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[kernel] Create process kernel object

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Re-implent the concept of processes as separate from threads, and as a
kobject API object. Also improve scheduler::prune which was doing some
unnecessary iterations.
This commit is contained in:
Justin C. Miller
2020-07-19 16:47:18 -07:00
parent f4cbb9498f
commit ef5c333030
8 changed files with 207 additions and 80 deletions
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23
src/kernel/objects/thread.h
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@@ -5,9 +5,8 @@
#include "kutil/linked_list.h"
#include "objects/kobject.h"
using priority_t = uint8_t;
struct page_table;
class process;
struct TCB
{
@@ -18,7 +17,7 @@ struct TCB
uintptr_t rsp3;
page_table *pml4;
priority_t priority;
uint8_t priority;
// note: 3 bytes padding
// TODO: move state into TCB?
@@ -48,11 +47,6 @@ public:
none = 0x00
};
/// Constructor.
/// \arg pml4 Root page table for the thread's owning process
/// \arg pri Initial priority level of this thread
thread(page_table *pml4, priority_t pri);
/// Get the `ready` state of the thread.
/// \returns True if the thread is ready to execute.
inline bool ready() const { return has_state(state::ready); }
@@ -66,11 +60,11 @@ public:
inline bool constant() const { return has_state(state::constant); }
/// Get the thread priority.
inline priority_t priority() const { return m_tcb.priority; }
inline uint8_t priority() const { return m_tcb.priority; }
/// Set the thread priority.
/// \arg p The new thread priority
inline void set_priority(priority_t p) { if (!constant()) m_tcb.priority = p; }
inline void set_priority(uint8_t p) { if (!constant()) m_tcb.priority = p; }
/// Block the thread, waiting on the given object's signals.
/// \arg obj Object to wait on
@@ -110,6 +104,7 @@ public:
}
inline tcb_node * tcb() { return &m_tcb; }
inline process & parent() { return m_parent; }
/// Terminate this thread.
/// \arg code The return code to exit with.
@@ -119,6 +114,14 @@ private:
thread() = delete;
thread(const thread &other) = delete;
thread(const thread &&other) = delete;
friend class process;
/// Constructor.
/// \arg p The process which owns this thread
/// \arg pri Initial priority level of this thread
thread(process &parent, uint8_t pri);
process &m_parent;
tcb_node m_tcb;