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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2008-2018. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifdef _WIN32
#include <windows.h>
#include <io.h>
#else
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <fcntl.h>
#include <assert.h>
#include "wxe_driver.h"
#define TEMP_BINARY_SIZE 512
static ErlDrvData wxe_driver_start(ErlDrvPort port, char *command);
static void wxe_driver_stop(ErlDrvData handle);
static ErlDrvSSizeT wxe_driver_control(ErlDrvData handle,
unsigned int command,
char* buf, ErlDrvSizeT count,
char** res, ErlDrvSizeT res_size);
static ErlDrvSSizeT wxe_driver_call(ErlDrvData drv_data, unsigned int command,
char *buf, ErlDrvSizeT len,
char **rbuf, ErlDrvSizeT rlen,
unsigned int *flags);
static void standard_outputv(ErlDrvData drv_data, ErlIOVec *ev);
static void wxe_process_died(ErlDrvData drv_data, ErlDrvMonitor *monitor);
int wxe_debug;
wxe_data * wxe_master;
char * erl_wx_privdir;
/*
** The driver struct
*/
static ErlDrvEntry wxe_driver_entry = {
NULL, /* F_PTR init, called at loading */
wxe_driver_start, /* L_PTR start, called when port is opened */
wxe_driver_stop, /* F_PTR stop, called when port is closed */
NULL, /* F_PTR output, called when erlang has sent */
NULL, /* F_PTR ready_input, called when
input descriptor ready */
NULL, /* F_PTR ready_output, called when
output descriptor ready */
"wxe_driver", /* char *driver_name, the argument to open_port */
NULL, /* F_PTR finish, called when unloaded */
NULL, /* void * that is not used (BC) */
wxe_driver_control, /* F_PTR control, port_control callback */
NULL, /* F_PTR timeout, reserved */
standard_outputv, /* F_PTR outputv, reserved */
NULL, /* async */
NULL, /* flush */
wxe_driver_call, /* call */
NULL, /* Event */
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
ERL_DRV_FLAG_USE_PORT_LOCKING, /* Port lock */
NULL, /* Reserved Handle */
wxe_process_died, /* Process Exited */
};
DRIVER_INIT(wxe_driver)
{
return &wxe_driver_entry;
}
ErlDrvPort WXE_DRV_PORT_HANDLE = 0;
ErlDrvTermData WXE_DRV_PORT = 0;
static ErlDrvData
wxe_driver_start(ErlDrvPort port, char *command)
{
wxe_data *data;
data = (wxe_data *) malloc(sizeof(wxe_data));
wxe_debug = 0;
if (data == NULL) {
fprintf(stderr, " Couldn't alloc mem\r\n");
return(ERL_DRV_ERROR_GENERAL); /* ENOMEM */
} else {
ErlDrvTermData term_port = driver_mk_port(port);
set_port_control_flags(port, PORT_CONTROL_FLAG_BINARY);
data->driver_data = NULL;
data->bin = (WXEBinRef*) driver_alloc(sizeof(WXEBinRef)*DEF_BINS);
data->bin[0].from = 0;
data->bin[1].from = 0;
data->bin[2].from = 0;
data->max_bins = DEF_BINS;
data->port_handle = port;
data->port = term_port;
data->pdl = driver_pdl_create(port);
if(WXE_DRV_PORT_HANDLE == 0) {
char *first_space = strchr(command, ' ');
if (first_space) {
char *priv_dir = first_space + 1;
erl_wx_privdir = strdup(priv_dir);
WXE_DRV_PORT_HANDLE = port;
WXE_DRV_PORT = term_port;
wxe_master = data;
if(start_native_gui(data) != 1)
return ERL_DRV_ERROR_GENERAL; /* ENOMEM */
} else {
return ERL_DRV_ERROR_BADARG;
}
} else {
meta_command(CREATE_PORT, data);
}
return (ErlDrvData) data;
}
}
static void
wxe_driver_stop(ErlDrvData handle)
{
wxe_data *sd = ((wxe_data *)handle);
if(sd->port_handle != WXE_DRV_PORT_HANDLE) {
// fprintf(stderr, "%s:%d: STOP \r\n", __FILE__,__LINE__);
meta_command(DELETE_PORT,sd);
} else {
// fprintf(stderr, "%s:%d: STOP \r\n", __FILE__,__LINE__);
stop_native_gui(wxe_master);
free(wxe_master);
wxe_master = NULL;
}
}
static ErlDrvSSizeT
wxe_driver_control(ErlDrvData handle, unsigned op,
char* buf, ErlDrvSizeT count,
char** res, ErlDrvSizeT res_size)
{
wxe_data *sd = ((wxe_data *)handle);
push_command(op,buf,count,sd);
return 0;
}
static ErlDrvSSizeT
wxe_driver_call(ErlDrvData handle, unsigned int command,
char *buf, ErlDrvSizeT len,
char **res, ErlDrvSizeT rlen, unsigned int *flags)
{
wxe_data *sd = ((wxe_data *)handle);
if(command == WXE_DEBUG_DRIVER) {
if(*buf)
wxe_debug = 1;
else
wxe_debug = 0;
} else {
meta_command(PING_PORT,sd);
}
if (len > rlen)
*res = driver_alloc(len);
memcpy((void *) *res, (void *) buf, len);
return len;
}
void wxe_process_died(ErlDrvData handle, ErlDrvMonitor *monitor)
{
/* Callback is active for the dead process */
wxe_data *sd = ((wxe_data *)handle);
push_command(WXE_CB_DIED,NULL,0,sd);
/* ErlDrvTermData pid; */
/* pid = driver_get_monitored_process(sd->port_handle, monitor); */
/* fprintf(stderr, "Process died %d \r\n", (int) pid); */
}
static void
standard_outputv(ErlDrvData drv_data, ErlIOVec* ev)
{
wxe_data* sd = (wxe_data *) drv_data;
WXEBinRef * binref = NULL;
ErlDrvBinary* bin;
int i, max;
for(i = 0; i < sd->max_bins; i++) {
if(sd->bin[i].from == 0) {
binref = &sd->bin[i];
break;
}
}
if(binref == NULL) { /* realloc */
max = sd->max_bins + DEF_BINS;
sd->bin = driver_realloc(sd->bin, sizeof(WXEBinRef)*max);
for(i=sd->max_bins; i < max; i++) {
sd->bin[i].from = 0;
}
binref = &sd->bin[sd->max_bins];
sd->max_bins = max;
}
if(ev->size > 0) {
assert(ev->vsize == 2 && ev->iov[0].iov_len == 0
&& "erts changed how the ErlIOVec is structured for outputv");
binref->from = driver_caller(sd->port_handle);
binref->size = ev->iov[1].iov_len;
if(ev->binv[1]) {
binref->base = ev->iov[1].iov_base;
bin = ev->binv[1];
driver_binary_inc_refc(bin); /* Otherwise it could get deallocated */
} else {
bin = driver_alloc_binary(ev->iov[1].iov_len);
memcpy(bin->orig_bytes, ev->iov[1].iov_base, ev->iov[1].iov_len);
binref->base = bin->orig_bytes;
}
binref->bin = bin;
} else { /* Empty binary (becomes NULL) */
binref->base = NULL;
binref->size = 0;
binref->from = driver_caller(sd->port_handle);
binref->bin = NULL;
}
}
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