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Questions tagged [erlang-driver]

21 questions
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1 answer

Short Circuit Erlang Port Mapper Daemon

Given a known TCP port and name for a remote beam.smp service, as well as a known cookie, is it possible to short circuit the Erlang Port Mapper Daemon handshake phase of the Erlang distribution protocol and establish an Erlang shell directly to the…
Anthony Roe
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errors in a loop

Given the following loop on each element of a list: lists:foldl(fun(X) -> ... end,N,Y), How to catch the errors and continue to loop on the elements ? Same question if this code is in a gen_server and if process_flag(trap_exit, true) ?
Bertaud
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What is the best way of doing computationally intensive tasks in Erlang w/o scalability sacrifices?

Erlang Interoperability guide discusses different interoperability mechanisms. Here are my conclusions: Ports and Erl_Interface programs: OS scheduled, limit scalability. Port Drivers: dangerous because a crash in the port driver brings…
spc16670
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'Bad Connection Handle' in aerospike ejabberd integration

tried to integrate the Aerospike with Ejabberd, and after little bit of struggle and I had hit another issue which says " DEBUG:[util_extract_common_lead_parms()]:Connection Handle is bad C(0) DEBUG:[util_extract_common_lead_parms()]:Connection…
LIL
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2 answers

Profiling linked-in drivers in Erlang

How can I profile a linked-in port driver? OTP tools (fprof, etc.) apparently only profile Erlang code, and I don't have a C executable file to feed to gprof.
Alexey Romanov
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Erlang - Parse data from the enclosed curly braces

Erlang experts, I am getting a data like the following from ejabberd server I(<0.397.0>:mod_http_offline:38) : Data of Fromu {jid,"timok","localhost", "25636221451404911062246700", …
Timothy Rajan
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Sending terms instead of iolists to an Erlang driver

Is there an equivalent of driver_output_term in the other direction, i.e. sending an Erlang term to the driver without converting it to an iolist first? If not, I presumably should convert my term using term_to_binary and parse it on the C side with…
Alexey Romanov
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Erlang driver erl_errno issue

I am playing with erl_driver. Start callback of my driver is below: ErlDrvData drv_start(ErlDrvPort port, char* command) { char* file_name = command + sizeof(drv_name); GenTtyData* port_data = (GenTtyData*)driver_alloc(sizeof(GenTtyData)); …
Viacheslav Kovalev
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Are there macros which can be used to test Erlang version in driver C code?

Erlang R15B added ErlDrvSSizeT typedef, and R16B added erl_drv_output_term function and deprecated the old equivalent. Is there a way to test for these differences with preprocessor macros in order to support older Erlang versions with the same…
Alexey Romanov
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How to continue last session, after network disconnect?

I am working in android application using ejabberd as a server.I make call to user using VOIP. I disconnected from server when my internet connection goes down.After internet connection come, I need to continue last session,before timeout occurs.I…
BABU K
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Could not install mysql driver Erlang : src/mysql_auth.erl:178: crypto:sha/1 is deprecated and will be removed in in a future

I ve been trying to install mysql driver using https://github.com/dizzyd/erlang-mysql-driver ==> mysql (compile) compile: warnings being treated as errors src/mysql_auth.erl:178: crypto:sha/1 is deprecated and will be removed in in a future release;…
channa ly
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How to compile an Erlang driver?

I am trying to better understand how Erlang drivers work, and I started with a simple example from a book, but when I went to compile the C file containing the native Erlang driver code I got the following compile error…
user2864661
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How to read erlang term from redis by using java client?

e.g. I save the tuple T = {k1, v1, k2, v2} to the redis by jedis: eredis:q(Conn, ["SET", <<"mykey">>, term_to_binary(T)]). I am trying to use the code below to read this erlang term: Jedis j = Redis.pool.getResource(); byte[] t =…
Mark_H
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Strange thing about mongodb-erlang driver when using replica set

My code is like this: Replset = {<<"rs1">>, [{localhost, 27017}, {localhost, 27018}, {localhost, 27019}]}, Conn_Pool = resource_pool:new (mongo:rs_connect_factory(Replset), 10), ... Conn = resource_pool:get(Conn_Pool) case mongo:do(safe,…
Mark_H
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glpkerl (glpk erlang library) compile error

I am trying to compile the glpkerl library on Ubuntu 11.10, but without success so far. Since I am getting errors all the way, maybe there is something crucial that I am missing: What I tried My installed Erlang version is R14B02 (installed via the…
Andor Goetzendorff
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