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Initial process waiting/waking

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Processes can now wait on signals/children/time. There is no clock
currently so "time" is just a monotonically increating tick count. Added
a SLEEP syscall to test this waiting/waking.
This commit is contained in:
Justin C. Miller
2018-09-16 12:22:52 -07:00
parent f4e7eaeb40
commit 482b9f50fc
7 changed files with 259 additions and 48 deletions
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19
src/kernel/syscall.cpp
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@@ -2,6 +2,7 @@
#include "cpu.h"
#include "debug.h"
#include "msr.h"
#include "process.h"
#include "scheduler.h"
#include "syscall.h"
@@ -62,12 +63,22 @@ syscall_dispatch(addr_t return_rsp, const cpu_state &regs)
auto &s = scheduler::get();
auto *p = s.current();
p->flags -= process_flags::ready;
//log::debug(logs::task, "Pausing process %d, flags: %08x", p->pid, p->flags);
p->wait_on_signal(-1ull);
cons->printf("\nReceived PAUSE syscall\n");
return_rsp = s.tick(return_rsp);
//log::debug(logs::task, "Switching to stack %016lx", return_rsp);
cons->printf("\nDONE WITH PAUSE syscall\n");
cons->set_color();
}
break;
case syscall::sleep:
{
cons->set_color(11);
auto &s = scheduler::get();
auto *p = s.current();
p->wait_on_time(regs.rbx);
cons->printf("\nReceived SLEEP syscall\n");
return_rsp = s.tick(return_rsp);
cons->set_color();
}
break;