minc_tools.py 文件源码

def cache(self,name,suffix=''):
        """Allocate a name in cache, if cache was setup
        also lock the file , so that another process have to wait before using the same file name

        Important: call unlock() on result
        """
        #TODO: something more clever here?
        fname=''
        if self.work_dir is not None:
            fname=self.cache_dir+os.sep+name+suffix
            lock_name=fname+'.lock'
            f=self._locks[lock_name]=open(lock_name, 'a')
            fcntl.lockf(f.fileno(), fcntl.LOCK_EX )
        else:
            fname=self.tmp(name+suffix)

        return fname