mirror of git://gcc.gnu.org/git/gcc.git
0536d5b37d
The old __sync builtins have been deprecated for a long time now in
favor of the __atomic builtins following the C++11/C11 memory model.
This patch converts libgfortran to use the modern __atomic builtins.
At the same time I weakened the consistency to relaxed for
incrementing and decrementing the counter, and acquire-release when
decrementing to check whether the counter is 0 and the unit can be
freed. This is similar to e.g. std::shared_ptr in C++.
Regtested on x86_64-pc-linux-gnu.
libgfortran/ChangeLog:
2018-11-22 Janne Blomqvist <jb@gcc.gnu.org>
* acinclude.m4 (LIBGFOR_CHECK_ATOMIC_FETCH_ADD): Rename and test
presence of atomic builtins instead of sync builtins.
* configure.ac (LIBGFOR_CHECK_ATOMIC_FETCH_ADD): Call new test.
* io/io.h (inc_waiting_locked): Use __atomic_fetch_add.
(predec_waiting_locked): Use __atomic_add_fetch.
(dec_waiting_unlocked): Use __atomic_fetch_add.
* config.h.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
From-SVN: r266367
|
||
|---|---|---|
| .. | ||
| caf | ||
| config | ||
| generated | ||
| ieee | ||
| intrinsics | ||
| io | ||
| m4 | ||
| runtime | ||
| ChangeLog | ||
| ChangeLog-2002 | ||
| ChangeLog-2003 | ||
| ChangeLog-2004 | ||
| ChangeLog-2005 | ||
| ChangeLog-2006 | ||
| ChangeLog-2007 | ||
| ChangeLog-2008 | ||
| ChangeLog-2009 | ||
| ChangeLog-2010 | ||
| ChangeLog-2011 | ||
| ChangeLog-2012 | ||
| ChangeLog-2013 | ||
| ChangeLog-2014 | ||
| ChangeLog-2015 | ||
| ChangeLog-2016 | ||
| ChangeLog-2017 | ||
| Makefile.am | ||
| Makefile.in | ||
| acinclude.m4 | ||
| aclocal.m4 | ||
| c99_protos.h | ||
| config.h.in | ||
| configure | ||
| configure.ac | ||
| configure.host | ||
| gfortran.map | ||
| kinds-override.h | ||
| libgfortran.h | ||
| libgfortran.spec.in | ||
| libtool-version | ||
| mk-kinds-h.sh | ||
| mk-sik-inc.sh | ||
| mk-srk-inc.sh | ||