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#include <stdio.h>
#include "erl_driver.h"
static ErlDrvPort erlang_port;
static ErlDrvData easy_start(ErlDrvPort, char*);
static void easy_stop(ErlDrvData), easy_read(ErlDrvData, char*, ErlDrvSizeT);
static ErlDrvEntry easy_driver_entry =
{
NULL,
easy_start,
easy_stop,
easy_read,
NULL,
NULL,
"easy",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
0,
NULL,
NULL,
NULL
};
#ifdef __WIN32__
/*
* Define a correct driver_init here, or the module won't compile.
* Note that it will not actually be used.
*/
DRIVER_INIT(noinit_drv)
#else
/*
* Provoke an error when loading the module.
*/
ErlDrvEntry* no_driver_init(void *handle)
#endif
{
erlang_port = (ErlDrvPort)-1;
return &easy_driver_entry;
}
static ErlDrvData easy_start(ErlDrvPort port,char *buf)
{
if (erlang_port != (ErlDrvPort)-1) {
return ERL_DRV_ERROR_GENERAL;
}
fprintf(stderr, "Easy driver started with args %s\n", buf);
erlang_port = port;
return (ErlDrvData)port;
}
static void easy_read(ErlDrvData port, char *buf, ErlDrvSizeT count)
{
driver_output(erlang_port, buf, count);
}
static void easy_stop(ErlDrvData port)
{
erlang_port = (ErlDrvPort)-1;
}
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