The implementation using select() limits file desciptors to FD_SETSIZE,
typically 1024 on Linux. This number is too low for some applications,
for example for the CA gateway.
Therefore, Linux builds use poll() instead.
This flag causes EPICS to call abort() on assertion failures rather than
suspend the executing thread. With the epicsThreadSuspendSelf() behavior,
an IOC can end up in a difficult to detect error state where one or more
threads has essentially crashed due to an assertion failure.
This also matches the C behavior of assert(3)
For posix-ish systems, we previously checked that a path was relative
by simpy checking if it included a '/' character. This meant that you
could not, for example, do
```
$ cat foo.substitutions
file rel/to/bar.template {
}
$ msi -I /some/path foo.substitutions
```
where our template file is located at `/some/path/rel/to/bar.template`.
Note that relateive paths work differently on Windows, so we carve out
an exception there.
MS and MSI links do not propagate STAT and therefore do not propagate
AMSG, either. CA, CP and CPP links also do not propagate AMSG, but the
reason is technical: the message is not available over Channel Access.
Previously, there was no way to clear AMSG when setting a no-alarm
status: it kept the last error message, and it is strange to have a
record that has no alarm while showing an error. With this change, the
NAMSG field is treated the same as NSTA and NSEV: they are cleared when
their content is moved to STAT, SEVR, and AMSG.
Save/restore dbAddr::pfield around callbacks to
avoid corruption if CB forgets to restore.
Need to peak at dbChannel.h during libCom build.
So generate dbCoreAPI.h early, and add extra
-I to source location when compiling dbTrapWrite.c
This enables us to use toctrees, which informs Sphinx on the global
documentation structure, and removes warnings about not-included
documents.
The old ComponentReference.pod was kept, in order to not break the old
HTML output, but the new Markdown file is used as source for the
generated markdown files in doc/
Markdown can be generated from .pod and .dbd.pod files.
Markdown will be generated and installed by "make inc".
Co-authored-by: Timo Korhonen <timo.korhonen@ess.eu>
Co-authored-by: Andrew Johnson <anj@anl.gov>
Besides being deprecated in C++11 and removed in C++17, the intended use
case for this was always wrong, since std::unexpected() is called by the
C++ runtime when a function throws an exception that was not specified
in its "dynamic exception specification", which is different from an
exception thrown by user code which wasn't caught [1,2]. Using abort()
keeps the same behavior, but with the intended semantics.
We don't use std::abort() to simplify backwards compatibility.
[1] https://github.com/epics-base/epics-base/issues/343
[2] https://en.cppreference.com/w/cpp/error/unexpected
