCriticalSection(&_logger_mutex);
#endif
}
static void _unlock_logger()
{
#ifndef _WIN32
pthread_mutex_unlock(&_logger_mutex);
#else
LeaveCriticalSection(&_logger_mutex);
#endif
}