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added mio_cfmb_t, mio_addcfmb(), and related functions and macros to handle a memory block that can't be freed immediately

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hyung-hwan
2020-05-23 06:07:43 +00:00
parent c441abdbfb
commit 0623260ec4
7 changed files with 165 additions and 60 deletions
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35
mio/lib/mio.c
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@ -30,6 +30,7 @@
#define DEV_CAP_ALL_WATCHED (MIO_DEV_CAP_IN_WATCHED | MIO_DEV_CAP_OUT_WATCHED | MIO_DEV_CAP_PRI_WATCHED)
static void clear_unneeded_cfmbs (mio_t* mio);
static int schedule_kill_zombie_job (mio_dev_t* dev);
static int kill_and_free_device (mio_dev_t* dev, int force);
@ -127,6 +128,7 @@ int mio_init (mio_t* mio, mio_mmgr_t* mmgr, mio_cmgr_t* cmgr, mio_oow_t tmrcapa)
mio->tmr.capa = tmrcapa;
MIO_CFMBL_INIT (&mio->cfmb);
MIO_DEVL_INIT (&mio->actdev);
MIO_DEVL_INIT (&mio->hltdev);
MIO_DEVL_INIT (&mio->zmbdev);
@ -152,6 +154,8 @@ void mio_fini (mio_t* mio)
mio_dev_t diehard;
mio_oow_t i;
mio->_fini_in_progress = 1;
/* clean up free cwq list */
for (i = 0; i < MIO_COUNTOF(mio->cwqfl); i++)
{
@ -230,6 +234,10 @@ void mio_fini (mio_t* mio)
mio_cleartmrjobs (mio);
mio_freemem (mio, mio->tmr.jobs);
printf ("BEGINNING CFMB CLEARANCE........\n");
/* clear unneeded cfmbs insistently - a misbehaving checker will make this cleaning step loop forever*/
while (!MIO_CFMBL_IS_EMPTY(&mio->cfmb)) clear_unneeded_cfmbs (mio);
mio_sys_fini (mio); /* finalize the system dependent data */
mio_freemem (mio, mio->log.ptr);
@ -674,10 +682,30 @@ skip_evcb:
}
}
static void clear_unneeded_cfmbs (mio_t* mio)
{
mio_cfmb_t* cur, * next;
cur = MIO_CFMBL_FIRST_CFMB(&mio->cfmb);
while (!MIO_CFMBL_IS_NIL_CFMB(&mio->cfmb, cur))
{
next = MIO_CFMBL_NEXT_CFMB(cur);
if (cur->cfmb_checker(mio, cur))
{
MIO_CFMBL_UNLINK_CFMB (cur);
mio_freemem (mio, cur);
}
cur = next;
}
}
int mio_exec (mio_t* mio)
{
int ret = 0;
/* clear unneeded cfmbs - i hate to do this. TODO: should i do this less frequently? if less frequent, would it accumulate too many blocks? */
if (!MIO_CFMBL_IS_EMPTY(&mio->cfmb)) clear_unneeded_cfmbs (mio);
/* execute callbacks for completed write operations */
fire_cwq_handlers (mio);
@ -1656,6 +1684,13 @@ void mio_freemem (mio_t* mio, void* ptr)
{
MIO_MMGR_FREE (mio->_mmgr, ptr);
}
/* ------------------------------------------------------------------------ */
void mio_addcfmb (mio_t* mio, mio_cfmb_t* cfmb, mio_cfmb_checker_t checker)
{
cfmb->cfmb_checker = checker;
MIO_CFMBL_APPEND_CFMB (&mio->cfmb, cfmb);
}
/* ------------------------------------------------------------------------ */