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#include "ProcessTableModel.h"
#include <fcntl.h>
#include <stdio.h>
#include <pwd.h>
enum Column {
Icon = 0,
Name,
CPU,
State,
Priority,
User,
PID,
Linear,
Physical,
__Count
};
ProcessTableModel::ProcessTableModel()
{
setpwent();
while (auto* passwd = getpwent())
m_usernames.set(passwd->pw_uid, passwd->pw_name);
endpwent();
m_generic_process_icon = GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, "/res/icons/gear16.rgb", { 16, 16 });
ASSERT(m_generic_process_icon);
}
ProcessTableModel::~ProcessTableModel()
{
}
int ProcessTableModel::row_count() const
{
return m_processes.size();
}
int ProcessTableModel::column_count() const
{
return Column::__Count;
}
String ProcessTableModel::column_name(int column) const
{
switch (column) {
case Column::Icon: return "";
case Column::PID: return "PID";
case Column::State: return "State";
case Column::User: return "User";
case Column::Priority: return "Priority";
case Column::Linear: return "Linear";
case Column::Physical: return "Physical";
case Column::CPU: return "CPU";
case Column::Name: return "Name";
default: ASSERT_NOT_REACHED();
}
}
GTableModel::ColumnMetadata ProcessTableModel::column_metadata(int column) const
{
switch (column) {
case Column::Icon: return { 16, TextAlignment::CenterLeft };
case Column::PID: return { 25, TextAlignment::CenterRight };
case Column::State: return { 75, TextAlignment::CenterLeft };
case Column::Priority: return { 65, TextAlignment::CenterLeft };
case Column::User: return { 50, TextAlignment::CenterLeft };
case Column::Linear: return { 65, TextAlignment::CenterRight };
case Column::Physical: return { 65, TextAlignment::CenterRight };
case Column::CPU: return { 25, TextAlignment::CenterRight };
case Column::Name: return { 140, TextAlignment::CenterLeft };
default: ASSERT_NOT_REACHED();
}
}
GModelIndex ProcessTableModel::selected_index() const
{
return { m_selected_row, 0 };
}
void ProcessTableModel::set_selected_index(GModelIndex index)
{
if (!index.is_valid()) {
m_selected_row = -1;
return;
}
if (index.row() >= 0 && index.row() < m_pids.size())
m_selected_row = index.row();
}
static String pretty_byte_size(size_t size)
{
return String::format("%uK", size / 1024);
}
GVariant ProcessTableModel::data(int row, int column) const
{
ASSERT(is_valid({ row, column }));
auto it = m_processes.find(m_pids[row]);
auto& process = *(*it).value;
switch (column) {
case Column::Icon: return *m_generic_process_icon;
case Column::PID: return process.current_state.pid;
case Column::State: return process.current_state.state;
case Column::User: return process.current_state.user;
case Column::Priority: return process.current_state.priority;
case Column::Linear: return pretty_byte_size(process.current_state.linear);
case Column::Physical: return pretty_byte_size(process.current_state.physical);
case Column::CPU: return process.current_state.cpu_percent;
case Column::Name: return process.current_state.name;
}
ASSERT_NOT_REACHED();
}
void ProcessTableModel::update()
{
FILE* fp = fopen("/proc/all", "r");
if (!fp) {
perror("failed to open /proc/all");
exit(1);
}
unsigned last_sum_nsched = 0;
for (auto& it : m_processes)
last_sum_nsched += it.value->current_state.nsched;
HashTable<pid_t> live_pids;
unsigned sum_nsched = 0;
for (;;) {
char buf[BUFSIZ];
char* ptr = fgets(buf, sizeof(buf), fp);
if (!ptr)
break;
auto parts = String(buf, Chomp).split(',');
if (parts.size() < 17)
break;
bool ok;
pid_t pid = parts[0].to_uint(ok);
ASSERT(ok);
unsigned nsched = parts[1].to_uint(ok);
ASSERT(ok);
ProcessState state;
state.pid = pid;
state.nsched = nsched;
unsigned uid = parts[5].to_uint(ok);
ASSERT(ok);
{
auto it = m_usernames.find((uid_t)uid);
if (it != m_usernames.end())
state.user = String::format("%s", (*it).value.characters());
else
state.user = String::format("%u", uid);
}
state.priority = parts[16];
state.state = parts[7];
state.name = parts[11];
state.linear = parts[12].to_uint(ok);
ASSERT(ok);
state.physical = parts[13].to_uint(ok);
ASSERT(ok);
sum_nsched += nsched;
if (pid == 0)
continue;
{
auto it = m_processes.find(pid);
if (it == m_processes.end())
m_processes.set(pid, make<Process>());
}
auto it = m_processes.find(pid);
ASSERT(it != m_processes.end());
(*it).value->previous_state = (*it).value->current_state;
(*it).value->current_state = state;
live_pids.set(pid);
}
int rc = fclose(fp);
ASSERT(rc == 0);
m_pids.clear();
Vector<pid_t> pids_to_remove;
for (auto& it : m_processes) {
if (!live_pids.contains(it.key)) {
pids_to_remove.append(it.key);
continue;
}
auto& process = *it.value;
dword nsched_diff = process.current_state.nsched - process.previous_state.nsched;
process.current_state.cpu_percent = ((float)nsched_diff * 100) / (float)(sum_nsched - last_sum_nsched);
m_pids.append(it.key);
}
for (auto pid : pids_to_remove)
m_processes.remove(pid);
did_update();
}
pid_t ProcessTableModel::selected_pid() const
{
if (m_selected_row == -1)
return -1;
return m_pids[m_selected_row];
}
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