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/**
* @file
*
* @ingroup rtems_bsd_rtems
*
* @brief TODO.
*/
/*
* Copyright (c) 2013 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <machine/rtems-bsd-kernel-space.h>
#include <machine/rtems-bsd-thread.h>
#include <rtems/bsd/sys/param.h>
#include <rtems/bsd/sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <rtems/bsd/sys/lock.h>
#include <sys/mutex.h>
#include <setjmp.h>
#include <stdlib.h>
struct rtems_bsd_program_control {
void *context;
int exit_code;
const char *name;
jmp_buf return_context;
};
int
rtems_bsd_program_call(const char *name, int (*prog)(void *), void *context)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
int exit_code = EXIT_FAILURE;
if (td != NULL) {
struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl;
if (prog_ctrl == NULL) {
prog_ctrl = malloc(sizeof(*prog_ctrl), M_TEMP, 0);
if (prog_ctrl != NULL) {
td->td_prog_ctrl = prog_ctrl;
prog_ctrl->context = context;
prog_ctrl->name = name;
prog_ctrl->exit_code = exit_code;
if (setjmp(prog_ctrl->return_context) == 0) {
exit_code = (*prog)(context);
} else {
exit_code = prog_ctrl->exit_code;
}
td->td_prog_ctrl = NULL;
free(prog_ctrl, M_TEMP);
} else {
errno = ENOMEM;
}
} else {
panic("unexpected BSD program state");
}
} else {
errno = ENOMEM;
}
return exit_code;
}
void
rtems_bsd_program_exit(int exit_code)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
if (td != NULL) {
struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl;
if (prog_ctrl != NULL) {
prog_ctrl->exit_code = exit_code;
longjmp(prog_ctrl->return_context, 1);
}
}
panic("unexpected BSD program exit");
}
const char *
rtems_bsd_program_get_name(void)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
const char *name = "?";
if (td != NULL) {
struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl;
if (prog_ctrl != NULL) {
name = prog_ctrl->name;
}
}
return name;
}
void *
rtems_bsd_program_get_context(void)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
void *context = NULL;
if (td != NULL) {
struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl;
if (prog_ctrl != NULL) {
context = prog_ctrl->context;
}
}
return context;
}
struct main_context {
int argc;
char **argv;
int (*main)(int, char **);
};
static int
call_main(void *ctx)
{
const struct main_context *mc = ctx;
return (*mc->main)(mc->argc, mc->argv);
}
int
rtems_bsd_program_call_main(const char *name, int (*main)(int, char **),
int argc, char **argv)
{
struct main_context mc = {
.argc = argc,
.argv = argv,
.main = main
};
int exit_code;
if (argv[argc] == NULL) {
exit_code = rtems_bsd_program_call(name, call_main, &mc);
} else {
errno = EFAULT;
exit_code = EXIT_FAILURE;
}
return exit_code;
}
static struct mtx program_mtx;
MTX_SYSINIT(rtems_bsd_program, &program_mtx, "BSD program", MTX_DEF);
void
rtems_bsd_program_lock(void)
{
mtx_lock(&program_mtx);
}
void
rtems_bsd_program_unlock(void)
{
mtx_unlock(&program_mtx);
}
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