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#include "Process.class.h"
#include <TaskManager/Task.ns.h>
#include <MemoryManager/PhysMem.ns.h>
#include <VFS/File.class.h>
#include <Linker/Binary.proto.h>
#include <Process.iface.h>
namespace Mem {
extern Heap kheap;
}
call_t Process::m_callTable[] = {
CALL0(PRIF_EXIT, &Process::exitSC),
CALL1(PRIF_ALLOCPAGE, &Process::allocPageSC),
CALL1(PRIF_FREEPAGE, &Process::freePageSC),
CALL0(0, 0)
};
Process::Process() : Ressource(PRIF_OBJTYPE, m_callTable) { //Private constructor, does nothing
}
Process* Process::createKernel(String cmdline, VirtualTerminal *vt) {
Process* p = new Process();
p->m_pid = 0;
p->m_cmdline = cmdline;
p->m_retval = 0;
p->m_state = P_RUNNING;
p->m_pagedir = kernelPageDirectory;
p->m_uid = 0;
p->m_userHeap = &Mem::kheap;
p->m_vt = vt;
Thread* t = new Thread();
t->m_process = p;
t->m_state = T_RUNNING;
t->m_isKernel = true;
t->m_kernelStack.addr = 0;
t->m_kernelStack.size = 0;
p->registerThread(t);
Task::registerProcess(p);
Task::registerThread(t);
return p;
}
Process* Process::run(String filename, FSNode* cwd, u32int uid) {
File file(filename, FM_READ, cwd);
if (!file.valid()) return 0;
Binary* b = Binary::load(file);
if (b == 0) return 0;
Process* p = new Process(filename, uid);
thread_entry_t e = b->toProcess(p);
delete b;
if (e != 0) {
new Thread(p, e, 0);
return p;
} else {
delete p;
return 0;
}
}
Process::Process(String cmdline, u32int uid) : Ressource(PRIF_OBJTYPE, m_callTable) {
m_pid = Task::nextPid();
m_cmdline = cmdline;
m_retval = 0;
m_state = P_STARTING;
m_uid = uid;
m_vt = Task::currProcess()->getVirtualTerminal();
m_fileDescriptors = 0;
//Create page directory and user heap
m_pagedir = new PageDirectory(kernelPageDirectory);
m_pagedir->switchTo();
m_userHeap = new Heap();
u32int heapIdxSize = PhysMem::total() * 16 + 0x10000;
m_userHeap->create(USERHEAPSTART, USERHEAPINITSIZE + heapIdxSize, heapIdxSize, m_pagedir, true, true);
}
Process::~Process() {
exit(); //Kill all threads
delete m_pagedir;
delete m_userHeap;
}
void Process::start() {
if (m_state == P_STARTING) m_state = P_RUNNING;
}
void Process::exit() {
for (u32int i = 0; i < m_threads.size(); i++) {
delete m_threads[i];
}
m_threads.clear();
for (SimpleList<File*> *iter = m_fileDescriptors; iter != 0; iter = iter->next()) {
iter->v()->close(false);
delete iter->v();
}
if (m_fileDescriptors != 0) delete m_fileDescriptors; //Will recursively delete whole list
m_state = P_FINISHED;
}
void Process::registerThread(Thread* t) {
if (m_state != P_FINISHED)
m_threads.push(t);
}
void Process::threadFinishes(Thread* thread, u32int retval) {
// If it is the main thread of the process, or if it pagefaulted
if (thread == m_threads[0] or retval == E_PAGEFAULT or retval == E_EXIT) {
exit();
} else {
//Simply unregister thread
for (u32int i = 0; i < m_threads.size(); i++) {
if (m_threads[i] == thread) {
m_threads[i] = m_threads.back();
m_threads.pop();
break;
}
}
delete thread;
}
}
void Process::registerFileDescriptor(File* fd) {
m_fileDescriptors = m_fileDescriptors->cons(fd);
}
void Process::unregisterFileDescriptor(File* fd) {
m_fileDescriptors = m_fileDescriptors->removeOnce(fd);
}
PageDirectory* Process::getPagedir() {
return m_pagedir;
}
VirtualTerminal* Process::getVirtualTerminal() {
return m_vt;
}
void Process::setVirtualTerminal(VirtualTerminal* vt) {
m_vt = vt;
}
u32int Process::exitSC() {
if (Task::currProcess() != this) return 1;
Task::currentThreadExits(E_EXIT);
return 0;
}
u32int Process::allocPageSC(u32int pos) {
if (Task::currProcess() != this) return 1;
if ((pos & 0x00000FFF) != 0) pos = (pos & 0xFFFFF000) + 0x1000;
if (pos >= 0xC0000000) return 1;
m_pagedir->allocFrame(pos, true, true);
return 0;
}
u32int Process::freePageSC(u32int pos) {
if (Task::currProcess() != this) return 1;
if ((pos & 0x00000FFF) != 0) pos = (pos & 0xFFFFF000) + 0x1000;
if (pos >= 0xC0000000) return 1;
m_pagedir->freeFrame(pos);
return 0;
}
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