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#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "triton_p.h"
#include "memdebug.h"
extern int max_events;
static int epoll_fd;
static struct epoll_event *epoll_events;
static pthread_t md_thr;
static void *md_thread(void *arg);
static mempool_t *md_pool;
static pthread_mutex_t freed_list_lock = PTHREAD_MUTEX_INITIALIZER;
static LIST_HEAD(freed_list);
static LIST_HEAD(freed_list2);
int md_init(void)
{
epoll_fd = epoll_create(1);
if (epoll_fd < 0) {
perror("md:epoll_create");
return -1;
}
epoll_events = _malloc(max_events * sizeof(struct epoll_event));
if (!epoll_events) {
fprintf(stderr,"md:cann't allocate memory\n");
return -1;
}
md_pool = mempool_create(sizeof(struct _triton_md_handler_t));
return 0;
}
void md_run(void)
{
if (pthread_create(&md_thr, NULL, md_thread, NULL)) {
triton_log_error("md:pthread_create: %s", strerror(errno));
_exit(-1);
}
}
void md_terminate(void)
{
pthread_cancel(md_thr);
pthread_join(md_thr, NULL);
}
static void *md_thread(void *arg)
{
int i,n,r;
struct _triton_md_handler_t *h;
sigset_t set;
sigfillset(&set);
sigdelset(&set, SIGKILL);
sigdelset(&set, SIGSTOP);
pthread_sigmask(SIG_BLOCK, &set, NULL);
while(1) {
n = epoll_wait(epoll_fd, epoll_events, max_events, -1);
if (n < 0) {
if (errno == EINTR)
continue;
triton_log_error("md:epoll_wait: %s\n", strerror(errno));
_exit(-1);
}
for(i = 0; i < n; i++) {
h = (struct _triton_md_handler_t *)epoll_events[i].data.ptr;
if (!h->ud)
continue;
spin_lock(&h->ctx->lock);
if (h->ud) {
h->trig_epoll_events |= epoll_events[i].events;
if (!h->pending) {
list_add_tail(&h->entry2, &h->ctx->pending_handlers);
h->pending = 1;
__sync_add_and_fetch(&triton_stat.md_handler_pending, 1);
r = triton_queue_ctx(h->ctx);
} else
r = 0;
} else
r = 0;
spin_unlock(&h->ctx->lock);
if (r)
triton_thread_wakeup(h->ctx->thread);
}
while (!list_empty(&freed_list2)) {
h = list_entry(freed_list2.next, typeof(*h), entry);
list_del(&h->entry);
mempool_free(h);
}
pthread_mutex_lock(&freed_list_lock);
while (!list_empty(&freed_list)) {
h = list_entry(freed_list.next, typeof(*h), entry);
list_del(&h->entry);
list_add(&h->entry, &freed_list2);
}
pthread_mutex_unlock(&freed_list_lock);
}
return NULL;
}
void __export triton_md_register_handler(struct triton_context_t *ctx, struct triton_md_handler_t *ud)
{
struct _triton_md_handler_t *h = mempool_alloc(md_pool);
memset(h, 0, sizeof(*h));
h->ud = ud;
h->epoll_event.data.ptr = h;
if (ctx)
h->ctx = (struct _triton_context_t *)ctx->tpd;
else
h->ctx = (struct _triton_context_t *)default_ctx.tpd;
ud->tpd = h;
spin_lock(&h->ctx->lock);
list_add_tail(&h->entry, &h->ctx->handlers);
spin_unlock(&h->ctx->lock);
triton_stat.md_handler_count++;
}
void __export triton_md_unregister_handler(struct triton_md_handler_t *ud)
{
struct _triton_md_handler_t *h = (struct _triton_md_handler_t *)ud->tpd;
triton_md_disable_handler(ud, MD_MODE_READ | MD_MODE_WRITE);
spin_lock(&h->ctx->lock);
h->ud = NULL;
list_del(&h->entry);
if (h->pending) {
list_del(&h->entry2);
__sync_sub_and_fetch(&triton_stat.md_handler_pending, 1);
}
spin_unlock(&h->ctx->lock);
sched_yield();
pthread_mutex_lock(&freed_list_lock);
list_add_tail(&h->entry, &freed_list);
pthread_mutex_unlock(&freed_list_lock);
triton_stat.md_handler_count--;
}
int __export triton_md_enable_handler(struct triton_md_handler_t *ud, int mode)
{
struct _triton_md_handler_t *h = (struct _triton_md_handler_t *)ud->tpd;
int r;
int events = h->epoll_event.events;
if (mode & MD_MODE_READ)
h->epoll_event.events |= EPOLLIN;
if (mode & MD_MODE_WRITE)
h->epoll_event.events |= EPOLLOUT;
if (!h->trig_level)
h->epoll_event.events |= EPOLLET;
if (events)
r = epoll_ctl(epoll_fd, EPOLL_CTL_MOD, h->ud->fd, &h->epoll_event);
else
r = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, h->ud->fd, &h->epoll_event);
if (r) {
triton_log_error("md:epoll_ctl: %s\n",strerror(errno));
abort();
}
return r;
}
int __export triton_md_disable_handler(struct triton_md_handler_t *ud,int mode)
{
struct _triton_md_handler_t *h = (struct _triton_md_handler_t *)ud->tpd;
int r=0;
if (!h->epoll_event.events)
return -1;
if (mode & MD_MODE_READ)
h->epoll_event.events &= ~EPOLLIN;
if (mode & MD_MODE_WRITE)
h->epoll_event.events &= ~EPOLLOUT;
if (h->epoll_event.events & (EPOLLIN | EPOLLOUT))
r = epoll_ctl(epoll_fd, EPOLL_CTL_MOD, h->ud->fd, &h->epoll_event);
else {
h->epoll_event.events = 0;
r = epoll_ctl(epoll_fd, EPOLL_CTL_DEL, h->ud->fd, NULL);
}
if (r) {
triton_log_error("md:epoll_ctl: %s\n",strerror(errno));
abort();
}
return r;
}
void __export triton_md_set_trig(struct triton_md_handler_t *ud, int mode)
{
struct _triton_md_handler_t *h = (struct _triton_md_handler_t *)ud->tpd;
h->trig_level = mode;
}
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