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some code touch on process management

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This commit is contained in:
hyunghwan.chung 2019-11-05 09:29:32 +00:00
parent ed9bd1918d
commit 3ae9d2f857
3 changed files with 78 additions and 27 deletions
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8
moo/kernel/System.moo
View File

@ -207,14 +207,14 @@ class System(Apex)
3 .. -> other processes started by application.
*/
/* TODO: this loop is error-prone as it can't handle when the processs id wraps back and the id of gcfin_proc and ossig_proc gets bigger than normal child processes */
//proc := System _findProcessByIdGreaterThan: self.ossig_pid.
proc := System _findProcessByIdGreaterThan: -1.
//proc := System _findNextProcess: self.ossig_pid.
proc := System _findNextProcess: -1.
while (proc notError)
{
pid := proc id.
System logNl: ("Requesting to terminate process of id - " & pid asString).
proc terminate.
proc := System _findProcessByIdGreaterThan: pid.
proc := System _findNextProcess: pid.
}.
System logNl: 'Requesting to terminate the caller process of id ' & (caller id) asString.
@ -236,7 +236,7 @@ class System(Apex)
method(#class,#primitive) _halting.
method(#class,#primitive) _toggleProcessSwitching: v.
method(#class,#primitive,#lenient) _findProcessById: id.
method(#class,#primitive,#lenient) _findProcessByIdGreaterThan: id.
method(#class,#primitive,#lenient) _findNextProcess: id.
method(#class,#primitive) _popCollectable.
method(#class,#primitive) collectGarbage.

93
moo/lib/exec.c
View File

@ -1628,7 +1628,7 @@ 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, 2);
proc = make_process(moo, c, MOO_OBJ_FLAGS_PROC_SYSTEM);
if (!proc) return MOO_NULL;
chain_into_processor (moo, proc, PROC_STATE_RUNNING);
@ -3342,7 +3342,58 @@ static moo_pfrc_t pf_system_find_process_by_id (moo_t* moo, moo_mod_t* mod, moo_
return MOO_PF_FAILURE;
}
static moo_pfrc_t pf_system_find_process_by_id_gt (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
static MOO_INLINE moo_oop_t __find_adjacent_process_by_id_noseterr (moo_t* moo, moo_ooi_t index, int find_next, int exclude_system)
{
if (find_next)
{
if (index < -1) index = -1;
/* TOOD: enhance alloc_pid() and free_pid() to maintain the hightest pid number so that this loop can stop before reaching proc_map_capa */
for (++index; index < moo->proc_map_capa; index++)
{
/* note the free slot contains a small integer which indicate the next slot index in proc_map.
* if the slot it taken, it should point to a process object. read the comment at end of this loop. */
moo_oop_t tmp;
tmp = moo->proc_map[index];
if (MOO_CLASSOF(moo, tmp) == moo->_process)
{
if (exclude_system && MOO_OBJ_GET_FLAGS_PROC(tmp) == MOO_OBJ_FLAGS_PROC_SYSTEM) continue;
MOO_ASSERT (moo, MOO_OBJ_GET_FLAGS_PROC(tmp) == MOO_OBJ_FLAGS_PROC_NORMAL);
return tmp;
}
/* it must be in a free list since the pid slot is not allocated. see alloc_pid() and free_pid() */
MOO_ASSERT (moo, MOO_OOP_IS_SMOOI(moo->proc_map[index]));
}
}
else
{
/* find the previous one */
if (index > moo->proc_map_capa || index <= -1) index = moo->proc_map_capa;
for (--index; index >= 0; index--)
{
moo_oop_t tmp;
tmp = moo->proc_map[index];
if (MOO_CLASSOF(moo, tmp) == moo->_process)
{
if (exclude_system && MOO_OBJ_GET_FLAGS_PROC(tmp) == MOO_OBJ_FLAGS_PROC_SYSTEM) continue;
MOO_ASSERT (moo, MOO_OBJ_GET_FLAGS_PROC(tmp) == MOO_OBJ_FLAGS_PROC_NORMAL);
return tmp;
}
/* it must be in a free list since the pid slot is not allocated. see alloc_pid() and free_pid() */
MOO_ASSERT (moo, MOO_OOP_IS_SMOOI(moo->proc_map[index]));
}
}
return MOO_NULL;
}
static moo_pfrc_t pf_system_find_next_process (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo_oop_t /*rcv,*/ id;
@ -3351,28 +3402,25 @@ static moo_pfrc_t pf_system_find_process_by_id_gt (moo_t* moo, moo_mod_t* mod, m
/*MOO_PF_CHECK_RCV (moo, rcv == (moo_oop_t)moo->processor);*/
if (id == moo->_nil)
{
id = MOO_SMOOI_TO_OOP(-1);
}
else if (MOO_CLASSOF(moo, id) == moo->_process)
{
/* the argument is a process object */
id = ((moo_oop_process_t)id)->id;
}
if (MOO_OOP_IS_SMOOI(id))
{
moo_ooi_t index = MOO_OOP_TO_SMOOI(id);
if (index >= -1) /* allow -1 to be able to return pid 0. */
moo_oop_t tmp;
tmp = __find_adjacent_process_by_id_noseterr(moo, MOO_OOP_TO_SMOOI(id), 1, 1);
if (tmp)
{
/* TOOD: enhance alloc_pid() and free_pid() to maintain the hightest pid number so that this loop can stop before reaching proc_map_capa */
for (++index; index < moo->proc_map_capa; index++)
{
/* note the free slot contains a small integer which indicate the next slot index in proc_map.
* if the slot it taken, it should point to a process object. read the comment at end of this loop. */
moo_oop_t tmp;
tmp = moo->proc_map[index];
if (MOO_CLASSOF(moo, tmp) == moo->_process && MOO_OBJ_GET_FLAGS_PROC(tmp) == 1) /* normal process only. skip a system process */
{
MOO_STACK_SETRET (moo, nargs, tmp);
return MOO_PF_SUCCESS;
}
/* it must be in a free list since the pid slot is not allocated. see alloc_pid() and free_pid() */
MOO_ASSERT (moo, MOO_OOP_IS_SMOOI(moo->proc_map[index]));
}
MOO_STACK_SETRET (moo, nargs, tmp);
return MOO_PF_SUCCESS;
}
}
@ -3380,7 +3428,6 @@ static moo_pfrc_t pf_system_find_process_by_id_gt (moo_t* moo, moo_mod_t* mod, m
return MOO_PF_FAILURE;
}
/* ------------------------------------------------------------------ */
static moo_pfrc_t pf_number_scale (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
@ -4497,8 +4544,8 @@ static pf_t pftab[] =
{ "System_calloc", { moo_pf_system_calloc, 1, 1 } },
{ "System_calloc:", { moo_pf_system_calloc, 1, 1 } },
{ "System_collectGarbage", { moo_pf_system_collect_garbage, 0, 0 } },
{ "System_findNextProcess:", { pf_system_find_next_process, 1, 1 } },
{ "System_findProcessById:", { pf_system_find_process_by_id, 1, 1 } },
{ "System_findProcessByIdGreaterThan:", { pf_system_find_process_by_id_gt, 1, 1 } },
{ "System_free", { moo_pf_system_free, 1, 1 } },
{ "System_free:", { moo_pf_system_free, 1, 1 } },
{ "System_gc", { moo_pf_system_collect_garbage, 0, 0 } },

4
moo/lib/moo.h
View File

@ -376,6 +376,10 @@ typedef enum moo_gcfin_t moo_gcfin_t;
#define MOO_OBJ_FLAGS_HASH_CALLED 1 /* the hash method has been invoked for this object */
#define MOO_OBJ_FLAGS_HASH_STORED 2 /* the object with hash invoke has been moved by GC */
#define MOO_OBJ_FLAGS_PROC_NOT 0 /* not process */
#define MOO_OBJ_FLAGS_PROC_NORMAL 1 /* normal process spawned with a block sent newProcess: */
#define MOO_OBJ_FLAGS_PROC_SYSTEM 2 /* internal process */
#define MOO_OBJ_HEADER \
moo_oow_t _flags; \
moo_oow_t _size; \