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Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Otherwise, we pull events, but return -1. We should send the events we
were able to retrieve for now.
Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Split the api into plumbing and porcelain layers and move the
plumbing part to its own optional header file.
The main usecase is to fetch events from the device, route them
through the converter and extract the processed events. To simplify
the API, replace the intermediate mtdev_pull() function by the
higher-level mtdev_get(). This function does all the required steps,
and has the same semantics as read().
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The current semantics, that a non-empty conversion pipe means
the device is not idle, is not very useful. This patch changes
the semantics to simply checking if the fetch buffer is empty,
and if there are no events to fetch from the device.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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When reading from non-blocking devices, it makes sense to read
all events available. This patch lets a zero max_events achieve that.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The argument order in mtdev_fetch() differs from all other
usages involved the file descriptor. Fixed with this patch.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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This patch adds the mtdev_idle() function, which checks the kernel
device for activity. Useful when implementing timing logic.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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