--- /dev/null
+/*
+ * Copyright (c) 2015-2020 Red Hat, Inc.
+ *
+ * All rights reserved.
+ *
+ * Author: Jan Friesse (jfriesse@redhat.com)
+ *
+ * This software licensed under BSD license, the text of which follows:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - Neither the name of the Red Hat, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+
+#include <arpa/inet.h>
+#include <sys/queue.h>
+
+#include <assert.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "pr-poll-array.h"
+#include "pr-poll-loop.h"
+
+/*
+ * Needed for creating nspr handle from unix fd
+ */
+#include <private/pprio.h>
+
+/*
+ * Helper functions declarations
+ */
+static PRInt16 poll_events_to_pr_events(short events);
+
+static short pr_events_to_poll_events(PRInt16 events);
+
+static int pr_poll_loop_add_fd_int(struct pr_poll_loop *poll_loop,
+ int fd, PRFileDesc *prfd,
+ short events, pr_poll_loop_fd_set_events_cb_fn fd_set_events_cb,
+ pr_poll_loop_prfd_set_events_cb_fn prfd_set_events_cb,
+ pr_poll_loop_fd_read_cb_fn fd_read_cb, pr_poll_loop_prfd_read_cb_fn prfd_read_cb,
+ pr_poll_loop_fd_write_cb_fn fd_write_cb, pr_poll_loop_prfd_write_cb_fn prfd_write_cb,
+ pr_poll_loop_fd_err_cb_fn fd_err_cb, pr_poll_loop_prfd_err_cb_fn prfd_err_cb,
+ void *user_data1, void *user_data2);
+
+static int pr_poll_loop_del_fd_int(struct pr_poll_loop *poll_loop,
+ int fd, PRFileDesc *prfd);
+
+static struct pr_poll_loop_fd_entry *pr_poll_loop_find_by_fd(
+ const struct pr_poll_loop *poll_loop, int fd, PRFileDesc *prfd);
+
+static int prepare_poll_array(struct pr_poll_loop *poll_loop);
+
+/*
+ * Helper functions definitions
+ */
+static PRInt16
+poll_events_to_pr_events(short events)
+{
+ PRInt16 res;
+
+ res = 0;
+
+ if (events & POLLIN) {
+ res |= PR_POLL_READ;
+ }
+
+ if (events & POLLOUT) {
+ res |= PR_POLL_WRITE;
+ }
+
+ return (res);
+}
+
+static short
+pr_events_to_poll_events(PRInt16 events)
+{
+ short res;
+
+ res = 0;
+
+ if (events & PR_POLL_READ) {
+ res |= POLLIN;
+ }
+
+ if (events & PR_POLL_WRITE) {
+ res |= POLLOUT;
+ }
+
+ if (events & PR_POLL_ERR) {
+ res |= POLLERR;
+ }
+
+ if (events & PR_POLL_NVAL) {
+ res |= POLLNVAL;
+ }
+
+ if (events & PR_POLL_HUP) {
+ res |= POLLHUP;
+ }
+
+ if (events & PR_POLL_EXCEPT) {
+ res |= POLLERR;
+ }
+
+ return (res);
+}
+
+static int
+pr_poll_loop_add_fd_int(struct pr_poll_loop *poll_loop, int fd, PRFileDesc *prfd,
+ short events, pr_poll_loop_fd_set_events_cb_fn fd_set_events_cb,
+ pr_poll_loop_prfd_set_events_cb_fn prfd_set_events_cb,
+ pr_poll_loop_fd_read_cb_fn fd_read_cb, pr_poll_loop_prfd_read_cb_fn prfd_read_cb,
+ pr_poll_loop_fd_write_cb_fn fd_write_cb, pr_poll_loop_prfd_write_cb_fn prfd_write_cb,
+ pr_poll_loop_fd_err_cb_fn fd_err_cb, pr_poll_loop_prfd_err_cb_fn prfd_err_cb,
+ void *user_data1, void *user_data2)
+{
+ struct pr_poll_loop_fd_entry *new_entry;
+
+ assert((prfd != NULL && fd == -1) || (fd != -1 && prfd == NULL));
+
+ if ((events & ~(POLLIN|POLLOUT)) != 0) {
+ return (-1);
+ }
+
+ if (pr_poll_loop_find_by_fd(poll_loop, fd, prfd) != NULL) {
+ return (-1);
+ }
+
+ new_entry = malloc(sizeof(*new_entry));
+ if (new_entry == NULL) {
+ return (-1);
+ }
+
+ memset(new_entry, 0, sizeof(*new_entry));
+
+ new_entry->fd = fd;
+
+ if (fd != -1) {
+ new_entry->prfd = PR_CreateSocketPollFd(fd);
+ if (new_entry->prfd == NULL) {
+ free(new_entry);
+
+ return (-1);
+ }
+ } else {
+ new_entry->prfd = prfd;
+ }
+
+ new_entry->events = events;
+
+ new_entry->fd_set_events_cb = fd_set_events_cb;
+ new_entry->prfd_set_events_cb = prfd_set_events_cb;
+
+ new_entry->fd_read_cb = fd_read_cb;
+ new_entry->prfd_read_cb = prfd_read_cb;
+
+ new_entry->fd_write_cb = fd_write_cb;
+ new_entry->prfd_write_cb = prfd_write_cb;
+
+ new_entry->fd_err_cb = fd_err_cb;
+ new_entry->prfd_err_cb = prfd_err_cb;
+
+ new_entry->user_data1 = user_data1;
+ new_entry->user_data2 = user_data2;
+
+ TAILQ_INSERT_TAIL(&poll_loop->fd_list, new_entry, entries);
+
+ return (0);
+}
+
+static int
+pr_poll_loop_del_fd_int(struct pr_poll_loop *poll_loop, int fd, PRFileDesc *prfd)
+{
+ struct pr_poll_loop_fd_entry *fd_entry;
+
+ fd_entry = pr_poll_loop_find_by_fd(poll_loop, fd, prfd);
+ if (fd_entry == NULL) {
+ return (-1);
+ }
+
+ TAILQ_REMOVE(&poll_loop->fd_list, fd_entry, entries);
+
+ if (fd_entry->fd != -1) {
+ (void)PR_DestroySocketPollFd(fd_entry->prfd);
+ }
+
+ free(fd_entry);
+
+ return (0);
+}
+
+static struct pr_poll_loop_fd_entry *
+pr_poll_loop_find_by_fd(const struct pr_poll_loop *poll_loop, int fd, PRFileDesc *prfd)
+{
+ struct pr_poll_loop_fd_entry *fd_entry;
+
+ assert((prfd != NULL && fd == -1) || (fd != -1 && prfd == NULL));
+
+ TAILQ_FOREACH(fd_entry, &poll_loop->fd_list, entries) {
+ if (fd != -1) {
+ if (fd_entry->fd == fd) {
+ return (fd_entry);
+ }
+ } else {
+ if (fd_entry->prfd == prfd) {
+ return (fd_entry);
+ }
+ }
+ }
+
+ return (NULL);
+}
+
+static
+int prepare_poll_array(struct pr_poll_loop *poll_loop)
+{
+ struct pr_poll_loop_fd_entry *fd_entry;
+ struct pr_poll_loop_fd_entry *fd_entry_next;
+ struct pr_poll_loop_fd_entry **user_data;
+ short events;
+ int res;
+ PRPollDesc *poll_desc;
+ struct pr_poll_array *poll_array;
+
+ poll_array = &poll_loop->poll_array;
+
+ pr_poll_array_clean(poll_array);
+
+ /*
+ * Fill in poll_array
+ */
+ fd_entry = TAILQ_FIRST(&poll_loop->fd_list);
+
+ while (fd_entry != NULL) {
+ fd_entry_next = TAILQ_NEXT(fd_entry, entries);
+
+ events = fd_entry->events;
+
+ if (fd_entry->fd_set_events_cb != NULL || fd_entry->prfd_set_events_cb != NULL) {
+ if (fd_entry->fd_set_events_cb != NULL) {
+ res = fd_entry->fd_set_events_cb(fd_entry->fd, &events,
+ fd_entry->user_data1, fd_entry->user_data2);
+ } else {
+ res = fd_entry->prfd_set_events_cb(fd_entry->prfd, &events,
+ fd_entry->user_data1, fd_entry->user_data2);
+ }
+ } else {
+ /*
+ * Add entry
+ */
+ res = 0;
+ }
+
+ if ((events & ~(POLLIN|POLLOUT)) != 0) {
+ return (-2);
+ }
+
+ switch (res) {
+ case 0:
+ /*
+ * Add entry
+ */
+ if (pr_poll_array_add(poll_array, &poll_desc, (void **)&user_data) < 0) {
+ return (-1);
+ }
+
+ poll_desc->fd = fd_entry->prfd;
+ poll_desc->in_flags = poll_events_to_pr_events(events);
+
+ *user_data = fd_entry;
+ break;
+ case -1:
+ /*
+ * Do not add entry
+ */
+ break;
+ case -2:
+ /*
+ * -2 = return immediately
+ */
+ return (-1);
+ break;
+ default:
+ return (-2);
+ break;
+ }
+
+ fd_entry = fd_entry_next;
+ }
+
+ pr_poll_array_gc(poll_array);
+
+ return (0);
+}
+
+/*
+ * Exported functions
+ */
+void
+pr_poll_loop_init(struct pr_poll_loop *poll_loop)
+{
+
+ memset(poll_loop, 0, sizeof(*poll_loop));
+
+ TAILQ_INIT(&(poll_loop->fd_list));
+
+ pr_poll_array_init(&poll_loop->poll_array, sizeof(struct pr_poll_loop_fd_entry *));
+ timer_list_init(&poll_loop->tlist);
+}
+
+int
+pr_poll_loop_del_fd(struct pr_poll_loop *poll_loop, int fd)
+{
+
+ return (pr_poll_loop_del_fd_int(poll_loop, fd, NULL));
+}
+
+int
+pr_poll_loop_del_prfd(struct pr_poll_loop *poll_loop, PRFileDesc *prfd)
+{
+
+ return (pr_poll_loop_del_fd_int(poll_loop, -1, prfd));
+}
+
+int
+pr_poll_loop_destroy(struct pr_poll_loop *poll_loop)
+{
+ struct pr_poll_loop_fd_entry *fd_entry;
+ struct pr_poll_loop_fd_entry *fd_entry_next;
+
+ fd_entry = TAILQ_FIRST(&poll_loop->fd_list);
+
+ while (fd_entry != NULL) {
+ fd_entry_next = TAILQ_NEXT(fd_entry, entries);
+
+ if (fd_entry->fd != -1) {
+ (void)PR_DestroySocketPollFd(fd_entry->prfd);
+ }
+
+ free(fd_entry);
+
+ fd_entry = fd_entry_next;
+ }
+
+ TAILQ_INIT(&(poll_loop->fd_list));
+
+ pr_poll_array_destroy(&poll_loop->poll_array);
+ timer_list_free(&poll_loop->tlist);
+
+ return (0);
+}
+
+int
+pr_poll_loop_add_fd(struct pr_poll_loop *poll_loop, int fd,
+ short events, pr_poll_loop_fd_set_events_cb_fn fd_set_events_cb,
+ pr_poll_loop_fd_read_cb_fn fd_read_cb,
+ pr_poll_loop_fd_write_cb_fn fd_write_cb,
+ pr_poll_loop_fd_err_cb_fn fd_err_cb,
+ void *user_data1, void *user_data2)
+{
+
+ return (pr_poll_loop_add_fd_int(poll_loop, fd, NULL, events,
+ fd_set_events_cb, NULL, fd_read_cb, NULL, fd_write_cb, NULL,
+ fd_err_cb, NULL,
+ user_data1, user_data2));
+}
+
+int
+pr_poll_loop_add_prfd(struct pr_poll_loop *poll_loop, PRFileDesc *prfd,
+ short events, pr_poll_loop_prfd_set_events_cb_fn prfd_set_events_cb,
+ pr_poll_loop_prfd_read_cb_fn prfd_read_cb,
+ pr_poll_loop_prfd_read_cb_fn prfd_write_cb,
+ pr_poll_loop_prfd_err_cb_fn prfd_err_cb,
+ void *user_data1, void *user_data2)
+{
+
+ return (pr_poll_loop_add_fd_int(poll_loop, -1, prfd, events,
+ NULL, prfd_set_events_cb, NULL, prfd_read_cb, NULL, prfd_write_cb,
+ NULL, prfd_err_cb,
+ user_data1, user_data2));
+}
+
+int
+pr_poll_loop_exec(struct pr_poll_loop *poll_loop)
+{
+ PRInt32 poll_res;
+ struct pr_poll_loop_fd_entry *fd_entry;
+ struct pr_poll_loop_fd_entry **user_data;
+ ssize_t i;
+ int cb_res;
+ static PRPollDesc *pfds;
+ int res;
+
+ if ((res = prepare_poll_array(poll_loop)) != 0) {
+ return (res);
+ }
+
+ pfds = poll_loop->poll_array.array;
+
+ if ((poll_res = PR_Poll(pfds, pr_poll_array_size(&poll_loop->poll_array),
+ timer_list_time_to_expire(&poll_loop->tlist))) > 0) {
+ for (i = 0; i < pr_poll_array_size(&poll_loop->poll_array); i++) {
+ user_data = pr_poll_array_get_user_data(&poll_loop->poll_array, i);
+ fd_entry = *user_data;
+
+ if (pfds[i].out_flags & PR_POLL_READ &&
+ (fd_entry->fd_read_cb != NULL || fd_entry->prfd_read_cb != NULL)) {
+ if (fd_entry->fd_read_cb) {
+ cb_res = fd_entry->fd_read_cb(fd_entry->fd,
+ fd_entry->user_data1, fd_entry->user_data2);
+ } else {
+ cb_res = fd_entry->prfd_read_cb(fd_entry->prfd,
+ fd_entry->user_data1, fd_entry->user_data2);
+ }
+
+ if (cb_res != 0) {
+ return (-1);
+ }
+ }
+
+ if (pfds[i].out_flags & PR_POLL_WRITE &&
+ (fd_entry->fd_write_cb != NULL || fd_entry->prfd_write_cb != NULL)) {
+ if (fd_entry->fd_write_cb) {
+ cb_res = fd_entry->fd_write_cb(fd_entry->fd,
+ fd_entry->user_data1, fd_entry->user_data2);
+ } else {
+ cb_res = fd_entry->prfd_write_cb(fd_entry->prfd,
+ fd_entry->user_data1, fd_entry->user_data2);
+ }
+
+ if (cb_res != 0) {
+ return (-1);
+ }
+ }
+
+ if ((pfds[i].out_flags & (PR_POLL_ERR|PR_POLL_NVAL|PR_POLL_HUP|PR_POLL_EXCEPT)) &&
+ !(pfds[i].out_flags & (PR_POLL_READ|PR_POLL_WRITE)) &&
+ (fd_entry->fd_err_cb != NULL || fd_entry->prfd_err_cb != NULL)) {
+ if (fd_entry->fd_err_cb) {
+ cb_res = fd_entry->fd_err_cb(fd_entry->fd,
+ pr_events_to_poll_events(pfds[i].out_flags),
+ fd_entry->user_data1, fd_entry->user_data2);
+ } else {
+ cb_res = fd_entry->prfd_err_cb(fd_entry->prfd,
+ pr_events_to_poll_events(pfds[i].out_flags),
+ fd_entry->user_data1, fd_entry->user_data2);
+ }
+
+ if (cb_res != 0) {
+ return (-1);
+ }
+ }
+ }
+ }
+
+ timer_list_expire(&poll_loop->tlist);
+
+ return (0);
+}
+
+struct timer_list *
+pr_poll_loop_get_timer_list(struct pr_poll_loop *poll_loop)
+{
+
+ return (&poll_loop->tlist);
+}
--- /dev/null
+/*
+ * Copyright (c) 2015-2020 Red Hat, Inc.
+ *
+ * All rights reserved.
+ *
+ * Author: Jan Friesse (jfriesse@redhat.com)
+ *
+ * This software licensed under BSD license, the text of which follows:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - Neither the name of the Red Hat, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _PR_POLL_LOOP_H_
+#define _PR_POLL_LOOP_H_
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+#include <nspr.h>
+#include <poll.h>
+
+#include "pr-poll-array.h"
+#include "timer-list.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Return code: 0 - Ok, -1 - Don't add client, -2 - Return poll error
+ */
+typedef int (*pr_poll_loop_fd_set_events_cb_fn)(int fd, short *events,
+ void *user_data1, void *user_data2);
+typedef int (*pr_poll_loop_prfd_set_events_cb_fn)(PRFileDesc *prfd, short *events,
+ void *user_data1, void *user_data2);
+
+/*
+ * Return code: 0 - Ok, -1 - Return error
+ */
+typedef int (*pr_poll_loop_fd_read_cb_fn)(int fd, void *user_data1, void *user_data2);
+typedef int (*pr_poll_loop_prfd_read_cb_fn)(PRFileDesc *prfd, void *user_data1, void *user_data2);
+
+/*
+ * Return code: 0 - Ok, -1 - Return error
+ */
+typedef int (*pr_poll_loop_fd_write_cb_fn)(int fd, void *user_data1, void *user_data2);
+typedef int (*pr_poll_loop_prfd_write_cb_fn)(PRFileDesc *prfd, void *user_data1, void *user_data2);
+
+/*
+ * Return code: 0 - Ok, -1 - Return error
+ */
+typedef int (*pr_poll_loop_fd_err_cb_fn)(int fd, short revents, void *user_data1, void *user_data2);
+typedef int (*pr_poll_loop_prfd_err_cb_fn)(PRFileDesc *prfd, short revents, void *user_data1, void *user_data2);
+
+struct pr_poll_loop_fd_entry {
+ int fd;
+ PRFileDesc *prfd;
+ short events;
+ pr_poll_loop_fd_set_events_cb_fn fd_set_events_cb;
+ pr_poll_loop_prfd_set_events_cb_fn prfd_set_events_cb;
+ pr_poll_loop_fd_read_cb_fn fd_read_cb;
+ pr_poll_loop_prfd_read_cb_fn prfd_read_cb;
+ pr_poll_loop_fd_write_cb_fn fd_write_cb;
+ pr_poll_loop_prfd_write_cb_fn prfd_write_cb;
+ pr_poll_loop_fd_err_cb_fn fd_err_cb;
+ pr_poll_loop_prfd_err_cb_fn prfd_err_cb;
+ void *user_data1;
+ void *user_data2;
+ TAILQ_ENTRY(pr_poll_loop_fd_entry) entries;
+};
+
+struct pr_poll_loop {
+ TAILQ_HEAD(, pr_poll_loop_fd_entry) fd_list;
+ struct timer_list tlist;
+ struct pr_poll_array poll_array;
+};
+
+extern void pr_poll_loop_init(struct pr_poll_loop *poll_loop);
+
+extern int pr_poll_loop_add_fd(struct pr_poll_loop *poll_loop, int fd,
+ short events, pr_poll_loop_fd_set_events_cb_fn fd_set_events_cb,
+ pr_poll_loop_fd_read_cb_fn fd_read_cb,
+ pr_poll_loop_fd_read_cb_fn fd_write_cb,
+ pr_poll_loop_fd_err_cb_fn fd_err_cb,
+ void *user_data1, void *user_data2);
+
+extern int pr_poll_loop_add_prfd(struct pr_poll_loop *poll_loop,
+ PRFileDesc *prfd, short events,
+ pr_poll_loop_prfd_set_events_cb_fn prfd_set_events_cb,
+ pr_poll_loop_prfd_read_cb_fn fd_read_cb,
+ pr_poll_loop_prfd_read_cb_fn fd_write_cb,
+ pr_poll_loop_prfd_err_cb_fn fd_err_cb,
+ void *user_data1, void *user_data2);
+
+extern int pr_poll_loop_del_fd(struct pr_poll_loop *poll_loop, int fd);
+
+extern int pr_poll_loop_del_prfd(struct pr_poll_loop *poll_loop,
+ PRFileDesc *prfd);
+
+/*
+ * Return codes:
+ * 0 - No error and all callbacks returned 0
+ * -1 - Either set_events returned -2 or some other callbacks returned -1
+ * -2 - Other error (events is not POLLIN|POLLOUT, or set_events cb was not 0, -1 or -2)
+ */
+extern int pr_poll_loop_exec(struct pr_poll_loop *poll_loop);
+
+extern int pr_poll_loop_destroy(struct pr_poll_loop *poll_loop);
+
+extern struct timer_list *pr_poll_loop_get_timer_list(struct pr_poll_loop *poll_loop);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _PR_POLL_LOOP_H_ */
projects / mirror_corosync-qdevice.git / commitdiff