Lines Matching +full:os +full:- +full:initiated

2 # SPDX-License-Identifier: GPL-2.0+
11 A "normal" jobserver task, like the one initiated by a make subrocess would do:
13     - open read/write file descriptors to communicate with the job server;
14     - ask for one slot by calling:
15         claim = os.read(reader, 1)
16     - when the job finshes, call:
17         os.write(writer, b"+")  # os.write(writer, claim)
23 call equivalent to make -j$((claim+1)), e.g. having a parent make creating
27 limit established by the initial make -j$n_proc call.
30     https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html#POSIX-Jobserver
34 import os
43     - open(): reserves all slots;
44     - close(): method returns all used slots back to make;
45     - run(): executes a command setting PARALLELISM=<available slots jobs + 1>
64             flags = os.environ["MAKEFLAGS"]
65             # Look for "--jobserver=R,W"
66             # Note that GNU Make has used --jobserver-fds and --jobserver-auth
68             opts = [x for x in flags.split(" ") if x.startswith("--jobserver")]
72             # --jobserver-auth= option, the last one is relevant.
73             fds = opts[-1].split("=", 1)[1]
77             # Example argument: --jobserver-auth=fifo:/tmp/GMfifo8134
81                 self.reader = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
82                 self.writer = os.open(path, os.O_WRONLY)
87                 self.reader = os.open("/proc/self/fd/%d" % (self.reader),
88                                       os.O_RDONLY | os.O_NONBLOCK)
93                     slot = os.read(self.reader, 8)
101                         os.write(self.writer, self.jobs)
123             os.write(self.writer, self.jobs)
143         # top-level "-jN" argument) and there were no other failures. Otherwise
147             os.environ["PARALLELISM"] = str(self.claim)