Justin C. Miller
87b0a93d32
Instead of making every callsite that may make a thread do a blocking operation also invoke the scheduler, move that logic into thread implementation - if the thread is blocking and is the current thread, call schedule(). Related changes in this commit: - Also make exiting threads and processes call the scheduler when blocking. - Threads start blocked, and get automatically added to the scheduler's blocked list.
97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
#pragma once
|
|
/// \file process.h
|
|
/// Definition of process kobject types
|
|
|
|
#include "kutil/map.h"
|
|
#include "kutil/vector.h"
|
|
#include "objects/kobject.h"
|
|
#include "page_table.h"
|
|
#include "vm_space.h"
|
|
|
|
class process :
|
|
public kobject
|
|
{
|
|
public:
|
|
/// Top of memory area where thread stacks are allocated
|
|
constexpr static uintptr_t stacks_top = 0x0000800000000000;
|
|
|
|
/// Size of userspace thread stacks
|
|
constexpr static size_t stack_size = 0x4000;
|
|
|
|
/// Value that represents default priority
|
|
constexpr static uint8_t default_pri = 0xff;
|
|
|
|
/// Constructor.
|
|
process();
|
|
|
|
/// Destructor.
|
|
virtual ~process();
|
|
|
|
static constexpr kobject::type type = kobject::type::process;
|
|
|
|
/// Get the currently executing process.
|
|
static process & current();
|
|
|
|
/// Terminate this process.
|
|
/// \arg code The return code to exit with.
|
|
void exit(unsigned code);
|
|
|
|
/// Update internal bookkeeping about threads.
|
|
void update();
|
|
|
|
/// Get the process' virtual memory space
|
|
vm_space & space() { return m_space; }
|
|
|
|
/// Create a new thread in this process
|
|
/// \args priority The new thread's scheduling priority
|
|
/// \args user If true, create a userspace stack for this thread
|
|
/// \returns The newly created thread object
|
|
thread * create_thread(uint8_t priorty = default_pri, bool user = true);
|
|
|
|
/// Start tracking an object with a handle.
|
|
/// \args obj The object this handle refers to
|
|
/// \returns The new handle for this object
|
|
j6_handle_t add_handle(kobject *obj);
|
|
|
|
/// Stop tracking an object with a handle.
|
|
/// \args handle The handle that refers to the object
|
|
/// \returns True if the handle was removed
|
|
bool remove_handle(j6_handle_t handle);
|
|
|
|
/// Lookup an object for a handle
|
|
/// \args handle The handle to the object
|
|
/// \returns Pointer to the object, or null if not found
|
|
kobject * lookup_handle(j6_handle_t handle);
|
|
|
|
/// Inform the process of an exited thread
|
|
/// \args th The thread which has exited
|
|
/// \returns True if this thread ending has ended the process
|
|
bool thread_exited(thread *th);
|
|
|
|
/// Get the process object that owns kernel threads and the
|
|
/// kernel address space
|
|
static process & kernel_process();
|
|
|
|
/// Create the special kernel process that owns kernel tasks
|
|
/// \arg pml4 The kernel-only pml4
|
|
/// \returns The kernel process object
|
|
static process * create_kernel_process(page_table *pml4);
|
|
|
|
private:
|
|
// This constructor is called by create_kernel_process
|
|
process(page_table *kpml4);
|
|
|
|
uint32_t m_return_code;
|
|
|
|
vm_space m_space;
|
|
|
|
kutil::vector<thread*> m_threads;
|
|
kutil::map<j6_handle_t, kobject*> m_handles;
|
|
j6_handle_t m_next_handle;
|
|
|
|
enum class state : uint8_t { running, exited };
|
|
state m_state;
|
|
|
|
static kutil::vector<process*> s_processes;
|
|
};
|