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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* 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.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 <sys/types.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/sched.h>
#include <vm/dynalloc.h>
#include <string.h>
static size_t nthreads = 0;
/*
* Fork1 - fork and direct a thread to 'ip'
*
* @cur: Current process.
* @flags: Flags to set.
* @ip: Location for new thread to start at.
* @newprocp: Will contain new thread if not NULL.
*/
int
fork1(struct proc *cur, int flags, void(*ip)(void), struct proc **newprocp)
{
struct proc *newproc;
int status = 0;
newproc = dynalloc(sizeof(*newproc));
if (newproc == NULL)
return -ENOMEM;
/*
* We want to zero the proc to ensure it is in known
* state. We then want to initialize machine dependent
* fields.
*/
memset(newproc, 0, sizeof(*newproc));
status = md_td_init(newproc, cur, (uintptr_t)ip);
if (status != 0)
goto done;
/* Set proc output if we can */
if (newprocp != NULL)
*newprocp = newproc;
newproc->pid = nthreads++;
sched_enqueue_td(newproc);
done:
if (status != 0)
dynfree(newproc);
return status;
}
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