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/*
* command.c - Command construction and execution
*
* Written 2001-2003 by Werner Almesberger
* Copyright 2001 EPFL-ICA, Network Robots, Werner Almesberger
* Copyright 2003 Werner Almesberger
*/
#include <stdio.h>
#include <stdlib.h>
#include <memutil.h>
#include "tckernel.h"
#include "tcsim.h"
#include "timer.h"
#include "command.h"
struct every {
struct jiffval interval;
struct jiffval until;
struct timer_list timer;
struct command *cmd;
};
int terminating = 0;
static void do_every(unsigned long data)
{
struct every *dsc = (struct every *) data;
int stop;
stop = jiffval_cmp(now,dsc->until) > 0;
if (!stop) cmd_run(dsc->cmd);
if (stop || terminating) {
cmd_free(dsc->cmd);
free(dsc);
return;
}
dsc->timer.expires = now.jiffies+dsc->interval.jiffies;
dsc->timer.expires_ujiffies = now.ujiffies+dsc->interval.ujiffies;
if (dsc->timer.expires_ujiffies > 999999) {
dsc->timer.expires++;
dsc->timer.expires_ujiffies -= 1000000;
}
add_hires_timer(&dsc->timer);
}
static void add_every(struct jiffval interval,struct jiffval until,
struct command *cmd)
{
struct every *dsc;
dsc = alloc_t(struct every);
dsc->cmd = cmd;
dsc->interval = interval;
dsc->until = until;
dsc->timer.function = do_every;
dsc->timer.data = (unsigned long) dsc;
do_every((unsigned long) dsc);
}
static struct command *cmd_alloc(enum command_type type)
{
struct command *cmd;
cmd = alloc_t(struct command);
cmd->type = type;
cmd->ref = 1;
return cmd;
}
struct command *cmd_clone(struct command *cmd)
{
cmd->ref++;
return cmd;
}
struct command *cmd_tc(int argc,char **argv)
{
struct command *cmd;
char **in,**out;
cmd = cmd_alloc(ct_tc);
cmd->u.tc.argc = argc;
cmd->u.tc.argv = out = alloc(sizeof(char *)*(argc+1));
for (in = argv; in-argv < argc; in++) *out++ = stralloc(*in);
*out = NULL;
return cmd;
}
struct command *cmd_send(struct net_device *dev,void *buf,int len,
struct attributes attr)
{
struct command *cmd;
cmd = cmd_alloc(ct_send);
cmd->u.send.dev = dev;
cmd->u.send.buf = alloc(len);
memcpy(cmd->u.send.buf,buf,len);
cmd->u.send.len = len;
cmd->u.send.attr = attr;
return cmd;
}
struct command *cmd_poll(struct net_device *dev)
{
struct command *cmd;
cmd = cmd_alloc(ct_poll);
cmd->u.poll.dev = dev;
return cmd;
}
struct command *cmd_every(struct jiffval interval,struct jiffval until,
struct command *command)
{
struct command *cmd;
cmd = cmd_alloc(ct_every);
cmd->u.every.interval = interval;
cmd->u.every.until = until;
cmd->u.every.cmd = command;
return cmd;
}
struct command *cmd_echo(char *msg)
{
struct command *cmd;
cmd = cmd_alloc(ct_echo);
cmd->u.echo.msg = msg;
return cmd;
}
void cmd_run(struct command *cmd)
{
switch (cmd->type) {
case ct_tc:
if (verbose > 0) {
int i;
print_time(now);
printf(" T :");
for (i = 1; i < cmd->u.tc.argc; i++)
printf(" %s",cmd->u.tc.argv[i]);
printf("\n");
}
set_timer_resolution();
reset_tc();
(void) tc_main(cmd->u.tc.argc,cmd->u.tc.argv);
break;
case ct_send:
kernel_enqueue(cmd->u.send.dev,cmd->u.send.buf,cmd->u.send.len,
cmd->u.send.attr);
kernel_poll(cmd->u.send.dev,0);
break;
case ct_poll:
kernel_poll(cmd->u.poll.dev,1);
break;
case ct_every:
add_every(cmd->u.every.interval,cmd->u.every.until,
cmd_clone(cmd->u.every.cmd));
break;
case ct_echo:
if (verbose >= 0) {
print_time(now);
if (cmd->u.echo.msg) printf(" * : %s\n",cmd->u.echo.msg);
else printf(" * :\n");
}
break;
default:
abort();
}
}
void cmd_free(struct command *cmd)
{
char **arg;
if (--cmd->ref) return;
switch (cmd->type) {
case ct_tc:
for (arg = cmd->u.tc.argv; *arg; arg++) free(*arg);
free(cmd->u.tc.argv);
break;
case ct_send:
free(cmd->u.send.buf);
break;
case ct_poll:
break;
case ct_every:
cmd_free(cmd->u.every.cmd);
break;
case ct_echo:
if (cmd->u.echo.msg) free(cmd->u.echo.msg);
break;
default:
abort();
}
free(cmd);
}
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