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doops.h
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#ifndef DOOPS_H
#define DOOPS_H
#include <time.h>
#include <stdlib.h>
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#ifdef _WIN32
#ifndef WITH_POLL
#define WITH_SELECT
#endif
#define DOOPS_SPINLOCK_TYPE LONG
#else
#define DOOPS_SPINLOCK_TYPE int
#ifdef __linux__
#if !defined(WITH_POLL) && !defined(WITH_SELECT)
#define WITH_EPOLL
#endif
#else
#if defined(__MACH__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
#if !defined(WITH_POLL) && !defined(WITH_SELECT)
#define WITH_KQUEUE
#endif
#else
#ifndef DOOPS_NO_IO_EVENTS
#pragma message ( "WARNING: Cannot determine operating system. Falling back to select." )
#include <sys/types.h>
#include <unistd.h>
#include <sys/select.h>
#endif
#define WITH_SELECT
#endif
#endif
#endif
#ifdef WITH_EPOLL
#include <sys/epoll.h>
#endif
#ifdef WITH_KQUEUE
#include <sys/types.h>
#include <sys/event.h>
#endif
#ifdef WITH_POLL
#ifdef ESP32
#include <sys/poll.h>
#else
#include <poll.h>
#endif
#endif
#define DOOPS_MAX_SLEEP 500
#define DOOPS_MAX_EVENTS 1024
#if !defined(DOOPS_FREE) || !defined(DOOPS_MALLOC) || !defined(DOOPS_REALLOC)
#define DOOPS_MALLOC(bytes) malloc(bytes)
#define DOOPS_FREE(ptr) free(ptr)
#define DOOPS_REALLOC(ptr, size) realloc(ptr, size)
#endif
#ifdef _WIN32
#include <windows.h>
#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
#define DELTA_EPOCH_IN_MICROSECS 116444736000000000Ui64
#else
#define DELTA_EPOCH_IN_MICROSECS 116444736000000000ULL
#endif
static int gettimeofday(struct timeval *tv, void *not_used) {
FILETIME ft;
unsigned __int64 tmpres = 0;
if (NULL != tv) {
GetSystemTimeAsFileTime(&ft);
tmpres |= ft.dwHighDateTime;
tmpres <<= 32;
tmpres |= ft.dwLowDateTime;
tmpres -= DELTA_EPOCH_IN_MICROSECS;
tmpres /= 10;
tv->tv_sec = (long)(tmpres / 1000000UL);
tv->tv_usec = (long)(tmpres % 1000000UL);
}
return 0;
}
#else
#include <sys/time.h>
#include <unistd.h>
#endif
#define DOOPS_READ 0
#define DOOPS_READWRITE 1
struct doops_loop;
#ifdef __cplusplus
#define PRIVATE_LOOP_MAKE_ANON_FUNCTION(x, y) private_lambda_call_ ## x ## y
#define PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(x, y) PRIVATE_LOOP_MAKE_ANON_FUNCTION(x, y)
#define PRIVATE_LOOP_MAKE_ANON_STRUCT(x, y) private_lambda_struct_ ## x ## y
#define PRIVATE_LOOP_MAKE_ANON_FUNCTION_STRUCT(x, y) PRIVATE_LOOP_MAKE_ANON_STRUCT(x, y)
#define loop_code_data(loop_ptr, code, interval, userdata_ptr) { \
struct PRIVATE_LOOP_MAKE_ANON_STRUCT(__func__, __LINE__) { \
static int PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__) (struct doops_loop *loop) { \
code; \
return 0; \
}; \
}; \
loop_add(loop_ptr, PRIVATE_LOOP_MAKE_ANON_STRUCT(__func__, __LINE__)::PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__), interval, userdata_ptr); \
}
#define loop_on_read(loop_ptr, code) { \
struct PRIVATE_LOOP_MAKE_ANON_STRUCT(__func__, __LINE__) { \
static void PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__) (struct doops_loop *loop, int fd) { \
code; \
}; \
}; \
if (loop_ptr) \
(loop_ptr)->io_read = PRIVATE_LOOP_MAKE_ANON_STRUCT(__func__, __LINE__)::PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__); \
}
#define loop_on_write(loop_ptr, code) { \
struct PRIVATE_LOOP_MAKE_ANON_STRUCT(__func__, __LINE__) { \
static void PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__) (struct doops_loop *loop, int fd) { \
code; \
}; \
}; \
if (loop_ptr) \
(loop_ptr)->io_write = PRIVATE_LOOP_MAKE_ANON_STRUCT(__func__, __LINE__)::PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__); \
}
#define LOOP_IS_READABLE(loop) (loop->io_read)
#define LOOP_IS_WRITABLE(loop) (loop->io_write)
#else
#if defined(__clang__) && !defined(WITHOUT_BLOCKS)
#define WITH_BLOCKS
#include <Block.h>
#define loop_code_data(loop_ptr, code, interval, userdata_ptr) { \
loop_add_block(loop_ptr, ^(struct doops_loop *loop) { \
code; \
return 0; \
}, interval, userdata_ptr); \
}
#define loop_on_read(loop_ptr, code) { \
if (loop_ptr) { \
(loop_ptr)->io_read = NULL; \
if ((loop_ptr)->io_read_block) \
Block_release((loop_ptr)->io_read_block); \
(loop_ptr)->io_read_block = Block_copy(^(struct doops_loop *loop, int fd) { code; }); \
} \
}
#define loop_on_write(loop_ptr, code) { \
if (loop_ptr) { \
(loop_ptr)->io_write = NULL; \
if ((loop_ptr)->io_write_block) \
Block_release((loop_ptr)->io_write_block); \
(loop_ptr)->io_write_block = Block_copy(^(struct doops_loop *loop, int fd) { code; }); \
} \
}
#define LOOP_IS_READABLE(loop) ((loop->io_read) || (loop->io_read_block))
#define LOOP_IS_WRITABLE(loop) ((loop->io_write) || (loop->io_write_block))
#else
#define LOOP_IS_READABLE(loop) (loop->io_read)
#define LOOP_IS_WRITABLE(loop) (loop->io_write)
#ifdef __GNUC__
#define PRIVATE_LOOP_MAKE_ANON_FUNCTION(x, y) private_lambda_call_ ## x ## y
#define PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(x, y) PRIVATE_LOOP_MAKE_ANON_FUNCTION(x, y)
#define loop_code_data(loop_ptr, code, interval, userdata_ptr) { \
int PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__) (struct doops_loop *loop) { \
code; \
return 0; \
}; \
loop_add(loop_ptr, PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__), interval, userdata_ptr); \
}
#define loop_on_read(loop_ptr, code) { \
void PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__) (struct doops_loop *loop, int fd) { \
code; \
}; \
if (loop_ptr) \
(loop_ptr)->io_read = PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__); \
}
#define loop_on_write(loop_ptr, code) { \
void PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__) (struct doops_loop *loop, int fd) { \
code; \
}; \
if (loop_ptr) \
(loop_ptr)->io_write = PRIVATE_LOOP_MAKE_ANON_FUNCTION_NAME(__func__, __LINE__); \
}
#else
#pragma message ( "Code blocks are not supported by your compiler" )
#endif
#endif
#endif
#define loop_code(loop_ptr, code, interval) loop_code_data(loop_ptr, code, interval, NULL);
#define loop_schedule loop_code
typedef int (*doop_callback)(struct doops_loop *loop);
typedef int (*doop_foreach_callback)(struct doops_loop *loop, void *foreachdata);
typedef int (*doop_idle_callback)(struct doops_loop *loop);
typedef void (*doop_io_callback)(struct doops_loop *loop, int fd);
typedef void (*doop_udata_free_callback)(struct doops_loop *loop, void *ptr);
#ifdef WITH_BLOCKS
typedef int (^doop_callback_block)(struct doops_loop *loop);
typedef void (^doop_io_callback_block)(struct doops_loop *loop, int fd);
#endif
struct doops_event {
doop_callback event_callback;
#ifdef WITH_BLOCKS
doop_callback_block event_block;
#endif
uint64_t when;
uint64_t interval;
void *user_data;
struct doops_event *next;
};
struct doops_loop {
int quit;
doop_idle_callback idle;
struct doops_event *events;
doop_io_callback io_read;
doop_io_callback io_write;
doop_udata_free_callback udata_free;
#ifdef WITH_BLOCKS
doop_io_callback_block io_read_block;
doop_io_callback_block io_write_block;
#endif
#if defined(WITH_EPOLL) || defined(WITH_KQUEUE)
int poll_fd;
int max_fd;
void **udata;
#else
#ifdef WITH_POLL
struct pollfd *fds;
int max_fd;
#else
int max_fd;
// fallback to select
fd_set inlist;
fd_set outlist;
fd_set exceptlist;
#endif
void **udata;
#endif
DOOPS_SPINLOCK_TYPE lock;
int event_fd;
unsigned int io_objects;
void *event_data;
struct doops_event *in_event;
unsigned char reset_in_event;
unsigned char io_wait;
};
static void _private_loop_init_io(struct doops_loop *loop) {
if (!loop)
return;
#ifdef WITH_EPOLL
if (loop->poll_fd <= 0)
loop->poll_fd = epoll_create1(0);
#else
#ifdef WITH_KQUEUE
if (loop->poll_fd <= 0)
loop->poll_fd = kqueue();
#else
#ifdef WITH_POLL
if (!loop->max_fd) {
loop->fds = NULL;
}
#else
if (!loop->max_fd) {
FD_ZERO(&loop->inlist);
FD_ZERO(&loop->outlist);
FD_ZERO(&loop->exceptlist);
loop->max_fd = 1;
}
#endif
#endif
#endif
}
static uint64_t milliseconds() {
struct timeval tv;
gettimeofday(&tv, NULL);
return (uint64_t)(tv.tv_sec) * 1000 + (uint64_t)(tv.tv_usec) / 1000;
}
static void doops_lock(volatile DOOPS_SPINLOCK_TYPE *ptr) {
if (!ptr)
return;
#ifdef _WIN32
while (InterlockedCompareExchange(ptr, 1, 0)) {
// wait for lock
}
#else
while (__sync_lock_test_and_set(ptr, 1))
while (*ptr);
#endif
}
static void doops_unlock(volatile DOOPS_SPINLOCK_TYPE *ptr) {
if (!ptr)
return;
#ifdef _WIN32
InterlockedExchange(ptr, 0);
#else
__sync_lock_release (ptr);
#endif
}
static void loop_init(struct doops_loop *loop) {
if (loop) {
memset(loop, 0, sizeof(struct doops_loop));
loop->io_wait = 1;
}
}
static struct doops_loop *loop_new() {
struct doops_loop *loop = (struct doops_loop *)DOOPS_MALLOC(sizeof(struct doops_loop));
if (loop)
loop_init(loop);
return loop;
}
static int loop_add(struct doops_loop *loop, doop_callback callback, int64_t interval, void *user_data) {
if ((!callback) || (!loop)) {
errno = EINVAL;
return -1;
}
struct doops_event *event_callback = (struct doops_event *)DOOPS_MALLOC(sizeof(struct doops_event));
if (!event_callback) {
errno = ENOMEM;
return -1;
}
if (!loop->in_event)
doops_lock(&loop->lock);
event_callback->event_callback = callback;
#ifdef WITH_BLOCKS
event_callback->event_block = NULL;
#endif
if (interval < 0)
event_callback->interval = (uint64_t)(-interval);
else
event_callback->interval = (uint64_t)interval;
event_callback->when = milliseconds() + interval;
event_callback->user_data = user_data;
event_callback->next = loop->events;
loop->events = event_callback;
if (loop->in_event)
loop->reset_in_event = 2;
else
doops_unlock(&loop->lock);
return 0;
}
#ifdef WITH_BLOCKS
static int loop_add_block(struct doops_loop *loop, doop_callback_block callback, int64_t interval, void *user_data) {
if ((!callback) || (!loop)) {
errno = EINVAL;
return -1;
}
struct doops_event *event_callback = (struct doops_event *)DOOPS_MALLOC(sizeof(struct doops_event));
if (!event_callback) {
errno = ENOMEM;
return -1;
}
if (!loop->in_event)
doops_lock(&loop->lock);
event_callback->event_callback = NULL;
event_callback->event_block = Block_copy(callback);
if (interval < 0)
event_callback->interval = (uint64_t)(-interval);
else
event_callback->interval = (uint64_t)interval;
event_callback->when = milliseconds() + interval;
event_callback->user_data = user_data;
event_callback->next = loop->events;
loop->events = event_callback;
if (loop->in_event)
loop->reset_in_event = 2;
else
doops_unlock(&loop->lock);
return 0;
}
#endif
static int loop_add_io_data(struct doops_loop *loop, int fd, int mode, void *userdata) {
if ((fd < 0) || (!loop)) {
errno = EINVAL;
return -1;
}
int locked = 0;
if (!loop->in_event) {
doops_lock(&loop->lock);
locked = 1;
}
_private_loop_init_io(loop);
#ifdef WITH_EPOLL
struct epoll_event event;
// supress valgrind warning
event.data.u64 = 0;
event.data.fd = fd;
event.events = EPOLLIN | EPOLLPRI | EPOLLHUP | EPOLLRDHUP | EPOLLET;
if (mode) {
event.events |= EPOLLOUT;
// write-only
if (mode == 2)
event.events &= ~(EPOLLIN | EPOLLRDHUP);
}
int err = epoll_ctl (loop->poll_fd, EPOLL_CTL_ADD, fd, &event);
if ((err) && (errno == EEXIST))
err = epoll_ctl (loop->poll_fd, EPOLL_CTL_MOD, fd, &event);
if (err) {
if (locked)
doops_unlock(&loop->lock);
return -1;
}
if ((userdata) || (loop->udata)) {
if (fd >= loop->max_fd) {
loop->max_fd = fd + 1;
loop->udata = DOOPS_REALLOC(loop->udata, sizeof(void *) * loop->max_fd);
}
if (loop->udata)
loop->udata[fd] = userdata;
}
#else
#ifdef WITH_KQUEUE
struct kevent events[2];
int num_events = 0;
if (mode != 2) {
EV_SET(&events[0], fd, EVFILT_READ, EV_ADD | EV_ENABLE | EV_CLEAR, 0, 0, 0);
events[0].udata = userdata;
num_events ++;
}
if (mode) {
EV_SET(&events[num_events], fd, EVFILT_WRITE, EV_ADD | EV_ENABLE | EV_CLEAR, 0, 0, 0);
events[num_events].udata = userdata;
num_events ++;
}
if (locked)
doops_unlock(&loop->lock);
return kevent(loop->poll_fd, events, num_events, NULL, 0, NULL);
#else
#ifdef WITH_POLL
loop->fds = (struct pollfd *)DOOPS_REALLOC(loop->fds, sizeof(struct pollfd) * (loop->max_fd + 1));
loop->fds[loop->max_fd].fd = fd;
loop->fds[loop->max_fd].events = POLLIN | POLLPRI | POLLERR | POLLHUP | POLLNVAL;
if (mode) {
loop->fds[loop->max_fd].events |= POLLOUT;
// write-only
if (mode == 2)
loop->fds[loop->max_fd].events &= ~POLLIN;
}
if ((userdata) || (loop->udata)) {
loop->udata = (void **)DOOPS_REALLOC(loop->udata, sizeof(void *) * (loop->max_fd + 1));
if (loop->udata)
loop->udata[loop->max_fd] = userdata;
}
loop->max_fd ++;
#else
if (mode != 2)
FD_SET(fd, &loop->inlist);
FD_SET(fd, &loop->exceptlist);
if (mode)
FD_SET(fd, &loop->outlist);
if (fd >= loop->max_fd)
loop->max_fd = fd + 1;
if ((userdata) || (loop->udata)) {
loop->udata = (void **)DOOPS_REALLOC(loop->udata, sizeof(void *) * loop->max_fd);
if (loop->udata)
loop->udata[fd] = userdata;
}
#endif
#endif
#endif
loop->io_objects ++;
if (locked)
doops_unlock(&loop->lock);
return 0;
}
static int loop_add_io(struct doops_loop *loop, int fd, int mode) {
return loop_add_io_data(loop, fd, mode, NULL);
}
static int loop_pause_write_io(struct doops_loop *loop, int fd) {
if (!loop) {
errno = EINVAL;
return -1;
}
#ifdef WITH_KQUEUE
// using EV_CLEAR instead
// struct kevent event;
// EV_SET(&event, fd, EVFILT_WRITE, EV_ADD | EV_DISABLE, 0, 0, 0);
// return kevent(loop->poll_fd, &event, 1, NULL, 0, NULL);
#else
#ifdef WITH_POLL
int i;
if (loop->fds) {
for (i = 0; i < loop->max_fd; i ++) {
if (loop->fds[i].fd == fd) {
loop->fds[i].events &= ~POLLOUT;
break;
}
}
}
#else
#ifdef WITH_SELECT
FD_CLR(fd, &loop->outlist);
#endif
#endif
#endif
return 0;
}
static int loop_resume_write_io(struct doops_loop *loop, int fd) {
if (!loop) {
errno = EINVAL;
return -1;
}
#ifdef WITH_KQUEUE
// using EV_CLEAR instead
// struct kevent event;
// EV_SET(&event, fd, EVFILT_WRITE, EV_ADD | EV_ENABLE, 0, 0, 0);
// return kevent(loop->poll_fd, &event, 1, NULL, 0, NULL);
#else
#ifdef WITH_POLL
int i;
if (loop->fds) {
for (i = 0; i < loop->max_fd; i ++) {
if (loop->fds[i].fd == fd) {
loop->fds[i].events |= POLLOUT;
break;
}
}
}
#else
#ifdef WITH_SELECT
FD_SET(fd, &loop->outlist);
#endif
#endif
#endif
return 0;
}
static int loop_remove_io(struct doops_loop *loop, int fd) {
if ((fd < 0) || (!loop)) {
errno = EINVAL;
return -1;
}
_private_loop_init_io(loop);
#ifdef WITH_EPOLL
struct epoll_event event;
// supress valgrind warning
event.data.u64 = 0;
event.data.fd = fd;
event.events = 0;
if (fd == loop->max_fd - 1)
loop->max_fd --;
int err = epoll_ctl (loop->poll_fd, EPOLL_CTL_DEL, fd, &event);
if (!err)
loop->io_objects --;
return err;
#else
#ifdef WITH_KQUEUE
struct kevent event;
EV_SET(&event, fd, EVFILT_READ, EV_DELETE, 0, 0, 0);
kevent(loop->poll_fd, &event, 1, NULL, 0, NULL);
EV_SET(&event, fd, EVFILT_WRITE, EV_DELETE, 0, 0, 0);
kevent(loop->poll_fd, &event, 1, NULL, 0, NULL);
#else
#ifdef WITH_POLL
if ((loop->max_fd) && (loop->fds)) {
int i;
int found = 0;
for (i = 0; i < loop->max_fd; i ++) {
if (loop->fds[i].fd == fd)
found = 1;
if ((found) && (i < loop->max_fd - 1)) {
loop->fds[i] = loop->fds[i + 1];
if (loop->udata)
loop->udata[i] = loop->udata[i + 1];
}
}
if (found)
loop->max_fd --;
}
#else
FD_CLR(fd, &loop->inlist);
FD_CLR(fd, &loop->exceptlist);
FD_CLR(fd, &loop->outlist);
if (fd == loop->max_fd - 1)
loop->max_fd --;
#endif
#endif
#endif
loop->io_objects --;
return 0;
}
static int loop_remove(struct doops_loop *loop, doop_callback callback, void *user_data) {
if (!loop) {
errno = EINVAL;
return -1;
}
int locked = 0;
if (!loop->in_event) {
doops_lock(&loop->lock);
locked = 1;
} else
if (!loop->reset_in_event)
loop->reset_in_event = 2;
int removed_event = 0;
if ((loop->events) && (!loop->quit)) {
struct doops_event *ev = loop->events;
struct doops_event *prev_ev = NULL;
struct doops_event *next_ev = NULL;
void *userdata = loop->event_data;
while (ev) {
next_ev = ev->next;
if (((!callback) || (callback == ev->event_callback)) && ((!user_data) || (user_data == ev->user_data))) {
if (loop->in_event == ev) {
// cannot delete current event, notify the loop
loop->reset_in_event = 1;
} else {
if ((loop->udata_free) && (loop->events->user_data)) {
loop->event_data = loop->events->user_data;
loop->udata_free(loop, loop->events->user_data);
}
DOOPS_FREE(ev);
if (prev_ev)
prev_ev->next = next_ev;
else
loop->events = next_ev;
ev = next_ev;
if (ev)
next_ev = ev->next;
}
removed_event ++;
if ((callback) && (user_data))
break;
continue;
}
prev_ev = ev;
ev = next_ev;
}
loop->event_data = userdata;
}
if (locked)
doops_unlock(&loop->lock);
return removed_event;
}
static int loop_foreach_callback(struct doops_loop *loop, void *foreachcallback, doop_foreach_callback callback, void *foreachdata) {
if ((!loop) || (!callback)) {
errno = EINVAL;
return -1;
}
doops_lock(&loop->lock);
int removed_event = 0;
if ((loop->events) && (!loop->quit)) {
struct doops_event *ev = loop->events;
struct doops_event *prev_ev = NULL;
struct doops_event *next_ev = NULL;
void *userdata = loop->event_data;
while ((ev) && (!loop->quit)) {
next_ev = ev->next;
if ((ev->event_callback == foreachcallback) || (!foreachcallback)) {
loop->event_data = ev->user_data;
int ret_code = callback(loop, foreachdata);
if (ret_code < 0)
break;
if (ret_code) {
if ((loop->udata_free) && (ev->user_data))
loop->udata_free(loop, ev->user_data);
#ifdef WITH_BLOCKS
if (ev->event_block)
Block_release(ev->event_block);
#endif
DOOPS_FREE(ev);
if (prev_ev)
prev_ev->next = next_ev;
else
loop->events = next_ev;
ev = next_ev;
removed_event ++;
if (ret_code != 1)
continue;
}
}
prev_ev = ev;
ev = next_ev;
}
loop->event_data = userdata;
}
doops_unlock(&loop->lock);
return removed_event;
}
static int loop_foreach(struct doops_loop *loop, doop_foreach_callback callback, void *foreachdata) {
return loop_foreach_callback(loop, NULL, callback, foreachdata);
}
static void loop_quit(struct doops_loop *loop) {
if (loop)
loop->quit = 1;
}
static int _private_loop_iterate(struct doops_loop *loop, int *sleep_val) {
int loops = 0;
if (sleep_val)
*sleep_val = DOOPS_MAX_SLEEP;
doops_lock(&loop->lock);
if ((loop->events) && (!loop->quit)) {
struct doops_event *ev = loop->events;
struct doops_event *prev_ev = NULL;
struct doops_event *next_ev = NULL;
while ((ev) && (!loop->quit)) {
next_ev = ev->next;
uint64_t now = milliseconds();
if (ev->when <= now) {
loops ++;
loop->event_data = ev->user_data;
int remove_event = 1;
loop->in_event = ev;
loop->reset_in_event = 0;
#ifdef WITH_BLOCKS
if (ev->event_block)
remove_event = ev->event_block(loop);
else
#endif
if (ev->event_callback)
remove_event = ev->event_callback(loop);
// remove_event called on the current event
if (loop->reset_in_event) {
next_ev = ev->next;
prev_ev = NULL;
struct doops_event *ev_2 = loop->events;
while ((ev_2) && (ev != ev_2)) {
prev_ev = ev_2;
ev_2 = ev_2->next;
}
if (loop->reset_in_event == 1)
remove_event = 1;
loop->reset_in_event = 0;
*sleep_val = 0;
}
loop->in_event = NULL;
if (remove_event) {
if ((loop->udata_free) && (ev->user_data))
loop->udata_free(loop, ev->user_data);
#ifdef WITH_BLOCKS
if (ev->event_block)
Block_release(ev->event_block);
#endif
DOOPS_FREE(ev);
if (prev_ev)
prev_ev->next = next_ev;
else
loop->events = next_ev;
ev = next_ev;
continue;
}
while ((ev->when <= now) && (ev->interval))
ev->when += ev->interval;
}
if (sleep_val) {
int delta = (int)(ev->when - now);
if (delta < *sleep_val)
*sleep_val = delta;
}
prev_ev = ev;
ev = next_ev;
}
if (!loop->events)
*sleep_val = 0;
}
doops_unlock(&loop->lock);
return loops;
}
static int loop_iterate(struct doops_loop *loop) {
return _private_loop_iterate(loop, NULL);
}
static int loop_idle(struct doops_loop *loop, doop_idle_callback callback) {
if (!loop) {
errno = EINVAL;
return -1;
}
loop->idle = callback;
return 0;
}
static int loop_io(struct doops_loop *loop, doop_io_callback read_callback, doop_io_callback write_callback) {
if (!loop) {
errno = EINVAL;
return -1;
}
loop->io_read = read_callback;
loop->io_write = write_callback;
#ifdef WITH_BLOCK
if (loop->io_read_block) {
Block_release(loop->io_read_block);
loop->io_read_block = NULL;
}
if (loop->io_write_block) {
Block_release(loop->io_write_block);
loop->io_write_block = NULL;
}
#endif
return 0;
}
static void _private_loop_remove_events(struct doops_loop *loop) {
struct doops_event *next_ev;
doops_lock(&loop->lock);
while (loop->events) {
next_ev = loop->events->next;
if ((loop->udata_free) && (loop->events->user_data)) {
loop->event_data = loop->events->user_data;
loop->udata_free(loop, loop->events->user_data);
}
#ifdef WITH_BLOCKS
if ((loop->events) && (loop->events->event_block))
Block_release(loop->events->event_block);
#endif
DOOPS_FREE(loop->events);
loop->events = next_ev;
}
#ifndef WITH_KQUEUE
if (loop->udata) {
DOOPS_FREE(loop->udata);
loop->udata = NULL;
}
loop->max_fd = 1;
#endif
doops_unlock(&loop->lock);
}
static void _private_sleep(struct doops_loop *loop, int sleep_val) {
if (!loop)
return;
#ifndef DOOPS_NO_IO_EVENTS
#ifdef WITH_EPOLL
if ((loop->poll_fd > 0) && ((LOOP_IS_READABLE(loop)) || (LOOP_IS_WRITABLE(loop)))) {
struct epoll_event events[DOOPS_MAX_EVENTS];
int nfds = epoll_wait(loop->poll_fd, events, DOOPS_MAX_EVENTS, sleep_val);
int i;
for (i = 0; i < nfds; i ++) {
if (LOOP_IS_WRITABLE(loop)) {
if (events[i].events & EPOLLOUT) {
loop->event_fd = events[i].data.fd;
loop->event_data = loop->udata ? loop->udata[events[i].data.fd] : NULL;
#ifdef WITH_BLOCKS
if (loop->io_write_block)
loop->io_write_block(loop, events[i].data.fd);
else
#endif
loop->io_write(loop, events[i].data.fd);
}
}
if (LOOP_IS_READABLE(loop)) {
if (events[i].events & ~EPOLLOUT) {
loop->event_fd = events[i].data.fd;
loop->event_data = loop->udata ? loop->udata[events[i].data.fd] : NULL;
#ifdef WITH_BLOCKS
if (loop->io_read_block)
loop->io_read_block(loop, events[i].data.fd);
else
#endif
loop->io_read(loop, events[i].data.fd);
}
}
}
} else
#else
#ifdef WITH_KQUEUE
if ((loop->poll_fd > 0) && ((LOOP_IS_READABLE(loop)) || (LOOP_IS_WRITABLE(loop)))) {
struct kevent events[DOOPS_MAX_EVENTS];
struct timespec timeout_spec;
if (sleep_val >= 0) {
timeout_spec.tv_sec = sleep_val / 1000;
timeout_spec.tv_nsec = (sleep_val % 1000) * 1000;
}
int events_count = kevent(loop->poll_fd, NULL, 0, events, DOOPS_MAX_EVENTS, (sleep_val >= 0) ? &timeout_spec : NULL);
int i;
for (i = 0; i < events_count; i ++) {
if (LOOP_IS_WRITABLE(loop)) {
if (events[i].filter == EVFILT_WRITE) {
loop->event_fd = events[i].ident;
loop->event_data = events[i].udata;
#ifdef WITH_BLOCKS
if (loop->io_write_block)
loop->io_write_block(loop, events[i].ident);
else
#endif
loop->io_write(loop, events[i].ident);
}
}
if (LOOP_IS_READABLE(loop)) {
if (events[i].filter != EVFILT_WRITE) {
loop->event_fd = events[i].ident;
loop->event_data = events[i].udata;
#ifdef WITH_BLOCKS
if (loop->io_read_block)
loop->io_read_block(loop, events[i].ident);
else
#endif
loop->io_read(loop, events[i].ident);
}
}
}
} else
#else
if ((loop->max_fd) && ((LOOP_IS_READABLE(loop)) || (LOOP_IS_WRITABLE(loop)))) {
#ifdef WITH_POLL
int err = poll(loop->fds, loop->max_fd, sleep_val);
if (err >= 0) {
if (!err)
return;
int i;
for (i = 0; i < loop->max_fd; i ++) {
if (LOOP_IS_READABLE(loop)) {
if (loop->fds[i].revents & ~POLLOUT) {
loop->event_fd = loop->fds[i].fd;
loop->event_data = loop->udata ? loop->udata[i] : NULL;
#ifdef WITH_BLOCKS
if (loop->io_read_block)
loop->io_read_block(loop, loop->fds[i].fd);
else
#endif
loop->io_read(loop, loop->fds[i].fd);
}
}
if (LOOP_IS_WRITABLE(loop)) {
if (loop->fds[i].revents & POLLOUT) {
loop->event_fd = loop->fds[i].fd;
loop->event_data = loop->udata ? loop->udata[i] : NULL;
#ifdef WITH_BLOCKS
if (loop->io_write_block)
loop->io_write_block(loop, loop->fds[i].fd);
else
#endif
loop->io_write(loop, loop->fds[i].fd);
}
}
}
}
#else
struct timeval tout;
tout.tv_sec = 0;
tout.tv_usec = 0;
if (sleep_val > 0) {
tout.tv_sec = sleep_val / 1000;
tout.tv_usec = (sleep_val % 1000) * 1000;
}
fd_set inlist;
fd_set outlist;
fd_set exceptlist;
// fd_set is a struct
inlist = loop->inlist;
outlist = loop->outlist;
exceptlist = loop->exceptlist;
int err = select(loop->max_fd, &inlist, &outlist, &exceptlist, &tout);
if (err >= 0) {
if (!err)
return;
int i;