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[kernel] Add thead kobject class

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Add the thread kernel API object and move the scheduler to use threads
instead of processes for scheduling and task switching.
This commit is contained in:
Justin C. Miller
2020-07-12 16:03:46 -07:00
parent 8687fe3786
commit 794c86f9b4
16 changed files with 504 additions and 230 deletions
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29
src/kernel/syscalls/process.cpp
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@@ -10,16 +10,18 @@ j6_status_t
process_exit(int64_t status)
{
auto &s = scheduler::get();
auto *p = s.current();
log::debug(logs::syscall, "Process %d exiting with code %d", p->pid, status);
TCB *tcb = s.current();
thread *th = tcb->thread_data;
log::debug(logs::syscall, "Thread %llx exiting with code %d", th->koid(), status);
p->exit(status);
th->exit(status);
s.schedule();
log::error(logs::syscall, "returned to exit syscall");
return j6_err_unexpected;
}
/*
j6_status_t
process_fork(pid_t *pid)
{
@@ -54,6 +56,7 @@ process_getpid(pid_t *pid)
*pid = p->pid;
return j6_status_ok;
}
*/
j6_status_t
process_log(const char *message)
@@ -63,17 +66,22 @@ process_log(const char *message)
}
auto &s = scheduler::get();
auto *p = s.current();
log::info(logs::syscall, "Message[%d]: %s", p->pid, message);
TCB *tcb = s.current();
thread *th = tcb->thread_data;
log::info(logs::syscall, "Message[%llx]: %s", th->koid(), message);
return j6_status_ok;
}
j6_status_t process_fork(uint32_t *pid) { *pid = 5; return process_log("CALLED FORK"); }
j6_status_t process_getpid(uint32_t *pid) { *pid = 0; return process_log("CALLED GETPID"); }
j6_status_t
process_pause()
{
auto &s = scheduler::get();
auto *p = s.current();
p->wait_on_signal(-1ull);
TCB *tcb = s.current();
thread *th = tcb->thread_data;
th->wait_on_signals(th, -1ull);
s.schedule();
return j6_status_ok;
}
@@ -82,10 +90,11 @@ j6_status_t
process_sleep(uint64_t til)
{
auto &s = scheduler::get();
auto *p = s.current();
log::debug(logs::syscall, "Process %d sleeping until %llu", p->pid, til);
TCB *tcb = s.current();
thread *th = tcb->thread_data;
log::debug(logs::syscall, "Thread %llx sleeping until %llu", th->koid(), til);
p->wait_on_time(til);
th->wait_on_time(til);
s.schedule();
return j6_status_ok;
}