[PATCH] Thread safe stdio

[Thomas Pfaff]

Christopher Faylor wrote:
> On Wed, Feb 11, 2004 at 11:08:57AM +0100, Thomas Pfaff wrote:
> 
>>The __sinit call must be done after malloc is initialized, otherwise the 
>>mutex creation will fail.
> 
> 
> I am not comfortable with this part of the patch.  I moved the __sinit
> call where I did for a reason.  It needed to be called earlier in the
> process.  I'm also somewhat uncomfortable with using malloc for this
> purpose in general.  It seems like a heavyweight solution to something
> that could be solved with either a muto or a critical section.
> 
> 

Please keep in mind that:

- There does not exist only one mutex, every file has its own that is 
created on fopen and destroyed when it is closed.

- I do not call malloc directly, it is called as part of the mutex creation.

- Every mutex that is associated with an open file must be fork save, it 
has to be recreated after a fork.

- _flock_t can not be a CRITICAL_SECTION nor class muto. You can not 
implement newlibs _LOCK_INIT macro with this types, i have not seen 
something like a CRITICAL_SECTION_INITIALIZER or a MUTO_INITIALIZER.