transmission/libtransmission/log.cc

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/*
* This file Copyright (C) 2010-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <errno.h>
#include <stdio.h>
#include <event2/buffer.h>
#include "transmission.h"
#include "file.h"
#include "log.h"
#include "platform.h" /* tr_lock */
#include "tr-assert.h"
#include "utils.h"
tr_log_level __tr_message_level = TR_LOG_ERROR;
static bool myQueueEnabled = false;
static tr_log_message* myQueue = NULL;
static tr_log_message** myQueueTail = &myQueue;
static int myQueueLength = 0;
#ifndef _WIN32
/* make null versions of these win32 functions */
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static inline bool IsDebuggerPresent(void)
{
return false;
}
#endif
/***
****
***/
tr_log_level tr_logGetLevel(void)
{
return __tr_message_level;
}
/***
****
***/
static tr_lock* getMessageLock(void)
{
static tr_lock* l = NULL;
if (l == NULL)
{
l = tr_lockNew();
}
return l;
}
tr_sys_file_t tr_logGetFile(void)
{
static bool initialized = false;
static tr_sys_file_t file = TR_BAD_SYS_FILE;
if (!initialized)
{
int const fd = tr_env_get_int("TR_DEBUG_FD", 0);
switch (fd)
{
case 1:
file = tr_sys_file_get_std(TR_STD_SYS_FILE_OUT, NULL);
break;
case 2:
file = tr_sys_file_get_std(TR_STD_SYS_FILE_ERR, NULL);
break;
}
initialized = true;
}
return file;
}
void tr_logSetLevel(tr_log_level level)
{
__tr_message_level = level;
}
void tr_logSetQueueEnabled(bool isEnabled)
{
myQueueEnabled = isEnabled;
}
bool tr_logGetQueueEnabled(void)
{
return myQueueEnabled;
}
tr_log_message* tr_logGetQueue(void)
{
tr_log_message* ret;
tr_lockLock(getMessageLock());
ret = myQueue;
myQueue = NULL;
myQueueTail = &myQueue;
myQueueLength = 0;
tr_lockUnlock(getMessageLock());
return ret;
}
void tr_logFreeQueue(tr_log_message* list)
{
tr_log_message* next;
while (list != NULL)
{
next = list->next;
tr_free(list->message);
tr_free(list->name);
tr_free(list);
list = next;
}
}
/**
***
**/
char* tr_logGetTimeStr(char* buf, size_t buflen)
{
struct timeval tv;
tr_gettimeofday(&tv);
time_t const seconds = tv.tv_sec;
int const milliseconds = (int)(tv.tv_usec / 1000);
char msec_str[8];
tr_snprintf(msec_str, sizeof msec_str, "%03d", milliseconds);
struct tm now_tm;
tr_localtime_r(&seconds, &now_tm);
char date_str[32];
strftime(date_str, sizeof(date_str), "%Y-%m-%d %H:%M:%S", &now_tm);
tr_snprintf(buf, buflen, "%s.%s", date_str, msec_str);
return buf;
}
bool tr_logGetDeepEnabled(void)
{
static int8_t deepLoggingIsActive = -1;
if (deepLoggingIsActive < 0)
{
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deepLoggingIsActive = (int8_t)(IsDebuggerPresent() || tr_logGetFile() != TR_BAD_SYS_FILE);
}
return deepLoggingIsActive != 0;
}
void tr_logAddDeep(char const* file, int line, char const* name, char const* fmt, ...)
{
tr_sys_file_t const fp = tr_logGetFile();
if (fp != TR_BAD_SYS_FILE || IsDebuggerPresent())
{
struct evbuffer* buf = evbuffer_new();
char* base = tr_sys_path_basename(file, NULL);
char timestr[64];
evbuffer_add_printf(buf, "[%s] ", tr_logGetTimeStr(timestr, sizeof(timestr)));
if (name != NULL)
{
evbuffer_add_printf(buf, "%s ", name);
}
va_list args;
va_start(args, fmt);
evbuffer_add_vprintf(buf, fmt, args);
va_end(args);
evbuffer_add_printf(buf, " (%s:%d)" TR_NATIVE_EOL_STR, base, line);
size_t message_len = 0;
char* const message = evbuffer_free_to_str(buf, &message_len);
#ifdef _WIN32
OutputDebugStringA(message);
#endif
if (fp != TR_BAD_SYS_FILE)
{
tr_sys_file_write(fp, message, message_len, NULL, NULL);
}
tr_free(message);
tr_free(base);
}
}
/***
****
***/
void tr_logAddMessage(char const* file, int line, tr_log_level level, char const* name, char const* fmt, ...)
{
int const err = errno; /* message logging shouldn't affect errno */
char buf[1024];
int buf_len;
va_list ap;
tr_lockLock(getMessageLock());
/* build the text message */
*buf = '\0';
va_start(ap, fmt);
buf_len = evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
if (buf_len < 0)
{
goto FINISH;
}
#ifdef _WIN32
if ((size_t)buf_len < sizeof(buf) - 3)
{
buf[buf_len + 0] = '\r';
buf[buf_len + 1] = '\n';
buf[buf_len + 2] = '\0';
OutputDebugStringA(buf);
buf[buf_len + 0] = '\0';
}
else
{
OutputDebugStringA(buf);
}
#endif
if (!tr_str_is_empty(buf))
{
if (tr_logGetQueueEnabled())
{
tr_log_message* newmsg;
newmsg = tr_new0(tr_log_message, 1);
newmsg->level = level;
newmsg->when = tr_time();
newmsg->message = tr_strdup(buf);
newmsg->file = file;
newmsg->line = line;
newmsg->name = tr_strdup(name);
*myQueueTail = newmsg;
myQueueTail = &newmsg->next;
++myQueueLength;
if (myQueueLength > TR_LOG_MAX_QUEUE_LENGTH)
{
tr_log_message* old = myQueue;
myQueue = old->next;
old->next = NULL;
tr_logFreeQueue(old);
--myQueueLength;
TR_ASSERT(myQueueLength == TR_LOG_MAX_QUEUE_LENGTH);
}
}
else
{
tr_sys_file_t fp;
char timestr[64];
fp = tr_logGetFile();
if (fp == TR_BAD_SYS_FILE)
{
fp = tr_sys_file_get_std(TR_STD_SYS_FILE_ERR, NULL);
}
tr_logGetTimeStr(timestr, sizeof(timestr));
if (name != NULL)
{
tr_sys_file_write_fmt(fp, "[%s] %s: %s" TR_NATIVE_EOL_STR, NULL, timestr, name, buf);
}
else
{
tr_sys_file_write_fmt(fp, "[%s] %s" TR_NATIVE_EOL_STR, NULL, timestr, buf);
}
tr_sys_file_flush(fp, NULL);
}
}
FINISH:
tr_lockUnlock(getMessageLock());
errno = err;
}