thread trouble when several schedulers try to write TTLogMessage at the same time

[theod]

Here is a crash log where 3 threads were writing in the same time and one crashes :

Crashed Thread: 7

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Application Specific Information:
[22968] stack overflow

Thread 5:
0 libsystem_kernel.dylib 0x00007fff87c4f122 __psynch_mutexwait + 10
1 libsystem_c.dylib 0x00007fff89e9fdcd pthread_mutex_lock + 536
2 libsystem_c.dylib 0x00007fff89f02443 flockfile + 42
3 libsystem_c.dylib 0x00007fff89f05977 fwrite + 84
4 libc++.1.dylib 0x00007fff824b1140 std::__1::__stdoutbuf::overflow(int) + 288
5 JamomaFoundation.dylib 0x000000010f75b50f std::__1::ostreambuf_iterator<char, std::__1::char_traits > std::__1::__pad_and_output<char, std::__1::ostreambuf_iterator<char, std::__1::char_traits > >(std::_1::ostreambuf_iterator<char, std::1::char_traits >, char const, char const, char const, std::__1::ios_base&, char) + 927
6 JamomaFoundation.dylib 0x000000010f75aeb5 std::__1::basic_ostream<char, std::__1::char_traits >& std::__1::operator<<std::__1::char_traits(std::_1::basic_ostream<char, std::1::char_traits >&, char const) + 789
7 JamomaFoundation.dylib 0x000000010f77cd49 TTLogMessage(char const, ...) + 441
8 System.ttdylib 0x00000001177cd8be System::computeDeltaTime() + 206 (System.cpp:211)
9 System.ttdylib 0x00000001177cd57c System::Tick() + 28 (System.cpp:137)
10 System.ttdylib 0x00000001177cd3fb SystemThreadCallback(void) + 203 (System.cpp:251)
11 JamomaFoundation.dylib 0x000000010f7719a0 TTThread::doCallbackMethod() + 48
12 JamomaFoundation.dylib 0x000000010f77186d TTThreadCallback(void*) + 29
13 libsystem_c.dylib 0x00007fff89e9a772 _pthread_start + 327
14 libsystem_c.dylib 0x00007fff89e871a1 thread_start + 13

Thread 7 Crashed:
0 libsystem_kernel.dylib 0x00007fff87c4f212 __pthread_kill + 10
1 libsystem_c.dylib 0x00007fff89e9bb24 pthread_kill + 90
2 libsystem_c.dylib 0x00007fff89ee0031 __abort + 159
3 libsystem_c.dylib 0x00007fff89ee0f97 __stack_chk_fail + 195
4 libc++.1.dylib 0x00007fff824b119b std::__1::__stdoutbuf::overflow(int) + 379
5 JamomaFoundation.dylib 0x000000010f75b50f std::__1::ostreambuf_iterator<char, std::__1::char_traits > std::__1::__pad_and_output<char, std::__1::ostreambuf_iterator<char, std::__1::char_traits > >(std::_1::ostreambuf_iterator<char, std::1::char_traits >, char const, char const, char const, std::__1::ios_base&, char) + 927
6 JamomaFoundation.dylib 0x000000010f75aeb5 std::__1::basic_ostream<char, std::__1::char_traits >& std::__1::operator<<std::__1::char_traits(std::_1::basic_ostream<char, std::1::char_traits >&, char const) + 789
7 JamomaFoundation.dylib 0x000000010f77cd49 TTLogMessage(char const, ...) + 441
8 System.ttdylib 0x00000001177cd8be System::computeDeltaTime() + 206 (System.cpp:211)
9 System.ttdylib 0x00000001177cd57c System::Tick() + 28 (System.cpp:137)
10 System.ttdylib 0x00000001177cd3fb SystemThreadCallback(void) + 203 (System.cpp:251)
11 JamomaFoundation.dylib 0x000000010f7719a0 TTThread::doCallbackMethod() + 48
12 JamomaFoundation.dylib 0x000000010f77186d TTThreadCallback(void*) + 29
13 libsystem_c.dylib 0x00007fff89e9a772 _pthread_start + 327
14 libsystem_c.dylib 0x00007fff89e871a1 thread_start + 13

Thread 8:
0 libsystem_kernel.dylib 0x00007fff87c4f122 __psynch_mutexwait + 10
1 libsystem_c.dylib 0x00007fff89e9fdcd pthread_mutex_lock + 536
2 libsystem_c.dylib 0x00007fff89f02443 flockfile + 42
3 libsystem_c.dylib 0x00007fff89f05977 fwrite + 84
4 libc++.1.dylib 0x00007fff824b1140 std::__1::__stdoutbuf::overflow(int) + 288
5 JamomaFoundation.dylib 0x000000010f75b50f std::__1::ostreambuf_iterator<char, std::__1::char_traits > std::__1::__pad_and_output<char, std::__1::ostreambuf_iterator<char, std::__1::char_traits > >(std::_1::ostreambuf_iterator<char, std::1::char_traits >, char const, char const, char const, std::__1::ios_base&, char) + 927
6 JamomaFoundation.dylib 0x000000010f75aeb5 std::__1::basic_ostream<char, std::__1::char_traits >& std::__1::operator<<std::__1::char_traits(std::_1::basic_ostream<char, std::1::char_traits >&, char const) + 789
7 JamomaFoundation.dylib 0x000000010f77cd49 TTLogMessage(char const, ...) + 441
8 System.ttdylib 0x00000001177cd8be System::computeDeltaTime() + 206 (System.cpp:211)
9 System.ttdylib 0x00000001177cd57c System::Tick() + 28 (System.cpp:137)
10 System.ttdylib 0x00000001177cd3fb SystemThreadCallback(void) + 203 (System.cpp:251)
11 JamomaFoundation.dylib 0x000000010f7719a0 TTThread::doCallbackMethod() + 48
12 JamomaFoundation.dylib 0x000000010f77186d TTThreadCallback(void*) + 29
13 libsystem_c.dylib 0x00007fff89e9a772 _pthread_start + 327
14 libsystem_c.dylib 0x00007fff89e871a1 thread_start + 13

[theod]

In System::computeDeltatTime there is a TTLogMessage written when it seems the currentTime is lower than the lastTime sometimes (another bug I never manage to solve) :

        TTLogMessage("System::computeDeltaTime() : currentTime (%Lu) is lower than lastTime (%Lu)\n", currentTime, mLastTime);

It is maybe due to the fact currentTime or mLastTime are bad numbers so they cannot be written (?)