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Problem with recursive mutex : pthread_mutex_unlock() returns EPERM code
- From: Konstantin Voronkov <beowinkle at yahoo dot com>
- To: pthreads-win32 at sources dot redhat dot com
- Date: Thu, 30 Dec 2004 07:27:16 -0800 (PST)
- Subject: Problem with recursive mutex : pthread_mutex_unlock() returns EPERM code
Hello All!
I have problem with recursive mutex.
pthread_mutex_unlock()
returns 1 EPERM code. I do not understan what I'm
doing wrong,
can you help me, please?
I'm using pthread-win32 snapshot 2004-11-22 pre-build
library. The library taken from here:
http://sources.redhat.com/pthreads-win32/
I managed to reproduce problem in simple test
application.
Abort happens here after some time of work of this
program:
#include <pthread.h>
#include <windows.h>
class MutexWrapper
{
public:
// mutex initialization
MutexWrapper()
: m_reg_mutex(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
{
}
// mutex freeing
~MutexWrapper()
{
pthread_mutex_destroy(&m_reg_mutex);
}
// locks the mutex
void Lock()
{
pthread_mutex_lock(&m_reg_mutex);
}
void UnLock()
{
const int retCode =
pthread_mutex_unlock(&m_reg_mutex);
if(retCode)
// abort happens here after
some time of work of program
abort();
}
private:
pthread_mutex_t m_reg_mutex; // mutex object
member
};
unsigned long WINAPI threadFunc(void *mux)
{
while(true)
{
reinterpret_cast<MutexWrapper *>(mux)->Lock();
reinterpret_cast<MutexWrapper *>(mux)->UnLock();
}
return 0;
}
int main(int argc, char* argv[])
{
MutexWrapper mux;
CreateThread(0, 0, threadFunc, &mux, 0, 0);
while(true)
{
mux.Lock();
mux.UnLock();
}
return 0;
}
================
the project settings of test application:
linker options: pthreadVC1.lib /nologo
/subsystem:console /incremental:no
/pdb:"Release/CsuByteArrayTest.pdb" /machine:I386
compiler options: /nologo /MD /W3 /GX /O2 /D "WIN32"
/D "NDEBUG" /D "_CONSOLE"
/D "_MBCS" /Fo"Release/" /Fd"Release/" /FD /c
problem reproduces with MSVC 6.0 sp5 compiler
problem reproduces on WinXP sp2, and on Windows 2000
sp4
Best Regards,
Voronkov Konstantin
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