I have got an MFC app comprised of one exe and two DLLs. The exe calls functions from those two DLLs. Now I am trying to add some logging by using the Pantheios logging lib.
What I want to achieve:
The exe and the two DLLs are all logging to the same log file in hard drive.
Here is what I have done:
1) Using implicit linking in main exe program:
#include "stdafx.h"
#include <pantheios/implicit_link/core.h>
#include <pantheios/implicit_link/fe.simple.h>
#include <pantheios/implicit_link/be.file.h>
#define USER_SPECIFIED_LEVEL
#ifndef USER_SPECIFIED_LEVEL
#include <pantheios/implicit_link/fe.simple.h>
#endif
#ifdef USER_SPECIFIED_LEVEL
PANTHEIOS_CALL(int) pantheios_fe_init(void* reserved,void** ptoken)
{
*ptoken = NULL;
return 0;
}
PANTHEIOS_CALL(void) pantheios_fe_uninit(void* token)
{}
PANTHEIOS_CALL(PAN_CHAR_T const*) pantheios_fe_getProcessIdentity (void * token)
{
return PANTHEIOS_LITERAL_STRING(MY_PROGRAM_ID);
}
PANTHEIOS_CALL(int) pantheios_fe_isSeverityLogged(void* token
, int severity
, int backEndId)
{
//SEV_CRITICAL=2 < SEV_ERROR=3 < SEV_WARNING=4 < SEV_INFORMATIONAL=6
if(severity <= pantheios::SEV_INFORMATIONAL)
return 1;//allow output for anything above information lvl
return 0;
}
#endif
In the main exe program where I need to add logging I use (after looked this link in SO talking about PANTHEIOS_BE_FILE_F_SHARE_ON_WINDOWS):
pantheios_be_file_setFilePath(PSTR("C:\\TestLog.log"),**PANTHEIOS_BE_FILE_F_SHARE_ON_WINDOWS**, 0, PANTHEIOS_BEID_ALL);
pantheios::log_NOTICE(PSTR("process id: ["), pantheios::processId, PSTR("]"));
pantheios::log_NOTICE(PSTR("thread id: ["), pantheios::threadId, PSTR("]"));
pantheios::log_INFORMATIONAL(PSTR("testing log messagse"));
This works fine, and I can get logging in c:\TestLog.log file as expected. However, I cannot get logging at all in those two DLLs, it simply gives erros for each logging call:
pantheios::log_INFORMATIONAL(PSTR("testing message"));
saying the token is emtpy, so I Googled and found a solution:
2) I need to call:
pantheios::init();
for each DLL initialization inside their DllMain function. This way, there is no more "empty token" error when I try to log in the DLL, but still there's nothing logged by the DLLs in the log file (again, the main exe program is fine).
3) I tweaked stuff a bit and I have to change the logging file names in the DLL loggings so they all log to different files:
DLL #1:
pantheios_be_file_setFilePath(PSTR("C:\\TestLogDll1.log"),PANTHEIOS_BE_FILE_F_SHARE_ON_WINDOWS, 0, PANTHEIOS_BEID_ALL);
DLL #2:
pantheios_be_file_setFilePath(PSTR("C:\\TestLogDll2.log"),PANTHEIOS_BE_FILE_F_SHARE_ON_WINDOWS, 0, PANTHEIOS_BEID_ALL);
This way I have 3 logging files all working fine:
- TestLog.log for the main program
- TestLogDll1.log for DLL #1
- TestLogDll2.log for DLL #2
But still I just cannot get both DLLs logging to the same file as the main exe does (TestLog.log).
