63 lines
1.3 KiB
C++
63 lines
1.3 KiB
C++
#include "scheduler/process.h"
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#include "debug/debug.h"
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#include "memory/paging_util.h"
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#include "memory/physical_memory.h"
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#include "scheduler/scheduler.h"
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#include "scheduler/thread.h"
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namespace {
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static uint64_t gNextId = 1;
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}
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Process* Process::RootProcess() {
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uint64_t pml4_addr = 0;
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asm volatile("mov %%cr3, %0;" : "=r"(pml4_addr));
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Process* proc = new Process(0, pml4_addr);
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proc->thread_list_front_ = new ThreadEntry{
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.thread = Thread::RootThread(proc),
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.next = nullptr,
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};
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proc->next_thread_id_ = 1;
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return proc;
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}
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Process::Process() : id_(gNextId++) {
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cr3_ = phys_mem::AllocatePage();
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InitializePml4(cr3_);
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CreateThread();
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}
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void Process::CreateThread() {
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Thread* thread = new Thread(this, next_thread_id_++);
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ThreadEntry* tentry = new ThreadEntry{
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.thread = thread,
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.next = nullptr,
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};
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if (thread_list_front_ == nullptr) {
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thread_list_front_ = tentry;
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} else {
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ThreadEntry* entry = thread_list_front_;
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while (entry->next != nullptr) {
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entry = entry->next;
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}
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entry->next = tentry;
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}
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sched::EnqueueThread(thread);
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}
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Thread* Process::GetThread(uint64_t tid) {
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ThreadEntry* entry = thread_list_front_;
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while (entry != nullptr) {
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if (entry->thread->tid() == tid) {
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return entry->thread;
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}
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}
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panic("Bad thread access.");
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return nullptr;
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}
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