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#ifndef PK_EV_H
#define PK_EV_H
#include <stdint.h>
typedef uint64_t pk_ev_mgr_id_T;
typedef uint64_t pk_ev_id_T;
// note: pk_ev_init() is NOT thread-safe
void pk_ev_init();
// note: pk_ev_teardown() is NOT thread-safe
void pk_ev_teardown();
const pk_ev_mgr_id_T pk_ev_create_mgr();
void pk_ev_destroy_mgr(pk_ev_mgr_id_T evmgr);
typedef void (pk_ev_cb)(void *);
const pk_ev_id_T pk_ev_register_ev(pk_ev_mgr_id_T evmgr);
bool pk_ev_register_cb(pk_ev_mgr_id_T evmgr, pk_ev_id_T evid, pk_ev_cb *cb);
void pk_ev_emit(pk_ev_mgr_id_T evmgr, pk_ev_id_T evid, void *user_data);
#endif /* PK_EV_H */
#ifdef PK_IMPL_EV
#include <assert.h>
#include <stdatomic.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <threads.h>
#include <string.h>
#ifndef PK_EV_INIT_MGR_COUNT
# define PK_EV_INIT_MGR_COUNT 1
#endif
#ifndef PK_EV_INIT_EV_COUNT
# define PK_EV_INIT_EV_COUNT 16
#endif
#ifndef PK_EV_INIT_CB_COUNT
# define PK_EV_INIT_CB_COUNT 8
#endif
#ifndef PK_EV_GROW_RATIO
# define PK_EV_GROW_RATIO 1.5
#endif
struct pk_ev {
pk_ev_cb **cb;
atomic_uint_fast8_t n_cb;
};
struct pk_ev_mgr {
struct pk_ev *ev;
atomic_uint_fast8_t n_ev;
atomic_uint_fast8_t rn_ev;
atomic_uint_fast8_t rn_cb;
};
struct pk_ev_mstr {
atomic_uint_fast64_t flg_mgrs;
atomic_uint_fast64_t rn_mgrs;
struct pk_ev_mgr **mgrs;
mtx_t *mtxs;
};
struct pk_ev_mstr pk_ev_mstr;
inline void
pk_ev_init()
{
int i;
pk_ev_mstr.mgrs = (struct pk_ev_mgr **)malloc(sizeof(void *) * PK_EV_INIT_MGR_COUNT);
pk_ev_mstr.mtxs = (mtx_t*)malloc(sizeof(mtx_t) * PK_EV_INIT_MGR_COUNT);
memset(pk_ev_mstr.mgrs, 0, sizeof(void *) * PK_EV_INIT_MGR_COUNT);
memset(pk_ev_mstr.mtxs, 0, sizeof(mtx_t) * PK_EV_INIT_MGR_COUNT);
for (i = 0; i < PK_EV_INIT_MGR_COUNT; ++i) {
mtx_init(&pk_ev_mstr.mtxs[i], mtx_plain);
}
atomic_store(&pk_ev_mstr.flg_mgrs, 0);
atomic_store(&pk_ev_mstr.rn_mgrs, PK_EV_INIT_MGR_COUNT);
}
inline void
pk_ev_teardown()
{
int i;
for (i = 0; i < pk_ev_mstr.rn_mgrs; ++i) {
if ((atomic_load(&pk_ev_mstr.rn_mgrs) & (1lu << i)) == 0) continue;
mtx_lock(&pk_ev_mstr.mtxs[i]);
free(pk_ev_mstr.mgrs[i]);
pk_ev_mstr.mgrs[i] = NULL;
mtx_unlock(&pk_ev_mstr.mtxs[i]);
mtx_destroy(&pk_ev_mstr.mtxs[i]);
}
free(pk_ev_mstr.mgrs);
free(pk_ev_mstr.mtxs);
pk_ev_mstr.mgrs = NULL;
pk_ev_mstr.mtxs = NULL;
}
static inline struct pk_ev_mgr*
pk_ev_inner_ev_mgr_create(uint64_t ev_count, uint64_t cb_count)
{
int i;
struct pk_ev *ev;
size_t sz = sizeof(struct pk_ev_mgr) + ((sizeof(struct pk_ev) * ev_count)) + (sizeof (void *) * ev_count * cb_count);
size_t sz_ev = (sizeof(pk_ev_cb*) * cb_count);
size_t sz_evs = sizeof(struct pk_ev) * ev_count;
struct pk_ev_mgr *mgr = (struct pk_ev_mgr*)malloc(sz);
if (mgr == NULL) goto early_exit;
memset(mgr, 0, sz);
mgr->ev = (struct pk_ev*)(((char *)mgr) + sizeof(struct pk_ev_mgr));
atomic_init(&mgr->rn_ev, ev_count);
atomic_init(&mgr->rn_cb, cb_count);
atomic_init(&mgr->n_ev, 0);
for (i = 0; i < mgr->rn_ev; ++i) {
ev = &mgr->ev[i];
atomic_init(&ev->n_cb, 0);
ev->cb = (pk_ev_cb**)(((char *)mgr) + sizeof(struct pk_ev_mgr) + sz_evs + (sz_ev * i));
}
early_exit:
return mgr;
}
static inline void
pk_ev_inner_ev_mgr_clone(struct pk_ev_mgr *old, struct pk_ev_mgr *mgr)
{
int i;
struct pk_ev *ev_old;
struct pk_ev *ev;
atomic_store(&mgr->n_ev, atomic_load(&old->n_ev));
for (i = 0; i < old->n_ev; ++i) {
ev_old = &old->ev[i];
ev = &mgr->ev[i];
memcpy(ev->cb, ev_old->cb, sizeof(pk_ev_cb*) * atomic_load(&ev_old->n_cb));
atomic_store(&ev->n_cb, atomic_load(&ev_old->n_cb));
}
}
inline const pk_ev_mgr_id_T
pk_ev_create_mgr()
{
uint64_t i;
pk_ev_mgr_id_T flg;
pk_ev_mgr_id_T flg_new;
pk_ev_mgr_id_T id;
struct pk_ev_mgr *mgr = pk_ev_inner_ev_mgr_create(PK_EV_INIT_EV_COUNT, PK_EV_INIT_CB_COUNT);
if (mgr == NULL) return -1;
start:
flg = atomic_load(&pk_ev_mstr.flg_mgrs);
while (1) {
flg_new = flg;
for (i = 0; i < atomic_load(&pk_ev_mstr.rn_mgrs); ++i) {
if ((flg & (1u << i)) == 0) break;
}
if (i == atomic_load(&pk_ev_mstr.rn_mgrs)) {
goto recreate;
}
id = i;
flg_new |= (1u << i);
if (atomic_compare_exchange_strong(&pk_ev_mstr.flg_mgrs, &flg, flg_new)) break;
thrd_yield();
}
pk_ev_mstr.mgrs[id]= mgr;
return id;
recreate:
// TODO recreate mgr, out of space
assert(1 == 0 && "[pkev.h] Out of mgr space.");
exit(1);
goto start;
}
inline void
pk_ev_destroy_mgr(pk_ev_mgr_id_T evmgr)
{
assert(evmgr >= 0);
mtx_lock(&pk_ev_mstr.mtxs[evmgr]);
free(pk_ev_mstr.mgrs[evmgr]);
pk_ev_mstr.mgrs[evmgr] = NULL;
mtx_unlock(&pk_ev_mstr.mtxs[evmgr]);
}
inline const pk_ev_id_T
pk_ev_register_ev(pk_ev_mgr_id_T evmgr)
{
assert(evmgr < 64);
pk_ev_id_T id;
struct pk_ev_mgr *mgr;
mtx_lock(&pk_ev_mstr.mtxs[evmgr]);
if (pk_ev_mstr.mgrs[evmgr]->n_ev == pk_ev_mstr.mgrs[evmgr]->rn_ev) {
mgr = pk_ev_inner_ev_mgr_create(pk_ev_mstr.mgrs[evmgr]->rn_ev * PK_EV_GROW_RATIO, pk_ev_mstr.mgrs[evmgr]->rn_cb);
pk_ev_inner_ev_mgr_clone(pk_ev_mstr.mgrs[evmgr], mgr);
free(pk_ev_mstr.mgrs[evmgr]);
pk_ev_mstr.mgrs[evmgr] = mgr;
}
id = pk_ev_mstr.mgrs[evmgr]->n_ev++;
mtx_unlock(&pk_ev_mstr.mtxs[evmgr]);
return id;
}
inline bool
pk_ev_register_cb(pk_ev_mgr_id_T evmgr, pk_ev_id_T evid, pk_ev_cb *cb)
{
assert(evmgr < 64);
struct pk_ev_mgr *mgr;
mtx_lock(&pk_ev_mstr.mtxs[evmgr]);
if (pk_ev_mstr.mgrs[evmgr]->ev[evid].n_cb == pk_ev_mstr.mgrs[evmgr]->rn_cb) {
mgr = pk_ev_inner_ev_mgr_create(pk_ev_mstr.mgrs[evmgr]->rn_ev, pk_ev_mstr.mgrs[evmgr]->rn_cb * PK_EV_GROW_RATIO);
pk_ev_inner_ev_mgr_clone(pk_ev_mstr.mgrs[evmgr], mgr);
free(pk_ev_mstr.mgrs[evmgr]);
pk_ev_mstr.mgrs[evmgr] = mgr;
}
pk_ev_mstr.mgrs[evmgr]->ev[evid].cb[pk_ev_mstr.mgrs[evmgr]->ev[evid].n_cb++] = cb;
mtx_unlock(&pk_ev_mstr.mtxs[evmgr]);
return true;
}
inline void
pk_ev_emit(pk_ev_mgr_id_T evmgr, pk_ev_id_T evid, void *user_data)
{
assert(evmgr < 64);
uint8_t i;
for (i = 0; i < pk_ev_mstr.mgrs[evmgr]->ev[evid].n_cb; ++i) {
(*pk_ev_mstr.mgrs[evmgr]->ev[evid].cb[i])(user_data);
}
}
#endif
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