UserProcessScheduler.inl

Go to the documentation of this file.

/* ========================================
 
  Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
 
  FILE: UserProcessScheduler.inl
  PURPOSE: Low level/Ring-3 process scheduler.
 
======================================== */

 
#ifndef INC_PROCESS_SCHEDULER_H
#include <KernelKit/UserProcessScheduler.h>
#endif  // INC_PROCESS_SCHEDULER_H
 
namespace Kernel {
/***********************************************************************************/
/***********************************************************************************/
 
template <typename T>
BOOL USER_PROCESS::Delete(ErrorOr<T*> ptr) {
  if (!ptr) return No;
 
  if (!this->HeapTree) {
    kout << "USER_PROCESS: Heap is empty.\r";
    return No;
  }
 
  PROCESS_HEAP_TREE<VoidPtr>* entry = this->HeapTree;
 
  while (entry != nullptr) {
    if (entry->Entry == ptr.Leak().Leak()) {
      this->UsedMemory -= entry->EntrySize;
 
#ifdef __NE_AMD64__
      auto page_dir = hal_read_cr3();
 
      hal_write_cr3(this->VMRegister);
      auto ret = mm_free_ptr(entry->Entry);
      hal_write_cr3(page_dir);
#else
      auto ret = mm_free_ptr(ptr.Leak().Leak());
#endif
 
      return ret == kErrorSuccess;
    }
 
    entry = entry->Next;
  }
 
  kout << "USER_PROCESS: Trying to free a pointer which doesn't exist.\r";
 
  this->Crash();
 
  return No;
}
}  // namespace Kernel