 27 Nov 2025, Konstantin Olchanski, Info, switch midas to c++17
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>
> set(CMAKE_CXX_STANDARD 17)
> set(CMAKE_CXX_STANDARD_REQUIRED ON)
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27 Nov 2025, Konstantin Olchanski, Forum, Control external process from inside MIDAS
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> Rather than investing time to re-invent the wheel here, better try to modify your EPICS driver process to
become a midas process.
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28 Nov 2025, Konstantin Olchanski, Suggestion, mvodb WS and family type matching
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> > 2) "advanced" c++ code:
> >
> > void foo(const std::string& xxx) { ... };
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28 Nov 2025, Konstantin Olchanski, Suggestion, mvodb WS and family type matching
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Just in time, enter std::string_view.
https://stackoverflow.com/questions/40127965/how-exactly-is-stdstring-view-faster-than-const-stdstring
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 01 Dec 2025, Konstantin Olchanski, Bug Fix, mvodb updated
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I updated mvodb and test_mvodb. MIDAS ODB and JSON ODB now implement all API
functions. ReadKey, ReadDir and ReadKeyLastWritten were previously missing from
some implementations.
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01 Dec 2025, Konstantin Olchanski, Info, MIDAS RPC add support for std::string and std::vector<char>
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> This is moving slowly. I now have RPC caller side support for std::string and
> std::vector<char>. RPC server side is next. K.O.
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02 Dec 2025, Konstantin Olchanski, Info, cm_expand_env()
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Just to remember, MIDAS has cm_expand_env() to expand environment variables, in
file paths, etc. It is used in several places in mhttpd, msequencer and mjsonrpc.
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03 Dec 2025, Konstantin Olchanski, Bug Fix, no more breakage in history display when panning
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In the DL experiment (unknown version of midas, likely mid-summer 2025), we see artefacts in the
history display where pieces of the data seem to be missing, there is gaps in the graphs. reloading the
page restores correct display confirming that in fact there is no gaps in the data. This made history
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03 Dec 2025, Konstantin Olchanski, Suggestion, Improve process for adding new variables that can be shown in history plots
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> 3b) mlogger used to rescan ODB each time a new run is started, this code was removed
One more kink turned out.
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05 Dec 2025, Konstantin Olchanski, Info, MIDAS RPC add support for std::string and std::vector<char>
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> > This is moving slowly. I now have RPC caller side support for std::string and
> > std::vector<char>. RPC server side is next. K.O.
> The RPC_CXX code is now merged into MIDAS branch feature/rpc_call_cxx.
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05 Dec 2025, Konstantin Olchanski, Bug Fix, update of JRPC and BRPC
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With the merge of RPC_CXX code, MIDAS RPC can now return data of arbitrary large size and I am
proceeding to update the corresponding mjsonrpc interface.
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05 Dec 2025, Konstantin Olchanski, Info, address and thread sanitizers
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I added cmake support for the thread sanitizer (address sanitizer was already
there). Use:
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14 Feb 2020, Konrad Briggl, Forum, Writting Midas Events via FPGAs
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Hello Stefan,
is there a difference for the later data processing (after writing the ring buffer blocks)
if we write single events or multiple in one rb_get_wp - memcopy - rb_increment_wp cycle?
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02 Mar 2007, Kevin Lynch, Forum, event builder scalability
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> Hi there:
> I have a question if there's anybody out there running MIDAS with event builder
> that assembles events from more that just a few front ends (say on the order of
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15 Dec 2016, Kevin Giovanetti, Bug Report, midas.h error
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creating a frontend on MAC Sierra OSX 10
include the midas.h file and when compiling with XCode I get an error based on
this entry in the midas.h include
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30 Oct 2018, Joseph McKenna, Bug Report, Side panel auto-expands when history page updates
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One can collapse the side panel when looking at history pages with the button in
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31 Oct 2018, Joseph McKenna, Bug Report, Side panel auto-expands when history page updates
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> >
> >
> > One can collapse the side panel when looking at history pages with the button in
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14 Oct 2019, Joseph McKenna, Forum, tmfe.cxx - Future frontend design
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Hi,
I have been looking at the 2019 workshop slides, I am interested in the C++ future of MIDAS.
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18 Oct 2019, Joseph McKenna, Info, sysmon: New system monitor and performance logging frontend added to MIDAS 
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I have written a system monitor tool for MIDAS, that has been merged in the develop branch today: sysmon
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03 Dec 2019, Joseph McKenna, Info, mfe.c: MIDAS frontend's 'Equipment name' can embed hostname, determined at run-time
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A little advertised feature of the modifications needed support the msysmon program is
that MIDAS equipment names can support the injecting of the hostname of the system
running the frontend at runtime (register_equipment(void)).
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