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#ifdef __WIN32__
#include <windows.h>
#endif
#include <stdio.h>
#include <string.h>
#include "erl_driver.h"
static ErlDrvPort erlang_port;
static ErlDrvData many_events_start(ErlDrvPort, char *);
static void from_erlang(ErlDrvData, char*, ErlDrvSizeT);
static void from_port(ErlDrvData drv_data, ErlDrvEvent event);
static ErlDrvSSizeT many_events_call(ErlDrvData drv_data, unsigned int command,
char *buf, ErlDrvSizeT len,
char **rbuf, ErlDrvSizeT rlen,
unsigned *ret_flags);
static ErlDrvEntry many_events_driver_entry = {
NULL, /* Init */
many_events_start,
NULL, /* Stop */
from_erlang,
from_port, /* Ready input */
NULL, /* Ready output */
"many_events_drv",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
many_events_call,
NULL,
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
0,
NULL,
NULL,
NULL
};
DRIVER_INIT(many_events_drv)
{
return &many_events_driver_entry;
}
static ErlDrvData
many_events_start(ErlDrvPort port, char *buf)
{
return (ErlDrvData) port;
}
static void
from_erlang(ErlDrvData data, char *buf, ErlDrvSizeT count)
{
int i;
int num;
char *b2 = driver_alloc(count + 1);
char b3[1024];
memcpy(b2,buf,count);
b2[count] = '\0';
num = atoi(b2);
driver_free(b2);
if(num < 0)
num = 0;
#ifdef __WIN32__
for (i = 0; i < num; ++i) {
HANDLE ev = CreateEvent(NULL, TRUE, FALSE, NULL);
if (ev == INVALID_HANDLE_VALUE ||
driver_select((ErlDrvPort) data, (ErlDrvEvent) ev,
DO_READ, 1) != 0) {
break;
}
SetEvent(ev);
}
#else
i = num;
#endif
sprintf(b3,"%d",i);
driver_output((ErlDrvPort) data, b3, strlen(b3));
}
static void from_port(ErlDrvData data, ErlDrvEvent ev)
{
#ifdef __WIN32__
/*static int counter = 0;*/
driver_select((ErlDrvPort) data, (ErlDrvEvent) ev,
DO_READ, 0);
CloseHandle((HANDLE) ev);
/*fprintf(stderr,"Close no %d\r\n",counter++);*/
#endif
return;
}
static ErlDrvSSizeT
many_events_call(ErlDrvData drv_data, unsigned int command,
char *buf, ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen,
unsigned *ret_flags)
{
*rbuf = buf;
*ret_flags |= DRIVER_CALL_KEEP_BUFFER;
return len;
}
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