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Diffstat (limited to 'lib/libpthread/stdio/README')
-rw-r--r-- | lib/libpthread/stdio/README | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/lib/libpthread/stdio/README b/lib/libpthread/stdio/README deleted file mode 100644 index 017f61f1b46..00000000000 --- a/lib/libpthread/stdio/README +++ /dev/null @@ -1,40 +0,0 @@ -This is a threadsafe stdio based on the BSD stdio written by Chris Torek. - -INCLUDE FILES AND PORTING -To continue to make this package portable, some basic rules on includes -files must be followed. - -pthread.h should be included first (if it is to be included). -stdio.h should be included. - -INTERNAL LOCKING -1. All functions that can be called by the user must have __flockfile at the - begining and a __funlockfile at the end. __Flockfile is a counting mutex, - The thread that owns the lock can call __flockfile as many times as - it wants, but must call an equal number of __funlockfile before the - lock will be released. -2. All functions starting with __ shouldn't need addtional locking. -3. Anything that writes the variable __sglue should lock __sfp_mutex, - check __sfp_state, and do a condion wait if it is set. -4. Anything that checks fp->_flag for valididity should also lock - __sfp_mutex. -5. Anything that reads the variable __sglue should lock __sfp_mutex, increment - __sfp_state, and then unlock the mutex. At function return it should - lock the mutex again decrement __sfp_state and check if zero. If so - do a cond_signal, and unlock the mutex. -6. The functions fopen, fdopen, and freopen are the only functions that - will change a fp->_file -7. fdopen and fopen both allocate the next fp by locking __sfp_mutex - checking fp->_flags and then setting it if free. -8. freopen tries to preserve fp->_file. It sets __sfp_mutex, then it - tries to lock fp->_file and close it. -9. __sinit is done with a pthread_once routine. - -Copyright (c) 1993 Chris Provenzano. All rights reserved. - -This product includes software developed by the Univeristy of California, -Berkeley and its contributors. - - -Things to do. -Fix printf so it uses the ininf function. |