606baf5566
Among all the open readers of a FIFO, one is declared to be the owner. This is the only reader that listens for client connections, and it is the only one that has an accurate fc_handler list. Add shared data and methods for getting and setting the owner, as well as a lock to prevent more than one reader from accessing these data simultaneously. Modify the fifo_reader_thread so that it checks the owner at the beginning of its loop. If there is no owner, it takes ownership. If there is an owner but it is a different reader, the thread just waits to be canceled. Otherwise, it listens for client connections as before. Remove the 'first' argument from create_pipe_instance. It is not needed, and it may be confusing in the future since only the owner knows whether a pipe instance is the first. When opening a reader, don't return until the fifo_reader_thread has time to set an owner. If the owner closes, indicate that there is no longer an owner. Clear the child's fc_handler list in dup, and don't bother duplicating the handles. The child never starts out as owner, so it can't use those handles. Do the same thing in fixup_after_fork in the close-on-exec case. In the non-close-on-exec case, the child inherits an fc_handler list that it can't use, but we can just leave it alone; the handles will be closed when the child is closed. |
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| config | ||
| etc | ||
| include | ||
| libgloss | ||
| newlib | ||
| texinfo | ||
| winsup | ||
| .drone.yml | ||
| .gitattributes | ||
| .gitignore | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.LIBGLOSS | ||
| COPYING.NEWLIB | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| ChangeLog | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| README | ||
| README-maintainer-mode | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| depcomp | ||
| djunpack.bat | ||
| install-sh | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| makefile.vms | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| setup.com | ||
| src-release | ||
| symlink-tree | ||
| ylwrap | ||
README
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.