Failed to run only one instance

Question

0.00/5 (No votes)

See more:

Coding environment: Labwindows CVI 2012, something like language C.

My last application (*.exe) can run smoothly, but it has no function to prevent it run more than one instance at the same time on same IPC.
Can somebody show me how to use language C to commit this?

Thank you.

Posted 3-Sep-14 0:53am

yuzaihuan

Add a Solution

2 solutions

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

KarstenK · Accepted Answer · 2014-09-03T02:53:00

Solution 1

I used this code with CreateMutex similar in earlier times.

C++

//in the header
HANDLE m_hMutex;
//implemetn
CString Mutex = CString("Global\\")+AppTitel;
m_hMutex = CreateMutex(NULL, false, Mutex);

if (m_hMutex == NULL || GetLastError() == ERROR_ALREADY_EXISTS) {
  return false;
}


//Cleanup if existing the program!!!
if (m_hMutex) {CloseHandle(m_hMutex); m_hMutex = NULL;}

Posted 3-Sep-14 2:53am

KarstenK

Comments

CPallini 3-Sep-14 8:54am

Yes, that's the usual way. 5.

yuzaihuan 3-Sep-14 20:47pm

It is OK in C++, or C#, but can I transform this code into C, if yes how to do ?

Thank you.

KarstenK 4-Sep-14 2:02am

you must only change the CString to a char array and you're done...

yuzaihuan 4-Sep-14 21:35pm

got it, I think I need add windows API to use "CreateMutex()" in my code.

yuzaihuan 15-Sep-14 3:15am

Thank u, KarstenK.
I have tested the code, it is OK.
Need add #include <windows.h> first.

Abhinav S · Accepted Answer · 2014-09-03T16:46:00

Solution 3

Neat link that demonstrates many 'single-instance' solutions - http://rosettacode.org/wiki/Determine_if_only_one_instance_is_running[^].

Posted 3-Sep-14 16:46pm

Abhinav S

Comments

KarstenK 4-Sep-14 2:04am

It isnt a proper solution on Windows. See me my solution and the link.

yuzaihuan 4-Sep-14 21:42pm

POSIX is from Unix, but environment is Windows.

Failed to run only one instance

2 solutions

Solution 1

Solution 3

Add your solution here

Preview 0

Failed to run only one instance

2 solutions

Solution 1

Solution 3

Add your solution here

Preview 0

Existing Members

...or Join us