gst.poll
Module for [Poll] class
Types 1
A #GstPoll keeps track of file descriptors much like fd_set (used with select ()) or a struct pollfd array (used with poll ()). Once created with [gst.poll.Poll.new_], the set can be used to wait for file descriptors to be readable and/or writable. It is possible to make this wait be controlled by specifying true for the @controllable flag when creating the set (or later calling [gst.poll.Poll.setControllable]).
New file descriptors are added to the set using [gst.poll.Poll.addFd], and removed using [gst.poll.Poll.removeFd]. Controlling which file descriptors should be waited for to become readable and/or writable are done using [gst.poll.Poll.fdCtlRead], [gst.poll.Poll.fdCtlWrite] and [gst.poll.Poll.fdCtlPri].
Use [gst.poll.Poll.wait] to wait for the file descriptors to actually become readable and/or writable, or to timeout if no file descriptor is available in time. The wait can be controlled by calling [gst.poll.Poll.restart] and [gst.poll.Poll.setFlushing].
Once the file descriptor set has been waited for, one can use [gst.poll.Poll.fdHasClosed] to see if the file descriptor has been closed, [gst.poll.Poll.fdHasError] to see if it has generated an error, [gst.poll.Poll.fdCanRead] to see if it is possible to read from the file descriptor, and [gst.poll.Poll.fdCanWrite] to see if it is possible to write to it.
void * _cPtr()bool addFd(gst.poll_fd.PollFD fd)Add a file descriptor to the file descriptor set.bool fdCanRead(gst.poll_fd.PollFD fd)Check if fd in set has data to be read.bool fdCanWrite(gst.poll_fd.PollFD fd)Check if fd in set can be used for writing.bool fdCtlPri(gst.poll_fd.PollFD fd, bool active)Control whether the descriptor fd in set will be monitored for exceptional conditions (POLLPRI).bool fdCtlRead(gst.poll_fd.PollFD fd, bool active)Control whether the descriptor fd in set will be monitored for readability.bool fdCtlWrite(gst.poll_fd.PollFD fd, bool active)Control whether the descriptor fd in set will be monitored for writability.bool fdHasClosed(gst.poll_fd.PollFD fd)Check if fd in set has closed the connection.bool fdHasError(gst.poll_fd.PollFD fd)Check if fd in set has an error.bool fdHasPri(gst.poll_fd.PollFD fd)Check if fd in set has an exceptional condition (POLLPRI).void fdIgnored(gst.poll_fd.PollFD fd)Mark fd as ignored so that the next call to [gst.poll.Poll.wait] will yield the same result for fd as last time. This function must be called if no operation (read/write/recv/send/etc.) will be per...void getReadGpollfd(glib.types.PollFD fd)Get a GPollFD for the reading part of the control socket. This is useful when integrating with a GSource and GMainLoop.bool readControl()Read a byte from the control socket of the controllable set.bool removeFd(gst.poll_fd.PollFD fd)Remove a file descriptor from the file descriptor set.void restart()Restart any [gst.poll.Poll.wait] that is in progress. This function is typically used after adding or removing descriptors to set.bool setControllable(bool controllable)When controllable is true, this function ensures that future calls to [gst.poll.Poll.wait] will be affected by [gst.poll.Poll.restart] and [gst.poll.Poll.setFlushing].void setFlushing(bool flushing)When flushing is true, this function ensures that current and future calls to [gst.poll.Poll.wait] will return -1, with errno set to EBUSY.int wait(gst.types.ClockTime timeout)Wait for activity on the file descriptors in set. This function waits up to the specified timeout. A timeout of #GSTCLOCKTIME_NONE waits forever.bool writeControl()Write a byte to the control socket of the controllable set. This function is mostly useful for timer #GstPoll objects created with [gst.poll.Poll.newTimer].