/* ioset.h - srvx event loop
- * Copyright 2002-2004 srvx Development Team
+ * Copyright 2002-2004, 2006 srvx Development Team
*
* This file is part of srvx.
*
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
-#include "ioset.h"
+#include "ioset-impl.h"
#include "log.h"
#include "timeq.h"
#include "saxdb.h"
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
-#ifdef HAVE_SYS_SELECT_H
-#include <sys/select.h>
-#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
-#ifndef IOSET_DEBUG
-#define IOSET_DEBUG 0
-#endif
-
#define IS_EOL(CH) ((CH) == '\n')
extern int uplink_connect(void);
-static int clock_skew;
+int clock_skew;
int do_write_dbs;
int do_reopen;
-
-static struct io_fd **fds;
-static unsigned int fds_size;
-static fd_set read_fds, write_fds;
+static struct io_engine *engine;
+static struct io_fd *active_fd;
static void
ioq_init(struct ioq *ioq, int size) {
return new_size - ioq->put;
}
+extern struct io_engine io_engine_kqueue;
+extern struct io_engine io_engine_epoll;
+extern struct io_engine io_engine_win32;
+extern struct io_engine io_engine_select;
+
+void
+ioset_init(void)
+{
+ assert(engine == NULL);
+
+#if WITH_IOSET_KQUEUE
+ if (!engine && io_engine_kqueue.init())
+ engine = &io_engine_kqueue;
+#endif
+
+#if WITH_IOSET_EPOLL
+ if (!engine && io_engine_epoll.init())
+ engine = &io_engine_epoll;
+#endif
+
+#if WITH_IOSET_WIN32
+ if (!engine && io_engine_win32.init())
+ engine = &io_engine_win32;
+#endif
+
+ if (engine) {
+ /* we found one that works */
+ } else if (io_engine_select.init())
+ engine = &io_engine_select;
+ else
+ log_module(MAIN_LOG, LOG_FATAL, "No usable I/O engine found.");
+ log_module(MAIN_LOG, LOG_DEBUG, "Using %s I/O engine.", engine->name);
+}
+
void
ioset_cleanup(void) {
- free(fds);
+ engine->cleanup();
}
struct io_fd *
res->fd = fd;
ioq_init(&res->send, 1024);
ioq_init(&res->recv, 1024);
- if ((unsigned)fd >= fds_size) {
- unsigned int old_size = fds_size;
- fds_size = fd + 8;
- fds = realloc(fds, fds_size*sizeof(*fds));
- memset(fds+old_size, 0, (fds_size-old_size)*sizeof(*fds));
- }
- fds[fd] = res;
+ engine->add(res);
flags = fcntl(fd, F_GETFL);
fcntl(fd, F_SETFL, flags|O_NONBLOCK);
return res;
}
+struct io_fd *ioset_listen(struct sockaddr *local, unsigned int sa_size, void *data, void (*accept_cb)(struct io_fd *listener, struct io_fd *new_connect))
+{
+ struct io_fd *io_fd;
+ unsigned int opt;
+ int res;
+ int fd;
+
+ fd = socket(local ? local->sa_family : PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ log_module(MAIN_LOG, LOG_ERROR, "Unable to create listening socket: %s", strerror(errno));
+ return NULL;
+ }
+
+ if (local && sa_size) {
+ res = bind(fd, local, sa_size);
+ if (res < 0) {
+ log_module(MAIN_LOG, LOG_ERROR, "Unable to bind listening socket %d: %s", fd, strerror(errno));
+ close(fd);
+ return NULL;
+ }
+
+ opt = 1;
+ res = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&opt, sizeof(opt));
+ if (res < 0) {
+ log_module(MAIN_LOG, LOG_WARNING, "Unable to mark listener address as re-usable: %s", strerror(errno));
+ }
+ }
+
+ res = listen(fd, 1);
+ if (res < 0) {
+ log_module(MAIN_LOG, LOG_ERROR, "Unable to listen on socket %d: %s", fd, strerror(errno));
+ close(fd);
+ return NULL;
+ }
+
+ io_fd = ioset_add(fd);
+ if (!io_fd) {
+ close(fd);
+ return NULL;
+ }
+ io_fd->state = IO_LISTENING;
+ io_fd->data = data;
+ io_fd->accept_cb = accept_cb;
+ engine->update(io_fd);
+ return io_fd;
+}
+
struct io_fd *
ioset_connect(struct sockaddr *local, unsigned int sa_size, const char *peer, unsigned int port, int blocking, void *data, void (*connect_cb)(struct io_fd *fd, int error)) {
int fd, res;
close(fd);
return NULL;
}
+ io_fd->state = IO_CONNECTING;
io_fd->data = data;
io_fd->connect_cb = connect_cb;
if (res < 0) {
switch (errno) {
case EINPROGRESS: /* only if !blocking */
+ engine->update(io_fd);
return io_fd;
default:
log_module(MAIN_LOG, LOG_ERROR, "connect(%s:%d) (fd %d) returned errno %d (%s).", peer, port, io_fd->fd, errno, strerror(errno));
/* then fall through */
case EHOSTUNREACH:
case ECONNREFUSED:
- ioset_close(io_fd->fd, 1);
+ ioset_close(io_fd, 1);
+ engine->update(io_fd);
return NULL;
}
}
+ io_fd->state = IO_CONNECTED;
if (connect_cb)
connect_cb(io_fd, ((res < 0) ? errno : 0));
+ engine->update(io_fd);
return io_fd;
}
fd->send.get += res;
if (fd->send.get == fd->send.size)
fd->send.get = 0;
+ engine->update(fd);
}
}
void
-ioset_close(int fd, int os_close) {
- struct io_fd *fdp;
- if (!(fdp = fds[fd]))
- return;
- fds[fd] = NULL;
+ioset_close(struct io_fd *fdp, int os_close) {
+ if (!fdp)
+ return;
+ if (active_fd == fdp)
+ active_fd = NULL;
if (fdp->destroy_cb)
fdp->destroy_cb(fdp);
if (fdp->send.get != fdp->send.put) {
- int flags = fcntl(fd, F_GETFL);
- fcntl(fd, F_SETFL, flags&~O_NONBLOCK);
+ int flags;
+
+ flags = fcntl(fdp->fd, F_GETFL);
+ fcntl(fdp->fd, F_SETFL, flags&~O_NONBLOCK);
ioset_try_write(fdp);
/* it may need to send the beginning of the buffer now.. */
if (fdp->send.get != fdp->send.put)
free(fdp->send.buf);
free(fdp->recv.buf);
if (os_close)
- close(fd);
+ close(fdp->fd);
+ engine->remove(fdp);
free(fdp);
- FD_CLR(fd, &read_fds);
- FD_CLR(fd, &write_fds);
+}
+
+static void
+ioset_accept(struct io_fd *listener)
+{
+ struct io_fd *old_active_fd;
+ struct io_fd *new_fd;
+ int fd;
+
+ fd = accept(listener->fd, NULL, 0);
+ if (fd < 0) {
+ log_module(MAIN_LOG, LOG_ERROR, "Unable to accept new connection on listener %d: %s", listener->fd, strerror(errno));
+ return;
+ }
+
+ new_fd = ioset_add(fd);
+ new_fd->state = IO_CONNECTED;
+ old_active_fd = active_fd;
+ active_fd = new_fd;
+ listener->accept_cb(listener, new_fd);
+ assert(active_fd == NULL || active_fd == new_fd);
+ if (active_fd == new_fd) {
+ if (new_fd->send.get != new_fd->send.put)
+ ioset_try_write(new_fd);
+ else
+ engine->update(new_fd);
+ }
+ active_fd = old_active_fd;
}
static int
static void
ioset_buffered_read(struct io_fd *fd) {
int put_avail, nbr, fdnum;
-
+
if (!(put_avail = ioq_put_avail(&fd->recv)))
put_avail = ioq_grow(&fd->recv);
nbr = read(fd->fd, fd->recv.buf + fd->recv.put, put_avail);
default:
log_module(MAIN_LOG, LOG_ERROR, "Unexpected read() error %d on fd %d: %s", errno, fd->fd, strerror(errno));
/* Just flag it as EOF and call readable_cb() to notify the fd's owner. */
- fd->eof = 1;
- fd->wants_reads = 0;
+ fd->state = IO_CLOSED;
fd->readable_cb(fd);
+ if (active_fd == fd)
+ engine->update(fd);
}
} else if (nbr == 0) {
- fd->eof = 1;
- fd->wants_reads = 0;
+ fd->state = IO_CLOSED;
fd->readable_cb(fd);
+ if (active_fd == fd)
+ engine->update(fd);
} else {
if (fd->line_len == 0) {
unsigned int pos;
fd->recv.put = 0;
fdnum = fd->fd;
while (fd->wants_reads && (fd->line_len > 0)) {
+ struct io_fd *old_active;
+
+ old_active = active_fd;
+ active_fd = fd;
fd->readable_cb(fd);
- if (!fds[fdnum])
- break; /* make sure they didn't close on us */
- ioset_find_line_length(fd);
+ if (active_fd)
+ ioset_find_line_length(fd);
+ if (old_active != fd)
+ active_fd = old_active;
}
}
}
int
ioset_line_read(struct io_fd *fd, char *dest, int max) {
int avail, done;
- if (fd->eof && (!ioq_get_avail(&fd->recv) || (fd->line_len < 0)))
+ if ((fd->state == IO_CLOSED) && (!ioq_get_avail(&fd->recv) || (fd->line_len < 0)))
return 0;
if (fd->line_len < 0)
return -1;
return max;
}
-#if 1
-#define debug_fdsets(MSG, NFDS, READ_FDS, WRITE_FDS, EXCEPT_FDS, SELECT_TIMEOUT) (void)0
-#else
-static void
-debug_fdsets(const char *msg, int nfds, fd_set *read_fds, fd_set *write_fds, fd_set *except_fds, struct timeval *select_timeout) {
- static const char *flag_text[8] = { "---", "r", "w", "rw", "e", "er", "ew", "erw" };
- char buf[MAXLEN];
- int pos, ii, flags;
- struct timeval now;
-
- for (pos=ii=0; ii<nfds; ++ii) {
- flags = (read_fds && FD_ISSET(ii, read_fds)) ? 1 : 0;
- flags |= (write_fds && FD_ISSET(ii, write_fds)) ? 2 : 0;
- flags |= (except_fds && FD_ISSET(ii, except_fds)) ? 4 : 0;
- if (!flags)
- continue;
- pos += sprintf(buf+pos, " %d%s", ii, flag_text[flags]);
- }
- gettimeofday(&now, NULL);
- if (select_timeout) {
- log_module(MAIN_LOG, LOG_DEBUG, "%s, at "FMT_TIME_T".%06ld:%s (timeout "FMT_TIME_T".%06ld)", msg, now.tv_sec, now.tv_usec, buf, select_timeout->tv_sec, select_timeout->tv_usec);
- } else {
- log_module(MAIN_LOG, LOG_DEBUG, "%s, at "FMT_TIME_T".%06ld:%s (no timeout)", msg, now.tv_sec, now.tv_usec, buf);
+void
+ioset_events(struct io_fd *fd, int readable, int writable)
+{
+ if (!fd || (!readable && !writable))
+ return;
+ active_fd = fd;
+ switch (fd->state) {
+ case IO_CLOSED:
+ break;
+ case IO_LISTENING:
+ if (active_fd && readable)
+ ioset_accept(fd);
+ break;
+ case IO_CONNECTING:
+ assert(active_fd == NULL || active_fd == fd);
+ if (active_fd && writable) {
+ socklen_t arglen;
+ int rc;
+ arglen = sizeof(rc);
+ if (getsockopt(fd->fd, SOL_SOCKET, SO_ERROR, &rc, &arglen) < 0)
+ rc = errno;
+ fd->state = IO_CONNECTED;
+ if (fd->connect_cb)
+ fd->connect_cb(fd, rc);
+ if (active_fd == fd)
+ engine->update(fd);
+ }
+ /* and fall through */
+ case IO_CONNECTED:
+ assert(active_fd == NULL || active_fd == fd);
+ if (active_fd && readable) {
+ if (fd->line_reads)
+ ioset_buffered_read(fd);
+ else
+ fd->readable_cb(fd);
+ }
+
+ assert(active_fd == NULL || active_fd == fd);
+ if (active_fd && writable)
+ ioset_try_write(fd);
+ break;
}
}
-#endif
void
ioset_run(void) {
extern struct io_fd *socket_io_fd;
- struct timeval select_timeout;
- unsigned int nn;
- int select_result, max_fd;
+ struct timeval timeout;
time_t wakey;
- struct io_fd *fd;
while (!quit_services) {
while (!socket_io_fd)
/* How long to sleep? (fill in select_timeout) */
wakey = timeq_next();
if ((wakey - now) < 0)
- select_timeout.tv_sec = 0;
+ timeout.tv_sec = 0;
else
- select_timeout.tv_sec = wakey - now;
- select_timeout.tv_usec = 0;
-
- /* Set up read_fds and write_fds fdsets. */
- FD_ZERO(&read_fds);
- FD_ZERO(&write_fds);
- max_fd = 0;
- for (nn=0; nn<fds_size; nn++) {
- if (!(fd = fds[nn]))
- continue;
- max_fd = nn;
- if (fd->wants_reads)
- FD_SET(nn, &read_fds);
- if ((fd->send.get != fd->send.put) || !fd->connected)
- FD_SET(nn, &write_fds);
- }
+ timeout.tv_sec = wakey - now;
+ timeout.tv_usec = 0;
- /* Check for activity, update time. */
- debug_fdsets("Entering select", max_fd+1, &read_fds, &write_fds, NULL, &select_timeout);
- select_result = select(max_fd + 1, &read_fds, &write_fds, NULL, &select_timeout);
- debug_fdsets("After select", max_fd+1, &read_fds, &write_fds, NULL, &select_timeout);
- now = time(NULL) + clock_skew;
- if (select_result < 0) {
- if (errno != EINTR) {
- log_module(MAIN_LOG, LOG_ERROR, "select() error %d: %s", errno, strerror(errno));
- close_socket();
- }
- continue;
- }
-
- /* Call back anybody that has connect or read activity and wants to know. */
- for (nn=0; nn<fds_size; nn++) {
- if (!(fd = fds[nn]))
- continue;
- if (FD_ISSET(nn, &read_fds)) {
- if (fd->line_reads)
- ioset_buffered_read(fd);
- else
- fd->readable_cb(fd);
- }
- if (FD_ISSET(nn, &write_fds) && !fd->connected) {
- socklen_t arglen;
- int rc;
-
- arglen = sizeof(rc);
- if (getsockopt(fd->fd, SOL_SOCKET, SO_ERROR, &rc, &arglen) < 0)
- rc = errno;
- fd->connected = 1;
- if (fd->connect_cb)
- fd->connect_cb(fd, rc);
- }
- /* Note: check whether write FD is still set, since the
- * connect_cb() might close the FD, making us dereference
- * a free()'d pointer for the fd.
- */
- if (FD_ISSET(nn, &write_fds) && (fd->send.get != fd->send.put))
- ioset_try_write(fd);
- }
+ if (engine->loop(&timeout))
+ continue;
/* Call any timeq events we need to call. */
timeq_run();
fd->send.put += nbw;
if (fd->send.put == fd->send.size)
fd->send.put = 0;
+ engine->update(fd);
+}
+
+int
+ioset_printf(struct io_fd *fd, const char *fmt, ...) {
+ char tmpbuf[MAXLEN];
+ va_list ap;
+ int res;
+
+ va_start(ap, fmt);
+ res = vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap);
+ va_end(ap);
+ if (res > 0 && (size_t)res <= sizeof(tmpbuf))
+ ioset_write(fd, tmpbuf, res);
+ return res;
}
void
projects / srvx.git / blobdiff