fopen () returns NULL, wonderful cause: The current process opens multiple handles and forgets to close. (bug)

Today, when testing a program, suddenly the first time the error dialog box, prompted: the creation of a new file failed. fopen () returns NULL

I restarted the program test again, or prompted the same error.

After a few minutes of checking, a rule was found: when dealing with more than 500 files, it began to hang.

Finally found the reason, because there is a piece of code in the processing of files encountered errors, forget fclose ().

When dealing with more than 500 files, it also means that the current process fopen () more than 500 files, just as Windows has a limit on the number of handles to the process open file (Baidu a bit).

So the result: fopen () returns NULL.

2014-07-17

fopen () returns NULL, wonderful cause: The current process opens multiple handles and forgets to close. (bug)