diff options
Diffstat (limited to 'src/libmowgli/eventloop/qnx_pollops.c')
| -rw-r--r-- | src/libmowgli/eventloop/qnx_pollops.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/src/libmowgli/eventloop/qnx_pollops.c b/src/libmowgli/eventloop/qnx_pollops.c new file mode 100644 index 0000000..7417ef4 --- /dev/null +++ b/src/libmowgli/eventloop/qnx_pollops.c @@ -0,0 +1,200 @@ +/* + * Copyright (c) 2012 William Pitcock <nenolod@dereferenced.org>. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "mowgli.h" + +#ifdef HAVE_DISPATCH_BLOCK + +#include <sys/iofunc.h> +#include <sys/dispatch.h> + +typedef struct { + dispatch_t *dpp; + dispatch_context_t *ctp; +} mowgli_qnx_eventloop_private_t; + +static void mowgli_qnx_eventloop_pollsetup(mowgli_eventloop_t *eventloop) +{ + mowgli_qnx_eventloop_private_t *priv; + + priv = mowgli_alloc(sizeof(mowgli_qnx_eventloop_private_t)); + eventloop->poller = priv; + + priv->dpp = dispatch_create(); + + return; +} + +static void mowgli_qnx_eventloop_pollshutdown(mowgli_eventloop_t *eventloop) +{ + mowgli_qnx_eventloop_private_t *priv; + + return_if_fail(eventloop != NULL); + + priv = eventloop->poller; + + if (priv->ctp != NULL) + dispatch_context_free(priv->ctp); + + dispatch_destroy(priv->dpp); + mowgli_free(priv); + + return; +} + +static void mowgli_qnx_eventloop_destroy(mowgli_eventloop_t *eventloop, mowgli_eventloop_pollable_t *pollable) +{ + mowgli_qnx_eventloop_private_t *priv; + + return_if_fail(eventloop != NULL); + return_if_fail(pollable != NULL); + + priv = eventloop->poller; + + if (select_detach(priv->dpp, pollable->fd) != 0) + { + if (mowgli_eventloop_ignore_errno(errno)) + return; + + mowgli_log("mowgli_qnx_eventloop_destroy(): select_detach failed: %d (%s)", errno, strerror(errno)); + } +} + +static void mowgli_qnx_eventloop_event_cb(select_context_t *ctp, mowgli_descriptor_t fd, unsigned int flags, void *userdata) +{ + mowgli_eventloop_t *eventloop; + mowgli_eventloop_pollable_t *pollable; + + return_if_fail(ctp != NULL); + return_if_fail(userdata != NULL); + + pollable = userdata; + eventloop = pollable->eventloop; + + return_if_fail(eventloop != NULL); + + if (flags & (SELECT_FLAG_READ | SELECT_FLAG_EXCEPT)) + pollable->read_function(eventloop, pollable, MOWGLI_EVENTLOOP_IO_READ, pollable->userdata); + + if (flags & (SELECT_FLAG_WRITE | SELECT_FLAG_EXCEPT)) + pollable->write_function(eventloop, pollable, MOWGLI_EVENTLOOP_IO_WRITE, pollable->userdata); +} + +static void mowgli_qnx_eventloop_setselect(mowgli_eventloop_t *eventloop, mowgli_eventloop_pollable_t *pollable, mowgli_eventloop_io_dir_t dir, mowgli_eventloop_io_cb_t *event_function) +{ + mowgli_qnx_eventloop_private_t *priv; + select_attr_t attr = {}; + unsigned int old_flags; + + return_if_fail(eventloop != NULL); + return_if_fail(pollable != NULL); + + priv = eventloop->poller; + old_flags = pollable->slot; + +#ifdef DEBUG + mowgli_log("setselect %p fd %d func %p", pollable, pollable->fd, event_function); +#endif + + switch (dir) + { + case MOWGLI_EVENTLOOP_IO_READ: + pollable->read_function = event_function; + pollable->slot |= SELECT_FLAG_READ; + break; + case MOWGLI_EVENTLOOP_IO_WRITE: + pollable->write_function = event_function; + pollable->slot |= SELECT_FLAG_WRITE; + break; + default: + mowgli_log("unhandled pollable direction %d", dir); + break; + } + +#ifdef DEBUG + mowgli_log("%p -> read %p : write %p", pollable, pollable->read_function, pollable->write_function); +#endif + + if (pollable->read_function == NULL) + pollable->slot &= ~SELECT_FLAG_READ; + + if (pollable->write_function == NULL) + pollable->slot &= ~SELECT_FLAG_WRITE; + + if (old_flags == 0 && pollable->slot == 0) + return; + + if (old_flags) + select_detach(priv->dpp, pollable->fd); + + if (pollable->slot) + { + if (select_attach(priv->dpp, &attr, pollable->fd, pollable->slot, mowgli_qnx_eventloop_event_cb, pollable) != 0) + { + if (mowgli_eventloop_ignore_errno(errno)) + return; + + mowgli_log("mowgli_qnx_eventloop_setselect(): select_attach failed: %d (%s)", errno, strerror(errno)); + } + } + + return; +} + +static void mowgli_qnx_eventloop_select(mowgli_eventloop_t *eventloop, int delay) +{ + dispatch_context_t *new_ctp; + mowgli_qnx_eventloop_private_t *priv; + + return_if_fail(eventloop != NULL); + + priv = eventloop->poller; + + /* set timeout if needed */ + dispatch_timeout(priv->dpp, delay >= 0 ? &(struct timespec){ .tv_sec = delay / 1000, .tv_nsec = delay % 1000 * 1000000 } : NULL); + + if (priv->ctp != NULL) + priv->ctp = dispatch_context_alloc(priv->dpp); + + /* if dispatch_block returns non-NULL, priv->ctp may have been realloc()'d, NULL is error condition */ + if ((new_ctp = dispatch_block(priv->ctp)) != NULL) + priv->ctp = new_ctp; + else + { + if (mowgli_eventloop_ignore_errno(errno)) + return; + + mowgli_log("mowgli_qnx_eventloop_select(): dispatch_block failed: %d (%s)", errno, strerror(errno)); + } + + mowgli_eventloop_synchronize(eventloop); +} + +mowgli_eventloop_ops_t _mowgli_qnx_pollops = { + .timeout_once = mowgli_simple_eventloop_timeout_once, + .run_once = mowgli_simple_eventloop_run_once, + .pollsetup = mowgli_qnx_eventloop_pollsetup, + .pollshutdown = mowgli_qnx_eventloop_pollshutdown, + .setselect = mowgli_qnx_eventloop_setselect, + .select = mowgli_qnx_eventloop_select, + .destroy = mowgli_qnx_eventloop_destroy, +}; + +#endif |