76     def __init__(self, inheritable_pipe, jobs, internal_jobs=0, makeflags=None):  argument
79         self.jobs = jobs
109     def from_environ(cls, env=None, jobs=0):  argument
127             jobs: The number of jobs set by the user on the command line.
141             if jobs:
174         if not jobs:
177                 jobs = int(match.group(1))
178                 if jobs == 1:
183         return cls(pipe, jobs, internal_jobs=1, makeflags=makeflags)
209         if self.jobs:
210             flag += f" -j{self.jobs}"
211         if self.jobs != 1 and self._inheritable_pipe is not None:
217         if self.jobs != 1 and self._inheritable_pipe is not None:
229     def __init__(self, jobs=0):  argument
230         if not jobs:
231             jobs = multiprocessing.cpu_count()
232         elif jobs > select.PIPE_BUF:
233             jobs = select.PIPE_BUF
234         super().__init__(os.pipe(), jobs)
236         os.write(self._inheritable_pipe[1], b"+" * jobs)