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[kernel] Use map for process handles

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Replace linearly-indexed vector of handles with new kutil::map. Also
provide thread::current() and process::current() accessors so that every
syscall doesn't need to include the scheduler to deduce the current
process.
This commit is contained in:
Justin C. Miller
2020-09-13 15:54:47 -07:00
parent 245f260d67
commit 9dee5e4138
6 changed files with 43 additions and 43 deletions
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29
src/kernel/objects/process.cpp
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@@ -1,5 +1,6 @@
#include "j6/signals.h"
#include "kutil/assert.h"
#include "cpu.h"
#include "objects/process.h"
#include "objects/thread.h"
#include "page_manager.h"
@@ -9,6 +10,7 @@ kutil::vector<process*> process::s_processes;
process::process(page_table *pml4) :
kobject(kobject::type::process),
m_pml4(pml4),
m_next_handle(0),
m_state(state::running)
{
s_processes.append(this);
@@ -19,6 +21,12 @@ process::~process()
s_processes.remove_swap(this);
}
process &
process::current()
{
return *bsp_cpu_data.p;
}
void
process::exit(unsigned code)
{
@@ -104,28 +112,21 @@ process::add_handle(kobject *obj)
return j6_handle_invalid;
obj->handle_retain();
size_t len = m_handles.count();
m_handles.append(obj);
return static_cast<j6_handle_t>(len);
j6_handle_t handle = m_next_handle++;
m_handles.insert(handle, obj);
return handle;
}
bool
process::remove_handle(j6_handle_t handle)
{
if (handle < m_handles.count()) {
kobject *obj = m_handles[handle];
m_handles[handle] = nullptr;
if (obj)
obj->handle_release();
return true;
}
return false;
kobject *obj = m_handles.find(handle);
if (obj) obj->handle_release();
return m_handles.erase(handle);
}
kobject *
process::lookup_handle(j6_handle_t handle)
{
if (handle < m_handles.count())
return m_handles[handle];
return nullptr;
return m_handles.find(handle);
}