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wip: fork()

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0x35c
2025-11-12 15:07:36 +01:00
parent 02d196fab5
commit 34aa0f0eb4
9 changed files with 115 additions and 28 deletions
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27
src/multitasking/thread.c
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@ -2,17 +2,18 @@
#include "alloc.h"
#include "assert.h"
#include "interrupts.h"
#include "list.h"
#include "memory.h"
#include "process.h"
#include "string.h"
#include "thread.h"
struct tcb *create_thread(struct pcb *process, void (*entry)(void))
{
static uint32_t tid = 1;
struct tcb *new_tcb = vmalloc(sizeof(struct tcb));
if (!new_tcb)
return NULL;
new_tcb->tid = tid++;
new_tcb->tid = process->tid++;
new_tcb->esp0 = alloc_pages(STACK_SIZE, NULL);
if (!new_tcb->esp0) {
@ -40,18 +41,26 @@ struct tcb *create_thread(struct pcb *process, void (*entry)(void))
*(--stack) = 0; // ESI
*(--stack) = 0; // EDI
*(--stack) = 0x10; // kernel DS
new_tcb->esp = stack;
new_tcb->process = process;
new_tcb->next = NULL;
new_tcb->state = NEW;
struct list *new_node = vmalloc(sizeof(struct list));
if (!new_node) {
free_pages(new_tcb->esp0, STACK_SIZE);
vfree(new_tcb);
return NULL;
}
new_node->content = new_tcb;
new_node->next = NULL;
if (process->thread_list == NULL) {
process->thread_list = new_tcb;
process->thread_list = new_node;
} else {
struct tcb *it = process->thread_list;
struct list *it = process->thread_list;
while (it->next)
it = it->next;
it->next = new_tcb;
it->next = new_node;
}
return new_tcb;
@ -60,10 +69,12 @@ struct tcb *create_thread(struct pcb *process, void (*entry)(void))
void delete_thread(struct tcb *thread)
{
vfree(thread->esp0);
struct tcb *it = thread->process->thread_list;
struct list *it = thread->process->thread_list;
assert(it);
while (it->next != thread)
while (it->next && it->next->content != thread)
it = it->next;
struct list *to_free = it;
it->next = it->next->next;
vfree(to_free);
vfree(thread);
}