Currently the gfortran IO library is supposed to be thread safe. Additionally,
allowing multiple processes to access the same file could be useful, and if we
eventually want to support co-arrays with multiple processes, it will be needed
as co-arrays specify that multiple images can access a single file.
On POSIX this can be accomplished with the fcntl() syscall. We'd certainly want
to make this optional (perhaps with a compiler command-line switch like the fpe
options), to avoid the fcntl() overhead as well as frequent buffer flushing in
normal single-process usage.
--
Summary: [libgfortran] Optionally support multi-process locking
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jb at gcc dot gnu dot org
OtherBugsDependingO 18918,25561
nThis:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25830
