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loosend restriction imposed by #final. a kernel class can inherit from a final class.

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added an experimental class _KernelProcess for process management
This commit is contained in:
hyunghwan.chung 2019-09-08 15:25:21 +00:00
parent ff99686c97
commit b9199faaf6
6 changed files with 58 additions and 28 deletions
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6
moo/kernel/Process.moo
View File

@ -77,6 +77,12 @@ class(#pointer,#final,#limited) Process(Object)
}
}
class(#pointer,#limited,#final) _KernelProcess(Process)
{
// _KernelProcess is a predefined kernel class. so it can inherit from a final class, Process.
// It must be exactly the same as Process other than inheritance and is used internally only.
}
class Semaphore(Object)
{
var waiting_head := nil,

19
moo/kernel/System.moo
View File

@ -128,7 +128,7 @@ class System(Apex)
method(#class) __os_sig_handler: caller
{
| os_intr_sem tmp terminate_process|
| os_intr_sem tmp |
os_intr_sem := Semaphore new.
os_intr_sem signalOnInput: System _getSigfd.
@ -168,27 +168,32 @@ class System(Apex)
the following loops starts from pid 3 up to 100. this is POC only. i need to write a proper enumeration methods and use them.
*/
//Processor _suspendAllUserProcesses. <--- keep kernel processes alive.
//Processor _suspendUserProcesses. <--- keep kernel processes alive.
pid := 3.
while (pid < 100)
{
proc := Processor _processById: pid.
if (proc notError and proc ~~ caller) { System logNl: ("Requesting to suspend process of id - " & pid asString). proc suspend }.
pid := pid + 1.
}.
pid := 3.
while (pid < 100)
{
//proc := Processor processById: pid.
proc := Processor _processById: pid.
if (proc notError) { System logNl: ("Requesting to terminate process of id - " & pid asString). proc terminate }.
if (proc notError and proc ~~ caller) { System logNl: ("Requesting to terminate process of id - " & pid asString). proc terminate }.
pid := pid + 1.
}.
/* TODO: end redo */
caller terminate.
caller terminate. // terminate the startup process.
System logNl: '>>>>End of OS signal handler process ' & (thisProcess id) asString.
//(Processor _processById: 1) resume. //<---- i shouldn't do ths. but, this system causes VM assertion failure. fix it....
self.gcfin_should_exit := true.
self.gcfin_sem signal. // wake the gcfin process.
System _halting.
System _halting. // inform VM that it should get ready for halting.
].
}

10
moo/lib/comp.c
View File

@ -8567,9 +8567,13 @@ static int process_class_superclass (moo_t* moo)
if (MOO_CLASS_SELFSPEC_FLAGS(MOO_OOP_TO_SMOOI(((moo_oop_class_t)cc->super_oop)->selfspec)) & MOO_CLASS_SELFSPEC_FLAG_FINAL)
{
/* cannot inherit a #final class */
moo_setsynerrbfmt (moo, MOO_SYNERR_INHERITBANNED, &cc->fqn_loc, &cc->fqn,
"the %.*js class cannot inherit from a final class", cc->fqn.len, cc->fqn.ptr);
return -1;
if (cc->self_oop == MOO_NULL) /* self_oop is not null if it's a predefined kernel class. */
{
/* the restriction applies to non-kernel classes only */
moo_setsynerrbfmt (moo, MOO_SYNERR_INHERITBANNED, &cc->fqn_loc, &cc->fqn,
"the %.*js class cannot inherit from a final class", cc->fqn.len, cc->fqn.ptr);
return -1;
}
}
}
else

22
moo/lib/exec.c
View File

@ -1624,8 +1624,9 @@ static moo_oop_process_t start_initial_process (moo_t* moo, moo_oop_context_t c)
MOO_ASSERT (moo, moo->processor->runnable.count == MOO_SMOOI_TO_OOP(0));
MOO_ASSERT (moo, moo->processor->active == moo->nil_process);
proc = make_process (moo, c);
proc = make_process(moo, c);
if (!proc) return MOO_NULL;
MOO_OBJ_SET_CLASS(proc, moo->_kernel_process); /* the initial process is special */
chain_into_processor (moo, proc, PROC_STATE_RUNNING);
moo->processor->active = proc;
@ -2060,7 +2061,7 @@ TODO: overcome this problem - accept parameters....
* let's forcefully set active_context to ctx directly. */
moo->active_context = ctx;
proc = start_initial_process (moo, ctx);
proc = start_initial_process(moo, ctx);
moo_popvolats (moo, tmp_count); tmp_count = 0;
if (!proc) goto oops;
@ -2786,13 +2787,18 @@ static moo_pfrc_t pf_process_scheduler_process_by_id (moo_t* moo, moo_mod_t* mod
return MOO_PF_FAILURE;
}
static moo_pfrc_t pf_process_scheduler_suspend_all_user_processes (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
static moo_pfrc_t pf_process_scheduler_suspend_user_processes (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
/* TODO: must exclude special inner processes */
while (moo->processor->runnable.first)
moo_oop_process_t proc;
while ((moo_oop_t)(proc = moo->processor->runnable.first) != moo->_nil)
{
suspend_process (moo, moo->processor->runnable.first);
/* exclude internal kernel classes. suspend user processes only */
if (MOO_CLASSOF(moo, proc) == moo->_process) suspend_process (moo, proc);
}
MOO_STACK_SETRETTORCV (moo, nargs);
return MOO_PF_SUCCESS;
}
/* ------------------------------------------------------------------ */
@ -4327,8 +4333,8 @@ static pf_t pftab[] =
{ "MethodContext_findExceptionHandler:", { pf_context_find_exception_handler, 1, 1 } },
{ "MethodContext_goto:", { pf_context_goto, 1, 1 } },
{ "ProcessScheduler_processById:", { pf_process_scheduler_process_by_id, 1, 1 } },
{ "ProcessScheduler_suspendAllUserProcesses", { pf_process_scheduler_suspend_all_user_processes, 0, 0 } },
{ "ProcessScheduler_processById:", { pf_process_scheduler_process_by_id, 1, 1 } },
{ "ProcessScheduler_suspendUserProcesses", { pf_process_scheduler_suspend_user_processes, 0, 0 } },
{ "Process_resume", { pf_process_resume, 0, 0 } },
{ "Process_sp", { pf_process_sp, 0, 0 } },

10
moo/lib/gc.c
View File

@ -255,7 +255,6 @@ static kernel_class_info_t kernel_classes[] =
MOO_OFFSETOF(moo_t, _methsig) },
{ 13,
{ 'M','e','t','h','o','d','C','o','n','t','e','x','t' },
MOO_CLASS_SELFSPEC_FLAG_FINAL | MOO_CLASS_SELFSPEC_FLAG_LIMITED,
@ -283,6 +282,15 @@ static kernel_class_info_t kernel_classes[] =
MOO_OBJ_TYPE_OOP,
MOO_OFFSETOF(moo_t, _process) },
{ 14,
{ '_','K','e','r','n','e','l','P','r','o','c','e','s','s' },
MOO_CLASS_SELFSPEC_FLAG_FINAL | MOO_CLASS_SELFSPEC_FLAG_LIMITED,
0,
MOO_PROCESS_NAMED_INSTVARS,
MOO_CLASS_SPEC_FLAG_INDEXED,
MOO_OBJ_TYPE_OOP,
MOO_OFFSETOF(moo_t, _kernel_process) },
{ 9,
{ 'S','e','m','a','p','h','o','r','e' },
0,

19
moo/lib/moo.h
View File

@ -742,23 +742,23 @@ typedef struct moo_semaphore_group_t* moo_oop_semaphore_group_t;
struct moo_process_t
{
MOO_OBJ_HEADER;
moo_oop_context_t initial_context;
moo_oop_context_t current_context;
moo_oop_context_t initial_context;
moo_oop_context_t current_context;
moo_oop_t id; /* SmallInteger */
moo_oop_t state; /* SmallInteger */
moo_oop_t sp; /* stack pointer. SmallInteger */
moo_oop_t id; /* SmallInteger */
moo_oop_t state; /* SmallInteger */
moo_oop_t sp; /* stack pointer. SmallInteger */
struct
{
moo_oop_process_t prev;
moo_oop_process_t next;
moo_oop_process_t prev;
moo_oop_process_t next;
} ps; /* links to use with the process scheduler */
struct
{
moo_oop_process_t prev;
moo_oop_process_t next;
moo_oop_process_t prev;
moo_oop_process_t next;
} sem_wait; /* links to use with a semaphore */
moo_oop_t sem; /* nil, semaphore, or semaphore group */
@ -1547,6 +1547,7 @@ struct moo_t
moo_oop_class_t _method_context; /* MethodContext */
moo_oop_class_t _block_context; /* BlockContext */
moo_oop_class_t _process; /* Process */
moo_oop_class_t _kernel_process; /* KernelProcess */
moo_oop_class_t _semaphore; /* Semaphore */
moo_oop_class_t _semaphore_group; /* SemaphoreGroup */
moo_oop_class_t _process_scheduler; /* ProcessScheduler */